... of transportation of gas,water,oill in oil&gas industry. API SPEC 5CT.Tubing is used in extracting petroleum & natural gas. casing ... J55\K55\N80\L80\P110(LTC),(STC),(BTC)API SPEC 5L PSL 1:A25\A\B\X42\X46\X52\X56\ ... . End Plain end, beveled end, Cut square , Grooved , Threaded and coupling, etc. Certification ISO , API, Mill Test CertificateMain marketUSA, Canada, Turkey,Europe ...