20 Inch Large Diameter Spiral Welded Carbon Steel Pipe
20 Inch Large Diameter Spiral Welded Carbon Steel Pipe
20 Inch Large Diameter Spiral Welded Carbon Steel Pipe is manufactured by forming steel strip into a spiral shape and welding the seam. It is commonly used in water transmission, industrial piping, and infrastructure projects. The pipe is available in different wall thicknesses and lengths, with surface treatments and end finishes selected according to project specifications and application requirements.
- Mill Test Certificate Provided
- Strict Quality Inspection
- Custom Sizes Available
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20 Inch Large Diameter Spiral Welded Carbon Steel Pipe is manufactured by forming steel strip into a spiral shape and welding the seam along the pipe body. It is commonly used in water transmission, industrial fluid transportation, and infrastructure projects requiring large-diameter steel pipes. The 20-inch nominal size has a standard outside diameter of 508 mm, while wall thickness is selected according to the required specification and operating conditions. The pipe can be supplied in different lengths with plain or beveled ends. Surface options include black, painted, or other protective coatings depending on the service environment. Material grades, inspection requirements, and coating specifications can be discussed according to project needs.
Key Features
- 20-Inch Nominal Size: Suitable for large-diameter piping systems used in water transmission and industrial projects.
- Spiral Welded Construction: Manufactured by forming steel strip into a spiral and welding the seam along the pipe body.
- Carbon Steel Material: Provides practical strength and weldability for common pipeline applications.
- Selectable Wall Thickness: Available in different thicknesses according to project specifications and operating conditions.
- Flexible Length and End Options: Supplied in required lengths with plain or beveled ends to suit installation needs.
- Surface Treatment Options: Black pipe and specified protective coatings can be considered according to the service environment.

20 Inch Large Diameter Spiral Welded Carbon Steel Pipe Specifications
| Item | Available Range |
|---|---|
| Product | 20 Inch Large Diameter Spiral Welded Carbon Steel Pipe |
| Material | Carbon Steel |
| Nominal Size | 20 Inch / DN500 |
| Outside Diameter | 508 mm / 20 Inch |
| Manufacturing Process | Spiral Submerged Arc Welding (SSAW) |
| Wall Thickness | Available in Different Thicknesses / Customized |
| Standard | API 5L / ASTM A252 / Applicable Project Standards |
| Steel Grade | According to Required Standard and Project Specifications |
| Length | 6 m / 12 m / Customized |
| End Type | Plain End / Beveled End / Customized |
| Surface Treatment | Black / Painted / Epoxy Coated / 3LPE Coated |
| Application | Water Transmission / Industrial Pipelines / Infrastructure Projects |
| Customization | Wall Thickness / Length / Steel Grade / Coating / Quantity |
Applications
Used in municipal water transmission pipelines for transporting large volumes of water over long distances.
Suitable for industrial water supply and circulation systems in factories and production facilities.
Used in wastewater treatment plants for conveying wastewater and process water.
Applied in irrigation projects for distributing water across agricultural areas.
Used in industrial infrastructure for transporting compatible fluids through large-diameter pipelines.
Suitable for construction projects involving underground pipeline networks and water distribution systems.
Frequently Asked Questions About 20 Inch Large Diameter Spiral Welded Carbon Steel Pipe
1. What is a 20 Inch Spiral Welded Carbon Steel Pipe?
It is a large-diameter carbon steel pipe made by forming steel strip into a spiral shape and welding the seam along the pipe body.
2. What is the outside diameter of a 20-inch spiral welded pipe?
The nominal outside diameter is typically 508 mm (20 inches), while the wall thickness depends on the required specification.
3. What are the common applications of this pipe?
It is commonly used in municipal water transmission, industrial water supply, irrigation systems, wastewater treatment, and infrastructure projects.
4. What wall thicknesses are available?
Different wall thicknesses can be supplied according to the applicable standard, design requirements, and operating conditions.
5. What lengths can you supply?
Common lengths include 6 m and 12 m, with customized lengths available depending on production capabilities and order requirements.
6. Can the pipe be supplied with protective coatings?
Yes, surface options may include black, painted, epoxy-coated, or 3LPE-coated finishes, depending on the intended application and project specifications.









