Construction

Factory-Direct Galvanized Steel Pipes ASTM Certified Competitive Pricing

DETAILS AND PARAMETERS

TOLERANCES

TECHNICAL SHEET

What Are Galvanized Steel Pipes?

Galvanized steel pipes are carbon steel pipes coated with a protective zinc layer through galvanization, providing superior corrosion resistance and extended service life of 50+ years. Ideal for construction, plumbing, and industrial applications.

Product Grades & Standards

International Standards: ASTM A53 Gr.B, API 5L, BS 1387, EN 10219
Certifications: ISO 9001, CE, SGS, BIS
Size Range: 1/2" to 8" OD, SCH 40 to SCH 160
Surface Options: Hot-Dip Galvanized / Electro-Galvanized

Hot-Dip vs. Cold Galvanized: Key Differences

Hot-Dip Galvanized Pipes:

Process: Immersion in molten zinc (455°C)
Coating Thickness: 85-200μm
Coating Adhesion: Metallurgical bond
Service Life: 50+ years
Best For: Outdoor structures, water systems, marine environments

Cold Galvanized Pipes:

Process: Electrolytic deposition
Coating Thickness: 5-25μm
Coating Adhesion: Mechanical bond
Service Life: 10-15 years
Best For: Indoor applications, electrical conduits, decorative uses

Your Benefits with Us:
18 Years Expertise | Certified Quality | Timely Delivery
Best Value | Technical Support | Global Reach

What Customers Gain By Choosing Us

Long-Term Cost Savings: Superior products reduce replacement costs
Project Reliability: Consistent quality ensures project timelines
Technical Expertise: 18 years of problem-solving experience
Global Compliance: Hassle-free international shipments
Peace of Mind: Certified quality with full traceability

Frequently Asked Questions

Q1: How does your quality control ensure coating consistency?
A: We implement triple-stage inspection: pre-treatment checks, immersion monitoring, and post-galvanizing verification to ensure uniform coating thickness.

Q2: What is your maximum production capacity?
A: We can produce 5,000+ tons monthly with consistent quality, supported by automated production lines.

Q3: Do you provide technical support for project specifications?
A: Yes! Our engineering team offers free technical consultation and can help select the optimal pipe specification for your project.

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