Document Jvr9MNG922jBxr0xqzLjBL54Z

(conoco) Interoffice Communication To 0. R. Holcomb From A1 Peck Oat* October 11, 1974 subject Relocation of Laboratory VCM Vents Attached is a revised process design to route two laboratory VCM vents to the existing VCM vent header system in the tank farm area. This design is being Issued as final unless further comments are received. The laboratory currently vents excess VCM liquid collected in sample bombs through a short vent pipe located on the roof of the lab. VCM vapor from the GC sampling system is also periodically vented through the north wall. The vented VCM vapors pose two potential hazards: 1) The fumes can enter the control room due to the proximity of the . lab vent to the control room air intake. 2) The vapors could be dangerous to personnel in the area during venting before the vapors have dispersed. To control these hazards the vents will be routed to the existing sample vent header in the tank farm area. This header presently runs to the temporary vent on top of the T-411C sphere. As this vent is 85 feet high the VCM will be dis persed more effectively and the exposure hazards will be reduced. When the re frigerated rail car vent recovery system is completed, the VCM sample vent header will be tied in with this system. This design includes some minor revisions to the existing laboratory venting appa ratus. These revisions are necessary to prevent non-VCM contaminants from entering the vent system and to insure that no excessive pressure buildup occurs in the vent line. An important addition to this design would be to return excess VCM liquid to the process via the recirculating sample loops while taking the next sample. This would require purchase of additional sample bombs so that each sample bomb would be assigned to a specific sample type. This procedure would reduce VCM emissions by limiting the use of the lab VCM bomb purging system. A1 Peck CC: RDG-0AD-JHM-GGD-JRH(4)-CEG-PLF-0$R-JCL CCR 0032030 DISCUSSION LABORATORY VCM VENT A. laboratory Hood Apparatus Modifications (Figure 1) The steam and vacuum lines are to be disconnected from the VCM venting manifold and sealed. A separate steam system to clean one bomb at a time should be built complete with tubing connections and a holder. After the vacuum line to the venting manifold is disconnected the present vacuum system will still permit evacu ation of one bomb at a time. A pressure gauge and valve will be added. The gauge will be used to determine the manifold back-pressure and the valve used to throttle the flow to the vent. The operating procedure for use of this apparatus are describe on Figure 4 and 5. B. Laboratory GC Sampling System Changes (Figure 2) The GC sampling system vent will require new stainless steel tubing and a check valve as shown. The tie-in to the vent line.is also shown. C. Vent line (Figure 3) The laboratory VCM vent is to be routed to the pipe rack on the north side of the building. The GC sampling system vent should be tied in at this point. The line is then routed as shown to an existing valved connection on the VCM sampling system vent header. The first 50 feet of the pipe from the lab should be steam traced to vaporize any VCM liquid. Low points in the line should also be steam traced to vaporize any liquid that may become trapped at these low points in the line. OCR OOOOQ2081 CCR 000082083 ^2 ^ v ? * * r* *)tth\L "V CCR 000082084 1) Prior to operation check the backpressure. Gauge should read 2ero. 2) Connect the sample bombs to the lower fittings of the VCM vent apparatus. 3) Check that the vent valve is open and the drain valve is closed. 4) Close the hood except for a gap to be able to manipulate the nitrogen throttle | valve, lower VCM vent valves, and the vent valve. "5) "Open one of the lower VCM vent valves and the corresponding lower sample bomb valve. ! s : : ........-- i 6) Open the nitrogen supply and throttle valves.1 7) If necessary throttle the vent valve so that the backpressure_never_exceeds 75 psi 8) After the backpressure gauge drops back to zero vent another sample bomb. 9) Repeat steps 5 through 8 until all the connected sample'bombs are vented. 10) When all the bombs are vented, turn off the nitrogen throttle valve. 11) When the backpressure gauge reads zero and all the frost has disappeared from the lines, close all the lower VCM vent valves and the lower sample bomb valves. 12) Open the hood and disconnect the bombs. CCR 000032085 FI c*+ RELOCATION OF LA60CATOC.Y SAMPLE VEN7 Sample liquid van venting PaocfouRE AAP OCTOQP* PROCEDURE FOR STEAMING A SAMPLE BOMB i 1} Close the dry steam valve and open the steam supply valve and condensate valve. -2}- When the line is cleared of condensate turn off the condensate and supply valves. 