Actualmente, Las tuberías se utilizan principalmente para el transporte de petróleo y gas de larga distancia. Las tuberías de acero de la tubería utilizadas en las tuberías de larga distancia incluyen tuberías de acero soldado de arco sumergido en espiral y tuberías de acero soldado de arco sumergido de doble lado de costura recta. Porque la tubería soldada de arco sumergido en espiral está hecha de acero de tira y su grosor de pared es limitado, La mejora del grado de acero está limitada por el tratamiento térmico del material.. Además, Hay algunas deficiencias insuperables de tubería soldada de arco sumergido en espiral, como una soldadura larga, Gran estrés residual y mala confiabilidad de la soldadura. With the increasing requirements for oil and gas transmission steel pipes, they are no longer used in densely populated areas and areas with high reliability requirements, and large-diameter straight welded pipes are gradually replacing spiral welded pipes.

1. Recently, China is speeding up the development of oil and gas in the East China Sea. With the development of oil exploitation to the depths of the ocean, the pipeline laying on the seabed is affected by the combined forces of pressure, impact force and bending force, and the phenomenon of flattening still appears, which is the weak link of spiral welded pipe. In order to improve the pipeline transportation capacity and ensure the submarine pipeline to develop towards thick wall, the submarine pipeline mostly adopts straight welded pipe. Therefore, compared with spiral welded pipe, straight welded pipe has higher dimensional accuracy and easier repair welding, so from this aspect, straight welded pipe is also the first choice.

2. Coal slurry and slurry pipeline need to use straight welded pipe, and the pipeline transportation is “pasty”. Pipeline transportation is the upward direction. Because the weld excess height of spiral welded pipe is spiral, which has great resistance to coal slurry, and the pipe needs a large wall thickness, it is inclined to adopt straight welded pipe.

3. Machinery, construcción, chemical industry and other industries need straight welded pipes. Actualmente, the inner hole of valve seat is machined after forging in mechanical industry, which is labor-consuming, time-consuming and material-consuming. If thick-walled straight seam welded pipe is used, it will be much more economical. Además, due to the requirements of mechanical properties of anti-flattening, only straight welded pipes are used for building pipes; Straight welded pipe is also expected to be used for chemical pipes.

The company’s products are mainly used for high-,medium-and low-pressure fluid transmission pipelines and structural steel pipes such as oil, gas natural, agua, vapor, gas, etc., and have undertaken landmark projects at home and abroad. The products are sold to various cities and exported to more than 80 regiones como el Sudeste Asiático, Middle East, Europa y America, and enjoy a high reputation in China.