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PLAINTIFF'S EXHIBIT I Purchaser's I Identification: [Order No. NY~77l602 Spec. No. PSCC-C2-102-SG Date of Spec. October 1, 1958 Revision Oates: R 1 August 1*+, 1959 R2 R3 EBASCO SPECIFICATION SPECIFICATION EBASCO 56-50 STEAM-GENERATING UNITS AND ACCESSORIES .-S RATING COMPANY PUBLIC SERVICE COMPANY OF COLORADO_____________________ STATION CHEROKEE STEAM ELECTRIC STATION PROJECT 1959 - HO OOP KW EXTENSIONuN I T NO. 2 LOCAT I ON DENVER, COLORADO (l mile north of city limits) SELLER ev. 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No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August Ik, 1959 9 Tests shall be conducted to satisfaction of Purchaser as follows: .1 Before construction of setting, Seller shall subject all pressure parts of complete unit to hydrostatic test at 1-1/2 times working pressure, in presence of and to satisfaction of insurance company's boiler inspector and other inspectors if required. Seller shall furnish test pump and Purchaser shall make pro visions fo-r water required. Refer to paragraph 37 for water requirements. .2 During initial operating period Seller shall take necessary superheater-tube metal temperatures to determine procedure in bringing up pressure and to determine tube temperatures encountered over entire range of steam output. Seller shall furnish and install wire, instruments and thermocouples. Type and location of thermocouples shall be subject to Pur chaser's review and approval. 3 Tests to demonstrate capacity and guaranteed over-all efficiency of unit shall be conducted by Purchaser using installed plant instruments, after notification to Seller, so that Seller's engineers may be present. In case of failure of unit to meet guarantees, Seller shall take necessary measures to correct conditions, and retesting shall be at Seller's expense. .4 Tests to demonstrate guarantees specified herein shall be governed by provisions of ASME Power Test Code for Stationary Steam-Generating Units, latest issue, and other applicable ASME Power Test Codes. TESTS CONSTRUCTION FEATURES .0 Steam generator shall be of Babcock Sc Wilcox manufacture GENERAL and of reheat, radiant, single drum, divided suction furnace, top fired, outdoor type, and in general shall be in accord with Proposition drawings No. P5-29528-16X0 Final .1 Major physical data shall be as follows: 9029F a Boiler water-heating surface excluding water-cooled furnace surface 11,820 sq ft b Superheating surface 39j306 sq ft - lU - WAD00090 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August 14, 1959 c Water-cooled furnace heating surface (see paragraph lj) 23.948 sq ft d Area e Economizer heating surface 19,823 sq ft f Airheater surface 281.330 sq ft g Reheating surface 30,120 sq ft h Furnace volume Total 79,160 cu ft .2 Seller shall provide protection against freezing of instrumentation systems supplied by him as follows: All instrumentation or other piping by adequate insulation and arrangements for draining, including electric heating cable as approved by Purchaser. Dust hoppers by provision of extra thickness of heat insulation. Drum water and steam sampling lines_________ Water column drains and blowdown Header drains enclosed in pipe chase________ Furnished by Seller (See Par. 35, Page 42) GENERAL (Cont'd) - 15 - WAD00091 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 11 Boiler drums as listed below shall be in accordance with ASME Boiler Construction Code, fusion-welded and stress relieved, and with welded seams radiographed as required therein. Drum plates shall be of 70 000 psi tensile strength, specification ASME BOILER DRUMS Drum No. Location Inside Diameter Over-all Length 1 Steam Drum 60M 54-1 -6" Plate Thickness 4-1/4" _____ ____________________________i____________ .1 Nozzles shall be provided on drums for connections and services as listed below. All nozzles shall be of sufficient length to permit rewelding. Drum No. Service No. of Nozzles Size Type of Connection 1 Main Steam on Superheater 1 Feed Water 2 6-5/8" Welded Thermal Sleeve 1 Safety Valve 3 3" Flanged 1 Saturated Steam 1 3" Butt Welded 1 Pressure Gage 2 1" Socket Welded Water-level 1 recorder 2 1" Socket Welded Feed Water 1 Regulator 2 1" Socket Welded Continuous 1 blowdown 1 1-1/2" Socket Welded 1 Steam Sampling 2 1" Socket Welded 1 Water Sampling 1 1" Socket Welded 1 Chemical Feed 1 1" Socket Welded - 16 - WAD00092 Drum No. 1 1 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 Service Vent Case Glass No. of Nozzles 2 Size 1-1/2" Type of Connection Socket Welded 4 1-1/2" Socket Welded BOILER DRUMS (Cont'd) .2 All flanged nozzles shall be dimensioned in accordance with ASME specifications for 2,500 psig and shall have ring joint facing. Internal piping shall be furnished for feed water, blowoff, boiler-water sampling, chemical feed and continuous blowdown. 3 Internal surfaces of boiler drums, and Leaders shall be cleaned by Shot blasting 12 Boiler tubes shall be of seamless carbon steel, designed for working pressure of 1725 psig, as follows: Number Size Thickness Material 216 2-31/32" 122 4" .200 * SA-210 SA-210 14 4-1/2" .480 SA-210 34 5" .340 SA-210 6 4" 24 5.56" .280 500 SA-210 SA-106 * .320" th for connection pass section of 6l inner row tubes .280" th for remainder of inner row and complete outer row 13 Soot-blowing equipment for boiler economizer, superheater reheater and airheater shall be furnished. Soot-blowing equipment shall be Vulcan Soot Blowing Corp manufacture, suitable for outdoor installation. The system shall be auto matic, electric sequentially operated, and shall use compressed air as a blowing medium. Blowers shall be driven by electric motors suitable for use with 440 volt, 3 phase, 60 cycle a-c. - 17 - BOILER TUBES SOOT-BLOWERS WAD00093 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser1s Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August 14, 1959 Motor starters furnished for these motors shall be combination type with overload protection. Motors shall be in accordance with Ebasco Specification MX-2, revised Nov. 22, 1954; motors for General Service, one copy of which is attached and forms a part of this specification. SOOT BLOWERS (Cont'd) The numbers and types of units which shall be furnished are as follows: Item 1 - Furnace 16 - Model RW-2E, electric motor driven wall blowers complete with two (2) totally enclosed motors, limit switches, NEMA No. 4 local pushbutton stations and size 1 contactors wired to terminal strips in NEMA No. 1A contactor cabinets. Mechanical blowing valve, stainless steel blowing lance, adjustable pressure control included. 4 Wall boxes for possible future T-3E Blowers if required. Item 2 - Reheater and Superheater 14- - Model T-3E (4 with 9'-6" travel; 10 with 20'-0" travel) electric driven long retractable units. Each unit complete with alloy lance, stainless steel feed pipe and mechanically operated blowing valve with adjustable pressure control. NEMA No. 4 local pushbutton stations and size 1 contactors wired to terminal strips in NEMA No. 1A contactor cabinets. Two totally enclosed motors and limit switches included. Item 3 - Airheater Cleaners 2 - Model THE electric motor driven, traveling frame air-heater cleaners. Totally enclosed motors, NEMA No. 4 local push button stations, size 1 contactors wired to terminal strips in NEMA No. 1A contactor cabinets, limit switches and low blowing air pressure stop. Item 4 - Controls for Automatic Sequential Operation The following controls and indicating devices, to be supplied by Copes-Vulcan and mounted on a panel also supplied by Copes-Vulcan: 2 - Electro-controllers mounted in dust-tight boxes and wired to terminal strips. 32 - Toggle switches, three positioned (auto-manual-neutral) 1 - Master switch, Westinghouse Type W or equal (for electrocontrollers.) - 18 - WAD00094 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser'8 Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 Item 4 - Controls for Automatic Sequential Operation (Cont'd) 1 - Low receiver pressure interlock, including pressure switch, light and relay. 1 - 4-1/2" Air header pressure gauge. 1 - "Low header pressure" interlock including pressure switch, panel mounted warning light and relay (auto matically retracts blower in event of low header pressure.) 1 - "No blowing air" warning timer relay and panel mounted warning light (automatically retracts, and/or prevents unit from going in furnace without air flow ing through lance.) 