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There are several ways to heat up pipelines
Edit：Wuhu Heng Xin Cable Co., Ltd.
Date：2018-12-12
管道伴热有几种方式：伴管伴热或夹套管伴热。
伴热介质有：热水伴热、蒸汽伴热、电伴热等。
伴热方式的选用原则：
（1）输送介质的终端温度或环境温度接近或低于其凝固点的管道；介质凝固点低于50度时，宜选用伴管伴热；介质凝固点为50到100度时，宜选用夹套管伴热；介质凝固点高于100度时，应选用内管焊缝隐蔽型夹套管伴热。管道上的阀门、法兰、过滤器等应为夹套型。
（2）输送气体介质的露点高于环境温度需伴热的管道，宜选用伴管伴热；
（3）介质温度要求较低的工艺管道，输送介质温度或环境温度接近或低于其凝固点的管道，宜采用热水伴管伴热。
（4）液体介质凝固点低于40度的管道、气体介质露点高于环境温度且低于40度的管道及热敏性介质管道，宜采用热水伴管伴热。
（5）输送有毒介质且需夹套伴热的管道，应选用内管焊缝外露型夹套管伴热。
（6）经常处于重力自流或停滞状态的易凝介质管道，宜选用夹套管伴热或带导热胶泥的蒸汽伴管伴热。
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