Hot Dipped Galvanized Steel Pipe - Corrosion Resistant Structural Tubing

Kuaima Steel Co., Ltd.

Verified Custom manufacturer · 7 yrs ·

China

Customizable Rock-bottom price

$720 1-49 ton Base price

$688 50-99 ton 4.4% off

$673 ≥100 ton 6.5% 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 Hot Dipped Galvanized Steel Pipe

Property	Parameter	Description
Product Name	Hot Dipped Galvanized Steel Pipe	Carbon steel pipe with zinc coating by hot dip process
Base Material	Q235B / ASTM A53 / SS400	Common carbon steel substrate grades
Standard Compliance	ASTM A53, BS 1387, EN 10240, GB/T 3091	Meets major international standards
Manufacturing Process	ERW / Seamless + Hot Dip Galvanizing	Welded or seamless pipe with zinc immersion coating
Zinc Coating Thickness	65 - 610 g/m²	Per ASTM A123 / ISO 1461 requirements
Carbon (C)	≤0.25%	Carbon content for weldability
Manganese (Mn)	≤1.40%	Improves strength and hardness
Phosphorus (P)	≤0.045%	Controlled for ductility
Sulfur (S)	≤0.045%	Low sulfur for improved weldability
Tensile Strength	≥330 MPa	Minimum tensile strength per ASTM A53 Grade B
Yield Strength	≥205 MPa	Minimum yield strength
Elongation	≥23%	Ductility in 50mm gauge length
OD Range	21.3mm - 508mm (1/2'' - 20'')	Available outer diameter options
Wall Thickness	1.0mm - 16mm	Standard and custom thickness available
Length	5.8m, 6m, 12m or custom	Standard and custom cut lengths
Surface Finish	Hot dipped galvanized, smooth zinc coating	Uniform bright silver appearance
Application	Water supply, scaffolding, fencing, structural, greenhouse	Typical application industries
Certification	EN 10204 3.1, ISO 9001, SGS, BV	Quality certifications provided
Packaging	Bundled with steel strips, plastic caps on ends	Standard seaworthy export packaging
MOQ	5 tons	Minimum order quantity

Hot Dipped Galvanized Steel Pipe - Corrosion Resistant Structural Tubing

Hot dipped galvanized steel pipe is a carbon steel tube coated with a protective zinc layer through immersion in molten zinc at approximately 450°C (842°F), forming a metallurgically bonded barrier against rust and environmental degradation. This process, governed by ASTM A123/A123M-17, produces a coating thickness typically ranging from 65 to 100 µm, making it the preferred choice for outdoor structural frameworks, water distribution networks, and industrial fencing systems. Whether you require large-diameter pilings for civil engineering or standard Schedule 40 conduits for commercial plumbing, our mill-direct supply ensures consistent zinc adhesion and dimensional accuracy for every shipment.

What Is Hot Dipped Galvanized Steel Pipe?

Hot dipped galvanized steel pipe refers to a welded or seamless carbon steel tube that has been fully submerged in a bath of molten zinc (minimum 98% Zn per ASTM B6). The immersion triggers an iron-zinc alloying reaction, creating multiple intermetallic layers—gamma, delta, zeta, and a pure eta zinc surface—that deliver both sacrificial and barrier corrosion protection. Unlike electro-galvanized alternatives, the hot dip method yields a substantially thicker, self-healing coating suited to harsh exterior environments.

Hot dipped galvanized steel pipe supplier

Hot Dipped Galvanized Steel Pipe Technical Specifications

Our galvanized steel tubing is manufactured according to ASTM A53/A53M-22 Grade B and BS EN 10255, with the following key parameters:

Property	Value / Range
Base Material	Q235B / ASTM A53 Gr. B carbon steel
Yield Strength (min.)	240 MPa
Tensile Strength (min.)	415 MPa
Zinc Coating Weight	300–600 g/m² per ASTM A123
Outside Diameter	21.3 mm – 508 mm (½″ – 20″)
Wall Thickness	1.8 mm – 16 mm (SCH 20 – SCH 80)
Length	5.8 m, 6 m, or 12 m standard; custom cut available
End Finish	Plain, beveled, or threaded with coupling

Key Applications of Galvanized Steel Tubing

Structural & scaffolding: Building frames, greenhouse skeletons, highway guardrails
Water & fluid transport: Municipal water supply, fire sprinkler lines, irrigation systems
Fencing & barriers: Chain-link fence posts, livestock corrals, perimeter security
Mechanical & general engineering: Conveyor supports, handrails, cable conduits

