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The standard applies to steel pipes used in water supply systems, requiring the inner and outer walls to be coated with anti-corrosion materials (such as polyethylene or epoxy resin) to avoid secondary pollution during the transportation of water quality, while improving corrosion resistance and service life.
keyword JIS G3443 Category Anti-coating pipe standards Related products Get a quoteJIS G3443 Coated steel pipes for water pipelines
The Japanese Industrial Standard JIS G3443 is a technical specification specifically designed for coated steel pipes used in water pipelines. This standard specifies in detail the materials, manufacturing processes, performance requirements, and testing methods for coated steel pipes. The standard applies to steel pipes used in water supply systems, requiring the inner and outer walls to be coated with anti-corrosion materials (such as polyethylene or epoxy resin) to avoid secondary pollution during the transportation of water quality, while improving corrosion resistance and service life.
Standard technical requirements and application scope
The JIS G3443 standard sets clear requirements for the material of the base pipe, coating adhesion, and pressure resistance performance. For example, the base pipe needs to comply with relevant standards for straight seam welded pipes, spiral welded pipes, or seamless steel pipes, and the coating material needs to pass hygiene performance testing and meet drinking water safety requirements. This standard is mainly applied to urban water supply, drainage systems, and industrial water pipelines, with a particular focus on compressive and corrosion resistance under complex geological conditions.
Association and differences with other national standards
There is a technical reference relationship between Japanese standard G3443 and Chinese coated steel pipe standards such as CJ/T120 and CJ/T136. For example, some content of CJ/T120 draws on the Japanese Waterways Association standard WSP039, while the development of large-diameter coated steel pipes is also influenced by Japanese and American standards. Compared to Chinese standards, JIS G3443 emphasizes more on the bonding strength and long-term weather resistance between coatings and base pipes, especially with stricter stability requirements in high temperature and high pressure environments.
Practical Application and Expansion
With the increasing demand for large-diameter pipelines in urban water supply systems, Japan revised relevant standards in 2000, expanding the application diameter of coated steel pipes to DN1200 and introducing flange connection technology. This type of pipeline is not only used for municipal water supply, but also widely used in special environments such as fire protection and underground coal mines, and needs to meet additional requirements such as flame retardancy and anti-static. China has also referred to the concept of Japanese standards in similar projects, promoting the popularization of coated steel pipes in high-pressure water transportation, chemical anti-corrosion and other fields.
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