1 - Magnetic overload relay and panel mounted warning light (automatically retracts unit in event of motor overload.) 1 - Semi-enclosed, free-standing panel with top, sides or framework, but not including back or doors. Size approximately 7 ft-6 in. high x 3 ft-0 in. wide. Item 9 - Piping, Valves and Fittings 30 - 2-1/2" branches, Schedule 40 pipe. 2-4" headers. Schedule 40 pipe. 2 - 3/4" Edward drain valves Figure No. 444 Y. 1 - 3" - 300 lb standard steel manually operated main snut-off valve. Necessary pipe hangers and guides Necessary tubing where required. Air consumption shall be at 150 and 200 psig, blowing pressure, baaed on completing one complete blowing cycle in not more than 7 hours. All air piping for soot blowers integral with and mounted on steam-generating unit shall be furnished by Seller from a single supply connection point. A steel 600 lb standard main shut-off valve at this point, furnished by Seller, shall be Purchaser's connection. Special soot-blowing equipment shall be furnished as follows: Local pushbuttons shall be for outdoor service and combination motor starters and selectromatic control panel for automatic sequential operation shall be for indoor service. SOOT-BLOWERS (Cont d) WAD00095 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August 14, 1959 14 Steam washer or scrubber shall be provided in steam drum of boiler with separators, driers, baffles, hoods, internal feed piping and sampling connections designed to limit the total solids carryover in the steam to 1 ppm. Arrangement and fabrication of this internal equipment shall be designed to permit removal and replacement through manhole. Drum shall be shipped with internals fully installed. 15 Water column equipment shall not be provided. One gauge glass, Diamond Bi-Color with 15 in. vision, with solid tie bars, shall be furnished, for one end of steam drum. One gauge glass, Yarnall-Waring gauge 4190, including Type M illuminator with a mercury vapor lamp shall be furnished on the other end of steam drum. In addition, each side of steam drum shall be connected to a remote level indicator and recorder furnished by Purchaser. All water gauges and instruments shall include internal illumination and necessary shut-off valves. Chain on gauge glass valves shall extend to first platform below steam drum for operation. No vision ducts, mirrors, or floor stands are required. Gauge glass on ri^it side of boiler shall be arranged so as to be suitable for installation of television set. Adequate platform space shall be provided for installation of the television equipment. STEAM WASHER WATER COLUMNS 20 WAD00096 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August 14, 1959 16 Furnace-vail cooling shall consist of surface arranged as , . Final Drawing,,9029F shovn by Seller s drawing No. P5-2558-l6xD and as scheduled hereinbelov. (Only those tubes exposed to radiant heat of furnace and unscreened by having other tubes between them and furnace shall be considered as contributing to furnacewall cooling. Method of computing cooling area shall be as set forth in note below.) FURNACE-WALL CONSTRUCTION .1 Furnace-cooling tubes, as scheduled below, shall be 2-31/32 in. od .200 in. wall thickness, Specifi cation ASME SA-210 Type carbon steel for working pressure of 1725 psig, unless otherwise noted: Location Front Front Side (2) Platten Roof Rear Division Type of Tube and Surface Bare Bare Bare Full & Flat Stud Bare Bare Number of Tubes 160 198 182 80 158 101 Spacing 3" 3" 3" 6" 3" 3" Total Linear Ft 90 90 67 25 105 90 Sq Ft Heating Surf* 2949 4800 6700 1012 2420 4544 Total 23,946 a Bare tubes spaced to afford substantially tangent contact with each other are based on projected area. Surface of floor tubes in pulverized-fuel furnaces to be included down into ash discharge hopper or sluice way to point where such tubes become vertical or tangent to a vertical plane. *Note-Heating surface comprising furnace-cooling areas, if made up of bare tubes or tubes with block or chrome cement facing, shall be computed as follows: - 21 - WAD00097 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 b Bare tubes spaced 1-1/2 diameters or more apart and backed by refractory: external surface area per foot of length times total linear feet. c Bare tubes so arranged that gases pass transversely across tubes (as in front bank of boiler tubes): computed as under (b). d Tubes with metal block facing or faced with chrome or cement: computed as under (b). .2 Water-wall headers, as scheduled below, shall be designed for working pressure of 1725 psig. Material shall be of Specification ASME SA-106b for lower headers and upper headers. Header Lower Side Cnnv Pass Upper Side Lower Front Upper Front Lower Rear Lower Div. Wall Upper Div. Wall Shape of Section Round Round Round Round Round Round Round Round Size l4" 0D ll-3/4"OD l4" 0D l4" 0D 14" 0D 14" 0D 14" 0D l4" 0D Thicknes; 1-7/8 1-1/2 1-7/8 1-7/8 1-7/8 1-7/8 1-7/8 FURNACE-WALL CONSTRUCTION (Cont'd) Handhole covers shall be removable through each individual handhole opening, located to be readily accessible from outside of boiler setting. 17 Superheater shall consist of 39,306 sq ft of heating surface and of continuous tube, drainable type. Steam temperature control shall be provided by means of proportioning dampers and gas recirculation. Emergency control shall be by means of spray desuperheater between the primary outlet and second ary inlet. The set point at which the spray will begin to operate is 1005 F Steam Temp .1 Superheater tubes as listed below shall be designed for working pressure of 1725 psig. - 22 - SUPERHEATER WAD00098 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August 14, 1959 Size Section Inches OD Thickness ASME Spec Primary 2-1/4 .18 CR 1/2 2-1/4 .22 SA-210 2-1/4 .20 SA-210 2-1/4 .18 SA-210 2-1/2 .18 SA-210 Row 1-4 5-8 9-14 15-28 29-56 SUPERHEATER (Cont'd) Secondary 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 .20 CR 1/2 1-3 .22 CR 1/2 4-6 .23 CR 1/2 7-8 .22 CR 1-1/4 9-10 .24 CR 1-1/4 11-12 .28 CR 1-1/4 13-14 33 3M 15-16 35 3M 17 51 CR 5 18 .42 3M 19-20 33 3M 20A .2 Maximum tube skin temperature that will obtain at 852 000 lb per hr steam output shall not exceed; Specification CR 5 3M CR 1-1/4 CR 1/2 Temp Control In Operation 1150 1125 1050 975 Temp Control Not in Operation 1150 1123 1050 975 Superheater headers shall be as listed below; Section Size Thickness Specification ASME Primary Inlet 14" OD 1-3/8 SA-106B Primary Outlet 14-1/2" OD 1-7/16 Secondary Inlet 15" OD 1-9/16 SA-335-P-H SA-lOoC Secondary Outlet 19" OD 2-5/8 * SA-335P-11 - 23 WAD00099 SPECIFICATION EBASCO STEAM -GENERATING UNIT AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August 14, 1959 .4 Superheater headers shall be provided with openings as required for inspection purposes. All openings shall be closed by means of welded caps. 18 Reheater shall consist of 30*120 sq ft of heating surface and of continuous tube, drainable type. Steam temperature control shall be provided by means of proportioning dampers and gas recirculation. Emergency control shall be by means of spray desuperheater in the reheat inlet header. .1 Reheater tubes, designed for working pressure of 480 psig shall be as follows: Reheat Superheater Row 1-3 4-6 7-9 10-15 16-21 22-24 25-27 28-30 31-60 Thickness 23 15 .12 .11 .11 15 .13 .11 .11 Size OD 2-1/4 2-1/4 2-1/4 2-1/4 2-1/4 2-1/4 2-1/4 2-1/4 2-1/2 Material CR 5 CR 2-1/4 CR 1-1/4 CR 1-1/4 CR 1/2 SA-210 SA-210 SA-210 SA-210 * Welding detail to be similar to Purchaser's weld end details, which are based on latest Pipe Fabrication Institute standards. .2 Reheater headers shall be as follows: Section Size Thickness Specification ASME Inlet 16-1/2" OD 7/8 SA 106b Outlet 19-1/4" OD 1-13/16 SA-335P-11 SUPERHEATER (Cont'd) REHEATER - 24 - WAD00100 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 3 Maximum tube skin temperature expected at 852 000 lb per hour steam output shall not exceed: Section RH Temp Control Temp Control In Operation Not In Operation 1150 1130 REHEATER (Cont'd) The complete steam temperature control system shall consist of three elements, namely, gas recirculation, dampers and spray desuperheaters (emergency use only). Remote indicators for damper and desuperheater valve position will be fur nished by Purchaser. The gas recirculation feature provides increased volumes of gas flow through the unit at lower loads, by means of fans which take suction from the discharge of the Induced Draft Fans and inject gas into the furnace, near the top. The dampers