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钢管在国民经济中起着重要的作用,既能用于输送流体物质;又可作为结构材料用于建筑、桥梁、机械制造等部门。随着国民经济各部门的发展,对钢管的产量、品种、质量提出了新的要求。特别是石油、化工、管道建筑工程,以及各新技术部门,需要各种特殊性能的管材作为结构材料,这就大大促进了钢管工业的发展。近年来,世界钢管年产量平均增长6％,约占钢材总产量的10％左右,其增
Steel pipe in the national economy plays an important role, both for the transport of fluid substances; but also as a structural material used in buildings, bridges, machinery manufacturing and other departments. With the development of various departments in the national economy, new demands have been put on the output, variety and quality of steel pipes. In particular, the petroleum, chemical, pipeline construction, and various new technical departments require a variety of special properties of the pipe as a structural material, which greatly promoted the development of the steel pipe industry. In recent years, the annual output of the world’s steel pipe increased by an average of 6%, accounting for about 10% of the total steel output, which increased