Now We can access Petroleum Community by domain www.petrolcom.net______________ website new domain www.petrolcom.net
  • .

  • Pig Launching & Receiving Procedures


    Pig Launching & Receiving
    Procedures
    Pig launchers are used to launch the pig into the pipeline* and pig receivers are used to receive the pigs after they have made a successful run. The choice of these pig traps will depend on the type of pig to be run and pipeline design conditions. Provisions in the station design should include handling equipment for pigs 20" and larger. Caution should be taken for liquid spillage from the pig traps.
    Typical Pig Launching Procedures

    The operational sequence described below is for general information only. It is not intended* nor should it be used* to train pigging system operators. Operating procedures will vary from one pipeline company to another. The following pig launching procedures can be used as a guideline for developing operating procedures.

    Since company policies vary regarding whether the pig launcher is left on stream or isolated from the pipeline after the pig is launched* the operator should verify that the trap is isolated from the pipeline and depressurized before commencing any part of the launch procedure.




    1. Make sure that the isolation valve and the kicker valve are closed.
    2. In liquid systems* open the drain valve and allow air to displace the liquid by opening the vent valve. In natural gas systems* open the vent and vent the launcher to atmospheric pressure.
    3. When the pig launcher is completely drained (0 psig)* with the vent and drain valves still open* open the trap (quick opening closure) door.
    4. Install the pig with the nose firmly in contact with the reducer between the barrel and the nominal bore section of the launcher.
    5. Clean the closure seal and other sealing surfaces* lubricate if necessary* and close and secure the closure door.
    6. Close the drain valve. Slowly fill the trap by gradually opening the kicker valve and venting through the vent valve.
    7. When filling is complete* close the vent valve to allow pressure to equalize across the isolation valve.
    8. Open the isolation valve. The pig is ready for launching.
    9. Partially close the main line valve. This will increase the flow through the kicker valve and behind the pig. Continue to close the main line valve until the pig leaves the trap into the main line as indicated by the pig signaler.
    10. After the pig leaves the trap and enters the main line* fully open the main line valve. Close the isolation valve and the kicker valve.
    11. The pig launching is complete.
    Typical Pig Receiving Procedures
    The operational sequence described below is for general information only. It is not intended* nor should it be used* to train pigging system operators. Operating procedures will vary from one pipeline company to another. The following pig receiving procedures can be used as a guideline for developing operating procedures.
    Since company policies vary regarding whether the pig receiver is left on stream or isolated from the pipeline* the operator should verify whether there is any internal pressure in the receiving trap before starting any part of the receiving procedures.





    1. Make sure the receiver is pressurized.
    2. Fully open the bypass valve.
    3. Fully open the isolation valve and partially close the main line valve.
    4. Monitor the pig signaler for pig arrival.
    5. Close the isolation valve and bypass valve.
    6. Open the drain valve and the vent valve.
    7. Check the pressure gauge on the receiver to assure the trap is depressurized (0 psi).
    8. Open the trap closure and remove the pig from the receiver.
    9. Clean the closure seal and other sealing surfaces* lubricate if necessary* and close and secure the trap (quick opening closure) door.
    10. Return the receiver to the original condition.









    This article was originally published in forum thread: Pig Launching & Receiving Procedures started by Mohamed View original post
    Comments 1 Comment
    1. 8000D's Avatar
      8000D -
      usefully for me
  • .

  • Recent Threads

    amdsleite

    Norwegian Standard NS 476 Needed

    Thread Starter: amdsleite

    Dear all*
    Does anyone have the Norwegian Standard NS 476 ”Paints and coatings - Approval and certification of surface treatment inspectors”?

    Last Post By: amdsleite Today, 06:08 AM Go to last post
    sultaan07

    ASTM 2016 Volume 3.01

    Thread Starter: sultaan07

    Hello Friends*

    I desperately indeed of ASTM 2016 Volume 3.01 Metals Mechanical Testing standards. Please help and send a link where I

    Last Post By: sultaan07 Today, 02:36 AM Go to last post
    BornToSin

    60 X 60 English Dictionaries # 22 - English <--> Urdu

    Thread Starter: BornToSin

    https://1fichier.com/?0zxw7e1gzl

    Last Post By: BornToSin Today, 02:35 AM Go to last post
  • Recent Activity

    partheep

    Iec 60502-2:2014

    Thread Starter: partheep

    Last Post By: abasy ali Today, 01:10 PM Go to last post
    frch112

    DNV Phast Risk 6.7 for download

    Thread Starter: frch112

    Last Post By: mpophale Today, 11:20 AM Go to last post
    viTRIfY13

    BRE Promax v4.0.16308 Download Link

    Thread Starter: viTRIfY13

    Last Post By: alwalid Today, 10:32 AM Go to last post
  • .

  • ..