Zinc Coated Steel Pipe - Corrosion Resistant Galvanized Steel Tubing for Industrial Use

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

Technical Specifications of Zinc Coated Steel Pipe

Property	Parameter	Description
Product Name	Zinc Coated Steel Pipe	Hot-dip galvanized carbon steel pipe
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 / Seamless + Hot-Dip Galvanizing	Welded or seamless with zinc coating
Carbon (C)	≤0.25%	Carbon content for formability
Manganese (Mn)	≤1.35%	Improves strength and hardness
Phosphorus (P)	≤0.035%	Controlled for ductility
Sulfur (S)	≤0.035%	Low sulfur for weldability
Zinc Coating Thickness	60 - 550 g/m²	Per ASTM A123 / ISO 1461 standards
Tensile Strength	≥330 MPa	Minimum tensile strength per ASTM A53
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
Length	5.8m, 6m, 12m or custom	Standard and custom lengths available
Surface Finish	Hot-Dip Galvanized / Pre-Galvanized	Bright zinc coating with smooth finish
Application	Water supply, fencing, scaffolding, construction	Typical application industries
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

Zinc Coated Steel Pipe - Corrosion Resistant Galvanized Steel Tubing for Industrial Use

Zinc coated steel pipe delivers outstanding anti-corrosion properties by applying a protective zinc layer to carbon steel substrates, making it the preferred choice for water distribution, structural frameworks, and outdoor construction projects. Whether you need hot-dip galvanized tubing for municipal infrastructure or pre-galvanized pipe for mechanical applications, this product offers exceptional durability against corrosive environments while maintaining cost-effective performance. Our mill-direct supply ensures consistent zinc coating quality and prompt delivery for contractors, distributors, and project engineers worldwide.

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What Is Zinc Coated Steel Pipe?

Zinc coated steel pipe is a carbon steel tube that has been treated with a zinc protective layer through hot-dip galvanizing or electro-galvanizing processes. The zinc barrier acts as a sacrificial anode, preventing the underlying steel from oxidizing even when the surface coating is scratched or damaged. This galvanized steel tubing is manufactured according to ASTM A53/A53M-22 and EN 10240:2016, ensuring reliable performance across demanding service conditions.

Zinc Coated Steel Pipe Technical Specifications

Our galvanized pipe inventory covers a comprehensive range of dimensions and coating weights to match diverse project requirements:

Parameter	Specification
Outside Diameter	1/2" to 12" (DN15–DN300)
Wall Thickness	SCH 10 to SCH 80
Zinc Coating Weight	300–600 g/m² per ASTM A123/A123M
Base Material	Q235B, Q345B, ASTM A53 Grade B (yield strength ≥ 240 MPa)
Tensile Strength	≥ 415 MPa (ASTM A53 Gr.B)
Standards	ASTM A53, BS 1387, EN 10255, JIS G3444
Length	5.8m, 6m, or custom cut-to-length
End Finish	Plain, beveled, threaded and coupled

Key Applications of Galvanized Steel Tubing

Water supply and plumbing systems – Potable water lines, fire sprinkler networks, and irrigation pipelines
Structural and fencing – Greenhouse frames, guardrails, scaffolding, and chain-link fence posts
Oil and gas transmission – Low-pressure gas distribution and oilfield gathering lines
HVAC and mechanical – Conduit piping, ventilation supports, and equipment framing

Why Choose Our Zinc Coated Steel Pipe

With over 15 years of export experience, we supply galvanized steel tubing to more than 50 countries. Every batch undergoes zinc coating adhesion testing per ASTM A90, hydrostatic testing to 2.5 MPa, and full dimensional inspection. We hold ISO 9001:2015 certification and provide EN 10204 Type 3.1 mill test certificates with each shipment, giving buyers complete traceability from raw material to finished product.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ is 5 metric tons per size. For mixed-container orders combining multiple specifications, we accept a total minimum of 10 metric tons.

Do you provide material test certificates?

Yes. Every order ships with EN 10204 Type 3.1 certificates covering chemical composition, mechanical properties, zinc coating weight, and hydrostatic test results.

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What is the typical delivery time?

Stock items ship within 7–10 business days. Custom-produced zinc coated steel pipe with specific coating weights or non-standard lengths requires 20–30 days from order confirmation.

Can you cut to custom sizes?

Absolutely. We offer precision cut-to-length service, threading, grooving, and beveling. Custom lengths from 0.5m to 12m are available upon request with a tolerance of ±5mm.

Get a Competitive Quote for Zinc Coated Steel Pipe

Ready to secure factory-competitive pricing on galvanized steel tubing for your next project? Contact our sales team today with your required specifications—diameter, wall thickness, coating standard, and quantity. We respond to all inquiries within 12 hours with a detailed quotation including FOB, CFR, or CIF terms tailored to your destination port.

