Spiral Welded Steel Pipe

Spiral Welded Steel Pipe is a high-performance large-diameter steel pipe produced by continuously forming hot rolled steel coils into a spiral shape and welding both the inner and outer seams using advanced submerged arc welding technology. Compared with traditional straight welded pipes, spiral welded steel pipes offer greater diameter flexibility, efficient production capability, and reliable structural strength, making them an ideal choice for large-scale engineering projects.

ZHONGTIAN provides customized spiral welded steel pipes with various diameters, wall thicknesses, steel grades, and surface protection options. As a professional China spiral welded steel pipe manufacturer and supplier, ZHONGTIAN supports customers in long-distance pipeline transportation, municipal water projects, foundation piling, structural engineering, and industrial pipeline systems with stable quality and reliable solutions.

Product Details

1. Manufacturing Structure and Production Process

Spiral welded steel pipe is manufactured by continuously forming steel strips into a spiral shape and welding the internal and external seams through submerged arc welding technology.

The production process includes:

Steel coil preparation → Spiral forming → Internal and external submerged arc welding → Ultrasonic/X-ray inspection → Pipe cutting → Surface treatment → Anti-corrosion coating → Final inspection → Packaging

Compared with traditional straight seam pipes, the spiral welding structure provides better stress distribution along the pipe body, making it suitable for large diameter applications and long-distance installation projects.

2. Main Specifications

ZHONGTIAN provides spiral welded steel pipes in various dimensions according to project requirements.

Customized sizes beyond standard ranges can be produced according to engineering requirements.

3. Performance Characteristics

1. Large Diameter Manufacturing Capability

One of the major advantages of spiral welded steel pipe is its ability to produce large diameter pipes using steel coils.

It is especially suitable for projects requiring pipes above 500mm diameter, where seamless or straight seam pipes may have limitations in production efficiency and cost.

2. Stable Structural Performance

The spiral welded structure distributes stress more evenly along the pipe body.

This improves resistance against external pressure, soil movement, and deformation, making it suitable for underground pipeline systems.

3. Cost-Effective Solution

Compared with seamless steel pipes of similar diameter, spiral welded steel pipes provide a more economical solution for large-scale transportation projects.

The efficient production process helps reduce material waste and overall project costs.

4. Reliable Welding Quality

Double-sided submerged arc welding technology provides strong weld performance.

Through ultrasonic testing, X-ray inspection, and production quality control, the risk of leakage and welding defects can be effectively reduced.

Applications

1. Municipal Water Supply and Drainage Projects

Spiral welded steel pipes are widely used in urban water pipelines, sewage systems, stormwater drainage networks, and water diversion projects.

Their large diameter capability makes them suitable for transporting large volumes of water over long distances.

2. Oil and Gas Transportation

With suitable material grades and corrosion protection systems, spiral welded steel pipes can be used for oil and gas transmission pipelines.

Steel grades such as L245, L360, and X-series pipeline steel are commonly selected according to pressure and transportation requirements.

3. Structural Engineering Projects

The pipes are commonly applied as foundation piles, bridge pile casings, marine structures, port construction supports, and underground reinforcement structures.

Their large diameter and high structural stability make them suitable for heavy engineering applications.

4. Industrial and Energy Pipelines

Spiral welded steel pipes are also used in heating networks, circulating water systems, chemical transportation pipelines, and industrial fluid transfer projects.

Corrosion Protection Solutions

1. 3PE Anti-Corrosion Coating

For underground pipeline projects, 3PE coating is commonly used to provide long-term protection against soil corrosion.

Under suitable conditions, the service life can exceed 30 years.

2. Epoxy Coal Tar Coating

For sewage pipelines and industrial environments, epoxy coal tar coating provides additional chemical resistance and moisture protection.

3. External Anti-Rust Treatment

For outdoor structural applications, anti-rust paint, galvanized treatment, or customized surface protection methods can be selected according to environmental requirements.

Applicable Standards

1. Pipeline Transportation Standards

ZHONGTIAN can provide products according to customer project specifications and required international standards.

Spiral Welded Pipe Compared with Other Steel Pipes

1. Comparison with Straight Seam Steel Pipe

2. Comparison with Seamless Steel Pipe

Quality Control

1. Welding Inspection

ZHONGTIAN applies strict inspection procedures including ultrasonic testing and welding quality verification to ensure reliable pipe performance.

2. Dimension Control

Pipe diameter, wall thickness, length, and straightness are inspected according to production requirements.

3. Surface Protection Inspection

Anti-corrosion coating thickness, adhesion, and surface condition are checked before delivery.

Why Choose ZHONGTIAN

1. Large Diameter Steel Pipe Manufacturing Capability

ZHONGTIAN specializes in manufacturing welded steel pipes for infrastructure, transportation, and structural applications.

The production capability covers large diameter pipes with customized specifications.

2. Customized Engineering Support

Different projects require different pipe grades, dimensions, and corrosion protection methods.

ZHONGTIAN provides customized solutions based on pressure requirements, installation environment, and application conditions.

3. Quality-Oriented Production

From raw material inspection to final testing, ZHONGTIAN follows controlled production procedures to ensure stable quality and reliable delivery.

FAQ

1. What is spiral welded steel pipe used for?

Spiral welded steel pipes are mainly used for water transportation, sewage pipelines, oil and gas transmission, foundation piles, and industrial pipeline systems.

2. What diameter range can spiral welded steel pipes achieve?

Typical production ranges from Φ219mm to Φ3620mm, with customized larger diameters available according to project requirements.

3. What materials are available for spiral welded pipes?

Common materials include Q235B, Q355B, L245, L360, and X-series pipeline steel grades.

4. How are spiral welded pipes protected against corrosion?

Different anti-corrosion systems can be selected, including 3PE coating, epoxy coating, and external anti-rust treatment according to application conditions.

5. What is the difference between SSAW and ERW steel pipe?

SSAW pipes are formed through spiral welding and are mainly used for large diameter applications, while ERW pipes are generally used for smaller diameter and lower-pressure applications.