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
Briefly introduce the selection of explosion-proof electric heating belts
在选择电热带产品时，应综合考虑各种因素，如适用性、经济性、供电条件等，具体方法如下：
根据管道维持温度及偶然性的较高操作温度选定电热带的耐温等级和发热等级。
根据管道可能经受的较高温度来选择相应较高暴露温度的电热带，确定管道是否会出现偶发性升温(如蒸汽、热水、热油清扫管道)及较高温度，所选电热带的较高暴露温度应不低于偶发性温升。如偶发性温升高于较高暴露温度，可在进行热工估算后，调整安装方法，即在电热带与管道之间加一层适当厚度的保温层，以缓解偶发温升对电热带的影响。
根据功率—温度曲线选择电热带功率
选择电热带的输出功率，不是以标称功率为依据，而是以系统维持温度时电热带须输出的功率为依据。
选择电热带的温度等级及伴热功率与系统所需的维持温度有直接关系，应选用较高表面温度高于系统维持温度（例如20℃）并能补偿体系热损失的电热带。
单一电源较大电热带的确定
从同一个电源接线盒引出的所有各段伴热电缆的长度之和，称为单一电源较大伴热电缆长度。据此选择过流保护开关的容量。根据管道分布及支线长短选用电热带，低功率电热带单根使用长度较大，适合较长的支线使用，若一根的功率不够可用多根。
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