Hongkehua Pipeline Equipment Manufacturing Co., Ltd. is a large specialized company that integrates research and development, production, and operation. The company can process and manufacture according to the special requirements provided by users, ensuring product quality, service quality, and making customers more satisfied. Welcome friends from all walks of life to visit for guidance and business negotiations!

Material analysis of 3PE anti-corrosion steel pipe
3PE anti-corrosion steel pipe base materials include seamless steel pipes, spiral steel pipes, and straight seam steel pipes. The three-layer polyethylene (3PE) anti-corrosion coating has been widely used in the petroleum pipeline industry due to its excellent corrosion resistance, water vapor permeability resistance, and mechanical properties.
Introduction to the anti-corrosion coating of 3PE anti-corrosion steel pipes
The anti-corrosion coating of 3PE anti-corrosion steel pipes is crucial for the service life of buried pipelines. For pipelines of the same material, some may not corrode after being buried underground for decades, while others may leak after several years. It's because they use different external anti-corrosion coatings.
3PE anti-corrosion generally consists of three layers of structure:
One layer of epoxy powder (FBE>100um)
Second layer adhesive (AD) 170-250um
Three layer polyethylene (PE) 2.5-3.7mm
In practical operation, the three materials are mixed and integrated into one, and processed to firmly bond with the steel pipe to form an excellent anti-corrosion layer. Its processing methods are generally divided into two types: winding and circular mold wrapping.
Advantages of 3PE anti-corrosion steel pipe
The coating of 3PE anti-corrosion steel pipe is an epoxy powder anti-corrosion coating in contact with the bottom layer and the steel pipe surface, and a copolymer adhesive with branched functional groups in the middle layer. The surface layer is a high-density polyethylene anti-corrosion coating. The 3PE anti-corrosion steel pipe coating, also known as the three-layer polyethylene anti-corrosion coating, is a new type of anti-corrosion steel pipe coating that cleverly combines the European 2PE anti-corrosion coating with the widely used epoxy powder anti-corrosion steel pipe coating (FBE) in North America. It has been recognized and used worldwide for over ten years.
3PE anti-corrosion steel pipe inspection process
Firstly, the anti-corrosion steel pipe is inspected, and various conditions are comprehensively tested to ensure that it meets the requirements for producing insulated steel pipes. Check whether the steel pipe is corroded, and remove the embroidery on the steel pipe. The next step is to insert the rust and anti-corrosion steel pipe into a polyethylene sleeve and perform pipe threading molding. After the head is repaired, polyurethane foam is injected into it to fully fill the gap. Inspect the anti-corrosion steel pipes and conduct finished product inspection on the completed insulated steel pipes.
Before performing anti-corrosion treatment on the 3PE anti-corrosion steel pipe base material, it is necessary to inspect and record the steel pipes entering the inlet platform, perform shot blasting and rust removal on the outer surface of the steel pipes, and then check whether the cleanliness and anchor depth of the outer surface of the steel pipes meet the requirements. If they do not meet the requirements, they should be polished and repaired with a hand grinding wheel. The pipe end should be wrapped with adhesive tape, treated with fine dust, heated to the required temperature at medium frequency, sprayed with epoxy powder, wrapped on the side of the adhesive extruder, and burned on the side of the PE extruder. The anti-corrosion pipes should be water-cooled, and qualified products should be marked by spraying. The pipes should be placed on the platform and stacked for shipment.