Change in Manufacturer for Plate Requires MPQT in Line pipe

[Murali Krishnan]

Dear Experts,

 

         One of the Manufacturer initially rolled the line pipe (API 5L) for the line item x ( dia 44" x 16.9 mm) with Voset Alpine plates, for the same manufacturer conducted Manufacturer Procedure Qualification test (MPQT) and the result found satisfactory. As there was not enough quantity of plates to complete the line item Manufacturer informed the line item x will be rolled after procuring the plates. Mean time manufacturer rolled for other line items of the same P.O with different sizes. Manufacturer received the plates from Sumitomo instead of Voest alpine to complete the partially rolled line item x ( dia 44" x 16.9 mm). In this case whether manufacturer shall conduct MPQT once again for the Sumitomo Plates for the line item x ( dia 44" x 16.9 mm) or elsae we shall conduct test unit only instead of MPQT. Please clear my doubt.

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G.Murali krishnan