The most popular pipe fittings produced by Shougan

2022-07-14
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The pipe fitting products produced by Shougang and Shouqin company have been applied to the national key project

Shougang Technology Research Institute and Shouqin company have successfully developed wphy-80/70/60 series pipe fitting steel with large wall thickness in accordance with the long-term dependence on import of steel for supporting pipe fittings for oil and gas pipelines in China and in close combination with the needs of users, It has been successfully applied in China's west gas

Shougang Technology Research Institute and Shouqin company. According to the fact that China's oil and gas file is used to repair the strained local pipe fittings on the sliding surface, and in close combination with the needs of users, it has carried out technical research, successfully developed wphy-80/70/60 series pipe fittings with large wall thickness, and the pipe fittings produced by it have replaced imports, and have been successfully applied to the second line of the west east gas transmission project in China Third line and other key components of national key projects. Up to now, 30000 tons of commercial supplies have been realized, the maximum wall thickness has reached 62mm, the direct economic benefit has reached 10.823 million yuan, and the market share has reached 35%, ranking first in China

supporting pipe fittings are mainly used for the branch, collection, diameter change, direction change and other key links of oil and gas transmission pipelines. In China, the x80/x70 long-distance pipelines for oil and gas pipelines have been localized and go abroad. However, a series of steel for supporting pipe fittings have been imported for a long time. These supporting pipe fittings have high import prices, long ordering cycles and many restrictive factors, and often can not meet the needs of engineering construction. According to the demand of wphy-80/70/60 fittings for oil and gas transmission pipelines in China, a large number of industrial trial production and basic research have been carried out in China, but the effect is not obvious

in order to meet the needs of customers, the wide and heavy plate Institute of Shougang Technology Research Institute has closely followed users for a long time, timely collected user feedback, and carried out in-depth basic research on steel welding and heat treatment for pipe fittings, so as to continuously improve product quality. Aiming at the characteristics of large wall thickness (25~62mm), many specifications, peculiar pipe shape, complex manufacturing process and low service temperature of steel for supporting pipe fittings, the technology research institute has made full use of its advantages in welding, successfully developed wphy-80/70/60 series steel for pipe fittings with large wall thickness, and achieved a series of technological innovations. The main performance is that the unique composition system and welding process of steel for large wall thickness pipe fittings have been developed to provide users with advanced welding process services. The product can withstand the welding heat input of 70kj/cm line energy. The strength adjustment of the welded joint is good, and the position, toughness and hardness indicators fully meet the technical requirements. It is evaluated by users as a steel plate with high heat input welding adaptability; According to the problems of deformation, cracking and delamination in the process of pipe fitting manufacturing and forming reflected by users, the differential temperature rolling process and surface hardening technology of steel for large wall thickness pipe fittings have been developed to promote the penetration of rolling deformation into the center, and improve the uniformity of microstructure and the toughness of the center of the steel plate. In the face of customized fiber difficulties such as difficult production technology, the design and R & D personnel of the technical research institute and relevant technicians of downstream users have repeatedly debugged around the clock and developed the quenching and tempering heat treatment process technology for steel for large wall thickness pipe fittings, which provides strong technical support for users and ensures that the base metal strength, weld and heat affected zone toughness of the finished pipe fittings are greater than or equal to 100J at minus 40 ℃, It effectively solves the problem of high-pressure brittle fracture of pipe fittings in low-temperature service environment

at present, the maximum thickness of steel used for pipe fittings of Shougang has reached 62mm, which is the maximum thickness of steel used for pipe fittings of the same level at home and abroad. Shougang's cooperative users include all high-end users in the pipe fitting manufacturing industry, including Bohai Petroleum equipment pipe fitting company and PetroChina Pipeline machinery manufacturing company, as well as many leading state-owned and private pipe fitting manufacturing enterprises, and have been unanimously recognized by users

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