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| Property | Parameter | Description |
|---|---|---|
| Product Name | Galvanized Steel Pipe for Construction Use | Hot-dip or electro-galvanized welded/seamless steel pipe used in structural and construction applications |
| Material Grade | Q235B / Q355B (GB); S235JR / S355JR (EN); ASTM A53 Gr.A / Gr.B | International equivalents: S235JR ≈ Q235B; S355JR ≈ Q355B; ASTM A53 Gr.B ≈ Q345B |
| Standard Compliance | GB/T 3091, ASTM A53, EN 10255, JIS G3442 | GB/T 3091: Low-pressure fluid welded steel pipe; ASTM A53: Standard specification for pipe, steel, black and hot-dipped zinc-coated |
| Chemical Composition (C) | ≤ 0.25% (Q235B); ≤ 0.20% (A53 Gr.B) | Carbon content controls weldability and strength |
| Chemical Composition (Mn) | ≤ 1.40% (Q355B); ≤ 1.20% (A53 Gr.B) | Manganese enhances tensile strength and toughness |
| Chemical Composition (P / S) | P ≤ 0.045%; S ≤ 0.045% | Phosphorus and sulfur limits per GB/T 3091 and ASTM A53 to ensure ductility |
| Tensile Strength | ≥ 415 MPa (A53 Gr.B); ≥ 470 MPa (Q355B per GB/T 3091) | Minimum tensile strength ensuring structural load-bearing capacity |
| Yield Strength | ≥ 240 MPa (Q235B); ≥ 355 MPa (Q355B); ≥ 240 MPa (A53 Gr.B) | Minimum yield strength for construction structural requirements |
| Elongation | ≥ 21% (Q235B); ≥ 20% (A53 Gr.B) | Minimum elongation at fracture indicating material ductility |
| Outer Diameter (OD) | DN15 – DN600 (15 mm – 630 mm OD) | Available in standard nominal bore sizes per GB/T 3091, ASTM A53, and EN 10255 |
| Wall Thickness | 1.8 mm – 20 mm | Schedule 20, 40, 80 (ASTM); Light / Medium / Heavy series (GB/EN) |
| Length | 4 m – 12 m (customizable) | Standard random lengths; fixed lengths available upon request |
| Zinc Coating (Hot-Dip) | ≥ 45 µm (average); ≥ 600 g/m² (ASTM A53) | Hot-dip galvanizing per ASTM A123 / GB/T 13912 for superior corrosion resistance |
| Surface Finish | Hot-Dip Galvanized (HDG) / Electro-Galvanized | Uniform zinc coating; smooth finish; free from cracks, blisters, and flux inclusions |
| Application | Scaffolding, structural framing, water supply lines, HVAC, fire protection systems, fencing | Widely used in residential, commercial, and industrial construction projects |
| Certification | ISO 9001, CE Marking, API, SGS, BV | Third-party inspection and mill test certificates (MTC) available per EN 10204 3.1 |
| Packaging | Bundled with steel strips; both ends capped; waterproof paper or plastic wrapping | Bundle weight: 1–3 MT; custom labeling and marking available |
| MOQ | 5 Metric Tons | Lower MOQ negotiable for mixed specifications; spot stock available for standard sizes |
Initial coating query raised — resolved promptly, product now confirmed acceptable
We ordered 40 MT of 48.3 mm and 60.3 mm OD galvanized scaffolding pipe for a construction project in Dubai. On arrival, our QC team flagged that coating thickness readings on roughly 8% of pipes in one bundle measured closer to 42 µm rather than the 45 µm minimum specified. We raised this with the supplier immediately. They responded within four hours, reviewed our measurement report, and arranged a partial replacement shipment at no additional cost within 12 days. The replacement batch fully conformed. Issue was handled professionally and we would consider ordering again with tighter pre-shipment inspection agreed upfront.
We ordered 40 MT of 48.3 mm and 60.3 mm OD galvanized scaffolding pipe for a construction project in Dubai. On arrival, our QC team flagged that coating thickness readings on roughly 8% of pipes in one bundle measured closer to 42 µm rather than the 45 µm minimum specified. We raised this with the supplier immediately. They responded within four hours, reviewed our measurement report, and arranged a partial replacement shipment at no additional cost within 12 days. The replacement batch fully conformed. Issue was handled professionally and we would consider ordering again with tighter pre-shipment inspection agreed upfront.
