一、pe管是什么管材
pe管是乙(yi)烯經聚合制得的(de)(de)一(yi)種熱塑性(xing)樹脂,中(zhong)文(wen)名(ming)稱聚乙(yi)烯。pe無(wu)臭無(wu)毒,手(shou)感似蠟,具有優良的(de)(de)耐低溫性(xing)能,而且其(qi)化學穩定(ding)性(xing)好,可(ke)以(yi)耐大多(duo)數酸(suan)堿的(de)(de)侵蝕。pe管的(de)(de)使用(yong)領域(yu)廣泛,其(qi)中(zhong)給水管和燃氣管是其(qi)兩個最大的(de)(de)應(ying)用(yong)市(shi)場。
根據(ju)溫度(du)等聚合反應條件不同,可得出不同密度(du)的樹(shu)脂,因而又有高(gao)密度(du)聚乙(yi)烯(xi)、中密度(du)聚乙(yi)烯(xi)和低密度(du)聚乙(yi)烯(xi)之分。
二、pe管的性能特點
1、良好的衛生性能:品牌PE管加(jia)工時(shi)不添(tian)加(jia)重金屬鹽穩定(ding)劑,材質無毒性,無結垢層,不滋生(sheng)細菌(jun),很好地解決了(le)城市飲用水的二(er)次(ci)污染。
2、卓越的(de)耐腐蝕(shi)性能:除(chu)少數強氧(yang)化(hua)劑外,可耐多種化(hua)學介質的(de)侵(qin)蝕(shi);無電化(hua)學腐蝕(shi)。
3、長(chang)久的使(shi)用壽命(ming):在(zai)額(e)定溫度、壓力狀況下(xia),PE管道(dao)可(ke)安全使(shi)用50年以上。
4、較好(hao)的耐沖擊性:PE管韌性好(hao),耐沖擊強度高(gao),重物直接壓(ya)過管道,不會導(dao)致管道破裂。
5、可(ke)靠的連接(jie)性能:PE管熱熔(rong)或(huo)電熔(rong)接(jie)口(kou)的強度高于(yu)管材本體,接(jie)縫不會由于(yu)土壤移(yi)動或(huo)活載荷的作用斷(duan)開。
6、良好的(de)施(shi)(shi)工(gong)性能:管道質輕,焊接工(gong)藝(yi)簡單,施(shi)(shi)工(gong)方便,工(gong)程綜合造價低。
三、pe管的型號和規格
PE管(guan)從(cong)壓(ya)力(li)(li)等(deng)(deng)級主(zhu)要分為0.6Mpa,0.8Mpa,1.0Mpa,1.25Mpa,1.6Mpa。Mpa是壓(ya)力(li)(li)單(dan)位(wei)(wei),0.1Mpa等(deng)(deng)于一(yi)公斤。根據PE管(guan)的(de)口(kou)徑(jing)(jing)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(dan)位(wei)(wei)為毫米(mi),PE管(guan)口(kou)徑(jing)(jing)指外徑(jing)(jing),對應壓(ya)力(li)(li)等(deng)(deng)級的(de)不(bu)同,管(guan)材(cai)的(de)壁厚不(bu)同。
四、PE給水管連接方式
1、熱熔連接
熱(re)(re)(re)熔(rong)(rong)(rong)(rong)(rong)連(lian)(lian)接(jie)(jie)(jie)是用專用加熱(re)(re)(re)工(gong)具(ju)(ju),在壓力下加熱(re)(re)(re)聚乙烯管材或管件(jian)的待連(lian)(lian)接(jie)(jie)(jie)部位(wei),使其(qi)熔(rong)(rong)(rong)(rong)(rong)融(rong)后,移走加熱(re)(re)(re)工(gong)具(ju)(ju),施壓將兩個熔(rong)(rong)(rong)(rong)(rong)融(rong)面連(lian)(lian)在一起,在穩定的壓力下保持(chi)一段(duan)時間,直到接(jie)(jie)(jie)頭冷卻。熱(re)(re)(re)熔(rong)(rong)(rong)(rong)(rong)連(lian)(lian)接(jie)(jie)(jie)包括熱(re)(re)(re)熔(rong)(rong)(rong)(rong)(rong)對接(jie)(jie)(jie)連(lian)(lian)接(jie)(jie)(jie)、熱(re)(re)(re)熔(rong)(rong)(rong)(rong)(rong)承插連(lian)(lian)接(jie)(jie)(jie)、熱(re)(re)(re)熔(rong)(rong)(rong)(rong)(rong)鞍型連(lian)(lian)接(jie)(jie)(jie)。
