Procedure for acceptance of dsaw pipe

1. The quality inspection of the dsaw pipe shall be carried out by the technical quality supervision of the supplier.

2. The supplier must ensure that the delivery of the dsaw pipe meets the specifications of the corresponding product standard. Providers have the right to check and verify the corresponding product standards.

3. DSAW pipe should be submitted in batches to check, the batch rules should be consistent with the corresponding product standards.

4. DSAW pipe inspection items, sampling quantity, sampling parts and test methods, according to the corresponding product standards. 

5. DSAW pipe test results, one does not meet the product standards of the rules should be unqualified pick out, and from the same batch of dsaw pipe, take the double the number of samples, reassessment of unqualified items. The results of the re-inspection (including any of the requirements of the project test) failed, then the batch of dsaw pipe shall not be delivered. The following inspection items, if the test is not qualified, it is not allowed to re-check: a. There are white spots in the low magnification organization; b. Microstructure.

6. dsaw pipe for the unqualified test results (including the project with the initial test effect of microstructure failure, which is not allowed to be re-inspected) shall be submitted for inspection by root; or heat treatment from the head (the number of heat treatment from the head second), with a new batch of inspection.

7. If the product standard is not curious rules, dsaw pipe chemical composition by melting components for inspection.