automatically bypass and pro portion gas flow through the secondary and primary super heater and reheater sections. The spray desuperheaters feature provides for water injection in both the superheater and reheater. In the superheater the spray will be located between the primary outlet and the secondary inlet. In the reheater the spray will be located ahead of the reheater inlet on the boiler in Purchaser's piping. Normally the sources of spray water will be boiler feed discharge for superheater and No. 1 high pressure 4th stage extraction feed water heater shell drains for reheater. Alternate source for reheater will be boiler feed discharge. STEAM TEMPERATURE CONTROL Spray service - the valves for the reheater desuperheater must be capable of taking water from either source and re ducing its pressure and also must be capable of automatically shifting from low to high pressure source when spray is required and high pressure heater drains are no longer available. - 25 - WAD00101 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Approximate pressures and temperatures of spray water are as follows: Superheater Spray Reheater Spray H P Heater No. 1 In Service 1950 psig - 260 F at full load Pressure increases 10 psi for each 50,000 lb/hr reduction in feed water flow. Shut-off head on boiler feed water system is 2045 psig. 6l0 psig - 450 F at full load Pressure varies directly with load. STEAM TEMPERATURE CONTROL (Cont'd) H P Heater No. 1 Out of Service 1950 psig - 260 F at full load Pressure increases 10 psi for each 50,000 lb/hr reduction in feed water flow. Shut-off head on boiler feed water system is 2045 psig. 1950 psig - 260 F at full load Pressure increases 10 psig for each 50,000 lb/hr reduction in feed water flow. Shut-off head on boiler feed water system is 2045 psig. The basic control of steam temperature over the range from 650 000 to 852 000 lb/hr of steam will be by gas recirculation. The surfaces in the unit are proportioned so that at 852 000 lb/hr of steam no gas recirculation will be required. At 650 000 lb/hr of steam the quantity of gas recirculated for lignite or gas will be approximately the same. At 852 000 lb/hr of steam it is probable that a small quantity of spray desuperheating will be required, but under normal conditions this will be only in the superheater, since the proportioning dampers will control the reheater outlet tempera ture at the desired level. Under emergency conditions, such as with top high pressure extraction feed water heater out of service, full capacity can be obtained by the use of spray desuperheating in the superheater and reheater. Dampers shall be fabricated of material suitable for temperatures encountered. .1 Control shall be designed as specified below: a Control range, superheated steam output (either fuel) 650 000 to 852 000 lb/hr b Maximum gas temperature leaving economizer (primary fuel) 664 F c Final superheated and re heated steam temperatures 1005 F - 26 - WAD00102 SPECIFICATION EBASCO . STEAM-GENERATING UNIT AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August 14, 1959 2 Dampers shall be adapted for automatic control to be furnished by Seller. Dampers shall be constructed of Steel . Torque required Varies ft/lb per damper. (Seedrawings) 3 Steam-temperature controller-recorder shall be furnished by Seller and shall be of Bailey Meter Co manufacture, arranged for panel mounting, internally illuminated and provided with standard mounting. Controller shall be provided with remote pushbutton station and damperposition indicator for mounting on BTG Control Board. 4 Controls and instruments furnished by Seller shall also include the following: 2-WM55A Model E-101, Class QOPA Bailey Meter SH Steam Temp. Recorder-Controller with Resist Element Protecting Well, Connecting Head & Ext Nipple. 1-WM55A Model E-101 Class QOPA Bailey Superheater Temperature Recorder-Controller with Resist Element Protecting Well & Conn. Head as follows: To - Record Final Superheat Steam Temperature. Estab lish Superheat Steam Temperature Pneumatic Signal 1-Class AP Bailey Boiler Load Index Controller (Steam Flow) for installation in the Steam Flow Meter to be furnished by the Purchaser. 1-CE35T Class 1AP16QX Gas Temperature times Totalized Mass Gas Flow Recorder-Controller (two cases), as follows: To - Measure and totalize Mass Gas Flow compensated for Flue Gas Temperature variations Establish Gas Temperature times Totalized Mass Gas Flow Control Pneumatic Signal 1-WM55A Model E-101 Class QOPA Bailey Reheat Steam Temperature Recorder-Controller with Resist Element, Protecting Well, Conn. Head & Ext. Nipple, as follows: To - Record Reheat Steam Temperature. 1-KM55A, Model E101 Class 8800 Bailey Meter Recorder To - Record Final SH Steam Temp. & Reheat Steam Temp. 1-Set of required Bailey Mini-Line Control Accessories 1-Set of required Bailey Mini-Line Selector Valves 2-AS2100 Bailey Mini-Line Superheat Desuperheating Water Flow Manual Loaders STEAM TEMPERATURE CONTROL (Cont'd) - 27 - WAD00103 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser1s Identification Spec. Bo. PSCC-C2-102-SG October 1, 1958 ReV 1 " Au8ust ^ 1959 2-YWFS Class 9B Superheat Desuperheating Water Flow Control Valve 1-YWFS Class 9B Superheat Desuperheating Water Flow Shut-off Valve STEAM TEMPERATURE CONTROL (Cont'd) 1-AC68P Model 300 Bailey Recirculating Gas Flow Damper Control Drives 1- AC816P Model 300 Bailey Fan Shut-off Damper Control Drives 2- AC816P-300 Bailey Gas Distribution Damper Control Drives 2-AS2100 Bailey Mini-Line Reheat Desuperheating Water Flow Manual Loaders 2-YWFS Class 9B Bailey Reheat Desuperheating Water Flow Valves 1- Bailey 30 CFM Air Filter and Pressure Reducing Valve Set, unassembled, complete with piping 2- YWFS Class 9B Bailey Meter Reheat Spray Desuperheater Water Flow Shut-off Valves, one High Pressure & one Low Pressure 1-YWFS Class 9B Bailey Meter Reheat Desuperheating Water Flow Valves Other features of design shall be as described below: Provisions for sprays, as mutually agreed upon, will be included. The spray equipment shall be designed to handle water from two sources and at various pressures, as specified in Section 20. Equipment shall be Bailey Meter Co manu facture, arranged to automatically operate at a predetermined steam temperature, to inject water into the superheater and reheater to maintain final steam temperatures at 1005 F. Spray valves shall be operated by Air Pressure AH tube joints for water and steam to drums or headers shall be welded. Rolled joints will not be used. Weld end preparation shall be of the steel backing ring design. Ceramic backing rings to be used in high heat input zone near burners approximately (30 ft). Economizer shall consist of 19,823 sq ft of heating surface and shall be of the continuous tube type. .1 Construction features shall be as follows: a Type of tubes Seamless b Number of tubes wide - 28 - 120 TUBE JOINTS ECONOMIZER WAD00104 SPECIFICATION EBASCO STEAM-GENERATING UNIT AND ACCESSORIES Purchaser's Identif1! cation Spec. No. PSCC-C2-102-SG October 1, 1958 c Number of tubes high d Horizontal spacing e Vertical spacing f Tubes Material Diameter, outside Thickness Length Design pressure g Baffling material SA-210 Enco 19 4 in. 3 in. 2-1/2 in. .180 in. lU'-Cin. 1800 psig .2 Hinged doors shall be provided for inspection and main tenance. For outdoor service, casing shall be weather proofed with metal-clad insulation. 