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ERW-Tech galvanized pipe fittings | Electric Resistance Welding

ERW-Tech galvanized pipe fittings | Electric Resistance Welding

$420.00 SGD
$420.00 SGD
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ERW-Tech Galvanized Pipe Fittings | Electric Resistance Welding

Product Specifications

Parameter Details
Zinc Coating 275–350g/m² (Z275–Z350), hot-dip galvanized per ISO 1461 and ASTM A53, ensuring resistance to galvanized steel pipe corrosion in harsh environments
Diameter Range 1/2" to 18" (15–457mm) – seamless compatibility with galvanized pipe coupling systems
Wall Thickness 2.0–25.4mm, ideal for structural, HVAC, and galvanized gas pipe applications
Standards ASTM A53, EN 10255, ISO 9001, BS 1387, API 5L
Surface Finish Zero spangle, Cr6+-free chromated layer, hot-dip galvanized with ≥85µm coating
Hardness 150–250 HB (Brinell hardness), tested via Rockwell C scale for mechanical stress tolerance
Thread Compatibility NPT, BSPT, DIN 2999 for global adaptability
Temperature Tolerance -40°C to 400°C, engineered for extreme industrial and outdoor conditions

Technical Properties

Tensile & Bend Strength

  • Tensile Strength: Ranges from 350–550 MPa (ISO 1461), exceeding ASTM A53 Grade B requirements for high-pressure fluid transport. Validated through Charpy V-notch impact tests at -20°C.
  • Bend Strength: Achieves 3T bend radius (3x pipe diameter) without cracking, validated through cold-forming tests for structural frameworks and galvanized gas pipe systems.

Weight Calculation

Weight (kg/m) = (OD – WT) × WT × 0.02466
Example: For a 6" OD pipe with 8mm wall thickness:
(168.3 – 8) × 8 × 0.02466 = 31.6 kg/m. Custom calculators provided for bulk orders.

Identification Marking

  • Laser-etched labels include:
    • Grade (e.g., ASTM A106, S275JR).
    • Zinc coating thickness (Z275–Z350).
    • Compliance marks (ISO 9001, EN 10255).

Why Stainless Steel Corrodes?

While ERW-Tech galvanized fittings resist rust via sacrificial zinc protection, stainless steel may corrode due to:

  1. Chloride Exposure: Coastal environments or de-icing salts induce pitting in 304/316 grades.
  2. Mechanical Damage: Scratches or improper welding expose the base metal to oxidation.
  3. Galvanic Corrosion: Contact with dissimilar metals (e.g., copper) accelerates degradation.
  4. High-Temperature Stress: Prolonged exposure to >400°C destabilizes passive oxide layers.

Manufacturing Process

Stage Description
Material Prep Low-carbon steel (Q235B) pickled to remove oxides, ensuring optimal zinc adhesion.
ERW Welding High-frequency induction welding (HFIW) at 1000 kW, ensuring seamless joints for galvanized pipe coupling systems.
Galvanizing Dipped in molten zinc (445–460°C), forming Fe-Zn alloy layers (≥85µm coating).
QC Inspection Salt-spray tests (1,500+ hours), 3D thickness scans, and hydrostatic pressure checks (≥25 MPa).

Applications & Durability

  • Gas & Water Supply: Ideal for galvanized gas pipe networks in residential and industrial settings, resisting galvanized steel pipe corrosion for 50+ years.
  • Fire Protection Systems: Compliant with NFPA 13 for sprinkler installations, validated under variable water quality conditions.
  • Infrastructure: Used in culverts, retaining walls, and flood management with galvanized pipe coupling solutions.

Keywords Integration:

  • Explore our galvanized pipe coupling range for leak-proof connections in HVAC systems.
  • Trusted for galvanized gas pipe networks in compliance with ASTM B36.10M standards.
  • Advanced zinc coatings combat galvanized steel pipe corrosion in coastal and chemical environments.

Why Choose Our Stainless Steel Solutions?

Positioned at the end as requested:

  1. Superior Hygiene: 316L grades meet NSF/EN 10312 standards for food and pharmaceutical industries.
  2. Decades of Expertise: ISO 9001-certified production with 30+ years in steel fabrication.
  3. Sustainability: 95% recyclable materials align with EU Green Deal and circular economy principles.
  4. Custom Fabrication: CAD-driven designs for precision components in aerospace and chemical sectors.
  5. Global Compliance: ASTM, EN, and JIS certifications ensure seamless project integration.
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