聚氨酯保溫管在安裝后(hou)投入使用，還要(yao)時(shi)刻注(zhu)意后(hou)期的(de)維護工作，主要(yao)從排水和放氣兩方面入手(shou)，需要(yao)特別注(zhu)意。

 第一、對(dui)溫(wen)度(du)要(yao)求較(jiao)高(gao)(gao)的用(yong)(yong)戶(hu)，可以從(cong)主管(guan)道的上部或者側面(mian)接出支管(guan)，防止水(shui)流凝(ning)結。 第二、當聚氨酯直(zhi)(zhi)埋保溫(wen)管(guan)在(zai)運(yun)行時會產生凝(ning)結水(shui)，所(suo)以需要(yao)用(yong)(yong)排(pai)(pai)(pai)水(shui)裝置(zhi)將凝(ning)結水(shui)排(pai)(pai)(pai)除，但是(shi)由于運(yun)行初期管(guan)內溫(wen)度(du)較(jiao)低，積(ji)累的凝(ning)結水(shui)較(jiao)多，用(yong)(yong)疏水(shui)裝置(zhi)很難排(pai)(pai)(pai)除干凈，所(suo)以需要(yao)啟動硫(liu)水(shui)裝置(zhi)，每隔100米到150米之間設置(zhi)一個(ge)。 第三、此外還要(yao)設有排(pai)(pai)(pai)水(shui)閥(fa)，設計在(zai)最(zui)低點(dian)，放氣(qi)閥(fa)設置(zhi)在(zai)最(zui)高(gao)(gao)點(dian)，通常使用(yong)(yong)DNI5、20毫米的截至閥(fa)。第四、如果(guo)管(guan)道輸(shu)送(song)熱水(shui)，應該在(zai)補(bu)償器的最(zui)高(gao)(gao)點(dian)加(jia)上放氣(qi)閥(fa)，預(yu)制(zhi)直(zhi)(zhi)埋保溫(wen)管(guan)最(zui)低點(dian)加(jia)上泄水(shui)閥(fa)，另外注意補(bu)償器在(zai)安裝時一定要(yao)垂直(zhi)(zhi)放置(zhi)。

    聚氨(an)酯(zhi)管(guan)(guan)(guan)在(zai)供暖、燃氣輸送(song)上發揮了很大的(de)(de)(de)作(zuo)(zuo)用(yong)，但(dan)是如(ru)(ru)果使用(yong)維護不(bu)(bu)(bu)(bu)當的(de)(de)(de)話并不(bu)(bu)(bu)(bu)能達到應(ying)有(you)的(de)(de)(de)效果，以(yi)上就是對(dui)聚氨(an)酯(zhi)管(guan)(guan)(guan)的(de)(de)(de)維護工(gong)(gong)(gong)(gong)作(zuo)(zuo)做(zuo)的(de)(de)(de)總結。1、一定要真(zhen)正理解供熱(re)管(guan)(guan)(guan)道(dao)直(zhi)(zhi)埋(mai)敷設方(fang)式分(fen)為有(you)彌(mi)補(bu)(bu)直(zhi)(zhi)埋(mai)敷設及無(wu)補(bu)(bu)償(chang)直(zhi)(zhi)埋(mai)敷設兩種方(fang)式，設計和(he)施(shi)(shi)工(gong)(gong)(gong)(gong)中。確實掌握兩種方(fang)式各(ge)自(zi)的(de)(de)(de)工(gong)(gong)(gong)(gong)作(zuo)(zuo)原理，特點及其應(ying)用(yong)場(chang)所，以(yi)便(bian)在(zai)設計上合(he)理選(xuan)用(yong)，施(shi)(shi)工(gong)(gong)(gong)(gong)上安全、可靠、經濟(ji)。2、進場(chang)后(hou)認真(zhen)進行檢驗，施(shi)(shi)工(gong)(gong)(gong)(gong)前必(bi)需(xu)(xu)對(dui)生產的(de)(de)(de)廠(chang)家(jia)進行調研。對(dui)不(bu)(bu)(bu)(bu)合(he)格的(de)(de)(de)保(bao)(bao)溫管(guan)(guan)(guan)拒(ju)絕使用(yong)。3、聚氨(an)酯(zhi)保(bao)(bao)溫管(guan)(guan)(guan)焊接(jie)是一項(xiang)保(bao)(bao)證(zheng)工(gong)(gong)(gong)(gong)程(cheng)質量的(de)(de)(de)關(guan)鍵工(gong)(gong)(gong)(gong)作(zuo)(zuo)，在(zai)管(guan)(guan)(guan)道(dao)施(shi)(shi)工(gong)(gong)(gong)(gong)中。4、各(ge)種井室的(de)(de)(de)施(shi)(shi)工(gong)(gong)(gong)(gong)質量直(zhi)(zhi)接(jie)影(ying)響工(gong)(gong)(gong)(gong)程(cheng)質量和(he)管(guan)(guan)(guan)道(dao)的(de)(de)(de)使用(yong)壽命。如(ru)(ru)井室防水不(bu)(bu)(bu)(bu)好(hao)，將使部件因浸水遭(zao)到破壞。因此，應(ying)認真(zhen)施(shi)(shi)工(gong)(gong)(gong)(gong)，確保(bao)(bao)施(shi)(shi)工(gong)(gong)(gong)(gong)質量5、滿足打(da)壓(ya)(ya)(ya)條件下，必(bi)需(xu)(xu)重(zhong)視(shi)管(guan)(guan)(guan)道(dao)的(de)(de)(de)打(da)壓(ya)(ya)(ya)。首(shou)先進行灌水排凈空氣，然后(hou)分(fen)兩步做(zuo)：穩壓(ya)(ya)(ya)10分(fen)內無(wu)滲(shen)漏。強(qiang)度(du)試驗：把管(guan)(guan)(guan)道(dao)內的(de)(de)(de)壓(ya)(ya)(ya)力(li)(li)升至作(zuo)(zuo)壓(ya)(ya)(ya)力(li)(li)的(de)(de)(de)1．5倍后(hou)；用(yong)1kg小錘在(zai)焊縫(feng)周圍對(dui)焊縫(feng)逐個(ge)(ge)進行敲打(da)檢查(cha)，嚴密(mi)性試驗：把管(guan)(guan)(guan)內的(de)(de)(de)壓(ya)(ya)(ya)力(li)(li)降至工(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)力(li)(li)時，30分(fen)鐘無(wu)滲(shen)漏且(qie)壓(ya)(ya)(ya)力(li)(li)降不(bu)(bu)(bu)(bu)超過0．2個(ge)(ge)大氣壓(ya)(ya)(ya)即為合(he)格；應(ying)按規范要求做(zuo)好(hao)試壓(ya)(ya)(ya)記錄(lu)。6、因保(bao)(bao)溫管(guan)(guan)(guan)埋(mai)于(yu)地下，工(gong)(gong)(gong)(gong)程(cheng)驗收。絕大部分(fen)屬于(yu)隱蔽工(gong)(gong)(gong)(gong)程(cheng)，如(ru)(ru)果竣工(gong)(gong)(gong)(gong)驗收不(bu)(bu)(bu)(bu)認真(zhen)，竣工(gong)(gong)(gong)(gong)資料不(bu)(bu)(bu)(bu)詳細，將會影(ying)響以(yi)后(hou)的(de)(de)(de)使

