21mm Galvanized Water Pipe

A 21 mm galvanized pipe is a medium weight, standard galvanized tube with an outside diameter of 21 mm. It can be used for a variety of purposes, including: Handrails, Furniture projects, Threading, Lightweight frames Galvanized pipes are steel pipes that have been dipped in a protective zinc coating to prevent corrosion and rust. Galvanized piping was commonly installed in homes built before 1960. When it was invented, galvanized pipe was an alternative to lead pipe for water supply lines. Today, however, we have learned that decades of exposure to water will cause galvanized pipes to corrode and rust on the inside.

A 21mm galvanized pipe the most significant problem related to galvanized pipes is the mineral deposits that accumulate within the piping. Over time, it causes a reduction in water pressure and pollutes your home's water. And as rust and corrosion deepen, they compromise the piping system's stability and cause leaks. As old and corroded galvanized pipes age, they can release accumulated lead into your tap water. That lead can pose significant health concerns, as ingesting too much can result in lead poisoning, and its symptoms include fatigue, headaches, insomnia, nausea, constipation, abdominal pain, and reduced cognitive abilities. High doses of lead are of particular concern with children, as it can hinder their brain development and lead to lifelong health issues.

1. Superior Corrosion Resistance

Hot-dip galvanized coating (≥320g/m²) provides electrochemical protection, effectively resisting corrosion from water, soil, and atmospheric exposure. Service life is 3-5 times longer than ordinary steel pipes.

2. High Strength & Durability

Made from high-quality low-carbon steel with compressive strength exceeding 300MPa, suitable for high-pressure water supply systems. Resists deformation and bursting.

3. Lightweight & Easy Installation

The 21mm small-diameter design is lightweight (~1.2kg/m), supporting threaded or clamp connections for quick installation, reducing labor costs by over 30%.

4. Versatile Applications

Ideal for:
✓ Household hot/cold water piping systems
✓ Agricultural drip/sprinkler irrigation networks
✓ Firefighting branch lines & compressed air pipelines

5. Hygienic & Safe

The zinc layer forms a dense protective barrier, preventing iron ion leaching. Complies with GB/T 3091-2015 drinking water pipeline standards.

6. Cost-Effective

Maintenance-free design reduces long-term costs. 40-50% more affordable than stainless steel pipes with excellent cost-performance ratio.

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