Document bBbagY2z4E79qbBV12L6jG6

(conoco) Interoffice Communication To ' Distribution From o. w. Ware Date August 22, 1980 subject Railcar Loading/BL-410 Meetings The subject fneetings have been completed with the appropriate personnel from all shifts. The attachments reflect information collected during the meetings which will hopefully clear up some misunderstanding with respect to breathing air use on the rack and' lead to the improved operation of BL-410. Please let me know of any further problems or questions which come up. J. W. Ware is CC: C. Landon c. Kroske K. Cash C. Bui 1er C. Brown E. Gould J. Vickers D. Ross R. Fox C. Turner M. Powers R. Young P. Ceasar B. Wilburn M. Fontenot F. Broxton L. Barron B. Bauer A. C. Hughes cm 000009361 VINYL LOADING BREATHING AIR REQUIREMENTS Task Breathing Air Breathing Air not 'Req11 d Req'd Remove plugs X Break thermowell cover Remove sample tap plug X X Remove dipstick cover X Put nipples in (install new teflon tape if needed) X Hook up loadinq hoses (qood O-rinqs) X Pressure upw/J^ for .leak _check __ Check 09 at sample tap X X Start loading X Car nears correct outage-sample it X Car reaches correct outage X S/D loadinq X Take final O9 on vent arm Push liquid into car w/ N? X X Purqe liquid line into car X Vacuum/pressure purqe lines Block off loadinq hoses X X Depressure loadinq lines Disconnect hoses Remove nipples X X X Install plugs w/ new teflon tape X Shut off breathing air X CUH 000009362 CONOCO STANDARD BREATHING AIR REQUIREMENTS VINYL CHLORIDE Whenever equipment is opened wh.ich does contain vinyl chloride, has ever contained vinyl chloride or could possibly contain vinyl chloridebreathing air use is required. V CWH 000009363 Process FIow Diagram BL-410 Solis^cji Ti i rsi"re.'S.c.Gjo us.^ Operating Notes [1) Turn the start switch off before pressing reset buttons. (2) An appropriate level in the intercooler is important because: (A) It cools the gas feed to the second stage (B) It cools the liquid going to the overhead condenser (C) It prevents liquid from entering the suction of the second stage (_D) It provides a feed to the oil recovery pot A level controller attached to the side of the intercooler controls the intercooler level. Monitor this level on a routine basis. The appropriate level should be stable in the intercooler even when the unit is shut down. (.3) The oil level in the crankcases of the low and the high stage compressors is important. You should be able to see a level in the sightglasses at all times, even when the unit is shut down. [4) The oil recovery pot located on the skid immediately southwest of the intercooler has a level indicator on -it. It normally runs V4 to */2 full. If an oil problem develops it may be traced to a low or high level in this pot. CUH 000009364 BL-410 Operating Notes (continued) (5) The fin-fan cooler is critical. Be sure it comes on when you start the unit. If it doesn't you will blow a relief valve on the receiver. It only takes a few minutes to loose a lot of Freon through a relief valve. (6) The relief valves (2) on the receiver, once blown, sometimes will not re-s-eat on their own. Stroke the valve under the relief valves all the way in or all the way out to switch relief valves to stop one from blowing. (7) The level of Freon in the overhead condenser is critical to stable unit operation (rule-of-thumb setpoint on the controller is 1.5). Too high a level with a heavy vent rate will overload the low stage compressor and increase the high stage discharge pressure. Too low a level will.give you no cooling in the condenser. CUH 0000093^5