[MW:16669] Minimum Puff piece in piping

Dear Experts,

    I have used 150mm of puff piece in the spool of 34'' pipe as per the drawing but my QA Dept. tells that in piping we can't use 150mm of puff piece and they have suggested me to use a minimum of puff piece of the OD of the pipe id i.e. a length of 850mm.

Please give me the section on which the puff piece details is  mentioned in the ASME section.

With Regards,

SANTOSH KUMAR NAYAK

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