Document pp66DXp9pK0GrxpL4De1j5xN6
Interoffice Communication
0. R. Holcomb
From
A1 Peek
Date October 11 , 1974 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 pressurebuildup 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
Approved
CC: RDG-JAD-JHM-GGD-JRH(4)-CEG-PLF-JSR-JCL
VVC 000002216
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 described 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 atthis point. The line is then routed as shown to an existing valved connection on the VCM samDling 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.
vvc 00000221*7
VVC 000002218
VVC 000002219
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H VVC 000002220
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1) Prior to operation check the backpressure. Gauge should read zero. (
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.
f 5)~ Open one of the lower VC?1 vent valves and the corresponding lower sample bomb ' valve.
6) Open the nitrogen supply and throttle valves.1
7) If necessary throttle the.vent valve so that the backpressure never_exceeds 75 psig
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.
VVC 000002221
Fl 60RE +
Relocation of lagocato^y sa^Pie vent
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U301D VCi'l VE/iTiNOi PftOCfc'OuRE.
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A1QTE: FOR PROCESS $PECJF[CAT/otfS
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PROCEDURE FOR STEAMING A SAMPLE BOMB
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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.
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6) Open the supply and steam out the sample bomb.
7) Close the supply valve.
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8) Open the hood and disconnect.'
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VVC 000002222
MOURE 5 RELOCATION OP LABORATORY SVWiPtE VEU T SAMPte. 6oM8 STEAMING* Procedure
ARP
OCTOf3B3
MATERIAL REQUIREMENTS LABORATORY" VCM VENT""'
Pressure Gauge
Service: Instrument Range: Operating Temperature: Location:
VCM liquid or vapor 0-100 psig -7 to 100 OF 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 building
outlet. Steam trace low points in lie.
Other
-Valves, fittings and tubing as shown on Figures 1 and 2.
VVC 000002223
Coi ntnl Oil Company Central Engineering Department
Fipa
Site ?**& SMLR
Sch. 60 ASTM A 10G Gr. B SMLS (Grade A for cold bending]
3" - 6" Sch. 40 ASTM A 53 Gr. B SMLS
8" -12" Sch. 30 ASTM A S3 Gr. B SMLS
14" - 24" Sch. 20 ASTM A S3 Gr. B SMLS
Tamp.
Prats.
Max. p.s.i.g.
100 200
300 400 500 600
275 240 210 180 150 130
ANSI B-16.5
Notes
1. See Gen. Notes 2. ASTM A-105-71
,)ing Material Specifications
Specification No. __ ... _
RatingTamp. Range
150- lb. R.F. Carbon Sled
30*to600*F
Corrosion Allowance
0.0G3 m.
Original Issue
November 1967
Revision 2
Date July. 1973 *
Valves
Size
1-1/2" & SMLR
2"-3"
Gate
800-lb. screwed. PS.. O.S.&Y., boiled bonnet, 11-13 Cr.
trim, Stellite seat, gate valve. IASTM A-105-71).
VogL Cat. N 0. 12111
(C-8000-2>
150-lb. R.F.. F.S., O.S.&Y.. 11-13 Cr. trim reduced port
wedge gate valve. (ASTM a-105-71).
Smith 815
(Co-1509-2)
4" - UP
1-1/2" & SMLR 2"-Up
1-1/2" & SMLR
r -up
2--Up
1"1*1/2" 2" -- 8"
1501b,. R.F., C.S.. O.S.&Y., 11-13 Cr. trim, wedge gate
valve, nickel alloy seal. (ASTM A-216 Gr. WCB).
Pacific No. 150
(CO'1502'2)
Globe
800-lb screwed, F.S.. O.S.&Y., bolted bonnet, 11-13 Cr.
trim, stellite seat, globe vaive^iASTM A-105-71).
Vogt Cat No. 12141
(Co-8020-2)
150-tb. R.F.. C.S.. rising stem, 11-13 Cr. trim, nickel alloy
seat ring globe valve. (ASTM A-216 Gr. WCB).
Crane Cat No. 143 Xft
(Co-1522-2)
Check
600-lb. screwed, C.S., 11-13 Cr. trim, ball check valve. (ASTM A-216 Gr. WC8I. Vogt Cat. No. 5-4853 (Co-6040-2)
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-1542-2)
Fig No. Temp. Limit
Fig. No. Temp. Limit
15SMF 250'F
15SSF
500* F
15SVF 400" F
15SPF
1.100*F
Ball Valves (Check press. - temp, limits) 300 - lb. screwed. C.S., fire safe ball valve (ASTM A-216 Gr. WCB) Hills-McCanna typeS-302-CS F (Co-3060-2)
150 - lb. R.F,. C.S., fire safe, ball valve (ASTM A-216 Gr. WCB) Hills McCanna type S-151-CS-F (Co-1560 2)
`See under Notes for Valve Notes.
Valve Notes:
1. Valve manufacturer 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, copper or alloys thereof.
Branch Connections
HEADER SI2E
24 20
n iv i ,y j< tv
i 1-1.7
is 3 2$ 4 39
w
s s
s
6 331 S
8 12 S to W s
512 Vf V.
IB ** 18 IV 20 vv ?4 1
s T
18 1G
YV W \v VV IV IV S ss ss S 39
Jd s J fl s
1
T
14 1 12 VV '
W ! IV Vi ' '.V
VI ! \v is
Si s S' s S1 s s; s s S Sl r
io I a 1 6
v
iV " 1 VV
V i v; l '.V
V 1 w 1 '.V si s 1s s1 S1s
5 | 5 1s s ! 5 1T 3IT | T|
4 3 ? i'
| i4 i 3
'.V V
.V 1 VV 1 VV T
VV .V w VV VV i T 1
w IV VV VV | T 1 Vj
w w VV
$r T
Note Srancn connections exceeds me ties ot
1 f1 '" fiiictiOfMl Oimeouoot aAd<t# rmnifTtum fiikl *eld IMUl Wl
W* rVdduJfi. Tnre^HtfW or Note 2.
Flanges Site
2" & 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. bora 150 lb. R. F. weld neck with Sid. bore
'2" & 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 shjll have 300 - lb. 0, F, flangcf.
Fittings Site
ALL
Screwed or Socket Weld ASTM A-105-71.3000 lb. Bull Weld ASTM A 234. Gr. WPB
VVC 000002224
See Gen. Notes 5 & Q.
Dolts end Gaskets
but Stud holt ih`< AS1M A 103 Gr. 6 ? with two hex nuts each per ASTM A 104 Gr.-2H.
Less than
r* r&
f lamp gaskets o be WIG in. sstivstoscomposition ting, ft.inijn vwl m to be Spiral wound in accordance with API