Commodity:Seamless Steel Pipe Materail and standard 10, 20,35,45, ASTM A53 A106 A500, API, EN10219.EN10204,ST37.2 JIS3466 Commodity:Seamless steel pipe(carbon steel pipe, seamless steel tube)Materail and standard 10, 20,35,45, ASTM A53 A106 A500, API, EN10219.EN10204,ST37.2 JIS3466Commodity:Seamless Steel Pipe Seamless Steel Pipe(carbon steel pipes, seamless steel tube)