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Large-diameter welded steel pipe production process
1: Conduct physical and chemical inspections of raw materials such as strip steel coils, welding wires, and fluxes. 2: The head-to-tail butt joint of the strip steel adopts single-wire or double-wire submerged arc welding, and automatic submerged arc welding is used for repair welding after being...Read more -
The difference between thin-walled spiral steel pipe and thick-walled spiral steel pipe
The concept of thin-walled spiral steel pipe: the strip steel is fed into the welded pipe unit, rolled up by multiple rollers, and the strip steel is gradually rolled up to form a circular tube billet with an opening gap. Adjust the reduction of the extrusion roller to make the weld seam gap Cont...Read more -
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