... , XS, SCH80 etc. Length 1m-24m Standard API 5L, API 5CT, ASTM A53, ASTM A252, ASTM A500 ... , L415M, L450M, L485M, L555M, L625M, L690M, H40, J55, K55, M65, L80, C95, N80,Q125, S235GT, S195T ... STK540,STPG370, STPG410 etc. Certificate EN10217, EN10219, API 5L PSL1/ PSL2, KS 4602, KS3583, GB/T9711 ... end, beveled, cut square, grooved, threaded and coupling, etc. Surface Bare, varnished, black lacquer, Bitumen ...