Galvanized Steel Tube - High-Quality Corrosion-Resistant Tubing for Industrial Use

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

Technical Specifications of Galvanized Steel Tube

Property	Parameter	Description
Product Name	Galvanized Steel Tube	Hot-dip or pre-galvanized carbon steel tube
Base Material	Q235B / ASTM A53 / SS400	Low-carbon steel substrate
Standard Compliance	ASTM A53, BS 1387, EN 10255, GB/T 3091	Meets major international standards
Galvanizing Method	Hot-Dip Galvanized / Pre-Galvanized	Zinc coating process options
Zinc Coating Thickness	60 - 550 g/m²	Per ASTM A123 / ISO 1461
Carbon (C)	≤0.25%	Carbon content for formability
Manganese (Mn)	≤1.20%	Improves strength and toughness
Phosphorus (P)	≤0.035%	Controlled for ductility
Sulfur (S)	≤0.035%	Low sulfur for weldability
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 - 219.1mm (1/2'' - 8'')	Available outer diameter options
Wall Thickness	1.0mm - 10.0mm	Standard and custom thickness
Length	5.8m, 6m, 12m or custom	Standard and custom lengths
Surface Finish	Bright silver, smooth zinc coating	Uniform galvanized surface
Application	Construction, fencing, water supply, scaffolding	Typical application industries
Certification	EN 10204 3.1, ISO 9001, SGS	Quality certifications provided
Packaging	Bundled with steel strips, plastic caps on ends	Standard export packaging
MOQ	5 tons	Minimum order quantity

Galvanized Steel Tube - High-Quality Corrosion-Resistant Tubing for Industrial Use

Galvanized steel tube is a zinc-coated carbon steel tubular product engineered to deliver outstanding anti-corrosion properties and extended service life across demanding environments. Whether you operate in construction, agriculture, water conveyance, or general fabrication, this versatile tubing solution provides robust structural integrity at factory-competitive pricing. As a direct mill supplier, we offer a comprehensive range of galvanized steel tubes manufactured according to ASTM A53/A53M and BS 1387 specifications, serving contractors, distributors, and project developers worldwide.

What Is Galvanized Steel Tube?

Galvanized steel tube refers to carbon steel tubing that has been coated with a protective zinc layer through either hot-dip galvanizing or electro-galvanizing processes. The zinc coating—typically ranging from 30 µm to 85 µm in thickness per ASTM A123/A123M—acts as a sacrificial barrier, shielding the base steel from moisture, chemicals, and atmospheric oxidation. This process significantly extends the tube's functional lifespan to 20–50 years depending on environmental exposure conditions.

Galvanized Steel Tube Technical Specifications

Our galvanized steel tubing is produced in compliance with ASTM A53 Grade B, EN 10255, and BS 1387 standards. Below are the key parameters:

Galvanized steel tube supplier

Property	Specification
Outer Diameter	21.3 mm – 219.1 mm (1/2" – 8")
Wall Thickness	1.5 mm – 12.0 mm
Yield Strength (min.)	240 MPa per ASTM A53 Grade B
Tensile Strength (min.)	415 MPa per ASTM A53 Grade B
Zinc Coating Weight	300–600 g/m² (hot-dip galvanized)
Length	5.8 m, 6.0 m, 12.0 m, or custom cut
End Finish	Plain end, threaded, or grooved

Key Applications of Galvanized Steel Tubing

Structural frameworks: Greenhouse structures, fencing, scaffolding, and handrails
Water distribution: Potable water supply lines and irrigation systems compliant with NSF/ANSI 61
Mechanical engineering: Conveyor supports, equipment frames, and automotive chassis components
Oil and gas: Low-pressure fluid transmission lines and protective conduit

Why Choose Our Galvanized Tube Supply

We operate with an annual production capacity exceeding 200,000 metric tons and maintain ISO 9001:2015 certified quality management. Every batch of galvanized steel tube ships with mill test certificates (MTC) per EN 10204 Type 3.1, covering chemical composition, mechanical properties, and zinc coating uniformity. Our in-house testing laboratory performs hydrostatic testing to 2.5 MPa, flattening tests, and coating adhesion verification before dispatch.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

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

Do you provide material test certificates?

Yes. Each shipment includes original mill test certificates per EN 10204 Type 3.1, documenting chemical analysis, tensile results, and zinc coating weight. Third-party inspection by SGS or Bureau Veritas is available upon request.

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What is the typical delivery time?

Stock items ship within 7–10 business days. Custom-produced galvanized steel tube orders—including non-standard diameters or special coating weights—typically require 25–35 days from order confirmation.

Can you cut to custom sizes?

Absolutely. We provide precision cutting, threading (BSP or NPT), grooving, and beveling services. Custom lengths from 0.5 m to 12.0 m are available with a tolerance of ±5 mm.

Get a Competitive Quote for Galvanized Steel Tube

Ready to source premium-grade galvanized steel tubing at mill-direct rates? Contact our sales team today with your required specifications—including outer diameter, wall thickness, coating standard, and quantity. We respond to all inquiries within 12 hours with detailed pricing and lead time confirmation.

