... J55,K55,N80,P110 2.Type: API Casing Pipe 3.Thread: BTC 4.Standrad:API 5CT 5.Place of Origin: Liaoning, ... China SPECIFICATIONSOil Well Casing Pipe API 5CT Oil Casing PipeMaterials: J55, K55, N80 1, ... As your request and accord with the requirements of API 5CT. API 5CT Tubing PipeMaterials: J55, K55, N80 1, ... request and accord with the requirements of API 5CT. API Casing Pipe