Welded Galvanized Steel Pipe - High-Strength Corrosion-Resistant Tubing for Industrial Applications

Kuaima Steel Co., Ltd.

Verified Custom manufacturer · 7 yrs ·

China

Customizable Rock-bottom price

$720 1-49 ton Base price

$685 50-99 ton 4.9% off

$670 ≥100 ton 6.9% off

Price validity: subject to market conditions

Supplier's customization ability

Drawing-based customization
Sample-based customization
Full customization

Quantity

Minimum order quantity: 1 ton

Shipping total: To be negotiated

Subtotal of goods US$ 720.00

Start order request

Payment and delivery

Payment:: by contract — deposit, balance after your inspection
Lead time:: confirmed with the quotation
Packaging:: standard export packing
Samples:: available on request

Product details

Technical Specifications of Welded Galvanized Steel Pipe

Property	Parameter	Description
Product Name	Welded Galvanized Steel Pipe	ERW carbon steel pipe with hot-dip galvanized coating
Base Material Grade	Q235B / ASTM A53 Grade B / SS400	International grade equivalents
Standard Compliance	ASTM A53, BS 1387, EN 10255, GB/T 3091	Meets major international standards
Manufacturing Process	ERW (Electric Resistance Welded)	High-frequency welded longitudinal seam
Galvanizing Method	Hot-Dip Galvanized (HDG)	Per ASTM A123 / ISO 1461
Zinc Coating Thickness	60 - 100 µm	Equivalent to 275 - 610 g/m²
Carbon (C)	≤0.25%	Carbon content for weldability
Manganese (Mn)	≤1.35%	Improves strength and toughness
Phosphorus (P)	≤0.035%	Controlled for ductility
Sulfur (S)	≤0.035%	Low sulfur for weld quality
Tensile Strength	≥330 MPa	Minimum tensile strength per ASTM A53
Yield Strength	≥205 MPa	Minimum yield strength
Elongation	≥25%	Ductility in 50mm gauge length
OD Range	21.3mm - 219.1mm (1/2'' - 8'')	Available outer diameter options
Wall Thickness	1.0mm - 8.0mm	Standard and custom thickness
Length	5.8m, 6m, 12m or custom	Standard and custom lengths available
Application	Water supply, fencing, scaffolding, structural support	Typical application scenarios
Certification	EN 10204 3.1, ISO 9001, API 5L	Quality certifications provided
Packaging	Bundled with steel strips, plastic caps on ends	Standard export packaging
MOQ	5 tons	Minimum order quantity

Welded Galvanized Steel Pipe - High-Strength Corrosion-Resistant Tubing for Industrial Applications

Welded galvanized steel pipe is a hot-dip zinc-coated carbon steel tube manufactured through ERW (Electric Resistance Welding) or spiral welding processes, delivering superior anti-corrosion performance and robust structural integrity for construction, water conveyance, and general industrial piping systems. With zinc coating thickness ranging from 65 to 100 μm per ASTM A123/A123M, this tubing serves as the preferred choice for projects demanding long service life in humid, outdoor, or mildly corrosive environments. Whether you require standard structural members or custom-length fluid transport lines, our mill-direct galvanized welded pipes offer factory-competitive pricing with full traceability documentation.

What Is Welded Galvanized Steel Pipe?

Welded galvanized steel pipe refers to a carbon steel tube—typically produced from Q235B, ASTM A53 Grade B, or SS400 base material—that undergoes hot-dip galvanizing after the welding seam is formed. The molten zinc bath at approximately 450°C creates a metallurgically bonded coating that shields the steel substrate from oxidation and atmospheric corrosion, extending the pipe's operational lifespan to 20–30 years in moderate conditions.

Welded Galvanized Steel Pipe Technical Specifications

Our galvanized welded tubing is manufactured in compliance with ASTM A53/A53M-22, BS 1387:1985, and EN 10255:2004. The following table outlines key parameters:

Welded galvanized steel pipe supplier

Parameter	Range / Value
Outside Diameter	21.3 mm – 508 mm (½″ – 20″)
Wall Thickness	1.0 mm – 16 mm
Length	5.8 m, 6 m, 12 m, or custom cut
Zinc Coating Weight	≥ 300 g/m² (ASTM A53 Class B)
Yield Strength (A53 Gr. B)	≥ 240 MPa
Tensile Strength (A53 Gr. B)	≥ 415 MPa
Hydrostatic Test Pressure	Per ASTM A53 Section 10

