1. The domestic seamless pipe supplied according to the performance of the mechanism, the ordinary carbon steel is manufactured according to the class A steel of GB/T700-88 (but must ensure that the sulfur content does not exceed 0.050% and the phosphorus content does not exceed 0.045%), and its mechanical The performance should conform to the values specified in the GB8162-87 table.
2. The domestic seamless pipes supplied according to the hydraulic test must ensure the hydraulic test specified in the standard.
3. The physical property inspection of imported seamless pipes shall be carried out according to the relevant standards stipulated in the contract.