3 Feed water inlet connection shall be 10 in Sch 120 ECONOMIZER (Cont'd) Airheater shall be of tubular type, with 1 gas pass and encased in gas tight insulated steel casing. .1 Construction features shall be as follows: a Tube material welded elements High Temp Sect Low Temp Sect b Tube size c Tube thickness 2 l4 ga in. in. 3 11 ga in. in. d Tube effective length 39 ft 11 ft e Number of tubes f Heating surface 11,775 2k0 000 sq ft 4,785 41,330 sq ft g Total heating surface 281,330 sq ft h Tube sheet material steel AIRHEATER - 29 - WAD00105 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 i Tube sheet thickness)Lower 1-1/4 )Upper 3/4 3/4 1-1/4 in. j Number of air passes 4 3 Doors shall be provided for inspection and maintenance. .4 Arrangements to bypass airheater shall not be provided, on either air or gas side. 5 Cleaning device shall be furnished by Seller consisting of 2 Model THE electric motor driven, traveling frame soot blowing airheater cleaners, complete with motors and controls. This cleaning system is amplified in Section l4. AIRHEATER (Cont'd) Pushbutton stations shall be for outdoor service. Motor starters shall be combination type with overload protection, for indoor service. Motors shall be in accordance with Ebasco Specification MX-2, revised Nov. 22, 1954, motors for General Service, one copy of which is attached and forms a part of this specification. .6 Proper insulation, if not already incorporated by air heater manufacturer, shall be applied in accordance with procedures recommended by insulation manufacturer. Outer covering shall consist of No. 20 U S Standard gauge black iron lagging, attached securely with sheet metal screws, and with joints locked or otherwise arranged to provide weatherproof covering. Steam coils for preheating forced draft fan discharge air shall be of non-freeze type, manufactured by Westinghouse Electric Corp. Coils shall be designed to maintain air heater cold end temperature above the dew point over the full range of operation, on the basis of -20F ambient outdoor air temperature and a sulphur content of 2 per cent in the fuel being burned. All control valves for coil steam supply and drain will be furnished by Purchaser. .1 Designation HDC-35 x 120 x 1 .2 Number of sections 14 3 Type surface Finned .4 Nominal tube length 10 ft 0 in. 5 Position of tubes . 6 Material of tubes and fins Vertical Copper .7 Material of headers Steel AIRHEATER STEAM C0H5 - 30 - WAD00106 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 .8 Tube design pressure 250 psig 9 Tube design temperature .10 Steam supply to tubes 500 F Normal Bleed steam at 38-9 psia & 265-6F; pressure varies directly with load. Alternate Saturated Steam at 10 psig and 365 F 24 Coal-burning equipment shall include twelve multi-tip vertical intertube type pulverized coal burners, each capable of burning 8340 to 10,230 lb per hour of coal of characteristics specified in paragraph 6. .1 Design of coal burners shall be such as to permit the use of primary air as a small part of total air required, to insure stability of ignition, and to afford control of length and shape of flame. 25 Four No. 550 duplex coal pulverizer mills, manufactured by Riley Stoker Corp, will be furnished by Purchaser. The predicted performance of the mills, in regard to amount and temperature of primary air required, mill discharge temperature, etc, is given below. CONSTANT TOTAL MOISTURE OF 24 PER CENT (INCLUDING CONSTANT SURFACE MOISTURE OF 6 PER CENT) IN COAL ENTERING MILL Low range of superheat and reheat temperature control-steaming rate = 650 000 #/hr Maximum continuous load-steaming rate = 852 000 fi/hr No. of mills operating if/hr coal to each mill jf/hr primary air required by each mill Temp primary air required at mill-F Temp of coal-air mixture leaving mill-F(from Riley predicted perform ance curves) 4 25,250 53,000 534 184 3 33,667 52,000 535 168 43 30,675 38,000 52,500 50,000 535 535 174 160 - 31 - AIRHEATER STEAM COILS (Cont'd) PULVERIZED COAL BURNERS PRIMARY AIR DATA WAD00107 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Low range of superheat and reheat temperature control-steaming rate = 650 000 #/hr Maximum continuous load-steaming rate = 852 000 /hr Total moisture evaporated-per cent (from Rileypredicted per formance curves) 13.4 9*8 11.1 8.0 Moisture in coal- 10.6 air mixture leaving mill-per cent 14.2 12.9 16.0 Coal to Mill, #/hr PULVERIZER DISCH TEMP VS FEED RATE WITH VARYING SURFACE MOISTURE- 18 PER CENT CONSTANT INHERENT MOISTURE - PRIMARY AIR TEMP 935 F 25,250~" 30,675----- 33,667 38,000 Surface Moisture, Per Cent Approx Disch Temp, F 7 175 165 160 155 8 165 160 155 150 9 155 150 145 - 10 150 145 l4o - 11 145 l4o -- Primary air pressure at the boiler manufacturer's work termination point in the ducting will be 4.0 in ^0. 26 Burners shall be of Babcock & Wilcox Co, manufacturer for burning natural gas. Twelve required for each boiler, in cluding windbox. .1 Performance, based on conditions as given in paragraph 5, s hall be as follows: PRIMARY AIR DATA (Cont'd) GAS BURNERS a Capacity, total 1,24-0 Mcf/hr b Maximum pressure 7-5 psig c Minimum pressure 1.0 psig d Range, each burner 83,800 CFH & 103,200 CFH without changing tips - 32 - WAD00108 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 .2 Construction features shall be as follows: GAS BURNERS a Type of gas burners Multi-tip vertical intertube (Cont'd) b Arrangement of burners Two rows of six each c Windbox, size To suit d Windbox, thickness place 3/l6 in. e Windbox, insulation 3" Thermobestos, applied internally, and No. 20 U S S gauge black iron lagging 3 Starting shall be accomplished by means of lighting off torches using natural gas fuel. A maximum fuel quantity ** of 31o0 cu ft per hr shall be required at 2.5 psig maxi mum at lighter. .4 Minimum stable pressure -75 psig 5 .6 Gas piping from burner connection shall include flexible metallic piping. Purchaser's piping will be anchored to boiler steel. 27 A remote manual gas ignition system shall be furnished, as follows: IGNITION SYSTEM .1 Number of torches 12 .2 Required input to furnace by each torch to maintain stable ligniteflame 3180 cfh* 3 Capacity each torch 3180 cfh* .4 Maximum gas pressure 2.5 psig* 5 Minimum stable gas pressure 7-5 psig* .6 Accessories: transformers, pushbuttons, contactors, high voltage cable, spark plugs, solenoid operated diaphragm actuated shut-off and vent valves, strainers, pressure switch and pipe hangers. Contactors and solenoid valves operate on 115 volt, 60 cycle a-c. Ignition transformers are 60 cycle a-c, with 115 volt primary and 10 000 volt secondary. * Calculated at atmospheric pressure at 5130 ft elevation above sea level. - 33 - WAD00109 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 7 Torches shall be arranged in groups of three to serve one complete mill. Each group shall have one main solenoid pilot valve to function one air operated shutoff valve and one air operated vent valve. IGNITION SYSTEM (Cont'd) Dust separator shall be the mechanical, multi-tubular, Design 512RWS12Wx5-l/3 H (3 x 13) 2496 type, manufactured by The Aerotec Corp. .1 Unit shall be enclosed in a shell of 3/l6 in., steel plate reinforced to withstand a maximum negative pressure of 16.0 in. of water. .2 Tube size and material 5 in. ID, white cast iron. .3 When operating at the maximum continuous steam load of 852 000 lb per hr, unit shall be capable of handling 1,282,000 lb of gas per hour at an inlet gas tempera ture of 305 F with guaranteed performance as follows: a Collection efficiency shall be 87.4$ based on a typical dust having the following analysis: DUST SEPARATOR Particle Size, Microns Average Particle Size, Microns Amount in Gas Stream, Per Cent + 60 - 60 + 40 - 4o + 30 - 30 + 20 - 20 + 15 - 15 + 10 - 10 + 7-5 - 7-5 60 50 35 25 17-5 12.5 8-75 3-75 3 5 6 13 11 20 12 30 b Draft loss not to exceed 3-0 in. of water. .3 When operating under the conditions as specified in paragraph .2 above, expected dust concentration shall be as follows: a At inlet to separator4.l4 lb dust per 1000 lb gas b At outlet from separator per 1000 lb gas .52 lb dust - 34 - WAD00110 t&s&Ajc/CArs Qf-f'je, iAAbcfcto*^) SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 .4 Separator shall be provided with four 3/l6 in* steel plate dust hoppers. Each hopper outlet shall be flanged and drilled for connection to Purchaser's ash disposal system. Hoppers shall have a total storage capacity of 1764 cu ft, equivalent to approximately 15 hours operation at full- load 5 All hoppers shall be provided with one 15 in. by 13 in. insulated cast iron door. .6 Supports shall be furnished by Babcock & Wilcox Co 7 Unit shall be insulated with 1" 85 per cent magnesia and No. 18 U S S gauge black iron lagging. .8- Seller shall incorporate into the design of the dust separator, with the approval of the Purchaser, a sufficient number of test instrument connectionsproperly sized and located in order to test the efficiency of the unit in accordance with the ASME "Test Code for Dust Separating Apparatus," dated December 1941, or latest revision thereof. 