3PE anti-corrosion natural gas straight seam steel pipe, straight seam pipeline steel pipe, spot manufacturer Guanghui Pipe Industry

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　　3PE anti-corrosion steel pipes for natural gas transportation have long been recognized by humans for their value in utilizing natural gas. According to historical records, in 61 BC, China had fire wells, also known as natural gas wells, in cities such as Lhasa. The Ming Dynasty's "Tiangong Kaiwu" also recorded in detail the use of bamboo pipes to transport gas as fuel. After the development of bamboo and wood pipes, cast iron pipes, etc., nowadays natural gas pipelines mainly use steel pipes, and the use of natural gas pipelines to transport natural gas has become the main way of transporting a large amount of natural gas on land. At present, the long-distance transportation of liquefied natural gas through pipelines at low temperatures is still in the experimental stage. Generally speaking, natural gas pipeline systems consist of two parts: pipeline gas transmission stations and line systems, the latter including pipelines, valve chambers along the line, pipeline communication systems, scheduling and automatic monitoring systems, etc. Among them, the natural gas transmission pipeline is assembled by connecting single pipes one by one, which is a continuous closed conveying system. From transportation, storage to user use, the natural gas is under pressure.

　　In China, there are relevant methods for the quality of 3PE anti-corrosion steel pipes for medium transmission pipelines. Among them, a steel pipe external annular cooling device has been announced in China, which has improved the cooling effect. However, it still cannot fundamentally overcome the quality defects and thinning of weld bead coating thickness caused by external cooling methods. The ideal method for reducing coating thickness and thinning is to cool from the inside of the steel pipe. The United States has released an internal cooling method for anti-corrosion steel pipes, which involves placing a water pump inside the steel pipe and spraying water onto the inner wall of the pipe during rotation. The cooling sequence of the steel pipe and anti-corrosion layer is as follows: steel pipe, FBE layer, adhesive layer, and PE layer. In the market, there are many types of pipeline materials, and seamless steel pipe is one of them. Compared with ordinary pipeline materials, seamless steel pipe has significant advantages. Therefore, this type of pipeline material is very popular in the market. Seamless steel pipe has a wide range of uses, which is also a significant advantage of seamless steel pipe. In China, the production scale of seamless steel pipe is constantly expanding, and the production of seamless steel pipe is also increasing. The efficiency has also been greatly improved.

　　The polyethylene used in 3PE anti-corrosion spiral steel pipes for gas transmission will undergo aging, discoloration, cracking, brittleness, or pulverization under the action of atmosphere, sunlight, and oxygen, losing its mechanical properties. At the molding processing temperature, the melt adhesion may also decrease due to oxidation, resulting in discoloration and stripe formation. Therefore, attention should be paid during molding processing, use, or material selection. Because polyethylene has the above characteristics and is easy to process and shape, the recycling of polyethylene has profound value. With the large-scale promotion and use of 3PE coatings, the matching joint materials have also rapidly developed. From the initial adoption of 3PE anti-corrosion technology for the Shaanxi Beijing pipeline and the Kushan pipeline, the development has progressed to the West East Gas Pipeline Project, the Shaanxi Beijing Second Line Project, as well as domestically produced three-layer radiation cross-linking structures, radiation cross-linking heat shrink sleeves, and heat shrink belts as the main and auxiliary situations. The three-layer structure of the reactive hot melt adhesive produced by the manufacturer of internal heat shrink materials has close performance to 3PE except for its inferior thermal performance.

　　How to achieve precise operation and management of 3PE anti-corrosion for natural gas transportation is key. Before using anti-corrosion steel pipes, relevant quality inspections need to be carried out. Therefore, some people may ask, what are the standards for quality inspection of anti-corrosion steel pipes? Firstly, external inspection should be carried out. Each anti-corrosion steel pipe should be inspected one by one, and its surface should be kept flat, presenting a bright paint film. The coating should also be uniform, without wrinkles, hollowing, or solidification. The glass fiber cloth mesh of the anti-corrosion layer should also be filled with topcoat Then there is thickness testing, with one sample taken every 20 pipes and checked using a computerized film thickness gauge. Three sections are measured at both ends and in the middle of each pipe, with four points on each section. The thickness of the thin points should meet the requirements of the anti-corrosion grade In addition, it is necessary to check the breakdown strength of the paint film by using direct current spark detection to inspect each one and ensure that there is no sparking phenomenon What we need to talk about here is the pipeline anti-corrosion construction process, which generally uses manual and electric tools to remove rust, remove oil stains, dust, welding slag and other corrosive substances on the surface of the anti-corrosion parts, and keep the surface dry and free of water stains.

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