Key Applications of Galvanized Welded Tubing

Water supply and drainage systems – zinc-coated interior resists scale buildup and mild chemical attack
Structural scaffolding and greenhouse frames – exceptional mechanical strength with outdoor weather resistance
Fence posts and handrails – maintenance-free surface finish in exposed installations
Fire sprinkler piping – complies with NFPA 13 requirements for galvanized piping systems
HVAC ductwork supports – lightweight yet rigid members for mechanical system framing

Why Choose Our Galvanized Welded Steel Pipe

Every batch of welded galvanized steel pipe ships with EN 10204 Type 3.1 Mill Test Certificates covering chemical composition, mechanical properties, and zinc coating thickness. Our production line features inline ultrasonic weld seam inspection per ASTM E273, and all tubes pass the flattening test specified in ASTM A53 Section 9. With ISO 9001:2015-certified quality management and annual output exceeding 200,000 metric tons, we maintain consistent supply for large-scale infrastructure and OEM procurement programs.

Welded galvanized steel pipe wholesale

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Standard sizes start at 5 metric tons per specification. For non-standard OD or wall thickness combinations, the typical MOQ is 10 metric tons to arrange a dedicated rolling schedule.

Welded galvanized steel pipe China

Do you provide material test certificates?

Yes. Each shipment includes an EN 10204 Type 3.1 MTC detailing chemical analysis, tensile and yield values, zinc coating weight, and hydrostatic test results traceable to the specific heat number.

What is the typical delivery time?

Stock items in common diameters (1″–4″) ship within 7–10 business days. Custom orders or large-volume contracts generally require 20–30 days from order confirmation to ex-works readiness.

Can you cut to custom sizes?

Absolutely. We offer precision cutting from 0.5 m to 12 m with a tolerance of ±3 mm, along with optional bevel ends, threading per ANSI/ASME B1.20.1, or groove preparation for mechanical couplings.

Get a Competitive Quote for Welded Galvanized Steel Pipe

Looking for value-driven pricing on galvanized welded tubing delivered to your project site or port? Share your required specifications—OD, wall thickness, length, zinc coating grade, and annual volume—and our technical sales team will respond within 12 hours with a detailed quotation, including available shipping terms (FOB, CFR, CIF) and packaging options tailored to your logistics requirements.

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Robert Brown

United Kingdom

2025-02-28

Acceptable Galvanized Pipe Quality, Coating Variance Flagged and Resolved

Ordered 10 tons of galvanized welded pipe, 4-inch OD, 3.6mm wall, 6m lengths for a drainage support structure project in Leeds. Most of the batch performed well and the 3.1 MTCs were complete. However, our inspector found that roughly 15 pipes in one bundle showed zinc coating readings between 58–63μm, slightly below the 65μm lower bound specified. We raised this with the supplier immediately—they reviewed the inspection records, acknowledged the variance in that specific bundle, and arranged a partial replacement shipment within 11 days at no additional freight cost. The replacement pipes measured consistently above 80μm. Resolution was handled professionally. We would consider ordering again but will request bundle-level coating inspection records upfront next time.

Wei Chen

Singapore

2025-03-21

Excellent Fire Sprinkler Galvanized Pipe, NFPA 13 Compliant

Sourced 16 tons of galvanized welded steel pipe for fire sprinkler system installation across a logistics warehouse complex in Singapore. Specified 1-inch and 1.5-inch NPS, Schedule 40, with groove preparation for mechanical couplings. The supplier confirmed NFPA 13 compliance in writing and provided hydrostatic test pressure records per ASTM A53 Section 10 for every heat. Groove dimensions were checked against Victaulic coupling specs and fit was correct throughout. Mill test certificates were issued as EN 10204 Type 3.1 with full chemical composition trace. Response time on our technical queries averaged under 6 hours across three rounds of clarification. Shipment reached Singapore port in 19 days on a CIF basis. Recommending to our regional project partners.

Carlos Silva

Brazil

2025-04-13

Reliable Galvanized Tubing for Industrial Fence Post Program

Purchased 22 tons of galvanized welded pipe, 60.3mm and 76.1mm OD, 2.5mm wall, 2.5m custom lengths for a perimeter fencing program at an industrial facility in Recife. Mechanical properties on the MTC matched ASTM A53 Grade B requirements closely—tensile at 421 MPa. Flattening test results were documented and passed without cracking. Custom cut lengths were accurate to ±2.5mm. The only minor note is that lead time stretched to 26 days against the 20-day estimate due to port congestion at origin, though the supplier kept us updated throughout. Pricing was 9% below the two other Chinese mills we quoted. Would use again for upcoming expansion phases.