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在锅炉制造中正确选用和使用材料是一件十分重要的工作,这样既可以避免以优代劣造成不必要的浪费;又可以避免以劣代优而造成隐患。目前在S145·8钢管与20~#管的代用或等同使甩问题上,实际就属于如何正确使用材料方面的一个重要问题。在西德DIN17175-79中st45·8锅炉钢管有两个等级,即st45·8/I管和st45·8/Ⅲ管。这两种钢管等级分别相当于我国的GB3087-82中的20~#低中压锅炉无缝管和GB5310-
The correct selection and use of materials in the manufacture of boilers is a very important task, so as to avoid unnecessary waste due to superiority and inferiority, and to avoid hidden dangers caused by inferior superiority. Currently in the S145.8 steel pipe and 20 ~ # pipe substitution or equivalent to make the problem, the actual belongs to how to correctly use the material an important issue. In West Germany DIN17175-79 st45 · 8 boiler steel pipe has two levels, namely st45 · 8 / I pipe and st45 · 8 / Ⅲ pipe. These two kinds of pipe grades are equivalent to China’s GB3087-82 20 ~ # low pressure boiler seamless pipe and GB5310-