1.Production technology:Plain pipe-end upsetting- Austenite treatment-Quenching-Tempering-straightening-(Non-Destructive Testing)- Threading-Thread inspection-coupling MPI-phosphating-Coupling make up-Drifting-Hydrostatic testing-Measuring&Weight-Marking&Stenciling-Coating-Packing Casing and tubing-Transportation

2. Executive standards: API spec 5CT, API spec 5B

3. Specification range: 2-3/8″, 2-7/8″, 3-1/2″, 4″, 4-1/2″

WT: 4.24-16mm

4. Materials: H40, J55, K55, N80, L80, C90,T95 and P110

5. T&C: EUE, NU,IJ and Special Coupled.

6. Length: R1, R2, R3

7. Testing: NDT etc related rules of API 5CT and 5B

8. Packing: By bundles, seaworthy packing.

9. Application:Oil Tubing is widely used for transporting crude oil and natural gas to surface after drilling, which also bears pressure from exploration.