Crimping reformer pigtails

Forums Mechanical & Maintenance Static Equipment Crimping reformer pigtails

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  • #43517
    Participant

    Has anyone done an online crimping of reformer catalyst tube pigtails recently? Was it done with reformer feed gas still in operation? Does anyone have a reference for a contractor that has state of the art equipment and recent experience to safely crimp off a reformer catalyst tube while in operation?

    #43773
    Participant

    Dear Friend,

    Yes we had done it but not recently, few years back. The nipping was done by using in house resources.

    #43777
    Participant

    We have done crimping of Reformer pigtails using an external contractor. Not sure if this is still of interest to you.

    #43805
    Participant

    The experience that I’ve had with this sort of thing is to engage a specialist contractor with the right skill set, such as:
    https://www.teaminc.com/assets/PDFs/TEAM004_online_leak_sealing_repair_brochure_0219_WEB.pdf

    As it turns out, the job I witnessed was done with the reformer on line. However, the unit was designed to permit this. Applying current safety standards, I would expect that the work would have been done considerably differently. Especially with regard to documenting and managing the risks.

    This question has been asked and answered over at the Urea site:
    https://www.ureaknowhow.com/ukh2/round-table-1/24/815.html
    The article in that thread, Nipping of Reformer Tubes: Precautions and Mitigation of Incidents, Stevens, 2009, confirms my recollection and my concerns, including:

    quote :

    However, as a result of the high nipping frequency in 2008, the chances of a less perfect nipping apparently increased. During one nipping exercise the outlet pigtail ruptured and a fire occurred, fortunately without injuries.

    Apparently, one of the contributing factors to the incident was associated with pigtail material specification in terms of its ductility. So, it’s not a straight forward exercise and requires appropriate caution.

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