3PE Coating Steel Pipe

3PE Coating can make the life of the buried pipeline up to 50 years, at present, is considered to be the most most advanced in the world outside the pipe anticorrosion technology. The great da commodities rebound should be pronounce ding an intermediate rebound, iron ore, the original yuan oil, huang huang, gold is rebounding. Over the past few months big global da commodities rebound in different range, from the point of time series, the current commodity rally since the end of November, 2015, in 2016 January and February are influenced by domestic and overseas stock market plunged a slight adjustment, but after the Spring Festival goods rebound gradually into the climax. Financial markets rebound growing attention: to the goods part of gu investors to increase in the price of "logic" and cycle plate more bullish on; Bond markets for commodities is rising inflationary expectations and generally cautious. It is understood that in the early 1990 s, China's 3 PE anticorrosive equipment and raw materials are imported from abroad.

3 PE anticorrosive coating steel pipe anticorrosion layers for the life of the buried pipeline is vital, and the same material of pipes, some buried decades not corrosion, some leak in a few years. Outside is because they have adopted different anticorrosion layer. Polyethylene protective layer three layer structural steel pipe is also called the three layer PE (3 PE), is introduced from abroad advanced anti-corrosion technology in recent years. It's called the fusion bonded epoxy/extruded polyethylene protective layer structure, the structure is composed of three layers: it's called the fusion bonded epoxy/extruded polyethylene protective layer structure, the structure is composed of three layers: the underlying for fusion bonded epoxy (80 mu m or higher); The middle tier for adhesive (170-250 microns); Surface for extruded polyethylene (about 2 mm). The total thickness of protective layer of about 1.8 to 3.7 mm. In three layer structure, the main function of fusion bonded epoxy powder coating is: to form a continuous film, directly bonded with steel tube surface, has the very good resistance to chemical corrosion and cathodic disbonding resistance; Reactive response to form chemical bonding with the middle layer adhesive, ensure that the overall coating has good caking at higher temperatures. The middle layer is usually copolymer adhesive, its main composition is polyolefin, is currently widely used vinyl copolymer adhesive. Copolymer adhesive part polar functional groups and fusion bonded epoxy powder coating epoxy groups can react to generate hydrogen bond or bonds, middle layer and the bottom to form a good bond; Rather than polyethylene vinyl section and surface polarity has the very good close cooperation with, so the middle layer and the surface also has the very good performance.

3 PE coating thickness

Uneven thickness mainly displays in the circumferential direction of the distribution of each side of the uneven thickness of the test points. In the industry standard SY/T0413-2002 of thickness uniformity without rules, the provisions of the thickness of the coating is the most I low value, 3 PE anticorrosive coating steel pipe, but it requires the coating of the thickness of the low value I cannot under the the thickness of the low value, I rather than multiple test points average. 3 PE coating if uneven thickness of coating process, will inevitably cause the butcher material waste, this is because the coating thickness to ensure the thinnest place I low standard, the thickness of the thick part will be larger than the thickness of the coating standards. Also under the condition of uneven coating is easy to cause the thinnest of 3 PE anticorrosive steel pipe coating thickness can not meet the standards. Appeared in the process of production of unequal thickness reason mainly with a few a few mouth touch discharge inequality, steel tube bending. Control of 3 PE anticorrosion pipeline uneven coating is an effective method to adjust a few mouth extrusion die several anticorrosive coating thickness as evenly as possible, not qualified carbon steel pipe on-line coating methods such as strategy.