API Steel Pipe Fittings 1.Grade: J55,K55,N80,L80,P110 2.OD: 2- ... : API 5CT 4.Place of Origin: China API stainlees carbon Steel Pipe Fittings ———————————————————————————————————————— Features—————————————————————————————————————————————GRADE: J55, K55, N80-1, N80-Q, L80, C90 ... Co., Ltd. in April 2011. (Formerly known as YingKou OuYang Steel Tube Co., Ltd.)YingKou OuYang Metal Manufacturing Co., Ltd. is ...