Both the pipe coating and the pipe lining can protect the pipe from corrosion.So what are the differences between pipe coating and pipe lining?

Plastic lined flanged pipes finished in Haihao Group

What is pipe lining?

A pipe lining is what covers the interior of the tubing and protects the inside of a pipe from corrosion or wear from the inside-out.Pipe lining is something like a pipe within a pipe.For eg: pipe lining can be cement,PVC etc.These are used for specific services.Cement lined pipes are usually used to carry water and PVC lined pipes are mostly used to carry corrosive substances. Pipe coating is done both on the inside and outside to prevent contact between the base pipe material and item carried.

To expand on this, lining is a way to restore an older pipe to gain more years of service after a major scouring of fouling for example. It restores the interior surface smoothness, often smoother than new pipe and less prone to collecting deposits or tuberculation.

3PE anti corrosion coating steel pipes

What is pipe coating?

The external pipeline corrosion can mainly due to the surroundings,such as acid soil,wet conditions and so on.Factors that lead to internal corrosion are the oxygen content,temperature,pressure and flow rate of the liquid carried in the pipelines.Due to the above reasons,the anti-corrosive pipeline coating can be put into two corresponding categories,the internal and external corrosion-resistant coating.Commonly used coatings are FBE,3PE,2PE,polyethylene coating,petroleum asphalt,epoxy coating,etc.

Haihao Group supply seamless steel pipes,welded pipe fittings,butt welding pipe fittings,forged pipe fittings and forged flanges more than 30 years,we can supply both coating and lining for pipes and fittings.If you want to know more about our pipeline products,please email us:sales@haihaogroup.com