Rust-Proof galvanized pipe | Hot-Dip Coated Water Systems

Rust-Proof Galvanized Pipe | Hot-Dip Coated Water Systems

Product Overview

Our hot-dip galvanized pipes are engineered to deliver unmatched durability and corrosion resistance for water supply systems, structural frameworks, and industrial applications. Utilizing advanced hot-dip galvanization technology, these pipes are coated with a thick zinc layer (≥130 g/m² ), ensuring long-term protection against rust and environmental degradation. Ideal for galvanized fence pipe installations, municipal water networks, and heavy-duty construction, our products comply with international standards like ASTM A53, EN 10255, and ISO 1461.

Technical Specifications

Key Properties

1. Corrosion Resistance
   The zinc coating forms a sacrificial barrier, preventing oxidation even in humid or saline environments (e.g., coastal areas). Inner linings like cement mortar (≥3mm) or epoxy (≥250μm) enhance longevity in water systems.

    

2. Mechanical Strength

   • Tensile Strength: ≥500 MPa (ISO 6892-1) 
   • Yield Strength: ≥300 MPa 
   • Elongation: ≥7% (50mm gauge length) 
   • Bend Resistance: Withstands 90° bends without cracking (tested per EN 10242) .

3. Versatility
   Suitable for galvanized fence pipe, fire sprinklers, HVAC, and potable water systems. Compatible with threaded, welded, or grooved connections.

    

Weight Calculation

The weight of galvanized pipes can be calculated using:
Weight (kg)=4π×(OD2−(OD−2×WT)2)×L×7.85×0.001
Where:

• $OD$ = Outer Diameter (mm)
• $WT$ = Wall Thickness (mm)
• $L$ = Length (m)
  Example: A DN100 pipe (OD=114mm, WT=4mm, 6m length) weighs ≈21.5 kg .

Why Stainless Steel Rusts?

While stainless steel is corrosion-resistant, rust can occur due to:

1. Damaged Oxide Layer: Scratches or chemical exposure disrupt the chromium oxide film, allowing oxygen and moisture to react with iron .
2. Chloride Attack: Saltwater or de-icing agents penetrate the surface, causing pitting corrosion .
3. Galvanic Corrosion: Contact with dissimilar metals (e.g., carbon steel) triggers electrochemical degradation .
4. High-Temperature Oxidation: Prolonged exposure to >400°C weakens the protective layer .

Do Galvanized Pipes Contain Lead?

Most galvanized pipes are lead-free, as the hot-dip process uses pure zinc. However, older pipes or low-quality coatings may contain trace impurities (<0.1% per ISO 8179-1) . Our products are certified NSF 61 and RoHS-compliant, ensuring safe use in drinking water systems .

Applications

• Water Supply: Centralized hot/cold water distribution with minimal scaling .
• Fencing: Galvanized fence pipe for agricultural, industrial, and residential security .
• HVAC & Fire Protection: Pre-galvanized ducts and sprinkler systems with UL/FM approval .
• Structural Support: High-strength frameworks for bridges and buildings .

Certifications & Compliance

• ISO 1461 (Hot-Dip Galvanizing)
• ASTM A53/A500 (Structural Integrity)
• NSF 61 (Potable Water Safety)
• UL Listed / FM Approved (Fire Safety) 

Why Choose Our Stainless Steel?

1. Superior Material Quality: Grade 304/316L stainless steel with ≥90% nodularity and anti-UV coatings .
2. Custom Solutions: Tailored dimensions (e.g., galvanized pipe near me quick delivery) and surface finishes (electropolished, brushed) .
3. Eco-Friendly: 100% recyclable and manufactured with low-carbon processes .
4. Lifetime Warranty: Backed by third-party inspections (SGS/BV) and 24/7 technical support.