Coated Line Pipe

Coated line pipe refers to pipes used in pipelines for transporting fluids (such as oil and gas) that have been coated with protective materials. The coating is applied to the exterior or interior of the pipe to enhance its durability, resistance to corrosion, and overall performance.

Pipes can be applied with coatings include OCTG(casing and tubing), seamless line pipe, ERW pipe, LSAW pipe, SSAW pipe, and other seamless or welded pipes and pipe fittings in different industries.

Main Categories Of Coating On Pipes

Fusion-Bonded Epoxy (FBE): This is a popular coating for line pipes. FBE provides excellent corrosion resistance and is applied by heating the pipe and then applying a dry powder that melts and forms a protective layer upon cooling.

Three-Layer Polyethylene (3LPE) Or Polypropylene (3LPP): This coating system consists of three layers—an inner layer of fusion-bonded epoxy, a middle layer of adhesive, and an outer layer of polyethylene (3LPE) or polypropylene (3LPP). It offers good corrosion protection and mechanical resistance for steel pipes applied.

Concrete Weight Coating (CWC): In certain applications, pipes may be coated with a layer of concrete to add weight and stability to the pipeline on the seabed. This is common in offshore pipeline installations.

Coating On Pipes And Standards

Quality Index Of External Coating Of Steel Pipes

The basic process to apply coating on steel pipes is as below:

Bottom layer → spraying → epoxy powder

Middle layer → extrusion coating → adhesive

Outer layer → Extrusion coating → PE/PP

To complete above process, the equipment needed:

Powder Spraying Room

Pre-processing→Powder spraying→Curing→Inspection→Finished product

Plastic Extrusion Equipment

Including plastic extruders, vacuum feeders, plastic dryers, frequency converters, temperature control cabinets, etc. Supporting equipment also

Vacuum Feeding Machine

PE Machine Head, Silicone Roller And Backet

Powder Recovery Device

Steel Pipe Shot Blasting And Rust Removal Machine

Steel Pipe Single Epoxy Anti-Corrosion

Steel Pipe Single Epoxy Anti-Corrosion

End Beveling Machine