Why Choose Our Hot Dipped Galvanized Steel Pipe

Each batch undergoes a uniformity test per ASTM A90/A90M to verify zinc coating mass, along with hydrostatic testing at 5 MPa for welded grades. We hold ISO 9001:2015 certification and supply full Mill Test Certificates (EN 10204 Type 3.1) with every order. Our in-house threading and grooving lines enable rapid turnaround on finished piping assemblies, reducing your on-site labor costs.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

The standard MOQ is 5 metric tons per size. For project-based procurement involving mixed dimensions, we accept combined orders starting from 10 tons total.

Do you provide material test certificates?

Yes. Every shipment includes an EN 10204 Type 3.1 Mill Test Certificate covering chemical composition, mechanical properties, zinc coating weight, and hydrostatic test results.

What is the typical delivery time?

Stock sizes ship within 7–10 business days. Custom outside diameters or non-standard lengths require 20–30 days from order confirmation, depending on production scheduling.

Can you cut to custom sizes?

Absolutely. We offer precision saw-cutting, threading (NPT/BSP), grooving, and beveling services. Tolerances conform to ASTM A53 Section 11 for length and end-squareness.

Hot dipped galvanized steel pipe wholesale

Get a Competitive Quote for Hot Dipped Galvanized Steel Pipe

Looking for factory-competitive pricing on galvanized structural tubing? Share your required specifications—OD, wall thickness, length, coating grade, and quantity—and our technical sales team will deliver a detailed quotation within 24 hours. Contact us today to discuss volume discounts and flexible shipping terms for your next project.

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Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Wei Chen

Singapore

2025-08-31

Acceptable Galvanized Pipe Quality, Coating Variation Issue Resolved

Ordered 15 tons of hot dipped galvanized steel pipe, 76.1mm OD, 4mm wall, 6m lengths, for resale to a construction client in Indonesia. Coating weight on most pipes met the ASTM A123 specification at 300–350 g/m², but approximately 8% of pipes in one bundle tested below 290 g/m² on our incoming inspection. We raised this with the supplier immediately—they provided a re-inspection report within 48 hours and issued replacement pipes for the affected quantity at no additional freight cost for the shortfall. The resolution process was handled professionally and the replacement batch tested at 380 g/m². Delivery on the original order was 12 days. MTCs were complete and accurate. The coating inconsistency in one bundle is the reason for 3 stars; the after-sales handling was genuinely responsive. Will consider re-ordering if quality control on coating uniformity improves.

Chris Martin

Canada

2025-09-07

Reliable Galvanized Tubing for Scaffolding Rental Fleet Expansion

Sourced 30 tons of hot dipped galvanized steel pipe, 48.3mm OD, 3.2mm wall, 6m plain ends, for expanding our scaffolding rental inventory across Alberta job sites. Zinc coating weight averaged 395 g/m², which is adequate for Canadian outdoor exposure conditions. EN 10204 3.1 certificates were provided promptly and covered all required parameters. Dimensional accuracy was consistent—our QC team spot-checked 50 random pipes and all were within ASTM A53 tolerance. Lead time was 10 business days for stock sizes, which worked for our schedule. The only reason for 4 stars rather than 5 is that the quotation response took closer to 36 hours rather than the stated 24 hours, though the technical detail in the quote itself was thorough. Would order again for future fleet additions.

Carlos Silva

Brazil

2025-09-28

Good Value Galvanized Pipe for Irrigation Network, Minor Packaging Issue

Purchased 20 tons of hot dipped galvanized steel pipe, 2-inch (60.3mm) OD, Schedule 40, 6m threaded with coupling, for an agricultural irrigation system in Mato Grosso do Sul. Zinc coating weight was 360 g/m² per ASTM A123—acceptable for the inland application. Chemical composition on the MTC confirmed Q235B base material. Pricing was competitive; we got quotes from five suppliers and this was the second-lowest with the best documentation package. Delivery took 14 business days, slightly longer than the 7–10 day estimate, though the sales team communicated the delay proactively. Minor issue: three bundles had damaged outer wrapping on arrival, though the pipes themselves were unaffected. Supplier offered partial credit for the packaging concern, which was handled professionally. Overall good value and we are evaluating a follow-up order for Phase 2.