1. The inspection and acceptance of
straight seam steel pipes shall be carried out by the technical supervision department of the supplier.
2. The supplier ensures that the delivered
straight seam steel pipe meets the requirements of the corresponding product standards. The purchaser has the right to conduct inspection and acceptance according to the corresponding product standards.
3.
Straight seam steel pipes should be submitted for acceptance in batches, and the batching rules should comply with the provisions of the corresponding product standards.
4. The inspection items, sampling quantities, sampling locations, and test methods of
straight seam steel pipes shall be following the provisions of the corresponding product standards.
5. As for the test results of
straight seam steel pipes, when a certain item does not meet the requirements of the product standard, the unqualified ones should be picked out, and from the same batch of
straight seam steel pipes, double the number of samples should be taken, and the unqualified items should be checked. recheck. If the re-inspection results (including any index required by the project test) are unqualified, the batch of
straight seam steel pipes shall not be delivered. The following inspection items are not allowed to be re-inspected when the initial inspection fails: 1) There are white spots in the low-magnification tissue. 2) Microstructure.
6. For
straight seam steel pipes with unqualified re-inspection results (including unqualified microstructures in initial inspection results, and re-inspection items are not allowed), the supplier may submit them for acceptance one by one; or re-heat treatment (the number of re-heat treatments shall not exceed two times) ), to submit a new batch for acceptance.
7. If the product standard does not make special provisions, the chemical composition of the
straight seam steel pipe shall be checked and accepted according to the smelting composition.
