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This topic contains 6 replies, has 1 voice, and was last updated by  Anonymous 12 years, 8 months ago.

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  • #3978

    Anonymous

    I would like to know about the economics of decoking by pigging vs steam air decoking.
     
    The skin of pigged tubes is more than that of steam air decoked tubes. How can this phenomenon be explained because pigging is the best way of cleaning.
     
    Thanks & regards
     

  • #7336

    Anonymous

    Dan:
    I have been pigging heaters for over 13 years. When were the skin temps monitored? Was it at start up or into the run cycle?
    Roman Korpus D.D.Technology Inc.
    713-206-6112 

  • #7301

    Anonymous

    It is 3 months after the startup .

  • #7234

    Anonymous

    With being three month into a run cycle there can be a number of reasons the skin temps are high. It is difficult to know what is going on with out history from start up.
     
    Roman Korpus
    D.D.Technology.
    713-206-6112

  • #6536

    Anonymous

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  • #6285

    Anonymous

    Steam air decoking will clean the tubes better than spalling or pigging but steam air decoking is much more difficult and takes more time.  Furthermore, some sites have environmental issues with steam air decoking.  Lastly if you have significant solids in the feed , you must pig.  The solid fall ot in the upper radiant section or lower convection section of the heater.  Spalling and steam air decoking are not effective method with high solid feeds. Normally, I recommend spalling on a regular basis with periodic pigging and pigging on an opportunity basis. 
     
    Sim Romero
    210-764-1159

  • #6241

    Anonymous

    simo
     
    do you have email address, we want to talk to you

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