... , SCH40, SCH60, SCH80S, XS, SCH80 etc. Length 1m-24m Standard API 5L, API 5CT, ASTM A53, ASTM A252, ASTM A500, ASTM A795, BS1387 ... . Material/Steel grade A, B, X42, X46, X52, X56, X60, X65, X70, L175, L175P, L210, L245, L290, L320, L360, L390, L415 ... , STK400, STK490, STK500, STK540,STPG370, STPG410 etc. Certificate EN10217, EN10219, API 5L PSL1/ PSL2, KS 4602, KS3583, GB/T9711.1/2,etc. End Plain ...