Q195 Q215 Q235 Galvanized and Oil Coated ERW Welded Steel Pipes for Structural Applications
Q195 Q215 Q235 Galvanized and Oil Coated ERW Welded Steel Pipes for Structural Applications
1．Product Overview
Q195, Q215, and Q235 ERW welded steel pipes are designed for structural engineering, steel fabrication, machinery manufacturing, agricultural framework systems, transportation structures, furniture frames, and industrial applications.
The product is available in round, square, rectangle, and ellipse profiles. Different pipe shapes support different structural, decorative, and fabrication requirements. Galvanized, oil coated, and black surfaces can be selected according to corrosion protection, storage, and downstream processing needs.
2．Technical Solution
The pipe is manufactured by forming steel strip into the required profile and welding it through ERW technology. This process supports stable seam quality, consistent dimensional control, and efficient production for structural pipe applications.
Galvanized coating improves corrosion resistance for outdoor and humid environments. Oil coated surface provides temporary rust protection during storage and transportation. Black surface is suitable for welding, painting, machining, and secondary fabrication.
Steel grades such as Q195, Q215, Q235, SPHC, SPCC, 08Yu, and 08Al can be selected according to forming performance, welding performance, and structural strength requirements.
3．Specifications
| Parameter | Value |
|---|---|
| Product Type | ERW Welded Steel Pipe |
| Pipe Shape | Round / Square / Rectangle / Ellipse |
| Steel Grade | 08Yu / 08Al / SPHC / SPCC / Q195 / Q215 / Q235 |
| Surface Finish | Galvanized / Oil Coated / Black |
| Round Pipe Size | Φ13–Φ79.2mm |
| Round Pipe Thickness | 0.5–3.0mm |
| Round Pipe Size Tolerance | ±0.10mm to ±0.12mm |
| Square Pipe Size | 16×16mm–200×200mm |
| Square Pipe Thickness | 0.7–6.0mm |
| Square Pipe Size Tolerance | ±0.15mm to ±0.60mm |
| Rectangle Pipe Size | 10×20mm–150×250mm |
| Rectangle Pipe Thickness | 0.8–6.0mm |
| Rectangle Pipe Size Tolerance | ±0.20mm to ±0.60mm |
| Ellipse Pipe Size | Φ10–Φ20mm |
| Ellipse Pipe Thickness | 0.8–1.5mm |
| Ellipse Pipe Size Tolerance | ±0.20mm |
| Length | Customized |
| MOQ | 50 MT |
| Packing | Nude packing or standard export packing |
4．Application
This product is suitable for construction frameworks, structural supports, handrails, fencing, guardrails, machinery structures, welded assemblies, vehicle frames, trailer structures, greenhouse systems, pipe frameworks, furniture frames, decorative tubing, and general steel fabrication.
Round welded pipes are suitable for general construction and engineering use.
Square and rectangle welded pipes are commonly used for structural frames, support systems, and load-bearing fabrication.
Ellipse welded pipes are suitable for decorative structures, furniture components, and visible frame applications.
5．Processing
The product supports cutting, welding, punching, bending, drilling, galvanizing, painting, polishing, bundling, and general fabrication.
Customized length and additional surface treatment can be supplied according to project requirements.
6．Advantages
- ERW welding technology supports stable seam quality and dimensional consistency.
- Multiple steel grades are available for forming, welding, and structural applications.
- Galvanized, oil coated, and black surface finishes support indoor, outdoor, storage, and fabrication requirements.
- The wide size range supports both light-duty and heavier structural applications.
- The product is suitable for cutting, welding, bending, machining, and secondary processing.
- Multiple pipe profiles provide flexibility for structural and decorative applications.
7．How to Choose
- Choose galvanized welded pipe for outdoor structural use and humid environments.
- Choose oil coated pipe when temporary rust protection is required during storage or transportation.
- Choose black steel pipe for fabrication, welding, painting, and machining.
- Choose square or rectangle pipe for structural frameworks and support systems.
- Choose round welded pipe for general construction and engineering applications.
- Choose ellipse pipe for decorative structures and visible frame components.
- Choose Q235 when higher structural strength is required.
- Choose Q195 or Q215 for light forming and general fabrication applications.
8．FAQ
Q1．What pipe profiles are available
Round, square, rectangle, and ellipse welded steel pipes are available.
Q2．What steel grades can be supplied
08Yu, 08Al, SPHC, SPCC, Q195, Q215, and Q235 are available.
Q3．What surface treatments are available
Galvanized, oil coated, and black surface finishes are available.
Q4．Can customized lengths be supplied
Yes. Customized lengths can be produced according to project requirements.
Q5．What industries commonly use these welded steel pipes
The product is widely used in construction, industrial fabrication, transportation, infrastructure, agricultural engineering, furniture manufacturing, and general steel structures.
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