保温(冷)管托的主要功能是将管道与管道支架隔离开来,以限制传热和热(冷)桥,并起到阻止水蒸气渗透的作用。
英国标准《BS 5970-2012:Thermal insulation of pipework, ductwork, associated equipment and other industrial installations in the temperature range of -100 °c to +870 °c – Code of practice(温度范围从- 100℃至+ 870℃的管道工程及设备隔热实施规程)》相对于旧版标准,对保温(冷)管道中的管托做了重大改变及明确说明。《BS 5970-2012》要求,支架上的保温(冷)管托材料应与管道的保温(冷)材料一致或兼容。
《BS 5970-2001》旧版以前建议允许使用木管托的内容被删除,新版《BS 5970-2012》改为明确说明:木管托不应被使用(“Wooden pipe supports should not be used”)。
究其原因,主要是木管托较差的保温隔热性能,容易造成热(冷)桥,产生冷凝水。另外木管托也难以形成水蒸气阻隔层。
《BS 5970-2012》新版:
《BS 5970-2001》旧版:
不能使用木管托,那应该使用什么管托呢?
后续文章,我会对上述三种管托进行一个比较分析。敬请关注。
What are the main types of insulated pipe supports?There are three main types of insulated pipe supports:1.Wood – this is the most traditional method of insulating pipe supports.
2.Phenolic – this has become the preferred method of insulating pipe supports.
3.Calcium silicate – this is mainly used in extremely high temperatures.
酚醛泡沫管托与木、硅酸钙管托的对比分析
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