Year1
- 规格：
- 108
- 壁厚：
- 4
- 长度：
- 12
>b Domestic anti-corrosion seamless steel pipe prices have risen suddenly [Fengyihai] Anti-corrosion seamless steel pipe
What is the development status of the physical manufacturer industry in recent years? Steel pipes are an important part of seamless steel pipes and steel products. It plays a major role in the development of the national economy. At present, the general trend of the development of the steel pipe industry in the world is: the growth rate of welded steel pipe production is faster than the growth rate of seamless steel pipes. The proportion of welded steel pipe production is much larger than that of seamless steel pipes. Hot-dip galvanizing competes for the market of seamless pipes in various fields. Among welded steel pipe types, R welded steel pipes dominate in terms of output, and compete for the market with straight seam submerged arc welded pipes and spiral submerged arc welded pipes in the fields of use in oil and gas long-distance pipelines and urban gas pipelines.
B
Anti-corrosion steel pipe: spray q to spray out plastic powder. Suction coating: use a vacuum pump to form a negative pressure in the pipe and suck the plastic powder in. Impregnation: store the plastic powder in a container, add the preheated base The tube is immersed in the powder and is rotated: the plastic powder is stored on the wall of the base tube. The rotating and rolling base tube makes the powder evenly distributed on the surface of the base tube and reaches a certain temperature. Therefore, after the plastic powder is on the tube wall, it is melted and coated on the tube wall. On the pipe wall, a coating is formed to form an anti-corrosion layer. The tightness of the bond between the inner coating and the base pipe is related to many factors, such as the type of heating equipment, heating method, fuel type, heating temperature, fineness of plastic powder, additive composition, etc., but the key is surface pretreatment. On the premise that the surface pretreatment reaches the standard, the comprehensive index is assessed by adhesion. Regarding the adhesion index of our country's standards, the original standard stipulated that it was on the low side and has now been increased (polyethylene coating/mm, epoxy resin coating is ~). This standard is close to developed. >
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> Water pipeline anti-corrosion steel pipe (please look for Guanghui) outer and inner sintered epoxy anti-corrosion steel pipe is an upgraded product based on a single-layer polyethylene outer and inner epoxy composite steel pipe. It is currently The most advanced form of steel pipe anti-corrosion for buried long-distance pipelines. It is a new anti-corrosion production line for fourth-generation large-diameter pipelines independently developed by Cangzhou Guanghui Company. The outer wall adopts the thermal fusion winding process. The bottom epoxy resin, the middle layer adhesive, and the outer polyethylene form a three-layer anti-corrosion layer. The inner wall adopts Thermal spraying epoxy powder anti-corrosion method, the powder is heated and sintered at high temperature and then evenly coated on the surface of the pipe to form a steel-plastic alloy layer, referred to as steel pipe, (the three-layer English letter "h" refers to polyethylene, refers to epoxy resin). The coating adhesion and coating thickness are greatly improved, and the resistance to collision and corrosion is enhanced. This product obtained the national utility model patent in 2007. Won the National Torch Project in 2016. The steel pipe fills the gap in the best anti-corrosion of domestic steel pipes. The price is almost the same as that of a single-layer polyethylene internally sintered epoxy composite steel pipe, and the corrosion resistance is doubled.
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