Document 2RJ0QX9v7yK4v8wLxBXwbJ2O5

STANDARD OIL'COMPAinf. .OF CALIFORNIA ENGINEERING' DEPARTMENT - SAN FRANCISCO SPECIFICATION NO. EG-I38I-F MAY 25, 1967 SECTION A PAGE 1 OF 8 SPECIFICATION NO. EG-I38I-F THERMAL INSULATION FOR HOT LINES AND VESSELS SECTION A TECHNICAL REQUIREMENTS 1.0 SCOPE This-Specification covers the requirements for insulating vessels, tanks, heat exchangers and lines with hot surfaces. 2.0 PIPING 2.1 Piping shall he insulated in accordance with form EF-630 and Drawing GA-N-99783. The specified thickness of insulation does not include weather coating. 2.2 Emulsion type weather coating shall, not he applied when atmospheric precipitation or condensation may wet the finished surface within 2k hours -after application.- - - . ... -- 2.3 Traced lines shall he insulated with oversized rigid pipe covering, calcium silicate of a brand approved hy COMPANY. Covering sections shall all he of the same I.D. with a maximum clearance of l/k-inch between the tracer or pipe and insulation. Materials and insulating techniques used shall he as shown on Drawing GA-N-99783 except as follows: At points where steam tracing Is helically wound, the tracing shall he covered with 28 ga. galv. steel to support the insu lation and an oversized insulation sleeve, tightly fitting over the pipe insulation, shall he used. The thickness of the sleeve shall he the same as that of the pipe insulation. At each such helix, the pipe insulation shall he ended at a point Irinch short of each end of helix. The oversized sleeve shall he lapped 2 inches past the ends of the pipe insulation. On all steam traced lines, a hare copper wire (lk gage) shall he installed under the tie wire of the weather coat for the full length of the steam tracer to mark its route. 2.k AH metal jacket weather coating shs.ll he secured with stainless steel straps. CHEV BB 0000486 STANDARD OIL COMPANY OF CALIFORNIA ENGINEERING DEPARTMENT - SAN FRANCISCO SPECIFICATION NO. EG-I38I-F MAY 25, 1967 SECTION A PAGE 2 OF 8 2.5 All insulation and weathercoating used on or within 25 feet of furnaces shall he fire resistant. Galvanized steel or stainless . steel' weathercoating shall bemused instead of aluminum. Asphalt or other flammable weathercoatings are not acceptable. 3.0 VESSELS, COLUMNS, AND HEAT EXCHANGERS 3 1 Block insulation shall be applied in accordance with form EF - 630 and Drawing GA-N-99705' Thespecified thickness of insulation does not include weather coating. 3.2 Vertical vessels 3-it and larger in diameter, operating below 350F may be insulated with glass or mineral wool fiber blankets. .Details shall be as specified in Paragraph 4.0 below. 3.3 Acceptable weather coat materials are: 3 31 Asbestos cement sheet 3/l^-inch thick, conforming to ASTM C-220, type F (Johns-Many!lie.Asbestocite .unless otherwise specified), applied as specified in Paragraph 4.3 below. Precurved sheets are required for diameters 10-ft and under. 3-32 Corrugated (0.016" min. thickness) or flat (0.019" min. thickness) aluminum sheet with vapor barrier(Childers or Premetco unless otherwise specified). .Application shall be sb specified in Paragraph 4.3. 3.33 Asphalt emulsion coatings (Chevron Asphalt Co's Laykold, or Johns-Manville Insulkote unless otherwise specified). These may be used only on block or rigid insulation where temperature of insulation surface will not exceed 175F. They shall not be applied when atmospheric precipitation or condensation may wet the finished surface within 24 hours after application. 3*4 Nameplates and weep-hole nipples on reinforcing pads shall not be covered. 3.5 Insulation for exchanger channels shall not include insulation of channel covers. Exchanger flanges shall not be insulated. 