Document wkvVde0mgqmVVVKaqQZy7jq3

August 11, 1992 TO: Steve Milligan Carl Mercer Dave Steele Mitch Juneau Christina LeBlanc Wally Bounds Buck Bailey Tom Bradley Gerald Wagener RE: Just A Reminder Phase II Review for T-8-2 Bottoms Surge Tank The Phase II Review for the proposed T-8-2 Bottoms Surge Tank at 1:15 today at Glycol II's Large Conference Room. Regards, Steve Cook Glycol II LACSDC::SCOOK DO A 13581,3 CONFIDENTIAL 8/92 T-8-2 BOTTOMS SURGE TANK D-820 CONTROL PHILOSOPHY The bottoms stream from the T-8-2 tower at Glycol-II contains mostly water with small percentages of EO, Acetaldehyde, and MEG. Under normal operations this stream is pumped to Central Waste Treatment. Should CWT be unable to take the stream or TOD go out of spec the stream must be stored in frac tanks. D-820 is a surge drum designed to handle normal rates from T-8-2 bottoms for A days. The operating range for level in the tank is 10% to 80%. This would allow for upset conditions either in-block or at CWT, and would eliminate the need for the frac tanks. The bottoms stream is currently pumped via P-157A/B and level controlled to CWT. The same bottoms pumps and level controller will be used to control the stream to D-820. D-820 will have redundant level transmitters each sending a signal to he Foxboro. A hand switch will be used to select the higher of the level signals and forward this signal to the flow controller set point for D-820 bottoms. At some predetermined level the flow controller set point will be adjusted to turn the tank level. D-820 bottoms will be flow controlled to the CWT header. The set point for this flow controller will be, as mentioned above, reset by the tank level transmitter signal. A pad/depad system will be used to control the tank pressure. Nitrogen makeup will be used to pad the tank while tank vents back to T-8-2 will be used to depad. Dual pressure transmitters will signal a hand switch and split range pressure controller on Foxboro; the nitrogen pad con trol valve will be active below desired pressure set point, the vent depad control valve active above set point. For monitoring purposes, 2 temperature elements will be installed in the liquid level and a pressure gauge in the vapor space. Also a ph probe will monitor the stream to CWT. DO A 135814 CONF TDFNT TAt Design Criteria Glycol II Surge Tank Project Christina LeBlanc D-820: Stainless Steel Drum Purpose: D-820 will serve as a surge tank for T-8-2 bottoms. The tank is designed for 4 days residence time at normal rates. This allows for upsets in TOD levels and CWT plant upsets. The operating level will be from 10% to 80%. Design Basis: Feed flow Composition Operating Pressure Design Pressure 7 gpm H20 0.83 (mass fraction) Acetaldehyde 0.10 Ethylene Oxide 0.01 Mono-Ethylene Glycol 0.06 80 psig 150 psig Operating Temperature: Design Temperature : 100 C 500 F Materials of Construction: Carbon Steel with Stainless Steel lining Dimensions: length: 51' diameter: 13'-0" volume: 50400 gal Orientation: Horizontal 135815 DO A COMF1 FOFM: RELIEF PSV POSV PRESSURE SAFETY VALVE (PSV) PILOT OPERATED SAFETY VALVE (POSV) FCR4 REV: 10-SEP-91 Rl E| DESCWFTICN WXOUNTING DATA: 10111 SITE |012| LOCATION |013| CHARGE NUMBER |014| B/M NO. (M/S MO.) VALOE UNITS IRI IE| description VALUE UNTO P1AQUEMDE, LOUISIANA BLOCK 53 411556-01 | 10151 MANUFACTURER 1 |016| MANUFACTURER MODEL 1 |017| IWBER OF UNITS | % 10181 EQUIPMENT TYPE * * 2 BELLOWS TYPE PSV TAG TABLE: |040| TAG NO. II |041| PSV-82GA : P&ID MO. * : B1HD4S-G5S-001 : OWNER I.D. MO. 1 | | TAG NO. 11 1 1 106| PSV-820B : P4ID NO. : B1-045-G55-001 OPERATING CONJITIOIE: ) 1001 MATERIALS HAND1ED 11011 REQUIRED CAPACITY % 11021 VAPCR FRACTION %|103| VAPCR MOL. WEIQH 4|104| SP. GR. (FLOWING) %|105| DENSITY (FLOWING) 4|106| VISCOSITY (FLOWING) |107| SPECIFIC HEAT RATIO |108| OCMPRESSIBILITY FACTOR 11091 FREEZING TEMPERATURE 4|110l Hmi TEMPERAIURE 4|111| FELIEVIN3 TEMPERATURE PROCESS 1 42 2.16 1.39 .012 100 285 : LB/HR : LB/FT3 : cP : Cp/Cv :F :C :C !i Q 1 1 11121 OUTLET TEMPERATURE 1 %11131 SETT PRESSURE 1411141 RELIEVING PRESSURE 14)1151 NORMAL PRESSURE 1411161 PROTECT EQUIP EES IRES 1411171 CONSTANT BACK PRESS |4|118| BUILT-UP BACK PRESS |4|119| OVERPRESSURE |4|120| INLEI PIPING DELTA P 14112X1 OUTLET PIPING DELTA P 1 11221 150 181.5 55 150 0 18.6 21 3.45 18.6 * : OWNER I.D. NO. :F : PSIG : PSIG : PSIG : PSIG : PSIG : PSIG :% : PSI : PSI : PSI DESIGN BASIS: 4|140| FAILURE CASE FIRE EXPOSURE 11411 AREA CALCULATED 4|142| AREA SELECTED 3.317 411431 SELECTED AREA CAPACITY: 34810 : IN2 : IN2 : LB/HR iAPPLICABLE INDUSTKY/GOVERLMENT CODES STANOARDS: t12001 APPLICABLE OODES STD -CONSTRUCTION DETAILS GENERAL: 4|220| CRIFICE DESIOWTICN L 4|221| SEAT TYPE %|222| SIZE - INLET 41223| SIZE - OUTLET FETAL/FETAL 3 4 4|224| TYPE CONNECTIONS FLANGED 4|225| INLET COtMECT. RATING 150 : INCH : INCH : PSIG 1 11441 BLOW-DOWN (POSV) 14)145) DISCHARGE CCEF (K) l%1146| MOUNTED WITH PRD 0.95 NO I 12011 HAZARD CATEGORY 14|226| OUTLET CONNECT. RATING: 150 1412271 TYPE FLANGE FACING IN RF 14|228| TYPE FIANCE FACING OUT: RF 14|229| GASKET FACE TOLERANCE 125/250 IWS 1 12301 ABRASIVE BLAST/PRIME 1 12311 FINISH COATS SPEC. : PSIG FUE/XB NO. P.O. NO. LATEST REVISION MARK LAST MODIFIED DATE 7-ADG-92, THE DOW CHEMICAL COMPANY TAG NUMBERS TAG NUMEERS SPEC/DATA NO. 15:04:32 SHEET NO. **** FOR INTERNAL USE ONLY **** : PSV-82QA, B : A4-PSV820-G55-001 : 1 OF 2 DO A 135816 CONFIDHNTTAl mSSOFE SAFETY VALVE (PSV) PILOT CPERATED SAFETY VALVE (POSV) OCMSTRUCTICN DETAILS - PSV SPECIFIC: % 12501 BOWET TYPE : CLOSED % 12511 CAP % 12521 1EVER : YES ; NO l|253| LEVER TYPE | |254| GAG : N/A : NO LATERIALS: |320| ITEM 11 %|321j BODY % 13221 BONfCT %1323 f PILOT %|324| WETIED PARTS %|325| NOZZLE % 13261 SEAT |327| SEAT HARDNESS %|328| SOFT SEAT %|329| DISK CIASS/SPECIFICATICN CS cs N/A 316SS 316SS 316SS : BRINNELL 316SS 11 1 ITEM 11 1 l%|330| GUIDE 1 % 13311 SPRING f % 13321 SPRING CORK. RESIST. |%|333| BELICWS (PSV) 1 13341 PISTON/DIAPHRAGM POSV 1 13351 TRIM (POSV) 1 13361 GASKETS 1 |337| BOLTS/STUDS 1 13381 NUTS OASS/SPECIFICATION 316SS CS YES 316SS TESTS AND INSPECTIONS: |900| ITEM REQUIRED CR AMOUNT 11 19011 TEST SPECIFICATION NO. * 19021 MATERIAL CERTIFICATES |903| CERTIFIED TEST REPORTS: :WIINESS| | | ITEM 11 1 1 1904! INSPECTION BY 1 19051 SPRING ADJUST. SEAL REQUIRED CR AM3UNT :WITCSS RRNUFACTUFER FURNISHED DOOMNTS & MISCELLANEOOS: |920| TEST PEPCKTS :* |921| CAPACITY CORVES :* |922| DMNSIONAL DRAWING ; * I |923| PART & MCTL SPEC LIST: * | |924| TOTAL SHIPPING WEIOH : * I |925| REOO*EM) SPAPE PARIS : * : LB ADDITIONAL REQUIREMENTS TO MANUFACTURER: % 11. SUPPLIER SHALL CCMPICTE ALL JNPCFMCTION PARKED WITH AN ASTERISK <*) . %|2. N/A " WT APPLICABLE. %|3. DOW TAG NUMBER SHALL EE ATTACHED TO THE RELIEF DEVICE. %|4, ALUMINCM PARIS ARE NOT ALLCTOD. %|5. CONTACT PROCESS ENGINEERING ON ANY CHANGES TO ABOVE SPECIFICATION ADDITIONAL REQUIREMENTS TO DESIGN ENGINEERING: %|1. SEND FINAL INSTALLATION DRAWINGS TO PROCESS ENGINEERING FCR RE-CHECK OF ACTUAL PRESSURE CROP VERSUS ESTIMATED. DESIOED BY, APPROVAL S REVISION: |975| PROCESS EN3L EES. BY : LEBLANC, CL |976| DESIGN EN3t DES. BY : |977| APPROVED BY : : 7-JUL-92 | |978| IATEST REV. BY : | 19791 REV. APPROVED BY : FUfi/JCB NO. P.O. NO. LATEST REVISION MARK 1AST MODIFIED DATE 7-ADG-92, THE DOW CHEMICAL OCMPANY TAG NtMEERS TAG NLM3ERS SPEC/DA3A NO. 15:04:32 SHEET NO. Nods: LACSD4 **** FOR INIERNAL USE ONLY **** Project name: GLYCOL SURGE TAN Project owner: 0099546 PSV-820A, B A4-PSV820-G55-001 2 CF 2 Print (tote: 7-AUG-92 DO A j 35817 mM