指标容量 kg/m抗(kang)压(ya)强度(du) MPa导热(re)系数 W/mk <，0.025 抗(kang)压(ya)强度(du) MPa耐热(re)性(xing) ℃ ≤120 表(biao)层(ceng)硬度(du) MPa <，320耐寒(han)性(xing) ℃ ≥-50 击穿电(dian)(dian)(dian)压(ya) KV >，25。工(gong)(gong)(gong)(gong)(gong)作(zuo)钢(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)：保证输送(song)介(jie)质正常流动(dong)。四，施(shi)工(gong)(gong)(gong)(gong)(gong)应(ying)注(zhu)意(yi)的(de)(de)(de)(de)事项：1，施(shi)工(gong)(gong)(gong)(gong)(gong)时(shi)应(ying)避免地下(xia)水及雨(yu)水的(de)(de)(de)(de)浸(jin)泡(pao)(pao)(pao)，若端头(tou)不慎浸(jin)水，连接(jie)(jie)(jie)外套(tao)前应(ying)做干燥(zao)处理(li)。管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)材应(ying)储(chu)存在(zai)平整的(de)(de)(de)(de)场(chang)地，整齐码放(fang)，码放(fang)高度(du)应(ying)小(xiao)于1.5米(mi)。管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)材吊(diao)装(zhuang)在(zai)轻(qing)(qing)装(zhuang)轻(qing)(qing)放(fang)，禁(jin)碰撞，抛掷，禁(jin)用(yong)(yong)钢(gang)丝绳直(zhi)(zhi)(zhi)吊(diao)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)身。保温(wen)层(ceng)及防腐层(ceng)应(ying)避免火焰(yan)直(zhi)(zhi)(zhi)接(jie)(jie)(jie)接(jie)(jie)(jie)触。 现场(chang)安(an)装(zhuang)请按下(xia)列程序：管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)沟开挖－－基底处理(li)（排(pai)水，垫砂）－下(xia)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)－－钢(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)焊(han)接(jie)(jie)(jie)－检验（水压(ya)）－安(an)装(zhuang)（试压(ya)）－发泡(pao)(pao)(pao)－封发泡(pao)(pao)(pao)孔(kong)(kong)。3弯头(tou)通过(guo)补片或(huo)热(re)熔(rong)(rong)焊(han)接(jie)(jie)(jie)的(de)(de)(de)(de)方(fang)(fang)(fang)式(shi)(shi)密封发泡(pao)(pao)(pao)孔(kong)(kong)。 （2）热(re)收(shou)缩(suo)带 在(zai)如下(xia)三(san)种无补偿敷设(she)方(fang)(fang)(fang)式(shi)(shi)中更能显示其优(you)势(shi)。冷安(an)装(zhuang)方(fang)(fang)(fang)式(shi)(shi)全(quan)方(fang)(fang)(fang)位(wei)焊(han)接(jie)(jie)(jie)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)线(xian)时(shi)的(de)(de)(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)温(wen)度(du)多(duo)于回填时(shi)的(de)(de)(de)(de)环(huan)(huan)境温(wen)度(du)。 冷安(an)装(zhuang)是(shi)(shi)最(zui)经(jing)济最(zui)快捷的(de)(de)(de)(de)一种安(an)装(zhuang)方(fang)(fang)(fang)法(fa)。管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)路在(zai)施(shi)工(gong)(gong)(gong)(gong)(gong)同时(shi)便可以(yi)及时(shi)回填，因最(zui)大限度(du)地环(huan)(huan)比甚至(zhi)(zhi)完全(quan)不能设(she)置补偿器及固定支架，从而(er)(er)节约(yue)(yue)少部分钱。因为(wei)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)轴向(xiang)应(ying)力(li)增多(duo)了，所以(yi)有(you)时(shi)有(you)必要(yao)对三(san)通实施(shi)进而(er)(er)使处理(li)或(huo)普遍(bian)增多(duo)埋(mai)设(she)深度(du)。直(zhi)(zhi)(zhi)埋(mai)保温(wen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分类(lei)别：1，塑(su)套(tao)钢(gang)保温(wen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)：塑(su)套(tao)钢(gang)保温(wen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)(shi)由高密度(du)聚乙(yi)烯(xi)外套(tao)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，聚氨(an)酯泡(pao)(pao)(pao)沫(mo)(mo)保温(wen)层(ceng)及内工(gong)(gong)(gong)(gong)(gong)作(zuo)钢(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)紧密结合(he)而(er)(er)成。