3.6 Each section of a double pipe exchanger shall be insulated as a single unit. Continuous insulation around a multi-sectional unit is permissible only ..with specific written approval by company; ` CHEVBB 0000487 4.0 TANKS STANDARD OIL COMPANY OF CL-il* OrKIA ENGINEERING DEPARTMENT - SAN FRANCISCO SPECIFICATION NO. EG-I38I-F MAY 25, 1967 SECTION A PAGE 3 OF 8 4.1 Shell Insulation - Tank shells shall he insulated with glass or mineral wool (Owens-Corning PF-613 semi-rigid hoard), maximum temperature limit 350F. The material shall have a minimum density of 3 Ibs/cuhic ft. Refer to Drawing GB-N99995* 4.11 Blankets shall he placed with the long dimension vertical and with vertical joints staggered. Blankets shall he secured to the tank with l4-gage galvanized wire fastened to welding studs (See, 4,22 and 4.32 below) to hold blanket in place until weether coating- is applied.. The blanket insulation shall extend to within 12 inches of tank bottom. The space between bottom of insulation and tank bottom shall be filled with 12-inch high foam glass block. Blocks shall be held tight to tank 'with 14-gage 300 series stainless steel wire. 4.12 Insulation.shall be fitted around nozzles, manways, and other appurtenances to allow room for boit removal. These appurtenances shall-, not be insulated and weather coat shall be completely sealed with weather-proof material to prevent leakage into the insulation. Insulation around structural members supporting stairs, etc., shall be suitably weather-proofed and flashed with aluminum (l6-gage minimum) or galvanized steel. "4.2 Asbestos Cement Sheet Weather Coating 4.21 Materials - Weather coating shall be 3/l6-inch thick asbestos cement sheets per ASTM C-220 type F. Threaded welding studs shall be solid type 304 austenitic stainless steel or composite with type 304 steel at exposed end- and carbon steel at tank attachment end. Minimum diameter.shall be 5/l6 inch. Stainless steel stud nuts or aluminum, caps shall be used. All external metal on the surface of the finished asbestos cement weather coating, except flashing but including studs, stud nuts, .battens and bands, shall be austenitic stainless steel. Flashing may be aluminum. (l6 gage minimum) or lead. CHEV BB 0000488 - STANDARD OIL COMPANY OF CALIFORNIA ENGINEERING DEPARTMENT - SAN FRANCISCO SPECIFICATION NO. EG-1381- F MAY 25, 1967 SECTION A PAGE 4 CF 8 U.22 Installation - The 4-ft by 8-ft asbestos cement sheets shall be oriented with the long dimension horizontal. Threaded welding studs shall be spaced between the sheets of the asbestos cement board on 2-ft vertical centers and 8-ft horizontal centers,' and in addition there shall be one stud in the center of each asbestos cement board. Center studs shall be on 8-ft horizontal centers^'and!`45-inch vertical centers. Studs shall be secured with a stud welding gun and tested with a light hammer blow'ta be sure the weld is sound. Asbestos cement sheets shall be drilled to fit studs snugly and mastic coinpound 'shall be" used to seal the outer washer to prevent entrance of water at'stud holes. The asbestos cement sheets shall be lapped 3 inches' on the . horizontal joints, with the upper sheet on the outside. The upper, sheet shall be 'supported, from the lower by stain less -steel "3" or. "Z".'clipsJ"6r.;by providing a supporting ledge in the batten over, the" vertical: joint. The sheets ..in each row shall be placed^with'vertical! edges not more than 2 inches'apart, centered^oh Studs,: and the joint covered with l/l6-inch minimum thickhess..by 4-inch wide austenitic stainless steel battens secured with threaded stainless steel nuts to the stud's on 2-ft vertical centers. The sheets shall be further secured by ..austenitic stainless steel straps, 3A-Inch wide by 0.020 inches thick'placed above the studs at each 3-iach horizontal, lap and.the...center of each sheet "on approximate 2-ft vertical., centers-."-. Straps for tanks l8-ft and larger in diameter shall be secured to heavy stainless steel spring clips. See Drg. GE-N99995 Det. "K". Shell insulation shall be flashed with lead (minimum 2-1/2 lbs ) or aluminum (l6-gage minimum) to prevent moisture from entering'the insulation at openings, structural connections, or at the eaves. 