... , DIN, EN, ISO, GB, SH AND HGMaterial Carbon, Stainless, AlloyCertificate API, ISO9001: 2000, CCSPacking wooden cases or customerizedProduction Capacity 11000 tons ... Range: Seamless steel tubes/ pipes, Cold drawn steel tubes/ pipes, API SPEC 5L pipes, MATERIALCarbon Steel Tubes/PipesST 37, ASTM A106 ... Gr B; A53, A210; API 5L X42, X46, X52, X56, X60, X65, X70, X80 1 ...