Spiral Welded Steel Pipe with Large Diameter

Spiral Welded Steel Pipe with Large Diameter are suitable for pipeline systems where large flow capacity, structural strength, and dimensional flexibility are required. Material options include carbon steel, alloy steel, stainless steel, and corrosion-resistant steel. Surface treatments such as galvanizing and anti-corrosion coatings can be selected according to the conveyed medium and service environment.

Product Features

Large Diameter Range: Pipe outer diameters from 219 mm to 3500 mm support large-volume fluid transportation and large-scale pipeline construction.

Flexible Wall Thickness: Wall thicknesses from 3 mm to 50 mm can be selected according to pressure, structural load, installation conditions, and project specifications.

Spiral Welded Construction: The steel strip or plate is formed into a cylindrical shape along a spiral path and joined by a continuous helical weld. This production method is suitable for manufacturing large-diameter pipes from standard-width steel material.

Multiple Material Options: Carbon steel, alloy steel, stainless steel, and corrosion-resistant steel can be selected according to mechanical requirements and the properties of the transported medium.

Surface Protection: Galvanizing, spraying, and anti-corrosion coating options are available for applications requiring additional protection against moisture, chemicals, soil, or other corrosive conditions.

Length Flexibility: Standard lengths are 6 m and 12 m. Other lengths can be discussed according to transportation, installation, and project requirements.

Technical Specifications

Materials and Surface Treatment

The material should be selected according to the mechanical load, transported medium, temperature, pressure, and corrosion conditions of the pipeline system.

Carbon steel is suitable for general structural and fluid transportation applications where standard strength and weldability are required. Alloy steel can be selected when additional mechanical or temperature-related performance is required. Stainless steel is used where higher corrosion resistance is needed. Corrosion-resistant steel can be considered for pipeline systems exposed to aggressive service environments.

Surface treatment can be selected based on installation and operating conditions. Galvanizing provides a zinc-based protective layer, while spraying and anti-corrosion coatings can provide additional protection for pipes used in outdoor, underground, water-related, or chemically exposed environments.

How Spiral Welded Steel Pipe Is Manufactured

Spiral Welded Steel Pipe with Large Diameter is manufactured through a continuous forming and welding process. Steel strip or plate is prepared according to the required material and dimensions, then formed into a cylindrical shape along a controlled spiral angle. The edges are joined through spiral seam welding to create the pipe body.

After welding, the pipe is inspected for dimensional accuracy, weld quality, surface condition, and other specified requirements. Additional operations such as cutting, beveling, and surface treatment can be performed according to the final application and installation requirements.

Compared with straight-seam production, spiral forming allows large-diameter pipes to be produced from available steel strip or plate widths while maintaining flexibility in pipe diameter and wall thickness. The final pipe configuration should be selected according to the applicable design standard and project requirements.

Applications

Water Transmission: Large-diameter spiral welded steel pipes are used for water supply pipelines, water diversion systems, drainage systems, and large-scale water infrastructure where high flow capacity is required.

Oil and Gas Transportation: They can be used in pipeline systems for transporting oil, natural gas, and other fluids. Material grade, wall thickness, weld requirements, coating, and pressure design should be determined according to the pipeline specification.

Chemical Industry: Pipes can be used for conveying chemical liquids and gases when the selected steel grade and protective treatment are compatible with the transported medium.

Mining: Large-diameter pipes can be used for transporting water, slurry, mud, and other process media in mining and mineral-processing facilities.

Municipal Infrastructure: Applications include water supply, drainage, utility infrastructure, and pipeline systems associated with roads, bridges, tunnels, and other public works.

Quality Control

Quality control for spiral welded steel pipes focuses on the raw material, forming dimensions, weld integrity, pipe geometry, surface condition, and final inspection.

• Raw material is checked against the specified steel grade and material requirements.
• Pipe outer diameter and wall thickness are measured to verify dimensional requirements.
• Spiral weld seams are inspected according to the applicable quality requirements.
• Ultrasonic or other non-destructive testing methods can be applied when required by the product specification.
• Surface condition is checked before galvanizing, coating, or other finishing processes.
• Finished pipes are inspected for length, appearance, dimensions, and specified technical requirements before shipment.