4.23 - Where asbestos cement-sheet weather coating is to.be painted, the sheets1- shall be sealed on back and edges (before instal lation -bh: tank) with a vinyl sealer ' (Amercoat 1637 unless otherwise specified). STANDARD OIL COMPANY OF CALIFORNIA ENGINEERING DEPARTMENT - SAN FRANCISCO SPECIFICATION NO. EG-I38IE MAY 25, 1967 SECTION A PAGE 5 OF 8 Aluminum Weather Coating When aluminum weather coating is specified, the following procedures shall he used. 4.31 Materials - Materials shall he 1-1/4 inch or 2-1/2 inch deep corrugated aluminum sheet, 0.016 inch minimum thick ness. Temper shall he 3/4 hard with copper content not exceeding 0.40$. All attaching fixtures shall he austenitic stainless steel except': (a) sheet metal screws may he aluminum; (h) stud caps may he aluminum; and (c) studs may he composite, i.e., austenitic top and carhon steel hase. All aluminum sheets shall have a vapor harrier (Childers or Premetco) unless specified otherwise. 4.32 Installation - All sheets shall he lapped two corrugations on the vertical and 4 inches bn horizontal seams (see drawing GB- N99995). -Each sheet shall he supported horizontally hy two "S" clips and shall he attached to tank hy three 5/l6-inch diameter welding studs (Nelson Setlok type unless otherwise specified) on each vertical seam.: Studs shall he located in the crown of corrugation nearest to edge of sheet. First stud shall he 6 inches from bottom of sheet. The other two studs shall he equally spaced between bottom studs and bottom studs in next sheet above. Maximum vertical- spacing between studs shall he 48. inches (12-ft sheets). Studs shall he secured with a s'tud welding gun and tested with a light hammer blow to he sure the weld is sound. If stud spacing exceeds 48 inches, additional equally spaced studs shall he used. In line with and spaced oh center between studs shall he a 1/2- inch No. 10 sheet metal screw to assure tight contact between lapped sheets. Aluminum sheets shall he impaled on the studs using a rubber hammer. Sheets shall not he drilled. Horizontal joints shall he fastened on 6-inch centers with gasketed, self-tapping, sheet metal screws (see drawing GB-N99995 for spacing and types of studs and screws). Aluminum sheeting shall he held against the insulation hy 0.020 inch hy 3/4-inch stainless steel straps on 4-ft maximum vertical centers. Maximum length of strap without a break shall he 50 ft. Expansion springs as shown on drawing GB-N99995 shall he installed in each strap. Folded straps or CHEV BB 0000 490 STANDARD OIL COMPANY OF CALIFORNIA ENGINEERING DEPARTMENT - SAN FRANCISCO SPECIFICATION NO. EG-1381-F MAY 25. 1967 SECTTI * A PAGE 6 OF 8 corrugated straps or other tensioning devices having relaxation tendencies are not acceptable. Straps shall . be supported with J-clips .fastened to the l/2-inch No. 10 sheet metal screws shown on drawing GB-N99995 Weather coating shall terminate 2 inch from tank., bottom, Atypical details for finishing: top of weather coating are shown on drawing GB-N99995 4 A Roof Insulation Roof insulation- shall be 12-lb Fiberglas roof deck, J-M Thermobestos . unless otherwise specified, and shall be secured by impaling the blocks on welding studs- spaced to provide' four' studs per block of insulation. Lengths of studs shall equal but not exceed the thickness of the insulation. The roof shall be. finished, either with l/h-inch thick asbestos cement sheets.meeting ASIM C-220, Class F, or with a mopped down l/2-inch thick fiberboard. Joints shall be butted and topped with a built-up four layers of 15rlb; asphalt.saturated asb.estos roofing felt.. ' ....... ............... 5-0 MISCELLANEOUS EQUIEMECT. . 5..1 Pumps, turbines,, .and other miscellaneous equipment shall be insulated ohiy .when specified by COMPANY. Access .shall be provided to pump and turbine glands, and other points- requiring periodic maintenance. 5-2 Plastic insulation, Johns-Marrville No. .^50. unless otherwise specified, shall be used on any surface which is not suited to block insulation, but.the use of plastic insulation shall be kept to a minimum.. Insulation shall be applied on clean surfaces . to recommended thicknesse.s. If a second layer is required plastic insulation shall be allowed to set and 1-inch by 20-gage galvanized hexagonal mesh applied over the-,entire plastic insulation surface with butted joints laced together with No. 18 gage galvanized iron wire and- secured, to the insulation. with 1-l/2-inch copper vine staples, placed to hold mesh snugly against the insulation. The insulation, when dry, shall be covered with weather coating per drawing GA-N99785* - STANDARD OIL COMPANY OF CALIFORNIA ENGINEERING DEPARTMENT - SAN FRANCISCO SPECIFICATION NO. EG-I38I-F MAY 25, 1967 SECTION A PAGE 7 OF 8 6.0 POLYURETHANE INSULATION , -6.1 Preformed block or'foamed-in-place polyurethane foam'insulation may be used to insulate piping and equipment operating up to a maximum metal temperature of l80F when specifically approved by COMPANY in writing.... Polyurethane insulation shall, not be used within 25 feet of any. fired heater. 