一般冷水管道安裝在室外的較多，無論是民用管道還是工業管道安裝在室外時，不可忽略的問題就是防凍保溫，冬季是冷水管道凍結的高峰時期，尤其是溫度低于零度時，管道內介質就發生凍結而無法正常運輸。大家都知道，水的凝固點在零度，高于零度則還是水，低于零度則會凝結成冰，因此在給冷水管道保溫方面就需要采用電伴熱帶進行防凍。
電(dian)伴(ban)(ban)(ban)(ban)(ban)熱(re)帶(dai)分為(wei)自(zi)(zi)(zi)控(kong)溫電(dian)伴(ban)(ban)(ban)(ban)(ban)熱(re)帶(dai)和恒功(gong)率(lv)電(dian)伴(ban)(ban)(ban)(ban)(ban)熱(re)帶(dai)兩種。有(you)客(ke)戶(hu)咨詢說：“有(you)一(yi)(yi)款冷水管道需(xu)要(yao)保溫化(hua)冰(bing)，管道長(chang)(chang)度為(wei)2000米(mi)，只需(xu)維(wei)持管道內介質不發生凍(dong)結即(ji)可(ke)”。根據客(ke)戶(hu)描述的(de)(de)情(qing)況(kuang)，初始建議使(shi)(shi)(shi)用(yong)(yong)的(de)(de)是(shi)自(zi)(zi)(zi)控(kong)溫電(dian)伴(ban)(ban)(ban)(ban)(ban)熱(re)帶(dai)，而當客(ke)戶(hu)提(ti)出需(xu)要(yao)一(yi)(yi)千(qian)米(mi)一(yi)(yi)根電(dian)伴(ban)(ban)(ban)(ban)(ban)熱(re)帶(dai)時，自(zi)(zi)(zi)控(kong)溫電(dian)伴(ban)(ban)(ban)(ban)(ban)熱(re)帶(dai)將無(wu)(wu)法達到上述要(yao)求(qiu)，因自(zi)(zi)(zi)限溫電(dian)伴(ban)(ban)(ban)(ban)(ban)熱(re)帶(dai)較大(da)使(shi)(shi)(shi)用(yong)(yong)長(chang)(chang)度為(wei)100米(mi)，一(yi)(yi)千(qian)米(mi)一(yi)(yi)根則無(wu)(wu)法使(shi)(shi)(shi)用(yong)(yong)，因此又給客(ke)戶(hu)重新選擇使(shi)(shi)(shi)用(yong)(yong)了(le)恒功(gong)率(lv)電(dian)伴(ban)(ban)(ban)(ban)(ban)熱(re)帶(dai)，從(cong)而達到客(ke)戶(hu)所(suo)提(ti)的(de)(de)要(yao)求(qiu)。
因此當管道等設(she)備需要防凍保(bao)溫(wen)時，除(chu)了(le)需要知道設(she)備的(de)參數和現場環(huan)境外(wai)，還要了(le)解客(ke)戶的(de)要求，否則有(you)可能會選擇出(chu)客(ke)戶不(bu)需要的(de)型號，只有(you)這樣綜(zong)合考慮(lv)才能給出(chu)正確(que)的(de)保(bao)溫(wen)方案。
