Q235 Galvanized Steel Pipe/Tube
- Alloy or Not: Non-alloy
- Type: Welded pipe
- Technique: ERW/HFW, EFW, DSAW/SSAW etc.
- Size: As requested; details see product parameters
- Section Shape: Round, Square, Rectangular, Oval, etc.
- Galvanization: Hot-dip, Electro, Pre
- Processing Service: Cutting, Punching, Bending, Welding, Decoiling, etc.
- Certification: ISO 9001, CE
- Inspection: SGS, TUV, Factory Inspection
- Origin: Hubei/Henan/Jiangsu, China
- Port: Qingdao, Tianjin, Lianyungang
- MOQ: 5 tons (or as per negotiation)
- Delivery Time: 8-14 Days
- Payment: T/T, L/C
Product Detail
Q235 galvanized steel pipe, made from low-carbon Q235 steel, offers excellent plasticity, weldability, and structural stability. With a tensile strength of 370-500 MPa and a yield strength of at least 235 MPa, it’s well-suited for load-bearing applications.
The galvanization process—either hot dip or cold—adds a protective zinc layer. Hot dip involves immersion in molten zinc, forming a thick layer ideal for high-corrosion environments. Cold galvanization, meanwhile, applies a thinner zinc coating suited for drier conditions. This zinc layer provides long-term rust protection, often lasting decades in outdoor or humid environments.
Q235 galvanized pipes are lightweight and easy to weld, retaining stability post-welding, which simplifies installation and transportation. Given these features, it’s a reliable choice for projects needing structural support, fluid transport (e.g. water and gas), cable protection, greenhouses, and municipal engineering. These pipes are easy to process, allowing for cutting, drilling, and bending, which supports customized and specialized structural applications.
Contact us if you are unfamiliar with this product or have unsolved questions.
Features
Q235 galvanized steel pipes/tubes could bring the following benefits to your project:
- Corrosion-Resistant – Galvanized coating prevents rust, suitable for indoors and outdoors.
- High Strength – Strong load-bearing capacity for heavy structures.
- Easy to Weld – Simple to weld and customize for various needs.
- Cost-Effective – High strength and durability at a low cost.
- Low Maintenance – Long-lasting protection reduces upkeep.
Construction
Building frames, scaffolding, support beams, roofing structures, etc.
Oil & Gas
Pipeline systems, drilling rigs, offshore platforms, storage tanks, etc.
Automotive
Chassis components, exhaust systems, frame reinforcements, protective barriers, etc.
Electrical Utilities
Power poles, substation structures, electrical conduit systems, cable support systems, etc.
Water Management
Water pipelines, sewage systems, irrigation systems, water treatment plant structures, etc.
Telecommunications
Antenna towers, communication poles, satellite support structures, relay towers, etc.
Product Parameters
| Parameter | Details | |
|---|---|---|
| Standard | GB/T 700, GB/T 3091, GB/T 13912, ASTM A53, EN 10240, ISO 1461, GB/T 21835, GB/T 13793, ASTM A500, EN 10219, EN 10210, JIS G3444, JIS G3452, BS EN 10217, GB/T 3092-1993, AS 1074, etc. | |
| Grade | Q235A, Q235B, Q235C, Q235D | |
| Deoxidation Method | F (Rimmed), Z (Killed), TZ (Special Killed) | |
| OD (Outer Diameter) | Pipe | 21.3 – 219 mm; or as requested |
| Tube | 10 – 114 mm; or as requested | |
| WT (Wall Thickness) | Pipe | 2.0 – 12.0 mm; or as requested |
| Tube | 0.5 – 6 mm; or as requested | |
| Length | Pipe | Standard 6m or 12m; or as requested |
| Tube | Standard 6m; or as requested | |
| Tolerance | ±1%, or as requested | |
| Section Shape | Round, Square, Rectangular, Oval, etc. | |
| Galvanization | Hot-Dip Galvanizing, Electro-Galvanizing, Pre-Galvanizing | |
| Zinc Coating | Z30-600 g/m² | |
| Technique | 1) Electric Resistance Welding / High-Frequency Welding (ERW / HFW) ; 2) Electric Fusion Welding (EFW) ; 3) Double Submerged Arc Welding / Spiral Submerged Arc Welding (DSAW / SSAW) |
|
| End | Plain (PE), Beveled (BE), Threaded (TE), Grooved, or as requested | |
| End Protector | Plastic caps, Metal end caps | |
| Pipe Fittings | Elbows, Tees, Couplings, Threaded, Flanges, Caps, etc. | |
| Surface Treatment | 1) Skin Pass, Sand Blasted 2) Pre-painted 3) Galvanized 4) Oiled 5) Passivated 6) 3LPE, FBE, or other anti-corrosive coatings 7) As requested |
|
| Testing Method | Hydrostatic Test, NDT, Tensile Test, Bending Test, Adhesion Test, Coating Thickness Test, etc. | |
| Application | Building frames, scaffolding, support beams, roofing structures, pipeline systems, storage tanks, chassis components, exhaust systems, power poles, electrical conduit systems, water pipelines, irrigation systems, antenna towers, communication poles, etc. | |
| Certification | Approved by ISO 9001, CE | |
| Packaging | Standard seaworthy packing, or as requested | |
Material Specifications
Chemical Composition
| Steel Grade | Quality Grade | C % (≤) | Si % (≤) | Mn % (≤) | P % (≤) | S % (≤) |
|---|---|---|---|---|---|---|
| Q235 | Q235A | 0.22 | 0.35 | 1.4 | 0.045 | 0.05 |
| Q235 | Q235B | 0.2 | 0.35 | 1.4 | 0.045 | 0.045 |
| Q235 | Q235C | 0.17 | 0.35 | 1.4 | 0.04 | 0.04 |
| Q235 | Q235D | 0.17 | 0.35 | 1.4 | 0.035 | 0.035 |
*According to GB/T 700-2006.
