api coupling standard

The American Petroleum Institute, commonly referred to as API, is the largest U.Strade association for the oil and natural gas industry. It claims to represent about 400 corporations involved in production, refinement,distribution, and many other aspects of thepetroleum industry.

According to API 5CT,  Grade: K55/J55 N80 L80 P110,we specialize in this for many years ,with good quality and competitive price. We are the manufacture of steel oil pipes,including tubing,casing,drill pipe,pipe line,if you have our products in need please let us know as soon as possible.

Choose our product ,choose an easy way to safety and efficiency for your business and oil exploit. Contact us you can get the best price and service.


We'll do our best to support our clients business growth.