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预制直埋聚氨酯保温管接口工艺介绍
保温方式
钢管保温方式多种多样,多用于城市热输送管道及各种炼化工艺管道,总结
常用的聚氨酯保温管接头方法主要有以下几种:
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预制直埋聚氨酯保温管接口聚乙烯胶粘带补口
先涂刷与胶粘带配套的底漆,然后缠绕聚乙烯胶粘带作为防腐层,外保护层
采用聚氯乙烯或聚乙烯外缠带。其优点是施工速度快,不需加热,操作简单;缺点为粘结力较差,防水性能低,受施工环境影响,强度低。
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聚乙烯热收缩套(带)补口
聚乙烯热收缩套(带) 包覆在补口处,均匀加热使其产生径向收
缩,内层胶熔化,紧密地与管体防腐层和补口钢管表面粘接在起。优点是密封性强、粘结力好、施工方便、无环境污染;缺点为受雨雪、风沙天气影响大,对操作工的责任心、熟练程度要求高。
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聚乙烯夹克管皮补口
方法将聚乙烯夹克管皮 包覆在补口处,两端用热收缩带密封,均匀加热使其产生径向收缩,内层胶熔化,紧密地与管体防腐层和补口钢管表面粘接在起。
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聚氨酯直埋式热水保温管 的应用:
直埋热水保温管适合输送在-50℃—120℃
范围内的各种介质的保温保冷工程。它广泛应用于城市集中供热、暖室、冷库、煤矿、石油管道港口、化工、天然气管道、电力直埋、空调管道保温、电缆穿线管、蒸汽保温管道等行业的保温保冷工程。
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