Seamless steel pipe Certificate:ISO9001-2000, API , Out diameter:13.7-219.1mm, ... Our main products' summary1) Cold drawn seamless steel tube2) Certificate: ISO9001-2000, API, 3) Standard: ASTM A210, ASTM-A192, ... ), ASTM-A519, ASTM-A106, ASTM-A53, ASTM-A179, API 5L , API 5CT, EN-10216, BS-3059, DIN17175, DIN 2440, ... or L/C9) Min order: 5 tons API 5L Gr.B/ASTM A106 Gr.B/ASTM A53 Gr.B seamless steel pipe