最近十年国外在发展风管工程工业化方面进展较快,风管尺寸的定型系列化、风管结构、制作工艺、联接方法和组装等都有不少改进。下面介绍这方面的简况,供参考。一、重视风管尺寸的定型系列化 1976年7月1日苏联废除了1966年制订的金属风管定型系列化标准,改行新的标准,定型尺寸数目减少,更为通用化,如矩形风管包括13种边长尺寸,组合成56种断面 In the recent ten years, foreign countries have made rapid progress in the development of industrialization of air duct engineering. There have been many improvements in the stereotyped air duct size, air duct structure, manufacturing processes, connection methods, and assembly. The following is a brief introduction of this aspect for your reference. First, attach importance to the stereotypes of air ducts. On July 1, 1976, the Soviet Union abolished the serialization standards for metal air ducts established in 1966, and changed to new standards. The number of stereotypes was reduced, and the number of stereotypes was more generalized, such as rectangular air ducts. Including 13 side lengths, combined into 56 sections