LSAW Carbon Steel Pipe 609.6*6.35

LSAW carbon steel pipe 609.6*6.35: Suitable choice for medium and large pipe diameters.

LSAW (longitudinal submerged arc welding) carbon steel pipe with 609.6*6.35 specification (outer diameter 609.6mm, wall thickness 6.35mm) is the main pipe for medium and large-scale fluid transportation scenes, which conforms to international and domestic standards such as API 5L and GB/T 9711, giving consideration to transportation efficiency, structural strength and economy, and is widely used in energy, municipal and other fields. Its advantages come from accurate size ratio and mature manufacturing technology, and it has become the preferred scheme for both flow and cost. This paper analyzes its core value with the subtitle of question sentence.

Size design: What is the adaptation logic of 609.6*6.35?

The outer diameter of 609.6mm (about 24 inches) is a medium and large pipe diameter, which can meet the demand of large-flow transportation, and the transportation efficiency is improved by more than 20% compared with the 508mm specification, and it is suitable for scenes such as centralized energy supply and long-distance transmission branch lines. The wall thickness of 6.35mm corresponds to the SCH5S series, which forms a scientific proportion with the outer diameter. It can not only resist the internal pressure within 10MPa, but also bear the soil load buried in the ground, and at the same time control the weight and cost of pipes to avoid the construction burden caused by large wall thickness.

Process guarantee: How can the quality of weld and structure reach the standard?

Using UOE/JCOE forming and double-sided submerged arc welding process, carbon steel plate is used as raw material, and the welding area is covered with flux 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%, the residual stress is eliminated, and the ultrasonic wave and water pressure detection are used to ensure that there are no pores and cracks, and the structural stability is far better than that of ordinary welded pipes.

Performance and scenario: What working conditions are required?

API 5L Gr.B/X42 carbon steel is mostly used, with yield strength ≥290MPa and good toughness, which can transport natural gas, crude oil, industrial water and other media. Mild corrosion scene can be matched with FBE coating to enhance protection, and it is suitable for underground and open-air laying, and is widely used in municipal heating pipe network, oil and gas gathering and transportation branch line, cooling water pipeline of power plant and other scenes.

Core advantages: What are the characteristics compared with similar pipes?

The stress distribution of straight seam structure is uniform, and its internal pressure resistance is better than that of spiral welded pipe. Compared with seamless steel pipe, the cost is reduced by more than 25%, and the mass production efficiency is higher. The diameter of 609.6mm gives consideration to both flow and construction convenience. In medium and large-scale transportation projects, the precise balance between performance and economy is realized, and the application cost performance is outstanding.