Manufacturing method for steel inter-anticorrosion-mouth-repair-free elbow
A manufacturing method and internal anti-corrosion technology, applied in pipeline anti-corrosion/rust protection, elbows, siphon pipes, etc., can solve the problems of anti-corrosion repairing of the inner wall of pipe elbow welds, affecting the life of steel pipes, safety and environmental risks, etc. problems, to achieve the effect of solving the bottleneck of anti-corrosion technology in the welding joint of steel pipe elbows, reducing pipeline anti-corrosion and construction costs, and prolonging the life cycle
Inactive Publication Date: 2017-09-22
山东胜利长龙管道科技有限公司 +2
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[0002] In pipeline welding anti-corrosion construction, it is necessary to carry out anti-corrosion treatment on the inner wall of the welding joint after each section of the pipeline is welded. This process is called "internal repair". Therefore, the internal anti-corrosion repairing of the elbow weldi
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[0025] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0026] The present invention includes the following contents:
[0027] (1) A pre-welded elbow welded at both ends of the elbow, with a stainless steel short pipe pre-surfacing on the inner wall of the pipe end, and a steel anti-corrosion-free repaired elbow coated with an anti-corrosion coating on the inner and outer walls of the elbow The manufacturing method of the tube; its structure is as ( figure 1 ), the bend radius is equal to 2D;
[0028] (2) The specifications of elbows with different outer diameters are specified in the table below:
[0029]
[0030] (3) Provides on-site connection methods;
[0031] Its specific implementation steps are as follows: ...
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The invention relates to a manufacturing method for a steel inter-anticorrosion-mouth-repair-free elbow. The manufacturing method comprises the following steps that the elbow is prepared; four short pipes with the same length are cut, and two of the short pipes are used as the short pipes for field connection; a stainless steel welding wire is used as a surfacing material, a stainless steel layer is arranged on the inner wall of one end of each short pipe in a surfacing manner, and anticorrosion alloy pre-mouth-repair layers are formed; and grooves and surfacing transition regions are machined; the non-surfacing ends of the two connecting short pipes are welded to the two ends of the elbow, and the straight pipe ends are formed; and during the field elbow connection, the other two short pipes are correspondingly welded to the straight pipe ends of the two ends of the elbow, anticorrosion coating is conducted on the inner walls of welding seams, and continuous anticorrosion layers are formed. The manufacturing method has the beneficial effects that the bottleneck problem of the steel pipeline elbow welding seam inner anticorrosion technology is solved, the internal anticorrosion factorization of the elbow welding seams is achieved, and the pipeline construction efficiency is improved; the pipeline corrosion prevention and construction cost is lowered, and the service life of the pipeline is prolonged; and the environment protection and safety risks caused by the corrosion leakage of the pipeline elbow welding seams are lowered.
Description
technical field [0001] The invention relates to the field of pipelines, in particular to a method for manufacturing a steel elbow without internal anti-corrosion repair, which solves the problem of anti-corrosion repair in the weld joint of the steel pipe elbow. Background technique [0002] In pipeline welding anti-corrosion construction, it is necessary to carry out anti-corrosion treatment on the inner wall of the welding joint after each section of the pipeline is welded. This process is called "internal repair". Therefore, the internal anti-corrosion repairing of the elbow welding joint has always been the technical bottleneck of the pipeline industry, which affects the overall life of the steel pipeline, especially the economic benefits of oil field gathering stations and petrochemical refineries where there are a large number of elbows. cause serious safety and environmental risks. Contents of the invention [0003] The purpose of the present invention is to aim at...
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Login to view more IPC IPC(8): F16L43/02F16L58/08F16L58/04
CPCF16L43/02F16L43/001F16L58/04F16L58/08
Inventor 田黎明穆学杰韩文礼庄衍武盖发宾刘志刚梅奇魏国李广华
Owner 山东胜利长龙管道科技有限公司
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