... ,N80,P110 etc. 4.Thread:LTC,STC,BTC · API 5CT N80 oil casing pipe 1. Size:OD: ... take place.· Our company is professionally specializing in seamless pipe for more than 10years and we have our ... own factory.We maily export alloy pipe,carbon pipe,oil casing pipe,etc.we always have large amount ... delivery.We often cooperate with many outstanding Steel Pipe Plants such as TPCO, Hengyang Steel,Baotou Steel ...