Welded steel pipe standard length

Straight Seam Welded Pipes
The standard length requirements for welded pipes vary based on the type of pipe. For straight seam welded pipes, commonly referred to as ERW (Electric Resistance Welded) or LSAW (Longitudinal Submerged Arc Welded) pipes, the length typically does not exceed 12000mm. This standard is designed to facilitate the production, storage, and quality control of the pipes. Additionally, the length of these pipes is often measured using laser scanning technology or manual measurement techniques.

Spiral Welded Pipes
Spiral welded pipes, which are widely used in industries such as petroleum, natural gas, chemical processing, and water supply, have a slightly different standard. According to international and national standards, the length of spiral welded pipes should not exceed 16000mm. Similar to straight seam pipes, this length requirement ensures ease of production and storage while maintaining the quality of the pipes. Advanced testing methods, including laser scanners and CNC production lines, are commonly used to measure and verify the length of these pipes.

Common Specifications and Applications

Pipes with Diameters Less Than 76mm: These are typically used in steel structures, machinery manufacturing, automotive production, and steel furniture.

Pipes with Diameters Between 76mm and 159mm: These pipes are often used for general manufacturing purposes, transportation pipelines, and foundation piles.

Pipes with Diameters Greater Than 159mm: These larger pipes are generally used in oil and gas transportation, underground pipelines, bridge construction, and similar applications.

Thinner-Walled Pipes: Used primarily for wiring tubes.

Thicker-Walled Pipes: Suitable for applications such as motorcycle frames, cold drawing, deep drawing, and other heavy-duty machinery manufacturing.

Summary
The maximum length requirements for straight seam and spiral welded pipes are set at 12000mm and 16000mm, respectively. These standards are established to facilitate the efficient production and storage of welded pipes while ensuring their quality meets national standards. In practice, using advanced testing equipment like laser scanners, manual measurement, and CNC systems helps maintain the quality and safety of these welded pipes.