Seamless steel pipe Certificate:ISO9001-2000, API , Out diameter:13.7-219.1mm, Wall thickness:1.65-35mm, Max length: 24m. Our main products' summary1) Cold drawn seamless steel tube2) Certificate: ISO9001-2000, API, 3) Standard: ASTM A210, ASTM-A192, ASTM-A213(T11/T12/T22/T5/T23 ), ASTM-A333, ASTM-A335(P11/P12/P22/P5/P23), ASTM-A519, ASTM-A106, ASTM-A53, ASTM-A179, API 5L , API 5CT, EN-10216, BS- ...