Definition:

Sour services steel pipe is applied for pipelines in the corrosive environment.

It will cause the leakage of oil and gas pipeline, some cases even explosion. Pipe corrosion has a big threaten to personal safety and environment pollution, so the production of sour service pipe is important.

Sour service pipe mainly used in H2S environment. While H2S is a harmful chemicals that mostly easy to generate the corrosion.

When partial pressure of H2S reaches 300 pa, the line pipes used shall have the anti-acid corrosion performance.Sour service pipe includes NACE pipe.

How to sour service pipe made:

API Spec 5L, the pipeline steel used for sour service pipe is purity fully-killed steel.

It shall be noted that, the high purity of steel can guarantee low S, P and other impurities.

The standard for the control and inspection of the inclusion shape of pipeline steel for sour service pipe is required because the hydrogen induced cracking caused by the inclusion is first determined in its form.

Chemical properties:

The content of C, P, S and carbon equivalent in the chemical composition of sour service pipe is relatively low than the normal line pipes, with a strictly control requirements.

Especially for the content S, it is extremely harmful element in the corrosion environments, so for sour service pipe should control S maximum 0.002.