Galvanized Steel Pipes
Galvanized Steel Pipes for Construction, Structural and Industrial Applications
Choosing galvanized steel pipes involves more than selecting a diameter. The galvanizing process, zinc coating, wall thickness, steel grade and pipe section all affect how the product fits your fabrication and installation requirements.
We supply hot-dip galvanized round steel pipes, hot-dip galvanized square and rectangular pipes, and pre-galvanized steel tubes. Our range covers different dimensions, material grades, coating specifications, lengths and processing options for construction, fencing, greenhouse structures, machinery frames and general industrial applications.
01. Galvanized Steel Pipe Types & Product Selection
Hot-Dip Galvanized Round Steel Pipes
Our hot-dip galvanized round pipes feature a zinc coating applied through a hot-dip galvanizing process. We offer different outside diameters and wall thicknesses for structural fabrication, outdoor fencing, infrastructure and general industrial applications.
The round section is suitable for applications requiring cylindrical pipe dimensions, while the zinc coating provides a protective layer against environmental exposure and corrosion.
Pre-Galvanized Steel Tubes
Pre-galvanized tubes are manufactured from zinc-coated steel strip, with the coating applied before tube forming and welding. They are suitable for furniture frames, fencing, light structural frameworks and general metal fabrication where pre-galvanized surface specifications meet the application requirements.
Because the steel strip is galvanized before welding, the weld seam may require additional zinc protection depending on the intended application.
Hot-Dip Galvanized Square and Rectangular Pipes
We supply galvanized square and rectangular hollow sections for building frames, greenhouse structures, scaffolding, curtain wall supports, solar support structures and machinery frames.
Their flat faces provide practical surfaces for cutting, fabrication and structural connections. Square and rectangular sections also offer an alternative to round pipes when the design requires a defined hollow-section profile.
02. Galvanized Steel Pipe Specifications & Standards
Round Pipe Specifications
Hot-Dip Galvanized Round Pipe
| Specification | Available Range or Options |
|---|---|
| Manufacturing type | ERW / hot-dip galvanized |
| Outside diameter | 1/2"–24" (21.3–600 mm) |
| Wall thickness | 0.8–25 mm |
| Zinc coating thickness | 35–200 μm |
| Steel grades | Q235, Q345, S235JR, S275JR, STK400, STK500, S355JR, GR.B-D |
| Length | According to order requirements |
Pre-Galvanized Round Tube
| Specification | Available Range or Options |
|---|---|
| Manufacturing type | ERW / pre-galvanized |
| Outside diameter | 1/2"–4" (21.3–114.3 mm) |
| Wall thickness | 0.6–2.5 mm |
| Zinc coating thickness | 5–25 μm |
| Steel grades | Q195–Q235 |
| Length | 5–12 m |
Additional Pre-Galvanized Tube Specification
Another listed pre-galvanized tube specification includes:
| Specification | Available Options |
|---|---|
| Outside diameter | 1/2"–8" |
| Steel grades | Q195–Q235 |
| Pipe schedules | Sch 40, STD, Sch 10 |
| Length | 5–12 m |
| Standards | BS 1387/1985, EN 10219-2:1997 |
Square and Rectangular Pipe Specifications
| Specification | Available Range or Options |
|---|---|
| Cross-section | Square and rectangular |
| Steel grades | 10#, 20#, 45#, 16Mn, ASTM A53 Grade A/B, Q235, Q345, Q195, Q215, St37, St42, St37-2, St35.4, St52.4, ST35 |
| Zinc coating weight | 40–600 g/m² |
| Available lengths | 5–14 m, including 5.8 m, 6 m, 10–12 m and 12 m options |
| Length types | Single random length, double random length and specified options |
| End options | Plain, beveled, cut square, grooved, threaded and coupled |
| Surface options | Galvanized, PVC, black paint, colored paint, transparent oil and anti-rust oil |
| Listed MOQ | 1 ton |
Applicable Standards
Hot-Dip Galvanized Round Steel Pipes
BS 1139-1775, EN 1039, EN 10219, JIS G3444:2004, GB/T 3091-2001, BS 1387-1985, DIN EN 10025, ASTM A53 SCH40/80/STD and BS EN 10255-2004.
