LSAW Carbon Steel Pipe 660*6.92

LSAW carbon steel pipe 660*6.92:

High-efficiency adaptive pipe for medium and large transportation.

LSAW (longitudinal submerged arc welding) carbon steel pipe with 660*6.92 specification (outer diameter 660mm, wall thickness 6.92mm) is a high-quality pipe for medium and large-scale fluid transportation scenes. It is produced in strict accordance with API 5L, GB/T 9711 and other standards, giving consideration to transportation efficiency, structural strength and economy, and is widely used in energy and municipal engineering. Its advantages come from scientific size ratio and mature technology, and it has become the best choice for both performance and cost in high-flow scenarios. This paper analyzes its core value with the subtitle of question sentence.

1. Size design: What is the adaptation logic of 660*6.92?

The outer diameter of 660mm is a medium and large pipe diameter, which improves the transportation efficiency by more than 10% compared with the specification of 609.6mm, and is suitable for large flow requirements such as central heating and long-distance oil and gas branch lines. The wall thickness of 6.92mm corresponds to the SCH6S series, which forms a reasonable proportion with the outer diameter, can resist the internal pressure within 12MPa, bear the buried soil load at the same time, give consideration to self-weight control and construction convenience, and avoid redundant costs.

2. Process guarantee: How to ensure the quality of structure and weld?

Using UOE/JCOE forming and double-sided submerged arc welding technology, high-quality carbon steel plate is used as raw material, and the flux is isolated from the air to reduce defects, and the weld strength reaches more than 95% of the base metal. After forming, the outside diameter tolerance is controlled within 0.5%, and residual stress is eliminated. With ultrasonic flaw detection and water pressure test, no air holes and cracks are ensured, and the structural stability is excellent.