Steps for acceptance of API 5L X56 PSL1 steel pipe

API 5L X56 PSL1 steel pipe shall be submitted for acceptance in batches, and the group approval rules shall comply with the relevant product standard API.

API 5L X56 PSL1 steel pipe inspection items, sampling quantity, sampling locations and test methods shall be in accordance with the relevant product standard API. The API 5L X56 PSL1 steel pipe can be sampled in batch according to the rolling pieces with the consent of the demander.

As to test results of API 5L X56 PSL1 steel pipe, if one item does not conform to the regulations of the product standard API, it should be picked out. And take double the number of samples from the same batch of API 5 l X56 PSL1 steel pipe, and make reinspection for the unqualified project. If the reinspection result (including any of the indicators required by the project test) is unqualified, the API 5L X56 PSL1 steel pipe of this batch shall not be delivered. When the following inspection items fail to pass the initial inspection, the reinspection shall not be allowed. A. white spots in low power tissues; B. Microstructure.