3PE coated steel pipe substrate material includes a spiral pipe, seamless and straight pipe joints. 3PE anti-corrosion seamless steel pipe substrate and molten plating liquid occurs in a complex physical and chemical reaction, the formation of a tightly structured zinc-iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, its ability is strong. 3pe reinforced anti-corrosion can be used for pipelines, thermal equipment, mechanical industry, petroleum and geological exploration, containers, chemical industry and special purposes. 3pe anti-corrosion pipeline steel pipe has a hollow cross-section, the length of which is much larger than the diameter or circumference of the steel. According to the cross-sectional shape is divided into round, square, rectangular and shaped steel pipe; according to the material is divided into carbon structural steel pipe, low-alloy structural steel pipe, alloy steel pipe and composite steel pipe; according to the use is divided into transport pipeline, engineering structure, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment with steel pipe; according to the production process is divided into seamless steel pipe and welded steel pipe, which seamless steel pipe and There are two kinds of seamless steel pipes: hot-rolled and cold-rolled (drawn); welded steel pipes are divided into straight seam welded steel pipes and spiral seam welded steel pipes. Polyethylene (3PE) and water vapor permeability, mechanical properties and good anti-corrosion coating of three-layer structure, the oil pipeline industry has been used.
The anti-corrosion layer of 3PE anti-corrosion steel pipe is a vital factor important for the life of buried pipeline, also through the material of some buried in our underground work for decades without corrosion, some years occurred information leakage, is the enterprise because no they use a variety of different external anti-corrosion layer.
3PE anti-corrosion generally consists of 3 layers.
layer of epoxy resin powder (FBE100um)
The second layer of structural adhesive (AD) 170 ~ 250um
The third layer of polyethylene (PE) 2.5~3.7mm.
3PE steel inspection process
3PE anti-corrosion steel pipe mother material before doing some anti-corrosion technology treatment need to these steel pipe outer surface can be shot blasting rust removal method treatment, and then the concrete exterior of the steel pipe face to face cleanliness and anchor depth study check whether students can meet the design requirements, does not meet the standard requirements with hand grinding wheel grinding. Wrap tape paper at the end of the tube, micro-dust treatment, medium frequency heating to the requirements of different temperatures, epoxy powder coating, adhesive extruder side winding, polyethylene wrapping, water cooling of anti-corrosion pipe, and then develop for analysis online EDM leak detection, pipe end for data processing, the qualified enterprise product information for spray marking, under the tube platform, stacking for shipment.