3PE anti-corrosion steel pipe
Material Analysis of 3PE Corrosion Resistant Steel
3PE corrosion-resistant steel base metal including seamless steel pipe, spiral steel pipe and straight seam steel pipe. The three-layer polyethylene (3PE) anticorrosive coating has been widely used in the petroleum pipeline industry for its good corrosion resistance, water vapor permeability and mechanical properties.
Introduction of anti - corrosion coating of 3PE anti - corrosion steel
3PE corrosion-resistant steel pipe for a buried pipeline life is critical, the same material pipes, and some buried in the underground for decades without corrosion, and some years to leak. It is because they use a different outer coating.
3PE anti-corrosion generally consists of three-tier structure:
The first layer of epoxy powder (FBE> 100um)
The second layer of adhesive (AD) 170 ~ 250um
The third layer of polyethylene (PE) 2.5 ~ 3.7mm
The actual operation will be three kinds of materials blend into one, after processing to make it firmly with the steel pipe to form an excellent coating. The processing methods are generally divided into two types of winding and round-type coated.
3PE anti-corrosion steel pipe anti-corrosion layer of the advantages
3PE corrosion-resistant steel pipe coating is the bottom surface of the contact with the steel pipe is epoxy powder anti-corrosion coating, the middle layer with branched functional groups of copolymer adhesive. The surface layer is a high-density polyethylene anticorrosive coating. 3PE corrosion-resistant steel pipe coating that is (three-tier polyethylene anti-corrosion coating), is the European 2PE coating and the widespread use of epoxy powder coating in North America (FBE) clever combination of a new anti-corrosion Steel pipe coating. Has been recognized and used in the world has been more than a decade.
3PE anti-corrosion steel pipe inspection process
First of all, the corrosion of steel pipe inspection, a variety of conditions to test the steel pipe, making it in line with the conditions of production of steel pipe insulation. Check the pipe is not corroded, check and remove the embroidery on the pipe. The next step is to rust after corrosion of steel pipe sets in the polyethylene casing, the wear pipe molding. However, after the head repair, in which the injection of polyurethane foam, to fully fill the gap, so that full filling. Inspection of anti-corrosion steel pipe, the completion of the production of finished steel pipe insulation test.
3PE anticorrosive steel pipe base material before doing anticorrosive treatment need to enter the pipe into the tube platform inspection, recording, the outer surface of the steel pipe shot blasting, and then the outer surface of the steel pipe cleanliness and depth of check whether the line to meet the requirements, Do not meet the requirements of hand grinding grinding repair qualified, in the pipe winding paper tape, dust handling, IF heating to the required temperature, epoxy powder coating, adhesive side of the extruder winding, PE extruder side entanglement, anti-corrosion Tube for water cooling, the qualified products for spray identification, the next tube platform, stacking to be shipped.
