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| Property | Parameter | Description |
|---|---|---|
| Product Name | Welded Galvanized Steel Pipe | ERW carbon steel pipe with hot-dip galvanized coating |
| Base 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 (Electric Resistance Welded) | High-frequency welded longitudinal seam |
| Galvanizing Method | Hot-Dip Galvanized (HDG) | Per ASTM A123 / ISO 1461 |
| Zinc Coating Thickness | 60 - 100 µm | Equivalent to 275 - 610 g/m² |
| Carbon (C) | ≤0.25% | Carbon content for weldability |
| Manganese (Mn) | ≤1.35% | Improves strength and toughness |
| Phosphorus (P) | ≤0.035% | Controlled for ductility |
| Sulfur (S) | ≤0.035% | Low sulfur for weld quality |
| Tensile Strength | ≥330 MPa | Minimum tensile strength per ASTM A53 |
| Yield Strength | ≥205 MPa | Minimum yield strength |
| Elongation | ≥25% | Ductility in 50mm gauge length |
| OD Range | 21.3mm - 219.1mm (1/2'' - 8'') | Available outer diameter options |
| Wall Thickness | 1.0mm - 8.0mm | Standard and custom thickness |
| Length | 5.8m, 6m, 12m or custom | Standard and custom lengths available |
| Application | Water supply, fencing, scaffolding, structural support | Typical application scenarios |
| 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 |
Acceptable Galvanized Pipe Quality, Coating Variance Flagged and Resolved
Ordered 10 tons of galvanized welded pipe, 4-inch OD, 3.6mm wall, 6m lengths for a drainage support structure project in Leeds. Most of the batch performed well and the 3.1 MTCs were complete. However, our inspector found that roughly 15 pipes in one bundle showed zinc coating readings between 58–63μm, slightly below the 65μm lower bound specified. We raised this with the supplier immediately—they reviewed the inspection records, acknowledged the variance in that specific bundle, and arranged a partial replacement shipment within 11 days at no additional freight cost. The replacement pipes measured consistently above 80μm. Resolution was handled professionally. We would consider ordering again but will request bundle-level coating inspection records upfront next time.
Ordered 10 tons of galvanized welded pipe, 4-inch OD, 3.6mm wall, 6m lengths for a drainage support structure project in Leeds. Most of the batch performed well and the 3.1 MTCs were complete. However, our inspector found that roughly 15 pipes in one bundle showed zinc coating readings between 58–63μm, slightly below the 65μm lower bound specified. We raised this with the supplier immediately—they reviewed the inspection records, acknowledged the variance in that specific bundle, and arranged a partial replacement shipment within 11 days at no additional freight cost. The replacement pipes measured consistently above 80μm. Resolution was handled professionally. We would consider ordering again but will request bundle-level coating inspection records upfront next time.
