現在很(hen)多(duo)供水系統都會選擇采用(yong)四川PE管,這是為什么呢?跟著小(xiao)編來看具體的原因。
國(guo)外(wai)(wai)城鄉(xiang)供水用(yong)(yong)的(de)塑料室外(wai)(wai)給水管(guan)(guan)(guan)主要(yao)(yao)采(cai)用(yong)(yong)的(de)是(shi)聚(ju)乙(yi)烯PE管(guan)(guan)(guan),原因是(shi)pe管(guan)(guan)(guan)的(de)強度(du)較高,成本比較低(di)。目前(qian)不少國(guo)家還主要(yao)(yao)采(cai)用(yong)(yong)PE管(guan)(guan)(guan)。怛是(shi)值得注意(yi)的(de)是(shi)近年(nian)來(lai)國(guo)外(wai)(wai)在逐步增(zeng)加(jia)采(cai)用(yong)(yong)HDPE管(guan)(guan)(guan)做城鄉(xiang)供水用(yong)(yong)室外(wai)(wai)埋地(di)給水管(guan)(guan)(guan),統(tong)計資料表明,歐洲在城鄉(xiang)供水管(guan)(guan)(guan)領域(yu)應(ying)用(yong)(yong)聚(ju)乙(yi)烯管(guan)(guan)(guan)已經(jing)多于(yu)pcv管(guan)(guan)(guan)。1997年(nian)歐洲飲(yin)水管(guan)(guan)(guan)市(shi)場總計是(shi)422715t,其中(zhong)(zhong)高、中(zhong)(zhong)密度(du)聚(ju)乙(yi)烯管(guan)(guan)(guan)24900t(占59. 10-10),低(di)密度(du)聚(ju)乙(yi)烯(LDPE)管(guan)(guan)(guan)10315t(占2.4%),而聚(ju)氯乙(yi)烯管(guan)(guan)(guan)是(shi)162500t(占38.5)。分析其原因是(shi):近年(nian)聚(ju)乙(yi)烯材料的(de)不斷進步。
國際上(shang)對應(ying)(ying)用(yong)(yong)于管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)(cai)的(de)(de)(de)(de)(de)(de)(de)聚乙(yi)(yi)烯材(cai)(cai)(cai)料(liao)(liao)一(yi)直(zhi)不(bu)斷地在(zai)研(yan)究(jiu)和改進(jin),正是(shi)因為(wei)材(cai)(cai)(cai)料(liao)(liao)性能(neng)的(de)(de)(de)(de)(de)(de)(de)不(bu)斷提高和改進(jin),增(zeng)強了聚乙(yi)(yi)烯管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)優勢,擴(kuo)(kuo)大(da)了聚乙(yi)(yi)烯管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)應(ying)(ying)用(yong)(yong)領(ling)域。六(liu)十(shi)年(nian)代(dai),為(wei)了燃氣管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)應(ying)(ying)用(yong)(yong),國外開發(fa)了具有較高“長期(qi)靜(jing)液壓強度”和抗開裂(lie)能(neng)力的(de)(de)(de)(de)(de)(de)(de)聚乙(yi)(yi)烯管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)(cai)料(liao)(liao),我國“七五”期(qi)間已(yi)開發(fa)了燃氣管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)專(zhuan)用(yong)(yong)料(liao)(liao),接(jie)近國際上(shang)性能(neng)得到(dao)公認(ren)的(de)(de)(de)(de)(de)(de)(de)PE80級(ji)的(de)(de)(de)(de)(de)(de)(de)水(shui)平。到(dao)了八(ba)十(shi)年(nian)代(dai)出(chu)現了被稱為(wei)“第三代(dai)聚乙(yi)(yi)烯管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)(cai)料(liao)(liao)”的(de)(de)(de)(de)(de)(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)(cai)專(zhuan)用(yong)(yong)原料(liao)(liao)PElOO。國際上(shang)有幾大(da)石油化工業企業已(yi)經大(da)量生產(chan)PElOO級(ji)聚乙(yi)(yi)烯管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)(cai)料(liao)(liao)。PElOO的(de)(de)(de)(de)(de)(de)(de)聚乙(yi)(yi)烯管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)因為(wei)容許更(geng)大(da)的(de)(de)(de)(de)(de)(de)(de)應(ying)(ying)力,可(ke)以在(zai)同(tong)樣使用(yong)(yong)壓力下(xia)減(jian)少壁(bi)厚,增(zeng)加(jia)輸(shu)(shu)送(song)(song)(song)截(jie)面(例如在(zai)lObak壓力下(xia)輸(shu)(shu)送(song)(song)(song)水(shui),用(yong)(yong)PElOO的(de)(de)(de)(de)(de)(de)(de)聚乙(yi)(yi)烯管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)比用(yong)(yong)PE80的(de)(de)(de)(de)(de)(de)(de)聚乙(yi)(yi)烯管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)壁(bi)厚減(jian)少33%,輸(shu)(shu)送(song)(song)(song)截(jie)面增(zeng)加(jia)16%,輸(shu)(shu)送(song)(song)(song)能(neng)力可(ke)以增(zeng)加(jia)35%),或者在(zai)同(tong)樣壁(bi)厚下(xia)增(zeng)加(jia)所用(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)壓力,提高輸(shu)(shu)送(song)(song)(song)能(neng)力。特(te)別是(shi)在(zai)直(zhi)徑較大(da),使用(yong)(yong)環境較差(如低溫)的(de)(de)(de)(de)(de)(de)(de)場合(he)用(yong)(yong)PElOO才能(neng)保證(zheng)安全(quan)性。換(huan)句話(hua)說PEIOO的(de)(de)(de)(de)(de)(de)(de)出(chu)現使聚乙(yi)(yi)烯管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)應(ying)(ying)用(yong)(yong)范(fan)圍擴(kuo)(kuo)大(da)到(dao)了壓力更(geng)高(輸(shu)(shu)送(song)(song)(song)天然氣可(ke)達lObar,輸(shu)(shu)送(song)(song)(song)水(shui)可(ke)達25bar),直(zhi)徑更(geng)大(da),環境更(geng)差的(de)(de)(de)(de)(de)(de)(de)場合(he)。
pe管獨特的(de)(de)柔(rou)韌(ren)性和可(ke)熔(rong)性使其鋪(pu)設時(shi)方便經(jing)濟(ji)和使用(yong)(yong)中安全可(ke)靠,應用(yong)(yong)量大(da)的(de)(de)排(pai)水、給(gei)水、燃氣管道(dao)等都(dou)在室外埋(mai)地鋪(pu)設。
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