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This standard is mainly applicable to the protection of the outer surface of buried steel pipes with polyethylene coating, and specifies the requirements for material properties, manufacturing processes, and quality testing. The outer diameter range of the steel pipes it covers is usually below 15000mm, suitable for special environmental requirements such as water transportation and corrosion prevention.
keyword JIS G3469 Category Anti-coating pipe standards Related products Get a quoteJIS G3469 Polyethylene coated steel pipe
JIS G3469 is a technical specification for polyethylene coated steel pipes in Japanese industrial standards, officially known as "Polyethylene Coated Steel Pipes". This standard is mainly applicable to the protection of the outer surface of buried steel pipes with polyethylene coating, and specifies the requirements for material properties, manufacturing processes, and quality testing. The outer diameter range of the steel pipes it covers is usually below 15000mm, suitable for special environmental requirements such as water transportation and corrosion prevention.
Material and Manufacturing Technology Requirements
The standard specifies that the base steel pipe must comply with basic standards such as JIS G3444 (carbon steel pipe for general structures) and JIS G3452 (carbon steel pipe for general piping systems). Polyethylene coating materials need to meet the technical specifications of adhesives and bonding agents, and the coating thickness needs to be standardized through Supplementary Books B and C. Emphasis is placed on the bonding strength and environmental aging resistance between the coating and the steel pipe during the manufacturing process.
Standard revision and application expansion
JIS G3469 was first released in 2002 and has been revised multiple times. The 2010 version (JIS G3469:2010) replaced the old version, and in 2016, amendment 2 (AMD 2) was released to further optimize the coating process and testing methods. This standard is not only applicable to municipal water supply projects, but also extends to the anti-corrosion pipeline requirements in fields such as chemical engineering and energy.
Association with other steel pipe standards
In the JIS steel pipe standard system, G3469 complements JIS G3454 (carbon steel pipes for pressure pipelines), JIS G3456 (carbon steel pipes for high-temperature pipelines), etc., and is designed for different usage scenarios. For example, G3454 is suitable for pressure pipelines below 350 ℃, while G3469 specializes in the field of anti-corrosion coatings, reflecting the systematic application of Japanese standards in segmented applications.
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