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Differences between ERW and EFW
ERW stands for Electric Resistance Welding. The welding method for ERW pipe and submerged arc welded pipe is significantly different. ERW uses a pressure welding method without filler metal, resulting in a weld that is not filled with other components. The high-frequency current skin effect and p...Read more -
17 major avoidance principles in the steel pipeline construction
1. The small steel tube makes the big tube: the small tube is easy to bend and the cost is low. 2. Branch pipes to main steel pipes: branch pipes are generally smaller in diameter. See Article 1 for the reasons for avoidance. Also, the scope and importance of branch steel pipes are not as importa...Read more -
The Difference Between Hot Rolled Steel Pipe And Cold Rolled Steel Pipe and Welded Steel Pipe
Hot rolled steel pipes are a type of steel pipe product that offers unique advantages. By refining the grain structure of the ingot, it can destroy the casting organization and eliminate microstructure defects, resulting in improved mechanical properties. Additionally, the market offers a variety...Read more -
Embroidery removal technology of submerged arc steel pipe
1. Cleaning Use solvents and emulsions to clean the surface of the steel to remove oil, grease, dust, smoothing agent and similar organic matter, but it cannot remove the rust, oxide scale, welding flux, etc. on the surface of the steel, so it is only used as an auxiliary in anti-corrosion homewo...Read more -
Basic requirements for packaging and transportation of seamless and welded pipes
Basic requirements for packaging and transportation of seamless pipes and welded pipes: 1. General requirements 1.1 The packaging should be able to prevent seamless pipes and welded steel pipes from loosening, deformation and damage during normal handling, transportation and storage. 1.2 If the p...Read more -
Several stages of mechanical expansion process of large diameter steel pipe
The steel plate is first pressed into a U shape in the forming die, and then pressed into an O shape, and then the inner and outer submerged arc welding is carried out. After welding, the diameter is usually expanded at the end of the full length, which is called the UOE welded pipe, and the one ...Read more