4″ Galvanized Steel Pipe (Commonly Known as 4-inch Galvanized Pipe). Nominal Diameter DN100, standard outer diameter 114.3mm. Manufactured from low-carbon mild steel via ERW high-frequency longitudinal welded pipe process, with hot-dip galvanizing on the exterior surface. It features strong zinc layer adhesion to resist atmospheric corrosion and delivers excellent rust protection.
Glory Steel is a professional manufacturer and supplier of 4-inch hot-dip galvanized steel pipes. We rigorously control weld quality, roundness and zinc layer uniformity for large-diameter steel pipes, offer a wide range of wall thickness options and support all end finishing treatments.
Specifications
| Item | 4″ Galvanized Steel Pipe |
|---|---|
| Nominal Size | 4 inch (DN100) |
| Standard Outer Diameter | 114.3 mm |
| Wall Thickness | 2.0mm – 6.0mm |
| Length | 1–12m cut lengths |
| Material Grade | Q195, Q235B, Q355B; ASTM A53 Grade A/B; EN S235JR / S355JR |
| Manufacturing Process | ERW Longitudinal Welded |
| Surface Treatment | Hot-dip galvanized, zinc coating 60–300g/㎡ |
| Pipe Ends | Plain end / Threaded (BSPT/NPT) / Grooved / Beveled |
| Standards | ASTM A53/A53M, ASTM A795, EN 10255, GB/T 3091 |
| MOQ | 10 metric tons |
Product Advantages
- High Flow Compatibility: The large outer diameter of 114.3mm enables high fluid throughput. It has a large section moment of inertia with strong bending and compression resistance.
- Corrosion & Weather Resistance: The hot-dip galvanizing process fully coats both inner and outer pipe walls, isolating the steel from soil, moisture and atmospheric attack. It offers superior weathering performance compared with ordinary painted pipes.
- Engineering Adaptability: Custom specifications (including material, process, zinc coating and pipe ends) available for your projects. Online non-destructive testing ensures sound welds and high structural integrity.
- Export-Friendly Packaging: To prevent dents and scratches common for large-diameter pipes, steel strapping bundles with hexagonal or square layout are adopted. Woven fabric wrapping can be added for moisture and impact protection. Ideal for loading into 20GP/40GP shipping containers.
Theoretical Weight Reference
| Wall Thickness | Theoretical Weight per Meter | Total Weight per 6m Length |
|---|---|---|
| 2.0mm | 5.54 kg/m | 33.2 kg |
| 3.0mm | 8.23 kg/m | 49.4 kg |
| 4.0mm | 10.88 kg/m | 65.3 kg |
| 5.0mm | 13.48 kg/m | 80.9 kg |
| 6.02mm | 16.10 kg/m | 96.6 kg |
Mechanical Properties
| Material Grade | Min Yield Strength | Min Tensile Strength | Min Elongation |
|---|---|---|---|
| Q195 | 195 MPa | 315 MPa | 26% |
| Q235B / S235JR | 235 MPa | 370 MPa | 26% |
| Q355B / S355JR | 355 MPa | 470 MPa | 21% |
Theoretical Working Water Pressure
| Wall Thickness (mm) | Recommended Maximum Working Pressure (MPa) |
|---|---|
| 2.0 | 0.35 |
| 3.0 | 0.55 |
| 3.5 | 0.65 |
| 4.0 | 0.78 |
| 4.5 | 0.90 |
| 6.02 (Sch 40) | 1.15 |
Load Capacity as Steel Structure Column
Based on 6-meter height, hinged at both ends, no eccentric load.
| Wall Thickness mm | Allowable Axial Load kN | Recommended Application |
|---|---|---|
| 2.0 | 48 | Light-duty simple supports |
| 3.0 | 82 | Short compression members |
| 3.5 | 115 | Greenhouse posts, billboard supports |
| 4.0 | 142 | High wind-load greenhouses, heavy-duty fencing |
| 4.5 | 170 | Auxiliary workshop columns |
| 6.02 | 238 | Main heavy steel structure columns |
Main Applications
- Municipal & Building Water Supply and Drainage: Main water supply pipelines, drainage risers, rainwater pipe networks.
- Agricultural Irrigation: Main transmission pipelines for large farms and orchards, deep well pump pipes.
- Structural Load-bearing: Heavy greenhouse frames, livestock fencing support posts, factory steel columns, billboard supports, photovoltaic brackets.
- General Industrial Use: Fluid transmission pipelines for ordinary factories, equipment supports, base framing for construction machinery.
Wall Thickness Selection by Project Usage
- 2.0mm – 2.5mm: Low-pressure irrigation, simple drainage, lightweight structures. Optimal cost solution.
- 3.0mm – 3.5mm: Conventional water supply & drainage, greenhouse load-bearing posts. Widely applicable.
- 4.0mm – 5.0mm: Fire protection pipes, medium-pressure water supply, highway guardrails.
- 6.02mm (Sch40): High-pressure fluid service, heavy-load structures, Sch 40 working conditions.
Container Loading Reference
For 20GP container with 6-meter fixed-length pipes, 4-inch DN100 galvanized pipe can normally load approximately 20–23 metric tons. Actual tonnage is affected by wall thickness, bundling method and loading plan. Final payload shall be subject to the actual loading scheme.
Glory Steel Plant, located in Tianjin, China, is an ISO 9001, and CE‑certified factory with an annual output of 100,000 tons. We specializing in the manufacture of galvanized pipes in a full range of sizes and cross-sections. Our best-selling products include 1-inch, 2-inch, and 3-inch round pipes, as well as galvanized square and rectangular pipes. Supply OEM/ODM solutions. With stable quality and comprehensive service, we export to over 120 countries.
