一、pe管是什么管材
pe管(guan)是乙(yi)烯經聚合制得的(de)一種熱塑性樹脂,中文名稱聚乙(yi)烯。pe無臭無毒,手感似蠟,具有優良(liang)的(de)耐(nai)低溫性能,而(er)且(qie)其化學穩定性好,可以(yi)耐(nai)大多數酸堿的(de)侵蝕(shi)。pe管(guan)的(de)使用領域廣泛,其中給(gei)水管(guan)和燃氣管(guan)是其兩個(ge)最大的(de)應用市場(chang)。
根據溫度(du)(du)等聚(ju)(ju)合反應條件不同,可得出不同密度(du)(du)的樹脂,因而(er)又有高(gao)密度(du)(du)聚(ju)(ju)乙(yi)(yi)烯(xi)、中密度(du)(du)聚(ju)(ju)乙(yi)(yi)烯(xi)和低(di)密度(du)(du)聚(ju)(ju)乙(yi)(yi)烯(xi)之(zhi)分。
二、pe管的性能特點
1、良好的衛生性能:品牌PE管加工時(shi)不添加重(zhong)金屬鹽(yan)穩定劑,材(cai)質無(wu)毒性(xing),無(wu)結垢層,不滋生細(xi)菌,很(hen)好地(di)解決了城市飲用水的二次污染(ran)。
2、卓越(yue)的耐腐蝕(shi)性能:除少數強氧化劑外(wai),可耐多(duo)種化學介(jie)質的侵蝕(shi);無電化學腐蝕(shi)。
3、長久的使用(yong)壽命:在額定(ding)溫度(du)、壓力狀(zhuang)況下(xia),PE管道可安全使用(yong)50年以上。
4、較好的耐沖擊性:PE管韌(ren)性好,耐沖擊強度高,重(zhong)物直接壓過管道,不會導致(zhi)管道破裂。
5、可靠的連接(jie)性能:PE管(guan)熱熔(rong)或電熔(rong)接(jie)口的強(qiang)度(du)高于管(guan)材本體,接(jie)縫不會(hui)由于土壤移(yi)動或活(huo)載荷的作用斷(duan)開。
6、良好(hao)的施工(gong)性能(neng):管道質輕,焊接(jie)工(gong)藝(yi)簡單,施工(gong)方便,工(gong)程綜合造價低。
三、pe管的型號和規格
PE管從壓(ya)力等(deng)級主要分為0.6Mpa,0.8Mpa,1.0Mpa,1.25Mpa,1.6Mpa。Mpa是壓(ya)力單位(wei),0.1Mpa等(deng)于(yu)一(yi)公斤(jin)。根據PE管的口徑來分大體(ti)可以分為20,25,32,40,50,63,75,90,110,125,160,180,200,225,250,280,315,355,400,450,500,560,630,710,800,900,1000,1200,單位(wei)為毫(hao)米,PE管口徑指外徑,對應壓(ya)力等(deng)級的不(bu)(bu)同(tong),管材的壁(bi)厚不(bu)(bu)同(tong)。
四、PE給水管連接方式
1、熱熔連接
熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)連(lian)接(jie)(jie)(jie)是用專用加熱(re)(re)(re)(re)工(gong)(gong)具(ju),在(zai)壓(ya)力下加熱(re)(re)(re)(re)聚(ju)乙烯(xi)管(guan)材或管(guan)件的待連(lian)接(jie)(jie)(jie)部位(wei),使其熔(rong)(rong)(rong)(rong)融后,移走加熱(re)(re)(re)(re)工(gong)(gong)具(ju),施(shi)壓(ya)將兩個熔(rong)(rong)(rong)(rong)融面連(lian)在(zai)一(yi)起,在(zai)穩(wen)定的壓(ya)力下保持一(yi)段時(shi)間,直到接(jie)(jie)(jie)頭(tou)冷卻。熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)連(lian)接(jie)(jie)(jie)包括(kuo)熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)對接(jie)(jie)(jie)連(lian)接(jie)(jie)(jie)、熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)承插(cha)連(lian)接(jie)(jie)(jie)、熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)鞍型連(lian)接(jie)(jie)(jie)。
2、電熔連接