Mechanical Properties
| Thickness (mm) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Absorbed Energy KV2 (J) |
|---|---|---|---|---|
| ≤16 | 370-500 | ≥235 | ≥26 | ≥27 |
| >16 ~ 40 | 370-500 | ≥225 | ||
| >40 ~ 60 | 370-500 | ≥215 | ≥25 | |
| >60 ~ 100 | 370-500 | ≥215 | ≥24 | |
| >100 ~ 150 | 370-500 | ≥195 | ≥22 | |
| >150 ~ 200 | 370-500 | ≥185 | ≥21 |
*Test temperatures of Impact Absorbed Eenergy are 20℃, 0℃, -20℃.
Why Choose Us
Consistent Quality
We address your primary coating quality concerns with Q235 galvanized steel pipes/tubes — such as coating uniformity, potential missed spots, and coating adhesion — through continuous hot-dip galvanizing processes & strict control of temperature and timing, non-destructive thickness testing with magnetic gauges, and multi-step-pre-treatment, including acid cleaning and surface preparation, to ensure consistent performance, corrosion resistance, and long-lasting durability across various environments.
Precise Dimensions
We guarantee the dimensional accuracy of our Q235 galvanized steel pipes, maintaining tight tolerances within ±0.01mm through precision equipment and ISO 9001-certified processes. Every batch undergoes 100% inspection, with zero deviation complaints in the past 5 years. We ensure smooth project execution without installation delays.
Stable Supply
We have 3 factories with a combined annual capacity of over 500,000 tons. In the event of any unforeseen circumstances, we can coordinate across factories to ensure stable production and on-time delivery.
Stable & Competitive Pricing
We maintain upstream raw material suppliers with price-lock agreements in place to effectively manage material cost fluctuations. Also, considering that our clients may face pressure from market changes, we will try our best to offer reasonable discounts to both new and existing clients.
Secure Packaging & Shipping
Packaging can be customized according to your requirements. We provide transparent, real-time photos of the packaging and loading process for your verification. You can also choose your trusted freight forwarder for transportation to ensure the entire logistics process is secure and reliable.
About Us
Founded in 1999, SteelPRO Group operates three factories with a combined annual production capacity of over 500,000 tons. We specialize in manufacturing a wide range of steel products, including round steel, profiles, plates, and pipes. Our portfolio encompasses low-alloy structural steel, tool steel, special steel, and more.
With strict adherence to global standards such as GB, ASTM, DIN, EN, and JIS, we ensure high-quality products, including heat-treated, machined, and prestressed steel. Our solutions are trusted by customers in diverse industries, and we proudly export to different countries across Europe, North America, and Asia.
At SteelPRO, we are dedicated to delivering tailored steel solutions and growing alongside our dear clients.
Certification
FAQ
What are your prices?
Our prices are subject to change depending on supply and market conditions. For an accurate and up-to-date quote, please contact our sales team directly.
Can you provide relevant documentation?
Yes, we can provide a wide range of documentation, including Certificates of Analysis/Conformance, Insurance, Certificates of Origin, and any other required export documents.
What is the average lead time?
As per mass production, the lead time is 5-20 days after:
1) we have received your deposit; 2) we have received your final confirmation on your orders.
If our lead time doesn’t meet your deadlines, please contact our sales directly in advance in case of any potential issues. We will try to accommodate your needs in all cases, and we are able to do so in most cases.
Can you provide free samples?
Yes, we can provide free samples for quality evaluation. However, shipping costs are generally covered by your company.
Can I visit your factory?
Of course! We welcome customers to visit our factory! Please contact us in advance to arrange a convenient time for your visit, and we will gladly organize a tour and provide any necessary information to ensure a productive visit.
Our Service
SteelPRO Group – manufacturer and solution provider for special steel, offering multi-industry application solutions and customised services, 100% quality free, accompanying customers in their growth!
Our Quality Control
- Roundness
- Tolerance
- Microstructure
- Non-Destructive Testing
- Destructive Testing
- Process Control
Service Integration Processing
- Welding
- Metal Fabrication
- CNC Machining
- Lathe
- Forming