Pre-Galvanized Steel Tubes
BS 1387/1985 and EN 10219-2:1997.
Hot-Dip Galvanized Square and Rectangular Pipes
API 5L, ASTM A53-2007, ASTM A671-2006, ASTM A252-1998, ASTM A450-1996, ASME B36.10M-2004, ASTM A523-1996, BS 1387, BS EN 10296, BS 6323, BS 6363, BS EN 10219, GB/T 3091-2001, GB/T 13793-1992 and GB/T 9711.
The applicable standard depends on the selected pipe type, steel grade and order specification.
03. Customization & Processing Options
We offer specific dimensional, surface and processing options across our galvanized steel pipe range.
Dimensions and Materials
Available specification options include:
- Outside diameter or square and rectangular section dimensions
- Wall thickness
- Available steel grades
- Standard and specified pipe lengths
- Zinc coating thickness or coating weight according to the product range
Round Pipe Surface and Processing Options
Listed round pipe options include:
- Hot-dip galvanizing
- Pre-galvanized finish
- Electro-galvanized finish
- Black pipe
- Painted surface
- Threaded ends
- Socket connections
- Marking
Square and Rectangular Pipe End Processing
Available processing options include:
- Plain ends
- Beveled ends
- Square-cut ends
- Grooved ends
- Threaded ends
- Couplings
- Plastic protective caps at both ends
Square and Rectangular Pipe Surface Treatment
Available options include:
- Galvanized finish
- PVC coating
- Black paint
- Colored paint
- Transparent oil
- Anti-rust oil
These options provide different pipe finishes and end configurations for fabrication, connection and installation requirements.
04. Manufacturing Background & Quality Inspection
Steel Manufacturing and Product Supply
Established in 2012, we operate in the steel manufacturing and supply industry. Our product portfolio includes:
- Steel coils and steel sheets
- Steel strips
- Galvanized steel pipes
- Steel angles
- H-beams and other steel products
Our company profile lists a site area of 600,000 m² and a building area of 10,000 m². We serve customers in 109 countries and regions.
Our company information also identifies production facilities, technical personnel and inspection activities as part of our business operations.
Product Inspection Requirements
For galvanized steel pipe orders, relevant inspection items include:
- Outside diameter and square or rectangular section dimensions
- Wall thickness
- Pipe length
- Zinc coating thickness or weight
- Surface condition
- Material and product documentation
These items cover the main dimensional, material and coating specifications used when evaluating galvanized steel pipes.
05. Packaging & Bulk Supply
We provide different packaging methods according to pipe type, dimensions and transportation requirements.
Round Galvanized Steel Pipes
- Large-diameter pipes: bulk packing
- Small-diameter pipes: steel-strip bundling
- Woven fabric packaging
- Other arrangements according to order requirements
Square and Rectangular Galvanized Pipes
- Bundled packing
- PVC protective packaging in different colors
- Packaging according to order requirements
Bundle weight, packaging method and shipping requirements can be specified when requesting a quotation.
06. Galvanized Steel Pipe FAQ & RFQ
What is the difference between hot-dip galvanized and pre-galvanized steel pipes?
Hot-dip galvanized pipes receive a zinc coating through hot-dip galvanizing. Pre-galvanized tubes are formed from steel strip that has already been galvanized before forming and welding. The coating process and resulting surface characteristics differ.
What zinc coating specifications can you supply?
Our listed ranges include 35–200 μm for hot-dip galvanized round pipes, 5–25 μm for pre-galvanized round tubes and 40–600 g/m² for hot-dip galvanized square and rectangular pipes.
How can I request a galvanized steel pipe quotation?
Send us your product type, required dimensions, wall thickness, steel grade, applicable standard, zinc coating requirement, estimated quantity and destination country. Drawings or additional processing and packaging requirements can also be included.
We will review your specifications and prepare a quotation based on the selected product and order requirements.