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

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...

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 resistance. A large section, and plastic pipes have disadvantages such as easy aging and high cost of using large-diameter pipes

However, for some industrial enterprises, such as pure stainless steel pipelines for transporting chemical media in the chemical industry, the investment cost is too large, forming a burden on enterprises.