High intensity straight-line joint pipeline steel tube fabrication technique using high-frequency electric resistance welding
A technology of high-frequency resistance welding and manufacturing technology, applied in the direction of high-frequency current welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of reducing the life of the anti-corrosion layer, the manufacturing technology is in the development stage, and affecting the life of the pipeline, etc., to achieve low cost , high geometric accuracy of appearance and high production efficiency
Inactive Publication Date: 2009-07-08
中冶辽宁德龙钢管有限公司
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Problems solved by technology
Due to the internal and external weld reinforcement of the spiral submerged arc welded steel pipe, the anti-corrosion layer cannot fit well on the steel pipe surface when the steel pipe is anti-corrosion, thus reducing the service life of the anti-corrosion layer and thus affecting the life of the entire pipeline
In addition, the production speed of spiral submerged arc welded steel pipe is only on...
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[0034] The specific implementation manner of the present invention will be described in detail below in conjunction with the embodiments given by the accompanying drawings.
[0035] The pipeline steel pipe manufacturing technology adopting straight seam high-frequency resistance welding of the present invention includes the main process flow of the high-frequency straight seam welded pipe production line pipeline steel pipe production line: figure 1 As shown, 1-coil preparation, 2-feeding, 3-uncoiling shovel, 4-leveling, 5-cutting, 6-shear butt welding, 7-loop storage, 9-milling, 8- Collect scraps, 10-steel plate flaw detection, 11-forming, 12-steel pipe welding, 14-collect scraps, 13-scrape internal and external burrs, 15-1# pull out frame, 16-steel pipe online ultrasonic testing, 17-welding Seam annealing treatment, 18-2# pull out frame, 19-air cooling, 20-water cooling, 21-sizing and straightening, 22-marking, 23-cutting to length, 24-steel pipe output, such as figure 2 A...
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The invention relates to the manufacturing technical field of steel pipes for long-distance transport pipes for petroleum, natural gas, mineral powder and the like, in particular to a pipeline steel pipe manufacturing technology employing straight high-frequency resistance welding. Raw materials meeting requirements are purchased, wherein, the requirements comprise physical properties, chemical compositions and mechanical properties of the raw materials. The raw materials are inspected to determine whether the physical properties, the chemical compositions and the mechanical properties meet the requirements. The technology comprises steel pipe manufacturing preparation, determination of production line moulding process parameters, determination of welding process parameters and determination of auxiliary material parameters. The pipeline steel pipe manufacturing technology employing the straight high-frequency resistance welding can help manufacture 632.2X11.1-60 pipeline steel pipes, various performance indexes of the steel pipes meet the requirements of pipeline steel pipes (USA API SPEC 5L PSL2 44 Standard), the heights of an inside seam and an outside seam are identical with the pipe wall of a parent material, and the technology perfectly solves the engineering anti-corrosive difficulties. The straight high-frequency pipeline pipe manufacturing technology has the advantages of high manufacturing efficiency, fast speed and low cost.
Description
technical field [0001] The invention relates to the technical field of manufacturing steel pipes for long-distance transportation pipelines such as oil, natural gas, and mineral powder, in particular to a manufacturing technology of high-strength straight seam pipeline steel pipes using high-frequency resistance welding. Background technique [0002] At present, at home and abroad, the steel pipes used for pipelines such as straight seam high-frequency resistance welded pipes to transport oil, natural gas, and mineral powder are basically steel pipes with a diameter of less than 508mm. The geometric size of the steel pipe is controlled by the outer diameter. Straight seam submerged arc welded steel pipe or spiral seam submerged arc welded steel pipe. Due to the internal and external weld reinforcement of the spiral submerged arc welded steel pipe, the anti-corrosion layer cannot fit well on the steel pipe surface when the steel pipe is anti-corrosion, thereby reducing the li...
Claims
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Inventor 朱瑞华
Owner 中冶辽宁德龙钢管有限公司
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