29 .1 Boiler unit shall be installed outdoors; firing aisle and ends of steam drum shall be housed and top pro tection from weather shall consist of roof constructed of Flexicore Roof Slabs furnished by Seller. Casing design and details shall be suitable for exposure as determined by conditions of installation specified hereinbefore. .2 Steam generator shall be furnished with an insulated steel-encased setting completely enclosing unit of outdoor construction. Refractories and insulation shall be furnished in accordance with subjoined general description. a Furnace side and front walls - 1" K-20, and 2-1/2" 85 per cent magnesia. b Furnace roof and rear wall - 1" K-20. c At burners - 1" K-20 & PCO in full stud area. d Side walls, connection section - 1" K-20, and 2-1/2" 85 per cent magnesia. e Rear walls, connection section - 1" C Tile, 2" K-20 and 6-1/2" med temperature block. f Furnace hoppers - 1" K-20. DUST SEPARATOR (Cont'd) SETTING - 35 - WAD00112 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 g Furnace hopper closure - 2-1/2" Mineral wool blanket h Steam drum - 3~l/2" M T Block i Flue, boiler to airheater - 1-1/2" M T Block - 2" M T Block j Induced draft and gas recirculation fains, dust collector, recirculation flue and flues from airheater to dust collector and from dust collector to induced draft fan - 1" 85 per cent magnesia k Hot air ducts - 3" med temp block 1 Spray desuperheater piping - 2-1/2" high temperature block, 2" 85 per cent magnesia and Flexstone coating m Saturated steam piping connections - 3" med temp and Flexstone coating n Pulverized coal burner approach piping insulated by Purchaser o Insulated pipe enclosure - 3" mineral wool blanket 3 All flat surfaces of setting shall be enclosed in sub stantially air-tight paneled steel casing of 0.l4l in. (No. 10 U S S gauge) steel, to be flanged and welded at joints. Reinforcing buckstays shall be furnished to assure rigidity under all conditions of operation. Flanged panel joints shall be made air-tight through the use of air seal cement and method of bolting panels together. All doors in setting shall be air-tight. Horizontal surfaces shall be crowned to insure drainage. 4 All joints between pressure parts and steel casing shall be made tight by means of suitable seals SETTING (Cont'd) 5 Where drum ends protrude from casing a seal ring shall be used to permit free longitudinal and lateral movement of drum. All external areas of drums shall be insulated and enclosed in formed steel casing. 6 Tile and insulation shall be supported from tubes, headers or pipe as applicable. Type of materials, thicknesses and other details of in sulation of casing shall be as shown on Seller's Insulation & Refractory Drawings. - 36 - WAD00113 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 7 All refractories shall comply with "Specification for Refractories for Heavy Duty Stationary Boiler Service," ASTM C64-49 or latest revision. All standard fire brick shall be manufactured by Denver Fire Clay Co- .8 Asbestos rope packing shall be used where expansion joints are required in setting. 9 All setting insulation material shall be as manufactured by Construction Special ties Company____ _________ __ __________ SETTING (Cont'd) .10 All setting doors called for in setting drawings shall be fitted with insulation and/or refractory lining where required and shall be made tight by means of gaskets or otherwise, in order to minimize gas leakage. .11 All baffles shall be constructed as shown on Seller's Drawing No. P5-29528-16X0. (Final Dwg 9029 F) .12 Insulation on piping shall be governed by Ebasco insula tion specification. If possible, Seller shall use con struction similar to other plant piping systems. Forced-draft fan, 2 required, shall be of Westinghouse Electric FORCED-DRAFT Coro, (sturtevant Division) manufacture, driven by General FAN Electric Company, 1200 rpm motor, furnished by Purchaser. .1 Performance and conditions shall be as follows: Fuel Gas Coal Air ratio 13io Excess 26.5 Excess Test Block Steam output 852 000 852 000 1 LTV O --1 1 Air temperature 80 80 1 Air delivered 126 000 142 000 i64 000 462 500 515 000 592 000 Static pressure, at inlet 0.0 0.0 0.0 Static pressure, at outlet 10.2 12.6 16.6 lb/hr F cfm lb/hr in. water in. water - 37 - WAD00114 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Margin Capacity _ _ 15 Head - - 32 Power required 400 550 Fan inertia 8360 8360 8360 Fan speed 1180 1180 1180 Efficiency 77-5 79.8* 80 Motor rating _ - 600 .2 Construction features shall be as given below: * * bhp lb : rpm f hp Type Housing, type Connection Damper, type Dampers, Number Bearings Controls Materials Housing Impellers Shaft Centrifugal, Turbo-Vane, Backwardly Inclined Blades, No. 125 TV-10 Double width, double inlet Flexible coupling (Fast) with guard Design 8 inlet vanes and outlet dampers - type 2 Self-aligning sleeve bearings, air cooled Controls on inlet vanes and outlet dampers Steel welded 3/l6" Steel 1/4" SAE 950 Steel SAE 104s FORCED-DRAFT FAN (Cont'd) Weight 21,400lb Torque required 2450 ft lb/fan @ ll80 rpm 3 Inlet vanes or dampers shall be arranged for operation by a single power unit, which shall be assembled and demon strate its capability for closing off air completely. Torque required is 450 ft lb per fan. Maximum efficiency point - 38 - WAD00115 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC C2-102-SG October 1, 1958 Rev 1 - August 14, 1959 .4 Special features: Fans furnished with cleanout doors, inlet flares, inlet screens and motor half couplings. Motors, 2 required, for forced-draft fan shall be of Westinghouse Electric Corp (Sturtevant Div.) manu facture, furnished by Purchaser, indoor drip-proof type, each 600 hp, 1200 rpm, 3 phase, 60 cycle, 4000 /olt. FORCED-DRAFT FAN (Cont'd) 31 Induced-draft fan, 2 required, shall be of Westinghouse Electric Corp (Sturtevant Division).-manufacture, driven by General Electric Company 1,250 hp, 900 rpm motor, furnished by Purchaser. .1 Performance and conditions shall be as follows: INDUCED-DRAFT FAN Fuel Air ratio Steam output Gas temperature Gas delivered Gas 13# Excess 852 000 310 259 000 Coal 26.5# Excess Test Block 852 000 - lb/hr 355 263 000 355 304 000 F cfm 640 000 616 000 710 000 lb/hr Static pressure, at inlet Static pressure, at outlet - 12.8 0.0 - 13.5 0.0 - 17-8 xn. water 0.0 in. water Margin Capacity 15 Head - - 32 * Power required Fan inertia _ - 1,250 hp lb ft sq Fan speed 880 880 880 rpm Efficiency 77.4 77.6* 76 # Motor rating - 1250 hp .2 Construction features shall be as given below: Type Centrifugal, Turbo-Vane, Backwardly Inclined Housing, type Connection Blades, No. TV-10 2/3 Double width, double inlet Flexible coupling (Fast) with guard * Maximum efficiency point. - 39 - WAD00116 Purchaser's Identification Spec No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Dampers, type Dampers, Number Bearings Control Materials Housing Impellers Blade liners Shaft Scroll liners Inlet and outlet dampers - type 4 Self-aligning sleeve bearings, air cooled Control on inlet and outlet dampers 3/16 Steel SAE-1015 1/4 Steel SAE-950 Steel SAE-950 Steel SAE-104S Steel SAE INDUCED DRAFT FAN (Cont'd) Weight 32, 500lb Torque required at 880 rpm 6,650 ft lb/fan 3 Inlet dampers or louvers and outlet dampers shall be arranged for operation by a sirgle power unit. Torque required is 865 ft lb per fan. .4 Special features: Fans furnished with inlet boxes, clean out doors, blade liners, 3/8" steel scroll liners, insu lation studs and motor half couplings. .5 Motors, 2 required, for induced-draft fan shall be of General Electric Company manufacture, constant speed, each 1250 hp, 900 rpm, 3 phase, 60 cycle, 4000 volt and shall be furnished by Purchaser. .6 The Induced-Draft Fan shall, be designed with an allowance of 0-5 in. H^O in head for future Electrical Dust Collector. Gas recirculation fan, 1 required, shall be of Westinghouse Electric Corp (Sturtevant Division) manufacture, driven by General Electric Company, 300 hp, 900 rpm motor, furnished by Purchaser. 1 Performance and conditions shall be as follows: Maximum Recirc Test Block Gas Temperature 355 355 F Gas delivered 173 000 199 500cfm 40 5 000 - 466 000 lb/hr GAS RECIECUIATION FAN WAD00117 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Maximum Recirc. Test Block Static pressure at inlet a0 a0 in. wa+ter Static pressure at outlet 5-0 6.6 in. water Margin Capacity Head 15 1o 32 $ Power required Fan inertia 309 307 hp lb ft sq Fan speed 880 880 rpm Efficiency 76.5* 68 % Motor rating 300 hp 2 Construction features shall be as given below Type Centrifugal, Turbo-Vane Backwardly Inclined Blades No. TV-10 Housing, type Single width, single inlet Connection Flexible coupling, (Fast) with guard Dampers, type Outlet dampers - type Dampers, Number Bearings 1_________________ Self-aligning sleeve bearings, air cooled Control Controls on outlet dampers Materials Housing 3/16" Steel SAE-101S Impellers 5/16" Steel SAE-95O Blade Liners Shaft Steel SAE-104S Scroll Liners Steel GAS RECIRCULATION FAN (' Cont'd)' Weight Torque required Maximum efficiency point 16 000 I85O ft lb/fan @ 880 rpm - kl _ lb WAD00118 SPECIFICATION EBASCO steam-generating UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August 14, 1959 3 Inlet dampers or louvers and outlet dampers shall be arranged for operation by a single power unit. Torque required is 285 ft lb per fan. .4 Special features: Fans shall be furnished with inlet boxes, blade liners, l/2" steel scroll liners, insula tion studs and motor half couplings. 