LSAW Carbon Steel Pipe 914.4*7.92

1. Specification design: What is the adaptation logic of 914.4*7.92?

The outer diameter of 914.4mm (about 36 inches) is a large pipe diameter, which improves the conveying efficiency by more than 30% compared with the 762mm specification, and can meet the requirements of medium conveying of millions of cubic meters. The wall thickness of 7.92mm corresponds to SCH80 series, which can resist the internal pressure of 15MPa, adapt to medium and high pressure conditions, control the pipe body weight and construction difficulty, avoid the cost redundancy caused by large wall thickness, and adapt to long-distance underground and open-air laying.

2. Process guarantee: How to ensure the quality of large-diameter structures?

Using UOE precision forming and double-sided submerged arc welding technology, high-quality carbon steel plate is used as raw material, and the flux is isolated from air to reduce defects, and the weld strength reaches more than 95% of the base metal. After forming, the diameter is enlarged, and the tolerance of outer diameter is controlled within 0.5%. Residual stress is eliminated, and problems such as cracks and blowholes are eliminated with ultrasonic and water pressure double detection, thus ensuring the stability of large-diameter structures.

3. Core application: What major engineering scenarios are suitable for?

It mainly focuses on the branch lines of long-distance oil and gas transmission trunk lines, central heating pipe networks in megacities and gathering and transportation systems in large chemical parks. In the oil and gas field, adapt to the regional centralized gas supply demand; Municipal scene can cover a large area of heating, reducing the laying density of pipe network; Industrial scene can withstand low corrosive medium and pressure impact, and ensure stable production and transportation.

4. Competitive advantage: What are the characteristics compared with similar pipes?

The stress distribution of straight seam structure is uniform, and its ability to resist internal pressure and soil stress is better than that of spiral welded pipe. Compared with seamless steel pipe, the cost is reduced by more than 35%, and the mass production efficiency is higher. Large pipe diameter is suitable for large-scale transportation, and FBE coating can improve corrosion resistance and achieve a precise balance between performance and economy in large-scale transportation projects.