carbon steel pipe seamless steel pipe with API 5L PSL1 and PSL2 ASTM A106,ASTM A53 1/4 inch to 30 inch.W.T max ... 50MM carbon steel pipeAll of the ... accordance with the international standards such as TS, DIN, AWWA, ASTM, BS, UNI, JIS, GOST, ANSI, ISO.The range of ... 1/4 inch-30inch W.T 1.25mm to 50mm,(2) ERW/LSAW/DSAW OD 1/2inch-52inch W.T 1 ...