API Pipes

The American Petroleum Institute (API), founded in 1919, is the largest petroleum and natural gas industry association in the United States. The main contribution of API is to develop a series of standards for oil and gas industry in accordance with legislative and environmental requirements. The purpose of standards is to help enterprises to improve efficiency and cost-effectiveness.

API 5L pipe production is currently using micro alloy heating treatment process. The production costs of seamless stainless steel pipe are significantly higher than the welding pipe and with the increase of steel grade, the limit of carbon content is more and more strict. At present, all the major manufacturers carry out research work in order to improve the corrosion resistance of the pipeline and ensure the stable performance in low and high temperature.