6.11 ' Materials: All polyurethane insulation shall have a fire- retardant additive, and shall be classified iion-burning by ASTM D-I692-59T, Test for Flammability of Plastics, Foams and Sneeting (Tentative). Insulation shall have a maximum thermal conductivity of 0.15 Btu/hr-sq.ft./F per inch at 0F. The insulation shall have a minimum density of 2.0 lb/ft3 and a maximum density of 2.5 lb/ft^. 6.2 Preformed Block Application - Preformed block insulation shall be installed in accordance with paragraphs 2.0, 3.0, and 4.0 of this ' Specification. ''Polyurethane sha11 not be used on traced lines' where the tracer metal temperature is over l80F. 6.3 Foamed-in-Place Application - Polyurethane resins shall contain suitable admixtures- and sha 11 be applied in such a manner that the insulation is of the required thickness and of unicellular con struction. The insulation shall consist of many small cells approximately equal in size. The polyurethane liquid shall have a 30-40 second delay before foaming takes place to allow time for the liquid to run into confined areas and hard-to-get-at locations such as around vacuum rings on vessels and large piping. 6.31 Application may be by gunning, by frothing, or by pouring in place, in .accordance with paragraphs 2.0, 3-0, and 4.0 above. 6.32 All polyurethane pre-foam liquid shall be placed into forms made of 0.0l6 inch flat or corrugated aluminum sheets (weather coating) spaced from the vessel by polyurethane blocks. Sheets shall be sized to reduce the number of joint overlaps as much as possible. "S" clips shall be used to'keep the aluminum sheets in place. The sheets shall be lapped 4 inches on both horizontal and yertical seams. The sheets shall be fastened on with stainless steel straps. All edges of the sheets shall be sealed by pop rivets or sheet metal screws at 12 inch maximum spacing. CHEV BB 0000492 STANDARD OIL COMPANY OF CALIFORNIA ENGINEERING DEPARTMENT - SAN FRANCISCO SPECIFICATION NO. EG-1381-F MAY 25, 1967 SECTION A PAGE 8 OF 8 6.321 Aluminum sheeting shall be held against the insulation by 0.020 inch by 3/^-inch stainless steel straps on 4-ft maximum vertical centers. Expansion springs as shown on drawing GA-N99995 shall be installed in each strap. Folded straps, corrugated straps, or other tensioning devices having relaxation tendencies are not acceptable. Straps shall be supported with j-clips fastened.to the 1/2-inch No. 10 sheet 'metal screws shown on drawing GA-N99995. 6.33 Gunning, frothing, or pouring, in place-shall be done so that there are essentially no voids in the insulation and in areas around stiffening rings. Any voids shall be repaired by refoaming'of' by installation of fitted preformed blocks glued to trimmed foam. Individual pours or lifts shall be limited to 18 inches vertical rise to avoid compression, of the. foam. 6.h Weather Coating - Banded aluminum shall be used as a weather coating for preformed, block or foamed-iri-place insulation. No vapor barrier is required under the weather coating. 6.5 Inspection - Foam density shall be .checked by taking one-inch diameter core.samples through the metal jacket .and visually comparing the core with .a polyurethane standard of known thermal conductivity. The core shall be inspected for cell size and homogeneity. The core shall be refoamed and a weather-tight patch placed over the metal jacket. Sample cores shall be taken at points indicated by COMPANY. 7.0 FORMS AND DRAWINGS The following forms and drawings are a part of this Specification: EF-630 Summary of Fireproofing and Insulation for Equipment and Piping GA-N-99783 GA-N-997S5 GA-N-99995 GB-N-99993 Standard Insulation for Hot Piping Standard Insulation for Hot Vessels Standard. Insulation and Weather Proofing Details Standard Insulation" Item Numbers