1. Seamless steel pipes shall be submitted for acceptance in batches, and the rules shall comply with the provisions of the product standards.

2. The inspection items, sampling quantity, sampling locations and test methods of seamless steel pipes shall be in accordance with the provisions of the corresponding product standards. With the consent of the purchaser, hot-rolled seamless steel pipes can be sampled in batches according to the rolling root array.

3. Test results of seamless steel pipes. When some of them does not meet the requirements of the standard, the unqualified items shall be singled out, and double the number of samples shall be taken from the same batch of straight seam steel pipes for unqualified items. If the re-inspection result (including any index required by the project test) fails, the batch of seamless steel pipes shall not be delivered. The following inspection items are not allowed to be re-inspected when the initial inspection fails: a. There are white spots in the low-power tissue; b.

4. Seamless steel pipes with unqualified retest results (including the unqualified microstructure of the initial test results and items that are not allowed to be retested) can be submitted for acceptance by the supplier one by one; ), Put forward acceptance with a new batch.

5. If there is no special provisions product standard, the chemical composition of the seamless steel pipes shall be accepted according to the melting composition.