3PE Corrosion-Resistant Steel Pipe Coating Structure:

Epoxy Powder Coating (FBE > 100um) Layer 1

Double-sided Adhesive (AD) 170-250um

3-layer polyethylene (PE) 2.5～3.7mm. The three materials are integrated into one, forming a robust anticorrosive layer that is securely bonded with steel pipes.

Pipe diameter range: Φ60 to Φ1420.

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

Layer 1 Adhesive (AD)

PE di-layer, two materials fused into one, with each layer's thickness equal to that of three-layer PE.

3PE anti-corrosion steel pipe vs. 2PE anti-corrosion 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 anticorrosion, and are very suitable for application in the oil and gas industries. The production process is identical.

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 pipes. The epoxy powder offers excellent corrosion resistance, mechanical properties, and strong resistance to peel-off. Although it has the advantages of strict surface treatment, 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, and its service life can reach 40 to 50 years.

3PE Corrosion-Resistant Steel Pipe Production Process

The bare pipes undergo shot blasting for rust removal after being heated at medium frequency. After rust inspection, they are heated again and then coated at a certain temperature. The process starts with powder coating, followed by adhesive spray, and finally polyethylene coating. A strict leak check is conducted during the coating process. That's basically the production flow.