3PE Coating Structure for Corrosion-Resistant Steel Pipe

Epoxy Powder Coating (FBE > 100 um)

Two-layer Adhesive (AD) 170-250μm

2.5～3.7mm thick triple-layer polyethylene (PE). The three materials are integrated into one, forming a robust anti-corrosion layer that is securely bonded to the steel pipe.

Pipe diameter range: Φ60 to Φ1420.

2PE Corrosion-Resistant Pipeline with Double Layer PE Coating Structure

DI adhesive layer (AD)

Two-layer polyethylene (PE), two materials merged into one, with each layer having the same thickness as a three-layer PE.

3PE Coating Steel Pipe and 2PE Coating Steel Pipe Process Differences

1. Similarities between 3PE anti-corrosion steel pipes and 2PE anti-corrosion steel pipes

Both of these belong to the category of PE anti-corrosion, and are very suitable for application in the oil and gas industry. The production process is the same.

2. Differences between 3PE anti-corrosion steel pipes and 2PE anti-corrosion steel pipes

3PE coated steel pipes have an additional layer of epoxy powder compared to 2PE coated steel pipes. The epoxy powder offers excellent corrosion resistance, mechanical properties, and strong resistance to negative剥离. Despite its advantages such as strict surface treatment requirements, poor weather resistance, and higher water absorption rate, it is suitable for buried pipelines and submarine pipelines. The coating thickness is only 0.3 to 0.5 millimeters, with a service life of up to 40 to 50 years.

3PE Coating Pipeline Production Process

The bare tube undergoes a shot blasting rust removal process after being heated at medium frequency. It is then subjected to rust inspection and heated again. Once it reaches a certain temperature, it is primed for spraying operations, starting with powder coating, followed by adhesive spray, and finally polyethylene coating. A strict leak inspection is conducted during the spraying process. That's essentially the production flow.