Analysis of Hydrostatic Test Failure of High-frequency Welded Pipe and Relevant Quality Controls

Described in the paper are the processing flow of hydrostatic test failure of the HFW pipe， and specific countermeasures as proposed based on actual operation circumstances.Relevant analysis leads to the conclusion as follows.The said failure involves two quality elements，i.e.，weld and material.In case of the failure，the failure origin has to be firstly identified by means of fracture morphology and metallographic structure analyses，electron microscopic analysis and mechanical tests，and then based on the failure causes and failure distribution，the re-test scope is determined in a bid to ensure final quality of the HFW pipe.