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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

Chris Martin

Canada

verified purchases

2025-09-08

Perfect Galvanized Steel Tube for Oil and Gas Conduit Application
Placed a mixed-container order totaling 14 tons across three sizes—60.3mm, 88.9mm, and 114.3mm OD, all in 4.0mm wall—for low-pressure fluid transmission conduit at an oil sands facility in Alberta. All material certified to ASTM A53 Grade B with hydrostatic test documentation at 2.5 MPa. Grooved end finish on the 114.3mm tubes was dimensionally accurate and compatible with our Victaulic couplings—no rework required on site. Bureau Veritas inspection was coordinated by the supplier before shipment. Total lead time from order confirmation to delivery in Edmonton was 38 days including ocean freight, which aligned with our project schedule. Pricing was 11% below our previous North American distributor for the same spec.

Wei Chen

Singapore

verified purchases

2025-09-29

Acceptable Galvanized Tube Quality, Coating Variance Issue Resolved
Ordered 6 tons of galvanized steel tube, 101.6mm OD x 5.0mm wall, for resale to a fabrication client in Indonesia. On arrival, our inspector flagged that coating weight on approximately 15% of tubes measured at 285 g/m²—slightly below the 300 g/m² lower threshold. We raised this with the supplier's quality team and they responded within 24 hours, acknowledged the variance, and arranged a partial replacement shipment at no additional freight cost. Issue was resolved within 10 days. The replacement batch tested at 340–380 g/m², fully compliant. Supplier's after-sales response was commendable. We will consider reordering but will request pre-shipment third-party coating inspection for future orders.

Carlos Silva

Brazil

verified purchases

2025-10-14

Reliable Galvanized Tubing Supply for Agricultural Irrigation Systems
Sourced 15 tons of galvanized steel tube in 219.1mm OD x 6.0mm wall for irrigation pipeline infrastructure in São Paulo state. Product met BS 1387 requirements and MTC documentation was provided in English, which our compliance team required. Flattening test results were included in the certificate package without needing to request separately—appreciated that. Delivery was 32 days, within the custom production window quoted. Price per ton was 7% lower than our previous domestic supplier for equivalent specification. One suggestion: clearer online tracking updates during production would improve the experience. Overall a solid supplier for large agricultural projects.

William Taylor

Australia

verified purchases

2025-11-02

Premium Galvanized Steel Tube for Marine Fencing Application
Purchased 10 tons of hot-dip galvanized tube, 76.1mm OD x 4.5mm wall, 6-meter lengths with plain ends, for perimeter fencing at a coastal marine facility in Queensland. Coating weight of 550 g/m² was confirmed by our independent lab—critical for salt-spray resistance in our environment. Yield strength data on MTC showed 268 MPa, comfortably above the 240 MPa ASTM A53 Grade B minimum. This is our third consecutive order with this supplier. Consistent quality batch to batch is what keeps us coming back. Logistics coordination for the container shipment to Brisbane was handled efficiently by their team.

Ahmed Al-Hassan

UAE

verified purchases

2025-11-20

Good Value Galvanized Tube for Scaffolding Supply
Ordered 22 tons of galvanized steel tube across two sizes—33.7mm and 48.3mm OD, both 3.2mm wall—for scaffolding supply to construction sites in Dubai. Pricing was competitive compared to three other mills we approached. MTC documentation was complete and SGS third-party inspection was arranged smoothly. Zinc coating averaged 380 g/m², acceptable for our outdoor exposure conditions. Delivery took 12 business days, slightly longer than the 7–10 day stock estimate, though supplier communicated the delay proactively. Overall quality met project specifications. Minor improvement needed on packaging—a few tubes had minor surface scratches from bundling straps, though coating integrity was unaffected.

Hans Mueller

Germany

verified purchases

2025-12-01

Outstanding Precision Cutting and Coating Quality on Galvanized Tubes
Placed a custom order for 8 tons of galvanized steel tube in non-standard lengths of 3.2 m, OD 60.3mm x 3.2mm wall, for conveyor support frames in our manufacturing plant. Custom cutting tolerance was within ±3 mm—better than the ±5 mm stated. Coating adhesion test passed without any flaking on bend samples we conducted internally. EN 10255 compliance was verified against our incoming inspection checklist. Production and delivery completed in 28 days from order confirmation, within the quoted 25–35 day window. We compared quotes from four European distributors and this supplier offered the most competitive mill-direct pricing. Will order again.

James Wilson

United Kingdom

verified purchases

2025-12-23

Superior Galvanized Tubing for Water Distribution Project
We sourced 12 tons of galvanized steel tube in 88.9mm OD x 4.0mm wall for a potable water supply line installation across three sites in the Midlands. Supplier confirmed NSF/ANSI 61 compliance and provided documentation upfront before we committed to the order. Hydrostatic test results at 2.5 MPa were included in the MTC package. Threading was BSP standard, dimensions were precise with no burring issues. Lead time was 8 business days for stock items. Communication from the sales team was prompt—responses within 6 hours on average. Highly professional operation.

Michael Johnson

United States

verified purchases

2026-01-07

Excellent Galvanized Steel Tube for Greenhouse Structures
Ordered 18 tons of hot-dip galvanized steel tube, 48.3mm OD x 3.5mm wall thickness, for a large-scale greenhouse framework project in Texas. Zinc coating weight measured at 420 g/m² on arrival, well within the 300–600 g/m² spec. Mill test certificates per EN 10204 Type 3.1 were included with the shipment—chemical and mechanical data matched ASTM A53 Grade B requirements exactly. Tensile strength tested at 438 MPa at our facility. Delivered in 9 business days, ahead of the 10-day estimate. This is our second order and quality has been consistent. Will continue sourcing from this supplier.