電(dian)(dian)(dian)(dian)熔(rong)連(lian)(lian)接(jie)(jie)是用(yong)內(nei)埋電(dian)(dian)(dian)(dian)阻(zu)絲的專用(yong)電(dian)(dian)(dian)(dian)熔(rong)管(guan)(guan)(guan)件(jian)與管(guan)(guan)(guan)材或(huo)管(guan)(guan)(guan)件(jian)的連(lian)(lian)接(jie)(jie)部位緊密接(jie)(jie)觸通電(dian)(dian)(dian)(dian),通過(guo)內(nei)埋的電(dian)(dian)(dian)(dian)阻(zu)絲加熱連(lian)(lian)接(jie)(jie)部位,使其(qi)熔(rong)融連(lian)(lian)為(wei)(wei)一體(ti),直(zhi)至接(jie)(jie)頭冷卻(que)。電(dian)(dian)(dian)(dian)熔(rong)連(lian)(lian)接(jie)(jie)可用(yong)于與不(bu)同(tong)類型和不(bu)同(tong)熔(rong)體(ti)流動速率(lv)的聚乙烯管(guan)(guan)(guan)材或(huo)插口管(guan)(guan)(guan)件(jian)連(lian)(lian)接(jie)(jie)。電(dian)(dian)(dian)(dian)熔(rong)連(lian)(lian)接(jie)(jie)分為(wei)(wei)電(dian)(dian)(dian)(dian)熔(rong)承(cheng)插連(lian)(lian)接(jie)(jie)和電(dian)(dian)(dian)(dian)熔(rong)鞍型連(lian)(lian)接(jie)(jie)。
3、承插式柔性連接
聚乙(yi)烯管(guan)(guan)道承(cheng)(cheng)插(cha)式柔性(xing)連(lian)接(jie)是參(can)照鑄(zhu)鐵管(guan)(guan)和聚氯乙(yi)烯管(guan)(guan)(PVC U)的(de)承(cheng)(cheng)插(cha)式柔性(xing)連(lian)接(jie)原理開發的(de)一種(zhong)新型(xing)連(lian)接(jie)方式,它是在聚乙(yi)烯管(guan)(guan)材(cai)一端(duan)焊(han)接(jie)一個經過(guo)加固的(de)聚乙(yi)烯承(cheng)(cheng)口(kou)。承(cheng)(cheng)插(cha)式柔性(xing)連(lian)接(jie)是將(jiang)聚乙(yi)烯管(guan)(guan)材(cai)一端(duan)直接(jie)插(cha)入管(guan)(guan)材(cai)或管(guan)(guan)件的(de)特制的(de)承(cheng)(cheng)口(kou)中,通(tong)過(guo)承(cheng)(cheng)口(kou)內的(de)鎖緊(jin)環壓(ya)緊(jin)抗(kang)拉拔、橡膠密封圈壓(ya)緊(jin)密封,達到(dao)連(lian)接(jie)管(guan)(guan)材(cai)和管(guan)(guan)件的(de)目的(de)。
4、法蘭連接
法(fa)(fa)蘭(lan)連接主要用(yong)于聚(ju)乙烯(xi)管道與(yu)金屬管道或(huo)閥門、流量計(ji)、壓(ya)力表(biao)等附(fu)屬設備(bei)的(de)連接。法(fa)(fa)蘭(lan)連接主要由聚(ju)乙烯(xi)法(fa)(fa)蘭(lan)連接件、鋼制(zhi)(zhi)(zhi)或(huo)鋁制(zhi)(zhi)(zhi)背壓(ya)活套法(fa)(fa)蘭(lan)、鋼制(zhi)(zhi)(zhi)或(huo)鋁制(zhi)(zhi)(zhi)法(fa)(fa)蘭(lan)片、墊片或(huo)密(mi)封圈、螺(luo)栓(shuan)、螺(luo)母等組(zu)成。法(fa)(fa)蘭(lan)連接是通(tong)過緊固(gu)螺(luo)栓(shuan)、螺(luo)母,使法(fa)(fa)蘭(lan)連接件與(yu)法(fa)(fa)蘭(lan)片緊密(mi)接觸,達到連接目的(de)。
5、鋼塑過渡接頭連接
鋼(gang)塑過渡(du)接頭(tou)連接是采用(yong)通過冷(leng)壓或其(qi)它方式預制(zhi)的(de)鋼(gang)塑過渡(du)接頭(tou)來連接聚乙(yi)烯管(guan)(guan)道和金屬(shu)管(guan)(guan)道。鋼(gang)塑過渡(du)接頭(tou)內(nei)有(you)抗(kang)拉拔的(de)鎖緊(jin)環和密封圈,通常要求其(qi)有(you)良好的(de)密封性能和抗(kang)拉拔、耐壓性能要大于系統中(zhong)聚乙(yi)烯管(guan)(guan)道。