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According to the American Petroleum Institute standard APISPEC5CT 1988 first edition, casing steel grades are H-40, J-55, K-55, N-80, C-75, L-80, C-90, C-95, P- There are 10 types of 110 and Q-125. Th...

ASTM A53 is a carbon steel alloy, which can be used as structural steel or for low-pressure pipelines.  ASTM A53 (ASME SA53) carbon steel pipe is a specification that covers seamless and welded black...

ERW pipe standard are as follows:           API 5L, ASTM A53 B, ASTM A178, ASTM A252, ASTM A500/501, ASTM A691, ASTM A672           API 5L Standard aims to gas and water in oil and gas industry ...

High-frequency straight seam resistance welded steel pipe, abbreviated as ERW, is a hot-rolled coil that is formed by a forming machine, and uses the skin effect and proximity effect of high-frequency...

1. What is a boiler tube? Boiler tube refers to a steel with open ends and a hollow section, and its length is larger than that of the periphery. According to the production method, it can be pided in...

1. Different outer surfaces  It can be seen from the outer surface of the seamless steel pipe that there is no gap in the whole body; the welded steel pipe has a welding gap. 2. Different molding pro...