Metallurgy welding method of double-metal mechanical compound pipe ends

A technology of composite pipe and bimetal, which is applied in welding equipment, metal processing, welding of curved surface seams, etc., can solve the problems of heavy welding workload and high welding cost, and achieve the effect of low cost, less time consumption and high reliability

Active Publication Date: 2017-06-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0004] In order to overcome the defects existing in the prior art, the present invention provides a method for welding bimetallic mechanical composite pipes, which is used to solve the shortcomings of the existing pipe end metallurgical welding process, such as small deformation of the pipe end, large welding workload and high welding cost, etc. Improve welding efficiency and ensure welding quality

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  • Metallurgy welding method of double-metal mechanical compound pipe ends
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  • Metallurgy welding method of double-metal mechanical compound pipe ends

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Embodiment Construction

[0018] Such as Figure 1 to Figure 3 As shown, the method for metallurgical welding at the end of a bimetallic mechanical composite pipe comprises the following steps:

[0019] Step 1, pipe end seam welding treatment, the treatment process is as follows:

[0020] 101. The matching position of the mechanical composite pipe and the resistance seam welding roller: adjust the positions of the mechanical composite pipe 1 and the two seam welding rollers 2 so that the axes of the three are on the same vertical plane, and the two seam welding roller surfaces are in contact with the end surface of the mechanical composite pipe 1 flush, and the two rollers 2 are located inside and outside the pipe respectively, and tightly clamp the base layer 3 and the inner lining layer 4, see figure 1 ;

[0021] 102. Resistance seam welding at the end of the mechanical composite pipe: perform resistance seam welding on the end of the mechanical composite pipe, so that the base layer 3 and the inne...

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Abstract

The invention discloses a metallurgy welding method of double-metal mechanical compound pipe ends. The method includes the steps of firstly, performing pipe end seam welding; secondly, performing edge preparation; thirdly performing pipeline butt welding. The metallurgy welding method has the advantages the metallurgy combining of the mechanical compound pipe ends by using the seam welding technology, and the welding difficulties of mechanical compound pipes are solved fundamentally; compared with a traditional soldering and sealing process, the metallurgy welding method can prevent weld toe cracks and is good in reliability and high in efficiency; compared with a novel pipe end build up welding process, the metallurgy welding method does not need a complex end processing process, does not consume a large amount of alloy welding materials, and is simple and convenient to operate and low in cost.

Description

technical field [0001] The invention belongs to the field of metal welding of pipeline pressure vessels, and in particular relates to a method for metallurgical welding of the ends of bimetal mechanical composite pipes. Background technique [0002] With the increasing demand for energy from economic development, oil and gas field development and oil and gas storage and transportation have put forward higher requirements for anti-corrosion technology and pipeline materials. It is difficult to take into account the aspects of corrosion resistance, strength and economy for single-component pipes, which leads to the emergence of bimetallic composite pipes. Bimetal composite pipes are divided into metallurgical composite pipes and mechanical composite pipes according to the different bonding methods. Among them, mechanical composite pipes are widely used in today's society because of their simple production, low price and good comprehensive performance. However, the application...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02B23K11/06B23K11/30B23K11/34B23K9/16B23K9/167B23K101/06
CPCB23K9/164B23K9/167B23K11/066B23K11/3036B23K11/34B23K28/02B23K2101/06
Inventor 韩彬韩浩李立英韩国良王勇
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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