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The difference between submerged arc welded spiral steel pipe and straight seam high frequency welded steel pipe
The submerged arc welding spiral steel pipe uses continuous welding wire as the electrode and filler metal. During work, a layer of granular flux is covered in the welding area. The arc of the large-diameter spiral pipe burns under the flux layer to melt the end of the welding wire and the local ...Read more -
What environments are large-diameter steel pipes suitable for
1. Petrochemical: Crude oil, refined oil, petrochemical raw material, and finished product delivery pipes and oilfield pipe network. 2. Natural gas: submarine and onshore long-distance pipelines; gas pipelines at gas receiving stations; gas fields and urban natural gas pipeline networks. 3. Coal:...Read more -
Cooling form and construction introduction of large-diameter steel pipe
Cooling form of large diameter steel pipe: Large-diameter steel pipes are steel pipes with an outer diameter of 1000MM or more. Large-diameter seamless steel pipes are made of steel ingots or solid tube blanks that are perforated into capillaries, and then hot-rolled, cold-rolled, or cold-drawn. ...Read more -
The role of heat treatment of stainless steel pipe fittings
After stainless steel pipe fittings are processed by forming, welding and other processes, the molecular structure, magnetic properties, and physical properties of the metal have changed. Through the atmosphere protection solid solution process, the corrosion resistance affected after processing ...Read more -
Heating requirements for spiral steel pipes
Before the steel is hot rolled, heating the raw material not only improves the plasticity of the metal, reduces the deformation force, but also facilitates rolling. In addition, during the heating process of steel, some structural defects and stress caused by Tao ingots can also be eliminated for...Read more -
How to detect the corrosion performance of steel flanges
The use of steel flanges in industrial structural parts is mainly to improve the connection and keep the pipelines sealed without leakage. However, many steel flanges will corrode and age after being used for a period of time, thus losing their tightness. Therefore, it is very necessary to conduc...Read more