Galvanized steel pipes are widely used in industrial and construction sectors due to their corrosion resistance and long service life. Pipes with diameters from DN25 to DN200 and a zinc coating thickness of 85μm are particularly valued in harsh environments. This article explains the salt spray test (SST) compliance standards and key application scenarios for these high-performance galvanized pipes.

✅ Zinc Coating Thickness & Salt Spray Test Standards

An 85-micron zinc coating provides robust protection against corrosion, especially in humid, coastal, or chemically aggressive settings. According to international standards such as ISO 9227 and ASTM B117, galvanized pipes with 85μm zinc layers should resist red rust for over 480 hours in a neutral salt spray test (NSS).

Meeting this standard indicates:

• High durability in corrosive environments
• Compliance with export-grade quality standards
• Lower long-term maintenance costs

✅ Size Range: DN25 to DN200

This size range covers common applications in:

• HVAC systems
• Firefighting pipe networks
• Water and gas distribution
• Industrial piping frameworks

From small-diameter control lines to large-diameter main lines, the DN25–DN200 range meets the flexibility and strength demands of modern infrastructure.

✅ Key Applications

Galvanized steel pipes with an 85μm coating are suitable for:

• Coastal construction projects
• Industrial plants with chemical exposure
• Municipal water and sewage systems
• Agricultural irrigation
• Offshore platforms and marine environments

These pipes offer both mechanical strength and enhanced corrosion resistance, making them ideal for environments that require both structural integrity and longevity.

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Conclusion

When selecting galvanized pipes for corrosive environments or international markets, pipes sized DN25 to DN200 with a zinc layer of 85μm ensure compliance with salt spray test standards and deliver excellent long-term performance. For applications demanding durability, safety, and reliability, this specification is a trusted industry choice.