聚氨酯直埋保温管由输送介质的工作钢管、聚氨酯保温层和聚乙烯塑料外保护管依次与设备结合而成。那关于聚氨酯直埋保温管施工时的注意事项有哪些呢?一般哪些因素会聚氨酯直埋保温管的使用寿命呢?
一、聚氨酯直埋保温管施工时要注意的事项
1.供热管道的铺设方式分为弥补直埋和无补偿直埋。在设计和施工中,要准确掌握这两种铺设方式的特点、工作原理和应用,确保施工安全可靠。
2.进场后,仔细检查聚氨酯直埋保温管。施工前,为了确保安全,不要使用不合格的聚氨酯直埋保温管。为保证施工质量,必须认真施工。工程质量和管道使用寿命由施工质量决定。
4.工程验收时一定要仔细检查,因为聚氨酯直埋保温管埋在地下,属于隐蔽工程。如果验收不仔细,会影响以后的使用。
6.接头和回填土应在管道中试压。这项工作只有在竣工测量和清洗后才能进行,必须根据聚氨酯直埋保温管的施工特点回填规定厚度的砂,不得偷工减料。
7.现场的接头保温只有通过试压后才能进行。本项目的工作内容是直接影响其使用寿命。保温层有两种方法:现场发泡施工和保温瓦施工。无论采用哪种施工方法,都不能出现环形空间、开裂和脱层,必须保证接头的密封性和防水性。这个要非常重视。
二、影响聚氨酯直埋保温管使用寿命的因素
保温管偏心。简单来说,预制保温管的保温层与钢管不同,导致预制保温管厚度不均匀。如果这种情况严重,外层塑料可以软化并损坏。从而降低使用寿命。
保温管使用不当造成的损坏,在运输和装置过程中容易损坏,因此如果在包装运输过程中没有得到很好的保护,其使用寿命可能会缩短。或在聚氨酯直埋保温管埋地后,由于距地面深度不好,或上部土壤和道路较软,经载重车辆碾压后损坏。这种情况也不是没有,所以在聚氨酯直埋保温管的施工中,必须合理设计所有工程,以保证良好的使用效果。
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