Red steel pipe, also known as red tube or painted steel pipe, is carbon welded steel pipe coated with red paint externally. The base material adopts low-carbon steel strip of Q195 and Q235B. The red coating provides anti-rust protection and identification function with economical price.
Glory Steel is a professional source manufacturer and export supplier of red painted steel pipes. Our products feature uniform paint finish, bright color, and strong paint film adhesion. A full range of sizes is in stock, with customized length and color available.
Specifications
| Item | Red Steel Pipe / Red Painted Steel Pipe |
|---|---|
| Material | Q195, Q235B, Q355B (equivalent to ASTM A36, ASTM A572 Gr.50, EN S185/S235JR/S355JR) |
| Manufacturing Process | ERW Longitudinal Welded Pipe |
| Outer Diameter | 21.3mm – 219.1mm (1/2” ~ 8”) |
| Wall Thickness | 1.2mm – 4.0mm |
| Length | 1- 12 m, customizable |
| Dry Film Thickness | 30–60μm |
| Surface | Single-coat red anti-rust paint, or primer + red topcoat (two coats) |
| Execution Standards | GB/T 3091, ASTM A53, EN 10219 |
| Deep Processing | Cutting, threading, punching, bending |
| Packing | Ocean export packing |
| MOQ | 10 Tons |
Features
- Superior anti-corrosion & weather resistance: Double protection with anti-rust primer plus red topcoat, isolating air and moisture. Resistant to rain and humid environments; hard to get rusty.
- High visibility: Bright striking red color meets visual warning requirements for construction and fencing works, easy to distinguish pipeline types on construction sites.
- Excellent structural performance: ERW longitudinal welded pipe delivers a dense weld seam, ensuring overall strength and load capacity. Paint coating resists peeling.
- Cost-effective: Low production cost and high cost performance for bulk procurement. Widely used for factories, warehouses, and farm structures across Europe, South America, and Africa.
Mechanical Property Reference
| Material Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Equivalent International Grade |
|---|---|---|---|
| Q195 | ≥315 | ≥195 | ≈ ASTM A36 / EN S185 |
| Q235B | ≥370 | ≥235 | ≈ ASTM A36 / EN S235JR |
| Q355B | ≥470 | ≥355 | ≈ ASTM A572 Gr.50 / EN S355JR |
Production Process
- ERW High-frequency Longitudinal Welding: Steel strip coil is formed into round tube and welded by high-frequency electric resistance welding, with full weld bead and controllable internal burrs.
- Red Coating: Air spraying process. After steel pipe surface derusting and dust removal, red anti-rust paint is applied.
- Economy type: Single coat red anti-rust paint
- Heavy-duty type: Anti-rust primer + red topcoat (two coats for better anti-corrosion) Custom colors available according to customer color card.
Applications
- Construction & Municipal: Scaffolding, formwork support, temporary site guardrails, pipe supports.
- Agricultural Facilities: Breeding fences, orchard supports, garden fence posts, agricultural irrigation pipes.
- Fluid Conveyance: Ordinary water supply & drainage, low-pressure irrigation water delivery.
- Fencing Fittings: Posts for 3D panel fence, cross rails for PVC-coated chain-link fence, vertical bars for seaside guardrails.
- Others: Fitness equipment tubes, light structural supports.
Project Consumption Reference
| Application | Wall Thickness (mm) | Diameter | Consumption per 100 meters |
|---|---|---|---|
| Farm Structural Support | 1.8~4.0 | DN20~DN80 | 2.2 MT |
| Irrigation Low-pressure Water Delivery | 2.0~4.0 | DN40~DN150 | 2.8 MT |
| Garden / Road Fence Post | 1.5~3.0 | DN25~DN50 | 1.5 MT |
Common Sizes
| Outer Diameter (mm) | Wall Thickness (mm) | Standard Length (m) |
|---|---|---|
| 20 | 1.2–2.0 | 6 |
| 25 | 1.5–2.0 | 6 |
| 32 | 1.5–2.5 | 6 |
| 48 | 2.0–3.0 | 6 |
| 60 | 2.5–3.5 | 6 |
| 76 | 3.0–4.0 | 6 |
| 114 | 4.0 | 6 |
Container Loading Reference
Based on 6m straight pipes.
| Specification | Unit Weight (kg) | 20GP Loading Capacity |
|---|---|---|
| DN25 SCH40 | 11.3 | 17–18 MT |
| DN50 SCH40 | 24.2 | 17–18 MT |
FAQs
Q: What is the difference between red painted steel pipe and galvanized pipe?
A: Red painted pipe is painted externally, while galvanized pipe is coated with metallic zinc. Galvanized pipe provides higher corrosion resistance, while red painted pipe delivers better color identification.
Q: How long can the paint film last?
A: Normally 3–8 years for outdoor service, subject to environment and film thickness. For high-humidity or strong UV regions, galvanized + painting or powder coating is recommended.
Q: Can red painted steel pipe be used for fire protection systems?
A: Ordinary red-painted pipe is NOT suitable for fire fighting systems. Fire pipes must comply with special standards such as ASTM A795.
Q: Can we customize other colors?
A: Yes. Besides red, blue, yellow, green, grey and other colors are available, customized per color card.
Q: Which regions do we export to?
A: Mainly Asia, the Middle East, Africa, South America, and Europe. We are familiar with local customs clearance and standard requirements.
Glory Steel Plant, located in Tianjin, China, is an ISO 9001, ISO 14001, and CE‑certified factory with an annual output of 100,000 tons. We specialize in the production of ERW pipes with various colored paint finishes—including red, yellow, black, blue, and green—for use in fencing, construction, and structural supports. As well as OEM/ODM solutions. With stable quality and comprehensive service, we export to over 120 countries.
