... .Grade:J55,K55,N80,L80,P110 2.Type:API Tubing Pipe 3.Thread:STC,LC,BC 4.Standard:API 5CT ... 5.Place of Origin: Liaoning, China SPECIFICATIONSWell Casing and Tubing Pipe API 5CT Oil Casing PipeMaterials: J55, K55, N80 ... and accord with the requirements of API 5CT. API 5CT Tubing PipeMaterials: J55, K55, N80 1, N80 Q, L80, , ... request and accord with the requirements of API 5CT. Tubing and Casing Pipe