Large Diameter Spiral Welded Steel Pipe Overview

Large-diameter spiral steel pipe is a general term, generally referring to spiral steel pipes with a diameter greater than 1 meter. Spiral steel pipes are made of steel strips that are bent and then welded. Steel pipes need to undergo hydraulic pressure, bending, flattening and other experiments, and have certain requirements for surface quality.

Commonly used standards for spiral steel pipes are generally divided into SY/T5037-2000 (Ministry standard, also called spiral submerged arc welded steel pipe for ordinary fluid transportation pipelines), GB/T9711.1-1997 (National standard, also called oil and gas industry transportation steel pipe The first part of the delivery technical conditions: Grade A steel pipe (the strict requirements include GB/T9711.2 Grade B steel pipe), API-5L (American Petroleum Institute, also called pipeline steel pipe; divided into two levels: PSL1 and PSL2), SY/T5040-92 (spiral submerged arc welded steel pipe for piles).

Industry Spiral Welded Steel Pipe Applications

• Drinking water and sewer pipelines
• Oil and natural gas pipelines
• Dock, bridge, and pier foundations
• Ground reinforcement and bored piling
• Agricultural irrigation and drainage

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