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

Equivalent Grades

Standard	Equivalent Grade
ASTM	A53
EN	S235, S275
JIS	STK400, STK500
GB	Q195, Q235, Q345

Comments (2)

Katherine A. Fogg

November 25, 2024

Their products are of excellent quality and they offer generous discounts. This is their third cooperation