2，钢(gang)套(tao)钢(gang)保温(wen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)：钢(gang)套(tao)钢(gang)保温(wen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)(shi)由外护(hu)(hu)钢(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)加(jia)钢(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)防腐，聚氨(an)酯泡(pao)(pao)(pao)沫(mo)(mo)保温(wen)层(ceng)及内工(gong)(gong)(gong)(gong)(gong)作(zuo)钢(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)组合(he)而(er)(er)成。在(zai)采(cai)用(yong)(yong)热(re)收(shou)缩(suo)带的(de)(de)(de)(de)接(jie)(jie)(jie)头(tou)方(fang)(fang)(fang)式(shi)(shi)中，热(re)收(shou)缩(suo)带是(shi)(shi)有(you)关(guan)于接(jie)(jie)(jie)头(tou)寿命和密封性(xing)起到至(zhi)(zhi)关(guan)重要(yao)与特(te)质材料(liao)。（3）电(dian)(dian)(dian)熔(rong)(rong)套(tao)筒，此(ci)种焊(han)接(jie)(jie)(jie)方(fang)(fang)(fang)式(shi)(shi)采(cai)用(yong)(yong)预埋(mai)电(dian)(dian)(dian)阻丝的(de)(de)(de)(de)套(tao)筒，用(yong)(yong)带把热(re)熔(rong)(rong)捆在(zai)外套(tao)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)上(shang)(shang)(shang)，再之后接(jie)(jie)(jie)通电(dian)(dian)(dian)源开始焊(han)接(jie)(jie)(jie)，焊(han)接(jie)(jie)(jie)时(shi)间为(wei)预先设(she)定，自动(dong)断电(dian)(dian)(dian)后结束焊(han)接(jie)(jie)(jie)，在(zai)套(tao)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)完全(quan)冷却后卸下(xia)绑带。采(cai)用(yong)(yong)此(ci)种方(fang)(fang)(fang)式(shi)(shi)接(jie)(jie)(jie)头(tou)，施(shi)工(gong)(gong)(gong)(gong)(gong)简便，焊(han)口牢固。安(an)装(zhuang)方(fang)(fang)(fang)式(shi)(shi)此(ci)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)路系统在(zai)所有(you)已知的(de)(de)(de)(de)直(zhi)(zhi)(zhi)埋(mai)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)路系统的(de)(de)(de)(de)安(an)装(zhuang)方(fang)(fang)(fang)式(shi)(shi)上(shang)(shang)(shang)都能够(gou)应(ying)用(yong)(yong)。除(chu)一般(ban)的(de)(de)(de)(de)有(you)补偿敷设(she)方(fang)(fang)(fang)式(shi)(shi)外。yt008黄夹(jia)克聚氨(an)酯保温(wen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)明(ming)显优(you)势(shi)1.环(huan)(huan)比降低(di)工(gong)(gong)(gong)(gong)(gong)程造(zao)价。据(ju)有(you)关(guan)部门测(ce)算，双管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)制供(gong)热(re)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)，基本上(shang)(shang)(shang)可以(yi)环(huan)(huan)比降低(di)工(gong)(gong)(gong)(gong)(gong)程造(zao)价的(de)(de)(de)(de)25％（采(cai)用(yong)(yong)玻璃钢(gang)做保护(hu)(hu)层(ceng)）和10％（采(cai)用(yong)(yong)高密度(du)聚乙(yi)烯(xi)做保护(hu)(hu)层(ceng)）左右。2.热(re)损耗低(di)，节约(yue)(yue)能源。45%抗(kang)压(ya)强度(du) KPa ≥200 氨(an)凝 KPa吸水率 kg/m2 ≤0.2 使用(yong)(yong)年限 30-50年预制直(zhi)(zhi)(zhi)埋(mai)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)应(ying)用(yong)(yong)：预制直(zhi)(zhi)(zhi)埋(mai)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)适合(he)输送(song)在(zai)-50℃—150℃范围(wei)内的(de)(de)(de)(de)各种介(jie)质的(de)(de)(de)(de)保温(wen)保冷工(gong)(gong)(gong)(gong)(gong)程。聚氨(an)酯直(zhi)(zhi)(zhi)埋(mai)保温(wen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)明(ming)显特(te)点。

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