5 Motor for gas recirculation fan shall be of Westinghouse Electric Corp (Sturtevant Div) manufacture, constant speed, 300 hp, 900 rpm, 3 phase, 60 cycle, 4l60 volt, and shall be furnished by Purchaser. GAS RECIRCULATION FAN (Cont'd) System of duct work shall be furnished of subjoined general description; arranr^pit details shall be in accordance with Babcock & Wilcc Flue and Duct Drawings DUCT WORK .1 Ducts shall be designed for pressures given below: a Cool-air l6 ^ ;n. water pos b Hot-air l6-6 _n. water pos c Gas to economizer 9.0 in. water neg d Gas from economizer to ID fan 11.0 in. water neg Note: Where provision is made for future installation of dust separator equipment, duct design shall be based upon the negative pressure which will then prevail. .2 All ducts shall be stiffened and reinforced to withstand positive and negative pressures indicated. Top of ducts shall be crowned to insure drainage. Velocities shall not exceed 3000 fpm at the maximum continuous boiler capacity equal to 852 000 lb snearn per hour. 3 Shut-off dampers, Automatic type regulating dampers and expansion joints shall be furnished as required. Except for access, duct joints will be welded. .4 All duct work shall be insulated with 85$ magnesia block insulation, over appropriate layer of med temperature insulation where necessary. Outer covering on boiler breeching is to consist of No. 18 U S S gauge black iron sheet metal attached securely with sheet metal screws, and with joints locked or otherwise arranged to provide a - 42 - WAD00119 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 weatherproof covering. Necessaiy stop angles or plates are to be furnished for insulation adjacent to the breeching support structure and access doors. 5 Heat insulation shall be applied to outside of ducts carrying gas and ducts carrying hot air. Structural system shall be in general according to Babcock & Wilcox Co Drawing Nos. P5-29528-16X0 and will be com pletely erected on Purchaser's foundations by Purchaser. Structural steel and structural system shall conform to the following requirements. Design shall be entirely substantial and adequate to take load of all piping in connection with boiler supplied by Purchaser. .1 Walkways and stairways shall be provided for access to all parts of steam generator required for operation, inspection and maintenance including the following: a Airheater access platform b Superheater platforms, each side c Main-steam-drum platform, each side d Intermediate platforms, each side, two or more required e Safety valve platform .2 Due regard to safety of operation shall be incorporated in design of all structural and supporting steel. 3 No field welding shall be allowed unless specifically approved by Purchaser. .4 No members shall be designed having rivets in tension, unless approved by Purchaser. 5 Working points on trusses, beams, bracing and columns should be concentric. .6 Leveling bolts and nuts shall be provided for all column base plates. .7 No shear plates or shims on column bases will be permitted. .8 Holes for pipe hanger supports shall be shop punched whenever possible. DUCT WORK (Cont'd) STRUCTURAL AND SUPPORT ING STEEL - 43 - WAD00120 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 9 Curb plates and angles shall be furnished and fabricated with the main steel. Field drilling and welding shall be eliminated wherever possible. 10 13/l6" Diameter holes shall be provided in both flanges of all columns in groups of six holes above each platform (on outboard side of columns only) approximately 12" on center, bottom hole approxi mately 3" up from platform level and two holes below each platform approximately 1' below steel. 11 No diagonal brackets for supporting platforms will be permitted. 12 Structural steel for steam-generating unit shall be designed with no increase in allowable unit stresses due to wind loads. 13 Design shall be entirely substantial and adequate to take load of all piping in connection with boiler supplied by Purchaser, in addition to vertical gravity loads imposed at connections to Purchaser's station building, elevator structure and louvered fan en closure plus horizontal wind loads delivered from the station building to the boiler structure, generally in a fore-aft direction. 14 All drawings and tracings made by the Seller for the execution of his work shall remain his property except the Purchaser shall have the right to use prints of Seller's design drawings, shop detail drawings and bills of materials for subsequent work or any other work not covered by these specifications. 15 In addition to shop detail drawings, Seller shall prepare erection plans which shall show location and erection mark of each member. He shall prepare bills of materials giving number, erection mark and total weight of each assembled member subdivided to show number, size, length, weight and assembly mark of each component part and rivets, bolts and weld metal making up member. 16 Certified copies of foundry test reports showing characteristics of material in castings shall be fur nished to Purchaser. 17 Seller shall make proper arrangements with mills which will roll the material so that Purchaser's inspector may witness rolling of the material, chemical and - 44 - STRUCTURAL AND SUPPORT ING STEEL (Cont'd) WAD00121 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 physical tests, and have satisfactory opportunity, for thorough surface inspection and gauging of each piece of material after it comes from the mills and prior to loading. .18 Seller shall provide, without charge, facilities for Purchaser's inspector to inspect materials and work manship in Seller's shop. .19 When material is erected by other than Seller or his subcontractor and errors by Seller are encountered during erection, Purchaser will correct such errors at Seller's expense. The amount of such back charges, be cause of defective work, shell be limited to actual labor and material costs and rental charges for equip ment used specifically for correcting such defects. Design, fabrication and erection of all structural steel shall be in accordance with "American Standard Specifica tion for the Design, Fabrication and Erection of Structural Steel for Buildings," ASA A57-l> latest revision, except as noted below: Seller shall furnish Purchaser with copies of design drawings for structural steel framing and Purchaser's approval must be obtained before design is released for de tailing. Seller shall furnish f>urchaser with conies of erection drawings for main steel and Purchaser's approval must be obtained before details are reieaseu for fabrication. Seller shall furnish Purchaser with duplicate copies of mill orders for structural steel for the order and these copies shall be forwarded to Purchaser when originals are sent to mill. Certified copies of mill test reports of each melt of steel shall be furnished to Purchaser before any fabrication is started on the material covered by the report. Acceptance of the reports by Purchaser shall not constitute a final acceptance of the materials, the quality of which these tests are intended to indicate. All structural steel shall be of riveted construction unless welded construction is specifically agreed to in writing by Purchaser. STRUCTURAL AND SUPPORT ING STEEL (Cont'd) - 45 - WAD00122 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 All field connections shall be riveted, except that bolting will be allowed for girts and door and window framing. All welding, where approved, shall be in accordance with applicable American Welding Society Code. STRUCTURAL AND SUPPORT ING STEEL (Cont'd) Design wind load shall be 30 psf, unless otherwise specified. Structural steel preferably shall be arranged so that tem perature of steel is kept below 200 F. Columns shall be detailed to provide solid bearing at base plates and splices. Column base plates shall be designed with adequate provision for transferring horizontal shear to foundations. Walkways shall be not less