... 2.High quality (ISO 9001, API 5L ) 3. Max length: 24m Seamless Carbon Steel TubeCertificate:ISO9001-2000, API,Out diameter:13.7-219 ... length: 24m Our main products' summary1) Cold drawn seamless steel tube2) Certificate: ISO9001-2000, API,3) Standard: ASTM A210, ASTM-A192, ASTM ... /P5/P23), ASTM-A519, ASTM-A106, ASTM-A53, ASTM-A179, API 5L , API 5CT, EN-10216, BS-3059, DIN17175, DIN 2440, DIN2448/DIN1629 ...