DX51D Galvanized pipe

‌Galvanized Seamless Pipe: Lightweight Corrosion-Resistant Solution for High-Stress Applications‌. ‌Engineered for Efficiency: Oil/Gas, Construction & Chemical Processing.‌ Galvanized seamless pipes offer ‌80% weight reduction vs. carbon steel‌ (density: 7.85 g/cm³) while maintaining 400–550 MPa tensile strength. Their ‌Z275 hot-dip galvanized coating‌ provides 2,000+ hours of salt spray resistance (ASTM B117), outperforming welded pipes in acidic/alkaline environments like offshore platforms and chemical reactors.

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Product Introduction

Galvanized Seamless Pipe: Lightweight Corrosion-Resistant Solution for High-Stress Applications‌.

‌Engineered for Efficiency: Oil/Gas, Construction & Chemical Processing.‌

Galvanized seamless pipes offer ‌80% weight reduction vs. carbon steel‌ (density: 7.85 g/cm³) while maintaining 400–550 MPa tensile strength. Their ‌Z275 hot-dip galvanized coating‌ provides 2,000+ hours of salt spray resistance (ASTM B117), outperforming welded pipes in acidic/alkaline environments like offshore platforms and chemical reactors.


‌Certifications & Key Advantages‌

  • ‌ASTM A53 & EN 10255 Certified‌: Compliant with API 5L and ISO 1461 standards.
  • ‌Cost Savings‌: 25% lower installation costs due to 1:5 weight-to-strength ratio vs. square steel.
  • ‌Custom Sizing‌: Thickness 0.1–300 mm (±0.15 mm), OD up to 500 mm.
  • ‌MOQ 5 Tons‌: HDG (hot-dip) or electroplated finishes available.

‌Technical Specifications‌

‌Mechanical Properties‌

Property Value Test Standard
Yield Strength 250–350 MPa ISO 6892-1
Tensile Strength 400–550 MPa ASTM E8/E8M
Elongation (A50) ≥20% EN ISO 6892-2
Zinc Coating 180–275 g/m² (Z275) EN 1461

‌Material Composition‌:

  • ‌Carbon (C)‌: ≤0.25%
  • ‌Manganese (Mn)‌: 0.30–1.40%
  • ‌Silicon (Si)‌: 0.10–0.35%
  • ‌Phosphorus (P)‌: ≤0.035%

‌Coating Details‌:

  • ‌Hot-Dip Galvanizing (HDG)‌: 50–85 µm layer (Z275-Z450).
  • ‌Electroplating (EG)‌: 8–15 µm for indoor/low-corrosion use.
  • ‌Surface Prep‌: ISO 8501-1 Sa2.5 blasting (40–70 µm profile).

‌Dimensional Tolerances‌

Parameter Tolerance
Wall Thickness ±10% of nominal size
Outer Diameter ±1.0% of OD
Straightness ≤1.5 mm/m

‌Applications‌

  1. ‌Oil/Gas‌: Submarine pipelines, refinery heat exchangers.
  2. ‌Construction‌: Earthquake-resistant building frames, roof trusses.
  3. ‌Chemical‌: Sulfuric acid transport lines, fertilizer reactors.
  4. ‌Energy‌: Geothermal steam conduits, nuclear waste containers.

‌Fabrication Guidelines‌

  • ‌Cutting‌: Cold sawing (feed rate ≤0.3 mm/rev for HDG).
  • ‌Welding‌: Use E6013 electrodes (preheat 150–200°C).
  • ‌Bending‌: Minimum radius = 3x pipe diameter.
  • ‌Painting‌: Apply inorganic zinc primer (5 µm) + polyurethane (25 µm).

‌Quality Assurance‌

  • ‌Coating Adhesion‌: ASTM D6677 cross-hatch test (Class 1B).
  • ‌Hydrostatic Test‌: 30 MPa pressure held for 10 sec (API 5L).
  • ‌Certifications‌: PED 2014/68/EU, ASME B36.10M, and ISO 9001:2015.

‌Competitive Edge‌

  • ‌Lifespan‌: 20–35 years in pH 2–12 environments.
  • ‌Lead Time‌: 18–28 days (MOQ 5 tons).
  • ‌Sustainability‌: 100% recyclable with 30% lower carbon footprint vs. PVC.

‌Logistics & Compliance‌

  • ‌Packaging‌: VCI film + wooden crates (ISPM15 certified).
  • ‌Temperature Range‌: -40°C to 450°C (HDG), -10°C to 300°C (EG).
  • ‌Optional Coatings‌: Xylan® or ceramic-polymer hybrid upon request

‌Comparative Analysis‌

Material Tensile Strength (MPa) Corrosion Resistance Key Applications
‌Galv. Seamless‌ 400–550 Extreme (pH 2–12) Refineries, Chemical plants
Carbon Steel ERW 330–460 Moderate Water supply lines
PVC Schedule 80 50 High Drainage systems

‌Request Free Samples or Material Certificates Today!‌
Certifications: API, ASME, ISO. Global logistics network.

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Supplier of various types of carbon steel

Luo Kaiwei Steel Company is a comprehensive steel supplier that produces a variety of carbon steel plates, carbon steel pipes, galvanized steel, carbon steel coils, and steel profiles.

Luo Kaiwei Steel Company is a multi-ISO certified steel manufacturer specializing in carbon steel plates, pipes and galvanized coils since 2010. Competitive prices and ASTM/JIS compliant. Get instant quotes for bulk orders and global shipping support.

Tel: +86 15635685959

E-mail: [email protected]  

WhatsApp: +86 18912200505

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