Construction

Schedule 40 Hot-Dip Galvanized Steel Pipe

DETAILS AND PARAMETERS

TOLERANCES

TECHNICAL SHEET

What is a Galvanized Steel Pipe?

A galvanized steel pipe is a carbon steel pipe coated with a protective zinc layer through galvanization, which prevents rust and corrosion, extending the pipe's service life. Two methods are used: Hot-Dip Galvanizing (HDG) for heavy-duty protection and Electro-Galvanizing (Cold Galvanizing) for precise, smooth coatings.

Product Specifications

Our galvanized pipes meet international standards and are customizable for various applications:

Standards: ASTM A53, ASTM A106, BS EN 10219, JIS G3442, DIN 2440.
Sizes:
- Outer Diameter: 1/2" (15mm) to 8" (200mm).
- Wall Thickness: Schedule 40, Schedule 80, and custom options.
Length: Standard 6m (20ft), or customized lengths.
Coating Types: Hot-Dip Galvanizing (HDG) / Electro-Galvanizing (Cold Galvanizing).

Zinc Coating & Applications: Hot-Dip vs. Cold Galvanized

1. Hot-Dip Galvanized Pipes:

Zinc Coating: 60-200 µm (≥610 g/m² zinc mass).
Advantages: Superior corrosion resistance, durable coating, suitable for harsh environments.
Applications:
- Construction scaffolding and structural frameworks.
- Water and gas transmission pipelines.
- Outdoor fencing, highway guardrails, and agricultural equipment.

2. Cold Galvanized Pipes:

Zinc Coating: 5-25 µm (10-50 g/m² zinc mass).
Advantages: Smooth surface, aesthetic finish, cost-effective for mild environments.
Applications:
- Electrical conduits and cable trays.
- Indoor furniture, decorative structures, and automotive parts.
- HVAC systems and light-duty fencing.

Why Choose Us as Your International Partner?

Premium Quality Assurance:
- ISO 9001, CE, and SGS certifications.
- Strict quality control from raw material selection to final inspection.
Global Logistics Expertise:
- Efficient shipping to major ports (e.g., Rotterdam, Houston, Dubai).
- Expertise in customs clearance and documentation.
Competitive Pricing & Support:
- Factory-direct prices with no middlemen.
- 24/7 technical support and customized solutions.
Sustainable Practices:
- Environmentally friendly manufacturing processes.
- Compliance with international environmental standards.
  
  Frequently Asked Questions
  
  Q1: What is the difference between hot-dip and cold galvanizing?
  
  A: Hot-dip galvanizing involves dipping steel in molten zinc (thicker coating, better protection), while cold galvanizing uses electrochemical methods (thinner coating, smoother surface).
  
  Q2: What is the typical delivery time for overseas orders?
  
  A: Standard orders ship within 7-15 days. Express delivery available for urgent projects. We provide real-time shipment tracking.
  
  Q3: Do you provide custom sizes and specifications?
  
  A: Yes! We specialize in custom manufacturing. Send us your requirements for tailored solutions and competitive pricing.

Product Description

Product	A53 Galvanized Pipe
Standard	ASTM A53 / ASME SA53
Material	Carbon Steel
Grades	A53 Grade A, A53 Grade B
Outer Diameter (OD)	1/2” – 48” (21.3mm – 1219mm)
Wall Thickness	SCH10, SCH20, SCH40, SCH80, SCH160, XXS
Length	6m, 12m, or custom lengths
Pipe End	Plain End, Beveled End, Threaded & Coupled
Zinc Coating	40g/m² – 600g/m²
Technique	ERW (Electric Resistance Welded), Seamless, LSAW, SSAW
Surface Treatment	Hot – Dipped Galvanized, Pre – Galvanized, Black Coated
Connection Type	Welding, Threaded, Flanged
Protection	Plastic Caps, Bundled with Steel Strips, Waterproof Wrapping
Certification	ISO, SGS, BV, CE
Stock Availability	10,000+ Tons Per Month

Chemical Composition of ASTM A53

Element	Grade A (%)	Grade B (%)
Carbon (C)	≤ 0.25	≤ 0.30
Manganese (Mn)	≤ 0.95	≤ 1.20
Phosphorus (P)	≤ 0.05	≤ 0.05
Sulfur (S)	≤ 0.045	≤ 0.045
Copper (Cu)	≤ 0.40	≤ 0.40
Nickel (Ni)	≤ 0.40	≤ 0.40
Chromium (Cr)	≤ 0.40	≤ 0.40

Molybdenum (Mo)

≤ 0.15

Mechanical Properties of ASTM A53

Property	Grade A	Grade B
Yield Strength (MPa)	≥ 205 MPa	≥ 240 MPa
Tensile Strength (MPa)	330 – 380 MPa	415 – 550 MPa
Elongation (%)	≥ 20%	≥ 15%
Hardness (Brinell)	≤ 90 HB	≤ 100 HB

Galvanized Coating Options

Coating Type	Zinc Thickness	Application
Pre – Galvanized	40 – 150 g/m²	Indoor & low – corrosion environments
Hot – Dipped Galvanized	200 – 600 g/m²	Heavy – duty industrial & outdoor use