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Ratings & Reviews

5.0

Very satisfied

Based on 8 reviews for verified purchases

Supplier service

5.0

On-time shipment

5.0

Supplier service

5.0

Wei Chen

Singapore

verified purchases

2025-02-11

Acceptable Galvanized Pipe Quality, Packaging Issue Resolved
Ordered 8 tons of 1-1/2" and 2" galvanized pipe, plain ends, for distribution to construction clients in Southeast Asia. Material quality itself met JIS G3444 requirements and zinc coating was uniform with no bare spots observed. However, upon arrival at Singapore port, approximately 15% of bundles had damaged plastic end caps, exposing pipe ends to moisture during transit. Raised this with the supplier immediately and they responded within a few hours, offering partial credit for any end treatment costs we incurred. Issue was documented and they confirmed updated packaging protocol for future orders. Underlying product quality is acceptable — we'll likely trial another order to see if the packaging improvement holds.

Chris Martin

Canada

verified purchases

2025-03-07

Excellent Threaded Galvanized Pipe for Gas Distribution Network
Procured 20 tons of 1" to 2-1/2" threaded and coupled galvanized steel pipe for a low-pressure natural gas distribution project in Ontario. All pipe was supplied with NPT threading and the coupling fit was verified by our field crews without any rework required — a detail that matters significantly on tight installation schedules. EN 10204 3.1 certificates covered chemical composition, tensile strength at 438 MPa, and zinc coating weight at 395 g/m². We compared pricing with two domestic distributors and saved approximately 11% by sourcing direct from this mill on FOB terms. Cleared Canadian customs without documentation issues. Already submitted our next inquiry for a 25-ton follow-up order.

William Taylor

Australia

verified purchases

2025-03-30

Reliable Galvanized Pipe for Offshore Support Structure
Ordered 10 tons of 4" and 6" galvanized pipe, SCH 80, for structural support frames on a coastal marine facility in Queensland. Zinc coating weight at 380 g/m² was adequate for our application, though we had originally requested 450 g/m² minimum — the sales team clarified this upfront before production and we adjusted our spec accordingly, which we appreciated. Hydrostatic test certificates and ASTM A53 compliance documentation were complete and accepted by our client's certifying authority. Delivery was 26 days from order, fitting within our project window. Would consider this supplier again for future orders where standard coating weights are sufficient.

Carlos Silva

Brazil

verified purchases

2025-04-16

Premium Galvanized Steel Tubing for Scaffolding Contract
Our company has been purchasing galvanized scaffolding tube from this mill for over two years — this latest order was 42 tons of 48.3mm OD, 3.2mm wall, hot-dip galvanized per BS 1387. Coating adhesion testing results were provided with each coil number traceable to the batch certificate. Threaded and coupled end finish was clean with no cross-threading issues noted by our assembly crew. Price held stable from our previous order three months ago despite market fluctuations, which we genuinely appreciate for contract budgeting. Delivery to Santos port took 31 days on CIF terms. This is our fifth repeat order — consistent quality every time.

Ahmed Al-Hassan

UAE

verified purchases

2025-05-08

Superior Zinc Coated Pipe for Irrigation Pipeline in Desert Climate
Placed an order for 35 tons of hot-dip galvanized pipe, 3" to 6" OD, SCH 40, for an agricultural irrigation network in Abu Dhabi. Given the harsh desert environment, we specifically required coating weight above 400 g/m² — received material averaging 455 g/m² confirmed by our third-party inspector. Base material Q345B mechanical properties were verified: yield strength 358 MPa, tensile 512 MPa, both exceeding stated minimums. ISO 9001:2015 certification and full traceability documentation gave our project owner confidence during approval review. Shipment arrived at Jebel Ali port within 28 days from order confirmation. This supplier clearly understands demanding field conditions.

Hans Mueller

Germany

verified purchases

2025-06-02

Good Value Galvanized Pipe for HVAC Conduit Application
Sourced 12 tons of DN50 and DN80 galvanized steel pipe for HVAC conduit and ventilation support frames across three industrial facilities. Pricing was competitive — we compared quotes from four suppliers and this mill came in 8% lower on CIF Hamburg terms. Material quality met EN 10255 requirements and coating weight tested at 310 g/m², acceptable for our indoor application. Minor point: two bundles arrived with slight surface rust at the pipe ends where the zinc was cut, though this was expected and easily treated on-site. Overall solid transaction and responsive sales team.

James Wilson

United Kingdom

verified purchases

2025-06-24

Excellent Pre-Galvanized Tubing for Greenhouse Frame Structures
Purchased 18 tons of zinc coated square and round tubing, 1" to 3" range, SCH 20, for a large commercial greenhouse framing project in Yorkshire. EN 10204 Type 3.1 certificates arrived with the shipment covering chemical composition and coating adhesion per ASTM A90 — everything matched our procurement spec. The cut-to-length service was precise; we requested 3.8m sections and tolerances were well within ±5mm. Our site engineer confirmed zero coating delamination after welding preparation. Quoted lead time was 22 days for custom lengths and they delivered on day 21.

Michael Johnson

United States

verified purchases

2025-07-09

Outstanding Galvanized Pipe for Municipal Water Project
Ordered 28 tons of hot-dip galvanized steel pipe, 2" and 4" OD, SCH 40, for a municipal water distribution upgrade. Zinc coating weight measured at 420 g/m² on our end, consistent with the 3.1 mill certificates provided. Hydrostatic test results at 2.5 MPa were all within spec per ASTM A53. Delivery completed in 9 business days to our Houston warehouse — right on schedule. This is our second order this year and quality has been identical across both batches. Will continue sourcing from this supplier for upcoming fire sprinkler contracts.