... , STD, SCH40, SCH60,SCH80S, XS, SCH80 etc.Length1m-24mStandardAPI 5L, API 5CT, ASTM A53, ASTM A252, ASTM A500, ASTM A795, BS1387 ... , STK400, STK490, STK500,STK540,STPG370, STPG410 etc.CertificateEN10217, EN10219, API 5L PSL1/ PSL2, KS 4602, KS3583, GB/T9711.1/2,etc ... Properties (Bending Test,Charpy-v Impact Test, Hydrostatic Test, X-ray Test, Ultrasonic Test)PackingSmall sizes packed by steel strips ...