Customization and Processing Options

Spiral Welded Steel Pipe with Large Diameter can be configured according to the requirements of different pipeline projects. Available options include material grade, outer diameter, wall thickness, pipe length, surface treatment, cutting, beveling, and anti-corrosion treatment.

For project-specific orders, key information such as the transported medium, design pressure, operating temperature, pipe diameter, wall thickness, installation environment, applicable standard, and coating requirements should be provided before production. This allows the pipe specification to be matched with the actual working conditions rather than selected only by diameter.

Why Choose Shunchen?

Experienced Steel Industry Manufacturer: Established in 2014, Tianjin Shunchen has developed from a steel trading company into an integrated industrial group covering steel processing, galvanizing, anti-corrosion treatment, logistics, and international trade. With over 300 employees and years of experience in steel manufacturing and supply, Shunchen understands the requirements of different engineering and industrial applications.

Integrated Production and Processing Capabilities: Shunchen operates multiple production facilities, including three hot-dip galvanizing lines, one steel structure production line, and two anti-corrosion spraying lines. With more than 40,000 square meters of production and warehousing space, the company provides steel products with integrated processing options, including surface treatment and customized fabrication.

Stable Production Capacity: Annual production capacity exceeds 450,000 tons, supporting continuous supply for large-scale construction projects, infrastructure applications, and industrial customers. The combination of manufacturing capability and inventory management helps improve supply efficiency for different order requirements.

Quality Management System: Shunchen obtained ISO 9001 quality management system certification in 2018 and applies standardized quality control procedures throughout production. Raw materials, processing steps, product dimensions, surface treatment, and finished products are inspected according to applicable requirements.

Customized Steel Solutions: Based on different project conditions, Shunchen provides customized options for product specifications, processing methods, surface protection, and delivery requirements. Customers can select suitable solutions according to application environment, structural requirements, and installation conditions.

Long-Term Industrial Development: In 2024, Shunchen's annual output value reached nearly 2 billion yuan, reflecting its expanded capabilities from steel supply to comprehensive industrial manufacturing services. The company continues to develop solutions for traditional steel applications and emerging fields such as photovoltaic support structures.

Installation and After-Sales Support

Installation should be carried out according to the pipeline design, applicable welding procedures, and relevant installation standards. Professional welding personnel should be used for field connections, and completed joints should be inspected according to the project requirements.

Before commissioning, the pipeline should be checked for connection quality, leakage, dimensional conformity, and surface or coating damage. Regular inspection and maintenance should be performed according to the operating environment and pipeline service conditions.

Shunchen provides technical support for product selection, dimensional requirements, surface treatment, and installation-related questions. For project orders, technical requirements can be reviewed before production to reduce specification mismatches during installation.

FAQ

What is a large-diameter spiral welded steel pipe?

A Spiral Welded Steel Pipe with Large Diameter is a steel pipe manufactured by forming steel strip or plate into a cylindrical shape along a spiral path and welding the helical seam. It is commonly used for large-diameter pipeline systems where substantial fluid flow capacity is required.

What diameters are available?

Shunchen's stated diameter range is 219 mm to 3500 mm. The suitable diameter depends on flow requirements, design conditions, installation constraints, and the applicable pipeline specification.

What wall thicknesses are available?

Wall thicknesses range from 3 mm to 50 mm. The required thickness should be determined according to design pressure, mechanical loads, corrosion allowance, material grade, and applicable standards.

What materials can be used?

Available material categories include carbon steel, alloy steel, stainless steel, and corrosion-resistant steel. The appropriate grade depends on the working environment and transported medium.

Can the pipe length be customized?

Yes. Standard lengths are 6 m and 12 m, while other lengths can be discussed according to project requirements, transportation conditions, and installation requirements.

What surface treatments are available?

Surface treatment options include galvanizing, spraying, and anti-corrosion coatings. The appropriate treatment depends on whether the pipe is used above ground, underground, in water-related applications, or in a corrosive environment.

What industries use large-diameter spiral welded steel pipes?

Common applications include water transmission, oil and gas transportation, chemical processing, mining, drainage, and municipal infrastructure projects.

How should the pipe specification be selected?

Selection should consider the transported medium, required flow rate, design pressure, operating temperature, corrosion conditions, installation environment, material grade, outer diameter, wall thickness, and applicable standards. Providing these parameters before quotation helps determine a suitable pipe specification.