Wuhu Hengxin Cable Co., Ltd
Contact:Mr Dai
Phone: 13955309088
Address: 13955309088@163.com
Address: Jiuhua North Road Electrical Components Industrial Park, Wuhu City, Anhui Province
A Brief Discussion on the Correct Use of Heat Tracing Cables
注意事项
1) 伴热电缆安装时,不要在地面上拖拉,以免被锋锐物损坏。不要与高温物体接触,防止电焊熔渣溅落到伴热电缆上。
2) 伴热电缆有良好的柔性,但不允许硬折,需要弯曲时,弯曲半径不得小于伴热电缆厚度的6倍。
3) 伴热电缆严禁用重物硬砸,如被砸 伴热电缆应重新进行电气测试,合格后才能使用。
4) 伴热电缆应与被伴热管道(或设备)贴紧并固定,以提高伴热效率。固定伴热电缆时应用专用尼龙扎带,严禁用金属丝绑扎。
5)非金属管道应在管外壁与伴热电缆之间贴一层铝胶带,用来增大接触传热面积。
6) 伴热电缆的安装要充分考虑管道附件(或设备)的拆卸可能性,且伴热电缆又不需要被切断。电缆被剪断或接头时要注意接头的密封。
7) 每米管道热损失大于每米伴热电缆输出功率时,可按图4敷设伴热电缆,以利维修时拆卸。
8)法兰处易产生泄漏,缠绕伴热电缆时,应避开其正下方,如图5所示。
9) 伴热电缆在管道上的安装方法与固定,可按图6进行。扎带材料应根据管道的温度选用。
10) 伴热系统安装完毕后,必须逐个回路进行电气测试合格后,再进行通电试验,检查伴热电缆发热情况。确认正常后,才允许保温。
11) 保温材料应干燥。潮湿的保温材料不但影响伴热效果,还会导至对伴热电缆的腐蚀,缩短使用寿命,未包外保护层的保温管道,被雨雪浇湿后,应风干后再施工外保护层。
12) 伴热系统施工完毕,应在管道的外保护层,做出明显的电伴热标记,以提醒人们注意。
13) 伴热电缆安装时,当电缆一端接入电源前应将母线另一端用配套的封头套封好,两条母线不得短路。
14) 多回路伴热电缆从同一接线盒接出时,各母线都要有绝缘套隔离,以防短路。
15) 接线盒应密封,防止雨水进入。
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