聚(ju)氨酯(zhi)保(bao)(bao)(bao)(bao)(bao)溫(wen)管(guan)在(zai)(zai)維護(hu)中需要注意以(yi)下幾點7、接(jie)頭，回填土應在(zai)(zai)管(guan)道試壓。竣工(gong)(gong)(gong)(gong)(gong)(gong)丈量，清掃完(wan)畢后(hou)方(fang)可進(jin)行(xing)(xing)，且必需按聚(ju)氨酯(zhi)保(bao)(bao)(bao)(bao)(bao)溫(wen)管(guan)施(shi)工(gong)(gong)(gong)(gong)(gong)(gong)特點回填規定厚度砂子，千(qian)萬不可偷工(gong)(gong)(gong)(gong)(gong)(gong)減料。8、必需引起(qi)足(zu)夠重(zhong)視。現(xian)(xian)場接(jie)頭保(bao)(bao)(bao)(bao)(bao)溫(wen)須(xu)在(zai)(zai)試壓合格后(hou)方(fang)可進(jin)行(xing)(xing)，現(xian)(xian)場接(jie)頭保(bao)(bao)(bao)(bao)(bao)溫(wen)施(shi)工(gong)(gong)(gong)(gong)(gong)(gong)。這一項內容是聚(ju)氨酯(zhi)保(bao)(bao)(bao)(bao)(bao)溫(wen)管(guan)道施(shi)工(gong)(gong)(gong)(gong)(gong)(gong)特有的(de)(de)(de)，施(shi)工(gong)(gong)(gong)(gong)(gong)(gong)質量好壞直接(jie)影(ying)響使用(yong)壽命。保(bao)(bao)(bao)(bao)(bao)溫(wen)層有現(xian)(xian)場發(fa)泡(pao)施(shi)工(gong)(gong)(gong)(gong)(gong)(gong)和保(bao)(bao)(bao)(bao)(bao)溫(wen)瓦施(shi)工(gong)(gong)(gong)(gong)(gong)(gong)兩種方(fang)法，不論采用(yong)哪種方(fang)法施(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，都(dou)(dou)不能出現(xian)(xian)環形空間，開(kai)裂(lie)、脫層等缺陷，維護(hu)層的(de)(de)(de)做法有多(duo)(duo)種(如高密度聚(ju)乙烯和玻璃鋼保(bao)(bao)(bao)(bao)(bao)護(hu)層)但都(dou)(dou)必須(xu)保(bao)(bao)(bao)(bao)(bao)證接(jie)頭的(de)(de)(de)整體性，嚴密性，防水性。　直埋(mai)式(shi)預制保(bao)(bao)(bao)(bao)(bao)溫(wen)管(guan)道，特別(bie)是各(ge)式(shi)各(ge)樣的(de)(de)(de)保(bao)(bao)(bao)(bao)(bao)溫(wen)結構型式(shi)的(de)(de)(de)城鎮集中供熱(re)或“熱(re)、電、冷”三聯供的(de)(de)(de)蒸汽(qi)管(guan)道正在(zai)(zai)國(guo)內外應用(yong)，方(fang)興未艾。直埋(mai)管(guan)道的(de)(de)(de)熱(re)補償是最重(zhong)要的(de)(de)(de)關鍵技術之(zhi)一，由于設(she)計(ji)、制作、施(shi)工(gong)(gong)(gong)(gong)(gong)(gong)或生產(chan)操作上的(de)(de)(de)多(duo)(duo)種原(yuan)因，曾(ceng)發(fa)生多(duo)(duo)起(qi)嚴重(zhong)事故，造成不應有的(de)(de)(de)人身傷亡和嚴重(zhong)經濟損失(shi)。根據多(duo)(duo)年研究、工(gong)(gong)(gong)(gong)(gong)(gong)程實踐和文獻資料，就直埋(mai)式(shi)預制高溫(wen)保(bao)(bao)(bao)(bao)(bao)溫(wen)管(guan)道的(de)(de)(de)熱(re)補償的(de)(de)(de)設(she)計(ji)和存在(zai)(zai)問題(ti)，做一專題(ti)分析。