2pe anti-corrosion steel pipe manufacturers anti-corrosion steel pipes to develop the market

Anti-corrosion steel pipe manufacturer [Consultation Hotline Manager Bi] Hebei Tianze Pipe Industry Co., Ltd. specializes in the production of steel pipe insulation and anti-corrosion products. It is a governing unit of the Hebei Anti-corrosion Spiral Steel Pipe manufacturers Industry Association. It was founded in 2007 and has an annual production capacity of 10,000 square meters. The company's main business is: Anti-corrosion steel pipes, anti-corrosion steel pipe factories, anti-corrosion manufacturers, anti-corrosion buried steel pipes, anti-corrosion seamless steel pipe prices, reinforced anti-corrosion straight seam steel pipes, special anti-corrosion steel pipes for oil and gas drainage pipelines. Welcome to call us for consultation and cooperation. The factors that affect the performance of the corrosion layer of steel pipes are relatively large. There are many factors, such as the layout of each process, equipment selection, surface quality, heating method, coating temperature, cooling method, transmission accuracy, material characteristics and testing, etc. Poor control will lead to low coating adhesion, too thin, Defects such as cracks or bubbles, strict implementation of standardized and scientific operating methods is crucial to control defects and ensure the yield of anti-corrosion pipes [].
Chinese patent []. (An anti-corrosion water cooling method for steel pipes) has announced an external annular cooling device for steel pipes. The cooling effect has been improved, but it still cannot fundamentally overcome the quality defects and welding problems caused by the external cooling method. The coating thickness is reduced. Literature [] points out that the ideal method to reduce coating thickness is to cool from inside the steel pipe.
U.S. Patent B discloses an anti-corrosion internal cooling method for steel pipes. This method puts a water pump inside the steel pipe and sprays water on the inner wall of the steel pipe during the rotation of the steel pipe. The cooling sequence of the steel pipe and anti-corrosion layer is: steel pipe, layer B , adhesive layers and layers. The steel pipe has a fast heat transfer rate, which can quickly cool the steel pipe and coating. At the same time, because the cooling process of the anti-corrosion layer is from the inside to the outside, the anti-corrosion layer adheres better to the pipe wall when it shrinks during cooling, and the hoop stress of the anti-corrosion layer is very small. , the anti-corrosion layer on the weld bead is slightly thinned, thereby improving the anti-corrosion quality and reducing raw material costs. However, this internal cooling method is difficult to implement.
Coating systems are introduced. In this process, the epoxy powder, adhesive layer and/or layer are all coated on the surface of the steel pipe through electrostatic spraying, which can form a hierarchical structure with continuous transition between the layers. There is no obvious interface between the layers and the bonding force is stronger. , the coating thickness is more uniform, and can eliminate the holes in the welding top and welding feet, reducing the hoop stress of the anti-corrosion layer. The U.S. patent announced this H process in 2016 and has achieved good results in engineering applications. However, due to the slow heat conduction of the powder, it is difficult to obtain a thick coating with the H process, and the mechanical properties are not as good.
Canada's Baishao Company has developed a new multi-layer polyolefin coating process that perfectly combines the advantages of the H process (uniform coating with hierarchical structure) and the advantages of traditional processes (cheap, thick coating, excellent mechanical properties) [ ]. Dr. Guan Shiwei mentioned this multi-layer polyolefin anti-corrosion system with innovations in materials and construction process control in his report at the high-level forum on technology and equipment for CNPC's key pipeline projects[]. The following is an introduction to the new multi-layer polyolefin coating process.