than 3,-0" wide and stairs shall be not less than 2'-6" wide, except where interference of equipment makes this impracticable. Purchaser's approval of exceptions is required. Unless otherwise specified, all walkways and platforms shall be of rectangular, welded, non-reversible type grating with 3/l6" thick bearing bars spaced I-3/16 in. center to center and with cross bars spaced not more than 4- in. center to center. Walkways and platforms shall be designed for a live load of 100 lb per sq ft. Deflection of grating shall be limited to 1/500 span. Grating panels shall be removable. Each panel shall be anchored at each supporting member with two (2) anchoring devices. Each device shall consist of a welding stud bolt with hex nut and a steel clip. The stud bolt shall be l/4" diameter with ordered length equal to depth of grating, flux-filled, and shall be furnished complete with a hex nut. The clip shall be bent steel of 10 ga. thickness, 1" wide and U-shaped to fit between two adjacent bearing bars. The ends of the "U" shall be extended and bent over the top of the bearing bars and down the other sides. Depth of de pression shall be approximately 3/^" and depressed portion shall have a 5/16" hole. All bolts, nuts and clips shall be bonderized and painted, and shall be furnished by the grating supplier. - 46 - WAD00123 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Grating around columns, major equipment and pipes shall be neatly cut and banded in the shop with bars the same size as longitudinal bars. Banding shall be securely welded to longitudinal bars and there shall be one inch clear distance between banding and columns or equipment. Abrasive nosing shall be provided on grating at head of all stairs. STRUCTURAL AND SUPPORT ING STEEL (Cont'd) Stairs shall preferably have a slope of not more than 38 degrees from the horizontal and in no case shall slope exceed 42 degrees. Stair treads shall be grating treads with abrasive nosing. All grating and stair treads shall be bonderized and painted. Checkered plates shall be two way safety tread. Provide two 1-1/4 in. diameter lifting holes per plate. Each plate shall be fastened with l/2 in. diameter countersunk flat head bronze tap bolts spaced not more than 2T-6" on centers. A minimum of four bolts shall be provided. All handrailing for platforms and stairs shall be fabricated from 1-1/4 in. diameter black iron standard pipe with neatly finished welded joints. Corners shall be bent and not mitered. For horizontal runs intermediate rail shall be l'-lO" above floor level and top rail shall be 3'-4" above floor level. Rails for stair handrail shall be parallel to and located l'-5" and 2'-9" vertically from nosing line. Vertical posts shall be spaced not more than 6'-0" apart. Handrailing shall be fabricated in panels. Ladders shall be provided only where access is seldom required or where congestion makes it impossible to use stairs. Ladder side rails shall be 2 in. by 3/8 in. spaced 15 in. apart and rungs shall be 3A in. diameter solid rounds spaced 12 in. apart. Toe guards shall be provided at the edges of all platforms and at openings in platform larger than 12 in. in diameter. Toe guards shall be of steel at least l/4 in. thick and unless otherwise specified shall extend 5 in. above platform level or to conform to any applicable state or local codes. Curb plates and curb angles shall be neatly finished at corners and ends and shall be shop assembled and attached to supporting steel members wherever practicable. The Erector will furnish the temporary or fitting-up bolts. - 47 - WAD00124 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 The Erector will do the touch-up painting but the field painting shall be provided by Purchaser. Correction of minor misfits and a reasonable amount of reaming and cutting of excess stock from rivets shall be considered as a legitimate part of erection. Any error in shop work which prevents proper assembling and fittingup of STRUCTURAL STEEL by moderate use of drive pins and by a moderate amount of reaming and slight chipping or cutting, shall be immediately reported to Purchaser or his representative and approval of correction method obtained before proceeding. STRUCTURAL AND SUPPORT ING STEEL (Cont1d) Members shall be erected to a tolerance not exceeding 1 to 1000 with a maximum of 1 in. at the member centerline. A concrete brick lined stack for Units 1 and 2, 300 ft high above grade and l6 ft inside diameter at the top, will be furnished by Purchaser. 35 *1 Piping systems and manifolds shall be supplied for services listed below; if installation is outdoors, protection shall be provided against freezing. PIPING VALVES AND FITTINGS a All safety-valve relief systems, including drip pan elbows. Piping shall extend upward to an elevation 10 ft above the boiler steel, and shall terminate with 300 lb standard steel flanges to receive Pur chaser's mufflers of MM and M or equal design, furnished by B & W. b Power-control-valve relief system, including drip pan elbows. Piping shall extend upward to an ele vation 10 ft above the boiler steel, and shall terminate with a 300 lb standard steel flange to receive muffler of MM and M or equal design by B & W. c Boiler to blow-off valves. d Boiler to gauge glasses e Drains from gauge glasses to operating floor. *f Steam drum to sampling coil (steam sampling), g Steam drum to sampling coil (water sampling), h Superheated steam header to sampling coil. * Stainless steel tubing l/2" 0D x 0.095 in* wall thickness. - 48 - WAD00125 SPECIFICATION EBASCO STEAM-GENERATING UNITS AMD ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 i Economizer to boiler drum. j Soot blower piping system on boiler. Main lines will be brought together at a single point along side of boiler. This single point will be Pur chaser's connection. PIPING VALVES AND FITTINGS (Cont'd) 352 Miscellaneous valves Service______ No. Size Mfr's Designation a Feed valves Globe (angle) Check (lift) b Power-control shut-off 1 1 1 c Chemical feed stop d Gauge glass shut-off _1 _b_ f Steam gauge _4 g Blowdown Continuous (shut-off) I Continuous (regulating) _1 h Drain Superheater 4 4 Gauge glass _4_ Water walls 7 sets Economizer 1 set Reheater 2 Pressure seal, bonnet. 2 10" Edward 7517Y 10" Edward 7594Y 3"________ *Chapman (inlet end butt welded and outlet end flanged) 12_____ Powell 1771 SWE 1-1/2" 1"________ Vogt SW-1037 (lock type valve")" Edward9484 1-1/2" 1-1/2" Edward 948Y Hancock 7105 W 1-1/2" 1"_____ 1-1/2" 1-1/2" 1-1/2" 1-1/2" Edward 3924 Edward 948y Edward 944y Yarway 3981-3981 Yarway 3981-3981 Edward M-Si Edward 2224 - 49 - WAD00126 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev -1 - August l4, 1959 Service i Vent No. Size Mfr's Designation PIPING VALVES AND FITTINGS (Cont'd) Drum k 1-1/2" Edward 948y Superheater Reheater 3 Sampling Drum water 2 1" Edward 948y Drum steam 3 1" Edward 948Y steam steam k Fuel gas 12 4" Nordstrum 1 Soot blowing air main s hut-off 1 3" Edward 311y 353 Safety valves, as follows shall be furnished with mufflers. a Manufacturer Consolidated Safety Valve Div of MM&M b For drum Number 3 Size 3 in. Fittings Drip pan elbows and gags Fig. No. 1758A (Maxiflow) Setting 1725 1740 1760psig Relieving capacity 269,800 272,100 275,200lb/hr Type ends Butt welded c For superheater Number 1" Size 3 in. Fittings Drip pan elbows and gags Fig. No. (Maxiflow) I758WD Setting Relieving capacity 1630 199,000 psig lb/hr Type ends Butt welded - =;n - - WAD00127 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 d For reheater Number Size Inlet 4 4 Outlet 1 4 in. PIPING VALVES AND FITTINGS (Cont'd) Fig. No. 1775WB 1775WE Fittings Drip pan elbows and gags Setting 450,455 460,460 395 psig Relieving capacity 758,200 143 000 lb/hr Type ends Butt welded 35.4 Power control valve shall be mounted on superheater outlet header preceded by gate valve and shall be furnished with muffler, as follows: a Manufacturer Consolidated Safety Valve Div of MM&M b Size ____________________ 2-1/2 _________________in. c Setting d Capacity 1375________________ psig 123,000_____ lb/hr e Switchboard type (remote manual control) f Operation on 123 volt d-c g Fig. No. 15,380 h Type ends _________________ Flanged 5 Coils, for cooling samples of boiler water and condensing steam samples shall be supplied as follows: a Manufacturer Bailey Meter Company b Type and Number 195531A1-Size 8-16-12-x c Size Outer coil 1 in. - inner coil l/2 in. OD .6 One steam gauge shall be provided with snubbers, syphons, shut-off