Method for punching and welding composite tube instrument nozzle
A welding method and technology for composite pipes, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as complex processes, and achieve the effects of improving economic benefits, ensuring integrity, and reducing costs
Active Publication Date: 2017-11-28
SICHUAN GASOLINEEUM CONSTR ENG
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Problems solved by technology
[0004] The main technical problem to be solved by the present invention is to provide a composite pipe instrument nozzle opening and welding method. By changing the processing technology, the integrity of the corrosion-resistant layer of the corrosion-resistant alloy pipeline at the branch pipe is guaranteed, and at the same time, the problem of complex process is effectively solved.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The following specific examples further illustrate the present invention.
[0022] A composite pipe instrument nozzle opening and welding method, comprising the following steps:
[0023] A1. Choose carbon steel pipe or low-alloy steel pipe as the base layer, and the corrosion-resistant alloy pipe as the cladding bimetal composite pipe; the corrosion-resistant alloy is nickel-based alloy.
[0024] A2. Open a surfacing groove on the surface of the composite pipe, the surfacing groove penetrates the base layer and forms a blind hole in the cladding layer, and refills the surfacing groove through surfacing welding to form a welding layer; the resulting surfacing groove needs to be removed The remaining thickness of the cladding shall not be less than 1mm for all base metals. During surfacing welding, if the pipe wall thickness is 20mm and above, automatic surfacing welding is used; if the pipe wall thickness is less than 20mm, manual tungsten argon arc welding is used, and...
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Abstract
The invention discloses a method for punching and welding a composite tube instrument nozzle. The method comprises the steps: A1, selecting a carbon steel pipe or a low-alloy steel pipe as a substrate, and a corrosion resistant alloy pipe as a bimetal composite pipe of a cladding; A2, forming a surfacing groove penetrating trough the substrate on the surface of the composite pipe, forming blind holes in the cladding, refilling the surfacing groove through surfacing and forming a welding layer; A3, performing secondary punching to the surfacing groove formed in A2, the holes penetrate through the welding layer and the blind holes of the cladding; and A4, inserting and welding a branch outlet into the through holes formed in A3. With the method disclosed by the invention, through changing the processing technology, the completeness of the corrosion resistant layer of the corrosion resistant alloy pipe at the branch position is ensured, and at the same time the problem of complex technology is solved effectively.
Description
technical field [0001] The invention relates to the technical field of pipeline manufacturing, in particular to a composite pipe instrument nozzle opening and welding method. Background technique [0002] In the existing technology, with the development of oil and gas projects at home and abroad, it is found that the medium conditions of most oil and gas field projects are becoming more and more complicated, especially the large-scale gas field projects developed in recent years present "high output, high temperature, high pressure, high Contains H 2 S, high content of CO 2 , high chloride ion” characteristics, the medium is highly corrosive, and the operation risk is high. In order to improve engineering reliability and life-cycle economy, such gas field development projects basically use bimetallic composite pipes as anti-corrosion solutions, so it is necessary Make technological breakthroughs and improvements in all aspects. [0003] Especially for the pipe to be drill...
Claims
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IPC IPC(8): B23P15/00B23K31/02
CPCB23K31/02B23P15/00
Inventor 杨昕曹云何洪勇邹德辉余尚林徐放魏群坤
Owner SICHUAN GASOLINEEUM CONSTR ENG