3PE anticorrosive steel tubes include seamless steel tube, spiral steel tube and straight pipe. The three - layer structure polyethylene (3PE) anticorrosive coating has been widely used in oil pipeline industry with its good corrosion resistance, moisture permeability and mechanical properties.

Introduction of anti-corrosion layer of 3PE anticorrosive steel pipe

The corrosion protection layer of 3PE steel pipe is vital for the life of buried pipeline, the same pipeline of materials, some buried in the ground for decades without corrosion, and some years have been revealed. It's because they use different layers of antiseptic.

3PE anti-corrosion is generally composed of three layers:

A layer of epoxy powder (FBE > 100um)

2 layer adhesive (AD) 170 ~ 250um

Three layers polyethylene (PE) 2.5 ~ 3.7mm

In the actual operation, the three materials are blended into one, which is formed into a good corrosion coating with the steel tube. It is generally divided into two types: winding type and round die.

Advantages of 3PE anticorrosive steel pipe

The coating of the 3PE anticorrosive steel pipe is exposed to epoxy powder anticorrosion coating on the bottom and the steel pipe surface. The middle layer is the copolymerization adhesive with the branch structure functional group. The face layer is high density polyethylene anticorrosive coating. 3 PE anticorrosive steel pipe coating (three layers of polyethylene anticorrosive coating), 2 PE anticorrosive coating is to Europe and North America widely used epoxy powder anticorrosive steel pipe coating (FBE) ingenious combination of a new kind of anticorrosive coating steel pipe. The world has been recognized and used for over ten years.

3PE corrosion resistant steel pipe inspection process

First, the anti-corrosion steel pipes are inspected, and the steel pipes are tested in a comprehensive manner to meet the conditions for the production of insulated steel pipes. Check if the steel tube is corroded, check and remove the embroidery on the steel pipe. The next step is to put the rust - proof steel pipe in the polyethylene tube, and the tube forming. Then it is patched and filled with polyurethane foam to fill the void and fill it fully. Check the anticorrosive steel pipe and test the finished products.

3 PE anticorrosive pipe parent metal before do anticorrosive processing need to enter into GuanPing steel pipe inspection, records, the outside surface of steel pipe shot blasting derusting, then on the depth of the cleanliness of the surface outside steel pipe and anchor lines check whether meet the requirements, does not conform to the requirements of qualified with the hand wheel grinding, and in the pipe wrapping tape paper, dust processing, medium frequency heating to the required temperature, oxygen ring at the end of the powder spray coating, adhesive side of extruder, PE extruder side bound to burn, anticorrosive pipe for water cooling, spray identification for the qualified products, under GuanPing, stacking momentum.