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Standard | Application | Model N0.of steel tubes | |
Seamless steel tubes for oil casing and tubing | API SPEC 5CT Standard of American Petroleum Institute | Seamless steel tubes for oil casing and tubing in oil wells | J55, N80, L80, P110 etc |
Seamless steel tubes for petroleum cracking | GB9948 Chinese national standard | Served as for furnace tubes, heat exchange tubes and pipelines in petroleum and refinery plants | 1n 9n 1Er!rMn 1rhMn 1f: hM0 etC |
Seamless steeI tubes for structures | GB, _r81 62 Chinese national standard | Seamless steel tubes for manufacturing pipelines. vessels, equipment and mechanical structures | 1 O, 20, 35、45, Q345, 1 5CrMo, 1 2Crl MoV,A53A, A53B, SA53A, SA53B, etc. |
ASTM A53 Standard of American Society of Testing Materials | |||
ASME SA53 Boiler and pressure vessel--c-Ojrde of ASME |
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