Process for producing composite zinc-coated steel pipe with inner stainless steel lining

A galvanized steel pipe and production process technology, applied in the direction of pipes/pipe joints/fittings, pipes, rigid pipes, etc., can solve the problems of high investment cost, easy aging of plastic pipes, high cost of use of large-diameter pipes, etc., and achieve simple production process , low cost, high production output

Inactive Publication Date: 2003-04-09
郑阿松
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limited to the national conditions of our country, pure stainless steel pipes or copper pipes cannot be widely used like developed countries. Although the application of plastic water supply pipes can greatly improve water quality, they are inferior to metal in terms of strength, external load-bearing capacity and impact resis

Method used

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Examples

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Example Embodiment

[0013] (Unit: mm)

[0014] Select galvanized steel pipes and stainless steel pipes, and firstly polish the inner wall of the galvanized steel pipes, flatten them, and trim them until the inner surface is smooth and free of impurities. The outer surface of the stainless steel pipe is uniformly coated with adhesive, which is a special amide hot-melt adhesive, and then is sleeved into the galvanized steel pipe, crimped and closed at both ends. The stainless steel pipe is heated and pressurized by steam, and the galvanized steel pipe is heated by electric heating. The heating temperature inside and outside is 100-110℃, and the pressure inside the stainless steel pipe is 1.6-2.0MPa. Keep it for a certain period of time until the outer and inner walls of the galvanized steel pipe and the outer wall of the stainless steel pipe are firmly compounded by the adhesive and then cooled, relieved, and finished.

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Abstract

The production process of composite zinc-coated steel pipe with stainless steel lining belongs to the field of metal processing technology. The production process includes trimming inside wall of thezinc-coated steel pipe, painting adhesive to outer wall of the stainless steel pipe, inserting the stainless steel pipe into the zinc-coated steel pipe, hemming and sealing two ends, leading steam into the stainless steel pipe to heat and pressurize, heating the zinc-coated steel pipe from outside electrically to combine two layers of steel pipe firmly. The composite pipe may be used in city water supply to raise water quality and used to replace stainless steel pipe or copper pipe as industrial conveyance pipe.

Description

【Technical field】 [0001] The invention belongs to the technical field of metal processing. 【Background technique】 [0002] At present, ordinary die-cast iron pipes and cement steel pipes are mostly used in my country's urban water supply pipe network. Due to the material itself and long-term use, water pollution is serious. According to statistics, what nearly 60% of urban residents in my country eat is yellow, turbid tap water. With the continuous improvement of living standards, people's requirements for water quality are getting higher and higher. Limited to the national conditions of our country, pure stainless steel pipes or copper pipes cannot be widely used like developed countries. Although the application of plastic water supply pipes can greatly improve water quality, they are inferior to metal in terms of strength, external load-bearing capacity and impact resistance. A large section, and plastic pipes have disadvantages such as easy aging and high cost of using...

Claims

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Application Information

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IPC IPC(8): B32B1/08F16L9/02
Inventor 郑阿松
Owner 郑阿松
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