Hot-Dip Galvanized Steel Pipe
Hot-dip galvanized steel pipes are metal pipes treated through a high-temperature zinc immersion process, offering exceptional corrosion resistance and long service life. They are widely used in construction, municipal projects, and industrial applications. The production process includes acid cleaning (to remove rust), flux treatment, immersion in molten zinc (around 450°C), and cooling. During immersion, the zinc reacts with the steel surface to form a dense zinc-iron alloy layer (50-150 μm thick), effectively isolating the pipe from air and moisture to prevent rust.

Key Advantages:

1. Superior Weather Resistance: Suitable for harsh environments (humidity, acids, or alkalis), with a lifespan of 20-50 years outdoors.

2. High Mechanical Strength: Retains steel’s structural integrity while benefiting from zinc’s protective layer.

3. Cost-Effectiveness: More economical than stainless steel, ideal for large-scale projects.

Applications: Water supply pipelines, fire protection systems, scaffolding, municipal guardrails, and agricultural greenhouse frameworks. Key specifications include wall thickness (e.g., SCH 10, SCH 40), diameter (1/2" to 12"), and compliance with standards like GB/T 3091 or ASTM A53.

Maintenance Tips:

• Avoid mechanical damage to the zinc coating; repair scratches promptly with zinc-rich paint.

• Store in dry, ventilated areas to prevent white rust (zinc oxide).

Hot-dip galvanized steel pipes remain a cornerstone material in corrosion-resistant engineering due to their reliability and economic value.