Industry News
-
Submerged arc steel pipe high-frequency welding process
Submerged arc steel pipe high-frequency welding process introduction: 1. The control of the weld gap: After rolling by multiple rollers, the strip steel is sent to the welded pipe unit. The strip steel is gradually rolled up to form a circular tube blank with an opening gap. A...Read more -
How to prevent decarburization of steel pipes
Once decarburization occurs in the production process of the steel pipe, it will affect the subsequent process, and also reduce the high-quality performance and service life of the steel pipe itself, so manufacturers usually take appropriate measures to avoid or solve this pro...Read more -
What are the standards for the storage of anti-corrosion steel pipes
1. The appearance of the storage and delivery of anti-corrosion steel pipes needs to be checked as follows: ① Check each root to ensure that the surface of the polyethylene layer is flat and smooth, without dark bubbles, pits, wrinkles, and cracks as a whole, and the overall c...Read more -
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