Industry News
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Forming method and connection type of large-diameter steel pipe
At present, the main production process of large-diameter steel pipes in my country is hot-rolled large-diameter steel pipes and thermally expanded-diameter steel pipes. The largest size of thermally expanded seamless steel pipes is 325 mm-1220 mm and the thickness is 120mm. T...Read more -
Comparison of advantages and disadvantages of spiral steel pipe and straight seam steel pipe
The weld seam of the spiral steel pipe is longer than that of the straight seam steel pipe. If the pipe length is L, the weld seam length is L/cos(θ). However, most of the defects of steel pipes are concentrated in the weld seam and the heat-affected zone. The long weld seam m...Read more -
What is the suitable temperature for welding straight seam steel pipe
Welding, also known as welding, is a manufacturing process and technology that can join metal or other thermoplastic composite materials such as plastics by applying heat, high temperature, or pressure. There are three welding methods: 1. Welding. The workpiece is heated to fo...Read more -
Classification and application range of welded steel pipe
Welded pipe, also known as welded steel pipe, is a steel pipe made of steel plate or strip steel after crimping and welding. Welded steel pipe has a simple production process, high production efficiency, many varieties and specifications, and less equipment investment, but its...Read more -
The processing method of large-diameter steel pipe and expression method of the pipe diameter
Expression of large diameter steel pipe diameter: 1. For water and gas transmission steel pipes (galvanized or non-galvanized), cast iron pipes, and other pipes, the pipe diameter should be expressed in nominal diameter DN; 2. For seamless steel pipe, welded steel pipe (straig...Read more -
The difference between galvanized steel pipe and plastic-coated steel pipe
1. Galvanized steel pipe to make the molten metal react with the iron matrix to produce an alloy layer so that the matrix and the coating are combined. Hot-dip galvanizing is to pickle the steel pipe first. To remove the iron oxide on the surface of the steel pipe, after pickl...Read more -
Welding treatment of thick-walled spiral steel pipe
Thick-walled spiral steel pipe is a method of arc welding under the flux layer, which is formed by using the heat generated by the arc burning between the flux and the welding wire under the flux layer, the base metal, and the molten wire flux. During use, the principal stress...Read more -
Causes of rust and corrosion of spiral steel pipes
Because spiral steel pipes are stacked outdoors, and most of them are buried in the ground when they are in use, they are easy to corrode and rust. To ensure the smooth flow of the pipes, the spiral steel pipe manufacturers must have strong corrosion resistance. . Once the pip...Read more -
Routine maintenance is required when using thick-walled steel pipes
Thick-walled steel pipes are widely used steel varieties. It directly affects the economic benefits and the lives of personnel. Every country in the world attaches great importance to the inspection of thick-walled steel pipes, and various non-destructive testing (NDT) methods...Read more