Oil casing pipe

1)Size: OD: 2-3/8~13-3/8

2)Grades: N80, J55, K55, L80

3)Standard: API 5CT & 5B

4)Thread type: STC, BTC, LTC

We have implemented stringent quality control tests system to inspect raw materials and examine products in every stage of the production :

* Size and surface inspection

* Non-destructive test

* Thread inspection

* Hydrostatic test

* Drifting test

* Physical and chemical analysis

* Hardness and pressure test