What is a Spiral Pipe?
A spiral pipe is a type of steel pipe manufactured using hot-rolled steel coils that are helically wound and welded. Thanks to its unique construction, it offers high strength and excellent resistance to both internal and external pressures. The smooth internal surface reduces friction and improves fluid flow.
Advantages of Spiral Pipe
Content list
High Strength: Withstands internal and external pressure effectively.
Unlimited Lengths: Can be produced in long lengths without additional seams.
Low Pressure Drop: Smooth inner wall reduces flow resistance.
Cost-Effective: Lower production costs compared to other types of pipes.
Flexible Production: Available in various diameters and wall thicknesses.
Spiral Pipe Production Process
There are two main production methods:
One-Step Method: The steel coil is spirally formed and welded simultaneously.
Two-Step Method: The coil is first shaped and then welded separately.
In both methods, Submerged Arc Welding (SAW) is used to ensure high-quality seam welds.
Applications of Spiral Pipes
Oil & Gas Industry: Transmission of crude oil, natural gas, and other fluids.
Water and Sewage: Urban and rural networks.
Chemical Industry: Transport of corrosive substances.
Construction: HVAC and heating systems.
Bridge and Structural Projects: Ideal for large-scale infrastructure.
Technical Specifications
Diameter: 8 to 120 inches.
Wall Thickness: 5 to 25 mm.
Length: Typically 6 to 12 meters.
Standards: API 5L, AWWA C200, DIN 1626, etc.
Spiral Pipe Pricing
Depends on:
Steel sheet quality (imported sheets cost more)
Diameter and wall thickness
Welding and manufacturing costs
Why Choose Mahyar Sepahan?
Fully automated production lines
International quality control
Expert consultation
Secure packaging and delivery
Comparison with Other Pipe Types
| Type | Features |
|---|---|
| Spiral (Helical) | Cost-effective, high-diameter, suitable for fluid transport |
| Seamless | No welds, high pressure resistance, higher cost |
| Straight-Seam | Fast production, limited diameter, suitable for medium pressures |
Spiral Pipe Coatings
For anti-corrosion:
Hot-dip Galvanization
FBE Coating
3-Layer Polyethylene
Industrial Bitumen
Spiral Pipe in Iran’s Market
Spiral pipes are a top choice for contractors due to:
Local production
Cost-efficiency
Use in national projects
Innovations in Production
Robotic welding
Real-time quality control
Earthquake-resistant edges
Notable Projects
Water transfer from Zayandeh-Rood to Yazd
Urban sewage in Isfahan
Oil projects in Asaluyeh
Export to Iraq
Spiral Pipe Checklist (for Contractors)
| Parameter | Description |
|---|---|
| Fluid Type | Defines coating and thickness |
| Project Pressure | Determines welding and testing requirements |
| Diameter/Thickness | Must align with engineering design |
| Coatings | Based on environmental conditions |
| Certifications | API, ISO, EN |
| NDT Testing | UT, RT, Hydro tests |
Engineering to Order (ETO)
Custom designs
Material and angle calibration
Advanced testing
Technical booklet included
Final Verdict
Spiral steel pipes are among the most efficient and economical solutions for large-scale fluid transport. With technical, economic, and environmental benefits, Mahyar Sepahan stands as a trusted supplier with high-quality products and full technical support.
Contact Us
For price inquiries and technical consultation:
Head Office: +98 9121180029
WhatsApp: +98 9121180029
Online Form: mahyarsepahan.com/contact
