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Production method of composite bimetal pipe

A composite bimetal and production method technology, applied in the production field of composite bimetal pipe, can solve the problems of non-metallurgical combination of inner and outer pipes, complex production process, expensive production equipment, etc., and achieve the effect of reducing cost and simple production process

Inactive Publication Date: 2005-10-26
大连合生科技开发有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of expensive production equipment, complicated production process and non-metallurgical combination between inner and outer pipes in the prior art, and provide a production method of composite bimetallic pipe with simple process and no need for complicated equipment

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  • Production method of composite bimetal pipe
  • Production method of composite bimetal pipe
  • Production method of composite bimetal pipe

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Embodiment Construction

[0017] The specific implementation manner of the present invention will be described below with reference to the accompanying drawings.

[0018] According to the mechanical performance requirements of the composite bimetallic pipe, carbon structural steel pipes with different carbon contents are selected as the outer pipe 1 . The outer tube of this embodiment is a 10 steel round tube with an outer diameter of 25 mm and a wall thickness of 2.5 mm. According to the requirements of corrosion resistance, different corrosion-resistant metal pipes are selected as the inner pipe 2 . The inner tube of this embodiment is a T2 round copper tube with an outer diameter of 19 mm and a wall thickness of 0.5 mm. The inner diameter of the carbon steel round pipe is slightly larger than the outer diameter of the copper pipe, which makes it easy to insert the copper pipe into the steel pipe.

[0019] The production technology of the embodiment of the present invention is as figure 1 , 2 Sho...

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Abstract

A production method of composite bimetal pipe includes the following steps: making surface treatment of internal pipe and external pipe: inserting internal pipe into external pipe, tight fitting to form composite pipe blank; seating the two ends of the said pipe blank with air and liquid in the internal pipe, and sealing the gap between the internal pipe and the external pipe, heating and diffusion annealing so as to obtain the invented product. Its production process is simple, and is applicable to various anticorrosion pipes.

Description

Technical field: [0001] The invention relates to a production method of a composite bimetallic pipe, in particular to a production method of a composite bimetallic pipe with a carbon steel round pipe as an outer pipe and a thin-walled corrosion-resistant metal pipe as an inner pipe. Background technique: [0002] As we all know, logistics pipelines must have both high strength and corrosion resistance. In order to ensure strength, metal pipes with thicker walls must be used, and in order to ensure corrosion resistance, precious metal materials such as copper, copper alloys, and stainless steel must be used. Therefore, in order to meet the dual requirements of high strength and corrosion resistance, a large amount of precious metal resources such as copper, chromium, and nickel must be consumed, and the product is expensive. [0003] In order to solve the problem of waste of precious metals, people have developed composite bimetallic pipes (also known as inner composite meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C1/00B21C9/00
Inventor 刘世程刘德义陈汝淑戴雅康
Owner 大连合生科技开发有限公司
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