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| Property | Parameter | Description |
|---|---|---|
| Product Name | Galvanized Steel Pipes for Structural Construction | Hot-dip or electro-galvanized steel pipes designed for load-bearing and structural applications |
| Material Grade | Q235B / Q355B (GB); S235JR / S355JR (EN); ASTM A53 Gr.B; SS400 (JIS) | Low-carbon and high-strength structural steel grades with international equivalents |
| Standard Compliance | ASTM A53 / A500; EN 10219; GB/T 3091; JIS G3444 | Meets major international standards for structural and general-purpose galvanized steel pipes |
| Chemical Composition | C ≤ 0.26%, Mn ≤ 1.50%, Si ≤ 0.40%, P ≤ 0.035%, S ≤ 0.035% | Controlled chemistry ensures weldability, formability, and corrosion resistance after galvanizing |
| Tensile Strength | ≥ 415 MPa (ASTM A53 Gr.B); ≥ 470 MPa (S355JR / Q355B) | Minimum tensile strength values per respective standard for structural integrity |
| Yield Strength | ≥ 240 MPa (Q235B / S235JR); ≥ 355 MPa (Q355B / S355JR) | Adequate yield strength for columns, frames, and structural supports |
| Elongation | ≥ 20% (Q235B); ≥ 22% (ASTM A53 Gr.B) | Good ductility ensures energy absorption and resistance to structural deformation |
| Outer Diameter (OD) | 21.3 mm – 508 mm | Wide OD range covering DN15 to DN500 for various structural applications |
| Wall Thickness | 1.8 mm – 20.0 mm | Schedule 20 to Schedule 80 available; custom wall thickness upon request |
| Length | 6 m / 12 m (standard); 1 m – 18 m (custom) | Fixed or random lengths available; cut-to-length service supported |
| Zinc Coating | Hot-dip: ≥ 45 µm (≥ 275 g/m²); Electro-galvanized: 5–25 µm | Hot-dip galvanizing per ASTM A123 / ISO 1461 provides superior corrosion protection |
| Surface Finish | Hot-dip galvanized (HDG); Electro-galvanized; Pre-galvanized | Uniform zinc coating with smooth or spangled finish; free from cracks, blisters, and bare spots |
| Application | Building frames, scaffolding, bridges, fencing, greenhouse structures, utility poles | Widely used in civil construction, infrastructure, and industrial structural projects |
| Certification | ISO 9001:2015; CE Marking; SGS / BV Third-party Inspection; Mill Test Certificate (EN 10204 3.1) | Full quality documentation and third-party inspection available upon request |
| Packaging | Bundled in steel straps (1–3 MT/bundle); plastic end caps; waterproof woven bags or bare | Export-standard packaging to prevent zinc coating damage during ocean or land transport |
| MOQ | 5 MT per size / grade | Mixed container orders accepted; spot stock available for standard sizes |
Initial coating inconsistency flagged — supplier resolved promptly
We ordered 10 tons of 1.5-inch galvanized ERW pipes for conduit runs in a Florida commercial building project. During incoming QC, our inspector found zinc coating thickness on roughly 8% of pipes measured below 45 µm — below our ASTM A123 requirement. We raised a formal NCR with photos and measurement records. The supplier responded within 12 hours, acknowledged the issue, and arranged replacement of the affected quantity at no additional cost within 10 days. Final replacement batch met spec. Issue appears isolated. Willing to trial again on a smaller order before committing to larger volumes.
We ordered 10 tons of 1.5-inch galvanized ERW pipes for conduit runs in a Florida commercial building project. During incoming QC, our inspector found zinc coating thickness on roughly 8% of pipes measured below 45 µm — below our ASTM A123 requirement. We raised a formal NCR with photos and measurement records. The supplier responded within 12 hours, acknowledged the issue, and arranged replacement of the affected quantity at no additional cost within 10 days. Final replacement batch met spec. Issue appears isolated. Willing to trial again on a smaller order before committing to larger volumes.