3) Connect the sample bomb as shown or if it does not fit into the holder connect with tubing leads. , 4) Open both valves on the sample bomb and the dry steam valve. 5) Close the hood. jj 6) Open the supply and steam out the sample bomb. t ' ;* i 7) Close the supply valve. '______ [ i__ 8) Open the hood and disconnect. j i i i < CCR 0008ZQ86 i i ii :\ i Ficuat 5 Afiocatioki op laboratory S/WPte vfut SAMPie. 6oM8 PRoctOURC A ftp OCTOZO? S , lrPLi MATERIAL REQUIREMENTS LABORATORY VCM VENT Pressure Gauge Service: Instrument Range: Operating Temperature: Location: VCM liquid or vapor O-lOO psig -7 to 100 t>F Lab vent hood on the bomb vent manifold Pipe (See attached piping material specifications for detailed mechanical specifications) Service: VCM vapor or liquid Size: 1 inch - schedule 80 Material: Carbon steel Insluation: Steam trace first 50 feet from lab buildi outlet. Steam trace low points in line. Other -Valves, fittings and tubing as shown on Figures 1 and 2. CCR 000082087 *Coi *ntal Oil Company Central Engineering Department fipi Size rft SMLR Sch. 60 ASTM A 106 Gr. B SMLS (Grade A for cold bending) 3~-6" Sch. 40 ASTM A S3 Gr. 8 SMLS r*-i2" Sch. 30 ASTM A S3 Gr. B SMLS 14"-24" Sch. 20 ASTM A S3 Gr. B SMLS Temp. F Press. Mm, 3.S-I-9- 100 275 200 240 300 210 400 180 500 150 600 130 ANSI B 16.5 Notes 1. See Gen. Notes 2. ASTM A-105-71 ling MatcrialSpccifications Specification No. Rating Temp. Range 150-lb. R.F. Carbon Sircl 30* toCOCTF Corrosion Allowance ,0.0..6.3 .m. 3rig.no! issue November 1967 Revision 7 Jete July. 1973 ' Vilm Size M/2" ft SMLR 2"-3" Gate 600-lb. screwed. FS.. O.S.& Y., bolted bonnet. 11-13 Cr. trim. Stellite seat. 9aie valve. (ASTM A-105-71). Vogt Cat No. 12111 <Co0002) 150-lb. R.P.. FS., O.S.&V., 11-13 Cr. trim reduced port wedge gate valve. (ASTM A-105-711. Smith 815 (Co-15092) 4--UP 1-1/2" ft SMLR 2" -- Up 1-1/2" ft SMLR 2"-Up 2" -Up V*1-1/2" r- 8" 150-lb., R.F., C.S.. O.S.&Y.. 11-13 Cr. trim, wedge gate valve, nickel alloy seat (ASTM A-216 Gr. VVCB). Pacific No. 150 (Co-1502-2) Globe BOOlb screwed, F.S., O.S.ftY., bolted bonnet. 11-13 Cr. trim, stellite seat, globe valve, (ASTM A-105-71). Vogt Cat No. 12141 (Co-8020-2) 150-lb. R.F., C.S.. rising stem. 11-13 Cr. trim, nickel alloy seat ring globe valve. (ASTM A-216 Gr. WC8). Crane Cat No. 143 XR (Co-1522-2) Check 600 lb. screwed. C.S.. 11 -13 Cr. trim, ball check valve. (ASTM A-216 Gr. VVCB). Vogt Cat. No. 54853 {Co-6040-21 150 lb. R.F., C.S.. 11-13 Cr. trim, swing check valve (ASTM A-216 Gr. WCB) Crane Cat No. 147X (Co-1541-2) 150 - lb. R.F., C.S.. Trim as designated below. Check valve (ASTM A-216 Gr. WCB) Mission "DuO-Chek'* (Co-1542-7) Fig No. Temp. Limit Fig. No. Temp. Limit 15SMF 250* F 1SSSF 500* F 15SVF 400* F 15SPF 1,100*F Ball Valves (Check press. temp, limits) 300 - lb. screwed, C.5., fire safe ball valve (ASTM A-216 Gr. WCB) Hills-McCanna type S-302-CS-F (Co-30G0-2) 150-lb. R.F..C.S.. fire safe, bail valve (ASTM A-216 Gr. WC8! Hills-McCanna type S-151-CS-F (Co-1560-2) *See under Notes for Valve Notes. Flanges Size 2" ft SMLR 3" - 12" 14" - 24" CARBON STEEL FLANGES PER ASTM A-105-71 150 lb. R.F. weld neck with Sch. 80 bore 150 - lb. R.F. weld neck with Std- bore 150 - lb. R.F. weld neck with Sid. bore -rs SMLR '3"-6" 300 - lb. R.F. weld neck with Sch. 80 bore 300 lb. R. F. weld neck with Std. bore * All control valves shall Iwvt 300 lb. R. F. flanks. Valve Notes: 1. Valve mmjfacturer and catalog numbers shown for con venience only. Conoco approved equals may also be used. 2. Include service and temperature data in valve specifications to insure proper gaskets, packing and trim are specified. 3. Valve parts in possible contact with anhydrous or aqueous ammonia shall not contain; zinc, aluminum, eopper or alloys thereof. Branch Connections HtAPEftSlZE 24 20 IT 1C 14 12' 10 * 1 8 i 4 3 T t ' :! 1 I J i i i J 1 7 IV i w iw -v w -Aw vv vv w vv \7 IV IV \Y ( w VV t w vv i V. v 1 tt 1 w .V 1 V, VV 1 VV t VV VV vv vv vV w vv V I -.V 1 V 1 T W 1: W T T1 1-1.7 w 2s Ws 3 3 fl s IV s s w Ss IV S s IV 1 V. 1 vv l vv 1 w S1s! s iSis S1sI s1s.s vv s JLi T 4 IS $ s s s s I s 1 s ill T S J 5 S S a 10 *7i S VV it 1r s $ 17 w S J * s s s s $is!S 1T| Si >t f si 1 TI a 1.2 * connectionsiwn tn. r.a oi IS v7 i ?| l P-U IS \v s T CO-;\ICl'OV sn'HtHs IMMl 74 T tat w- i*rrtiti4t. tnr.mru Note 2. Fittings Screwed or Socket Weld ASTM A-105-71.3000 lb. Bull Weld AS1M A-234. Gr. WPS Bolts end Gaskets See Gen. Notes S ft 6. CCR 00oa2osa Size Stud bull iff ASTM A 193 Gr. B 7 with two he> runs each iw ASTM A 194 Gr. 7H. Less than f lamp gaskets o be 1/ IG *n. athesius composition ring. r r*ft ir.n Hump sivitu to be nwal wound in accordance with API SWitdiMtbOl