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Seamless splicing steel pipe welded pipe production line with high precision of goods
Release time:
2022-09-22 10:47
Welded pipe production line General steel pipe according to the mode of production, divided into seamless splicing steel pipe and welded steel pipe two categories, the following to introduce welded steel pipe.
Welded steel pipe is a joint steel pipe, its production is the pipe material (thick steel plate and strip steel) through various forming methods bent into a standard cross-sectional shape of the size of the tube, and then the use of different welding process will be welded together to obtain a steel pipe process.
Compared with the welded pipe production line, seamless splicing steel pipe welded pipe has the advantages of high commodity precision, especially thickness precision, simple key equipment, small footprint, continuous production, flexible production, wide range of products and so on.
The production and processing technology of 1. spiral steel pipe is as follows:
1. The raw materials of spiral steel pipe are hot rolled strip steel coil, welding rod and flux.
2. Before forming, hot rolled strip steel shall be leveled, trimmed, planed, surface cleaned, transported and bent.
3. The welding gap control system is selected to ensure that the welding gap meets the welding requirements, and the pipe diameter, misalignment and welding gap can be strictly controlled.
4. After cutting into a single steel pipe, strict full inspection rules and regulations shall be carried out for the first three steel pipes at a time to check the physical properties of welding, organic chemical composition, fusion, surface quality of steel pipe and its non-destructive testing, so as to ensure that the funds can be announced for production after the pipe manufacturing process is accepted.
2. welded pipe production line of longitudinal submerged arc welding pipe:
Longitudinal submerged arc welded pipe (LSAW) is generally based on thick steel plate as the main raw material, through different types of forming process, the selection of both sides of the arc welding and post-weld diameter expansion process to produce welded pipe.
Key equipment are milling machine, pre-bending machine, forming machine, pre-welding machine, expanding machine and so on. At the same time, the forming methods of longitudinal submerged arc welding pipe are UO(UOE), RB(RBE), JCO(JCOE) and so on.
The thick steel plate is first rolled into a U-shape in the forming structure, then rolled into an O-shape, and then arc welding is carried out inside and outside. After welding, the diameter is usually expanded at the top or the total length category, which is called UOE welded pipe, and the diameter that is not expanded is called UO welded pipe.
The thick steel plate is rolled and bent to form, and then the inside and outside arc welding is carried out. After welding, the expanded diameter is RBE welded pipe or the non-expanded diameter is RB welded pipe. The thick steel plate is formed in the order of J-C-O, and the diameter is expanded to JCOE welded pipe or JCO welded pipe without expansion after welding.
Welded pipe production line
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