and drain valves, as follows: a Manufacturer Ashcroft Gage Division of MM&M b Size12in. c Range ______ 0 to 3500 d Fig. No. __________________ 2079-D psig - 51 - WAD00128 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 The following instrument connections shall be provided by the Seller with approval of location by the Purchaser: .1 Permanent connections, which shall include a test connection, shall be els follows: a Drum pressure b Superheater outlet header pressure c Furnace draft d Draft entering secondary superheater e Draft leaving secondary superheater f Draft leaving primary superheater and reheater g Draft at boiler outlet h Draft at economizer inlet i Draft at economizer outlet * j Draft at induced-draft fan outlet k Draft at airheater outlet 1 Draft at dust collector outlet m Pressure at forced-draft fan outlet n Pressure before airheater steam coils o Pressure after airheater steam coils p Pressure at windbox q Pressure at airheater outlet * r Pressure at reheater inlet * s Pressure at reheater outlet t CC>2 at boiler outlet u Og at economizer outlet * v Temperature feed water to economizer (thermocouple type) w Temperature of feed leaving economizer (thermocouple type) x Temperature secondary superheater inlet steam (2 thermocouple test and permanent wells) y Temperature secondary superheater outlet steam (2 thermocouple test and permanent wells) * z Temperature reheater inlet steam (2 thermocouple test and permanent wells) - 52 - INSTRUMENT CONNECTIONS WAD00129 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 , Rev 1 - August 14, 1959 aa Temperature reheater outlet steam (2 thermocouple test and permanent wells) * bb Temperature steam entering airheater steam coils * cc Temperature drains leaving airheater steam coils dd Temperature gas at economizer outlet (thermocouple type) ee Temperature gas at boiler outlet (thermocouple type) ff Temperature gas at airheater outlet (thermocouple type) gg Temperature gas across superheater hh Temperature air entering airheater steam coils ii Temperature air entering airheater steam coils jj Temperature air leaving airheater (thermocouple type) kk Temperature in primary air duct before tempering * 11 Temperature in primary air duct after tempering ram Air flow through boiler (2 required) nn Gas mass flow 36.2 Test connections as follows shall be provided for taking gas samples: a COg at top of first pass b CO2 boiler outlet c COg at airheater outlet d Og at economizer outlet INSTRUMENT CONNECTIONS (Cont'd) 37 After thorough cleaning. Seller shall paint all exposed PAINTING surfaces of boiler drums, headers, tubes, ducts, structural steel, casings, fans, dust separator, airheater and all other parts requiring paint with one priming shop coat of paint as follows: - 53 * Instrument connections in Purchaser1s equipment WAD00130 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's . Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 Temperatures Involved Up to 200 F 200 to 400 F 400 to 1000 F Priming Coat Specifications Federal Specification TT-P-86 (a) Type II red lead paint Cheeseman-Elliott Co. No. 357 Heat Resisting Gray Primer Cheeseman-Elliott Co Hi-Degree Gray Coating Before painting, surfaces shall be thoroughly cleaned of all oil, grease, and loose mill scale and rust. Paint shall be applied by brush or spray to surfaces at temperatures of not less than 40 F. All parts that will be inaccessible after erection shall receive two coats of shop paint. Sole plates, shims, wedges and leveling steel work on Purchaser's foundations shall be furnished by Seller. Pur chaser shall provide and set foundation bolts in accordance with drawings that Seller shall furnish. Approximate net weight of equipment and accessories shall be an follows, in pounds: Each drum 186,000 Front water wall Rear Water wall Side water walls Division Wall 139,777 199,187 195,145 110,160 Roof Boiler tubes 59,340 20,320 Downcomer system 15,560 Airheater 1,491,490 Superheater 428.000 Reheater Economizer 184.000 297.000 Dust separator 113,000 Total weight of the steam-generating unit (including the above, plus all piping, mis cellaneous valves and fittings-excluding operating water) 6,499,0001b - 94 - PAINTING (Cont *d) SOLE PLATES WEIGHTS WAD00131 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August 14, 1959 Water contents shall be as follows: WATER CONTENTS 1 Boiler water, operating at normal drum level ^12.000 lb .2 Boiler water, flooded for hydrostatic test (cold)kkl,OOQlb PROCEDURES Seller shall furnish two copies of standard Manufacturer's Data Report covering fabrication of all pressure parts in Seller's and/or Subseller's shops. Prior to shipment and following inspection in Seller's Shop of all pressure parts by Hartford Steam Boiler Inspection and Insurance Company's inspectors, who shall be certified by National Board of Boiler and Pressure Vessel Inspectors, Seller shall furnish two copies of Certificate of Inspection. Manufacturer's Data Reports and Certificate of Shop In spection shall certify that all pressure parts of SteamGenerating Units have been constructed in strict accordance with requirements stated in paragraph 3 hereof, and that in spections made by representative of Hartford Steam Boiler Inspection and Insurance Company discloses that material and workmanship of all pressure parts are in accordance with aforesaid requirements and have the approval of National Board of Boiler and Pressure Vessel Inspectors and Hartford Steam Boiler Inspection and Insurance Company. Prints of Seller's drawings listed in part as follows and specified by Character, Number and Date shall be considered a part of these specifications: Character of Drawing______ Steam generator, side view Steam generator, front view Plan section through furnace Number 9029F 9026f,7F,8F 9030F,9031F Date _________ _________ _________ All flanges, openings and nozzles shall be adequately protected during shipment to prevent corrosion and the entrance of foreign matter. Nameplate showing pertinent data concerning steam-generating units shall be furnished, after approval by Purchaser. MANUFACTURER's DATA REPORTS AND CERTIFICATES DRAWINGS SHIPPING PROTECTION NAMEPLATES - 55 - WAD00132 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 The following tools shall be furnished: Wrenches for manhole nuts. Gags for all safety valves shall be furnished with the boiler. Hydrostatic test pump. TOOIS - 56 - WAD00133 E8ASC0 SPECIFICATION MX-2 Revised November 22 1Q$4 MOTORS FOR GENERAL SERVICE Purchaser's Identification. Spec. No. PSCC-C2-102-SG Dare of Spec October 1, 1958 1. Operating Comnanv PUBLIC SERVICE COMPANY OF COLORADO Station and Project CHEROKEE STEAM ELECTRIC STATION 1959 - 110,000 KW EXTENSION - UNIT NO. , BABCOCK & WILCOX CQ 2. This specification covers production line type motors for applications requiring little or no deviation from manufacturers1 regular designs in fractional and integra. horsepower sizes. 2 PROJECT SCOPE 3. All motors supplied shall be in accordance with this speci fication and the applicable Standards of ASAj AIEE and National Board of Fire Underwriters Rules and in accordance with all state laws and local ordinances of the place of installation. NEMA standards shall be conformed to when not in conflict with the foregoing. STANDARDS 4. The Seller shall supply the following information for each motor included in the "List of Motors" below, plus any motors not listed which Seller intends to furnish as part of this order. .1 Name of motor manufacturer 2 Nameplate data (as stated in NEMA Standard MG1-1949) seller's 0ATA 5. Data for all motors required shall be as follows: LIST OF MOTORS I t.em No . ** Quan tity Service 1 Soot blower element rotating Loca tion ** Volt- HP age FreqPhase *-* Synch Speed Enclo sure* 0D 44o 60/3 TE ** This information to be completed by Seller and transmitted to Purchaser as soon as possible. `Abbreviations: TE - Totally Enclosed; DP - Drip-proof; WP - Weather Protected 6. The above motors shall be supplied in accordance with the following specific requirements: APPLICATION REQUIREMENiS .1 Single phase motors shall have built in thermal protection. 2 Motors rated 440 volts shall have Class A, powerhouse insu lation; motors rated 120 volts shall have Manufacturer's standard Class A insulation. 3 Seller shall supply terminal connectors, Burndy type YAV or equal, for motor internal leads,. 4 Seller shall submit, for Purchaser's approval, 9 copies of preliminary outline drawings and 13 final approved drawings. WAD00134