NEWS

The straight seam electric welded steel pipe is a steel pipe whose weld seam is longitudinally parallel to the steel pipe. During the production process, it carries out cold rolling or hot rolling steel plate or strip coil welding, and then carries out straight seam welding on the welding equipment to form a straight seam welded pipe. The welding process of straight seam steel pipe is as follows: 1、Plate detection: ultrasonic inspection shall be carried out first after entering the production line to manufacture steel plates for large-diameter submerged arc welded straight seam steel pipes. 2、Milling: use the edge…

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The 2022 Qatar World Cup is in full swing. Many netizens ridiculed that apart from the Chinese football team not going to the World Cup, Chinese elements can be seen in every corner. Many people may not know that the Lusail Stadium, where the opening ceremony was held on November 20, was also designed and built by our country. The steel structure of Lusail Stadium uses about 30,000 tons. The steel structure is divided into 48 V-column trusses, 24 pressure ring trusses, and 48 curtain wall trusses. The steel structure weighing more than 20,000 tons is only supported by…

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At present, pipelines are mainly used for long-distance oil and gas transportation. Pipeline steel pipes used in long-distance pipelines mainly include spiral submerged arc welded steel pipes and straight seam double-sided submerged arc welded steel pipes. Because the spiral submerged arc welded pipe is made of strip steel and its wall thickness is limited, the improvement of steel grade is limited by the heat treatment of the material. In addition, there are some insurmountable shortcomings of spiral submerged arc welded pipe, such as long weld, large residual stress and poor reliability of weld. With the increasing requirements for oil…

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Pipeline transportation is a long-distance transportation mode of liquid and gas substances using pipeline as a means of transportation. It is a special mode of transportation that transports petroleum, coal and chemical products from the place of origin to the market, and it is a special component of trunk transportation in the unified transportation network. Sometimes, pneumatic pipes can do similar work, and compressed gas is used to transport solid tanks filled with goods. Pipeline transportation of petroleum products is more expensive than water transportation, but it is still cheaper than railway transportation. Most pipelines are used by their…

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Affected by various factors, it is expected that in 2023, China’s steel market demand will be strong internally and externally weak, the release pressure of steel production is still relatively large, and the price will continue to fluctuate in a wide range. There is no overwhelming unilateral tendency. It is estimated that there is a difference of about 1,000 RMB/Ton between the trough and the peak of the steel products price in the whole year, but the price center position may move up. According to data calculations, the national statistical output of crude steel in 2022 will drop by…

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