Standard: BS, JIS, GB, DIN, ASTM, API Standard: BS 1387, JIS G3463-2006, GB 5310-1995, DIN 1626, ASTM A106-2006, API 5L Grade SpecificationsSize: 1/8 to 48 inches Standard:GB/T8163, ASTM A53, ASTM A106, JISG3452, JISG3454, DIN1629, API5L Surface:Oiled or black paintcarbon steel seamless pipe1 Seamless pipe ApplicationLow and middle pressure fluid transportation pipelineCasing TubeBoiler ...