2、電熔連接
電(dian)(dian)(dian)熔(rong)(rong)連(lian)(lian)接(jie)是用內(nei)埋電(dian)(dian)(dian)阻絲(si)的(de)(de)專用電(dian)(dian)(dian)熔(rong)(rong)管件(jian)與(yu)管材或管件(jian)的(de)(de)連(lian)(lian)接(jie)部位(wei)緊密接(jie)觸(chu)通(tong)電(dian)(dian)(dian),通(tong)過內(nei)埋的(de)(de)電(dian)(dian)(dian)阻絲(si)加熱連(lian)(lian)接(jie)部位(wei),使其熔(rong)(rong)融(rong)連(lian)(lian)為一體(ti)(ti),直至接(jie)頭冷卻。電(dian)(dian)(dian)熔(rong)(rong)連(lian)(lian)接(jie)可(ke)用于(yu)與(yu)不同(tong)類(lei)型(xing)和不同(tong)熔(rong)(rong)體(ti)(ti)流動速率的(de)(de)聚(ju)乙(yi)烯管材或插口管件(jian)連(lian)(lian)接(jie)。電(dian)(dian)(dian)熔(rong)(rong)連(lian)(lian)接(jie)分為電(dian)(dian)(dian)熔(rong)(rong)承插連(lian)(lian)接(jie)和電(dian)(dian)(dian)熔(rong)(rong)鞍型(xing)連(lian)(lian)接(jie)。
3、承插式柔性連接
聚乙烯管(guan)(guan)道(dao)承插(cha)式(shi)柔(rou)(rou)性連(lian)接是參照鑄鐵管(guan)(guan)和聚氯(lv)乙烯管(guan)(guan)(PVC U)的承插(cha)式(shi)柔(rou)(rou)性連(lian)接原理開發的一(yi)(yi)種(zhong)新(xin)型連(lian)接方式(shi),它是在聚乙烯管(guan)(guan)材(cai)(cai)一(yi)(yi)端焊(han)接一(yi)(yi)個經過加固(gu)的聚乙烯承口(kou)。承插(cha)式(shi)柔(rou)(rou)性連(lian)接是將聚乙烯管(guan)(guan)材(cai)(cai)一(yi)(yi)端直接插(cha)入(ru)管(guan)(guan)材(cai)(cai)或管(guan)(guan)件的特(te)制的承口(kou)中,通過承口(kou)內的鎖緊環壓緊抗(kang)拉拔、橡膠密封圈壓緊密封,達到連(lian)接管(guan)(guan)材(cai)(cai)和管(guan)(guan)件的目的。
4、法蘭連接
法蘭(lan)(lan)(lan)連(lian)接(jie)(jie)主(zhu)要(yao)用于聚乙(yi)烯(xi)管道與金屬管道或(huo)(huo)閥門、流(liu)量計(ji)、壓力表等(deng)附屬設備的連(lian)接(jie)(jie)。法蘭(lan)(lan)(lan)連(lian)接(jie)(jie)主(zhu)要(yao)由聚乙(yi)烯(xi)法蘭(lan)(lan)(lan)連(lian)接(jie)(jie)件(jian)、鋼制(zhi)或(huo)(huo)鋁制(zhi)背壓活套法蘭(lan)(lan)(lan)、鋼制(zhi)或(huo)(huo)鋁制(zhi)法蘭(lan)(lan)(lan)片(pian)、墊片(pian)或(huo)(huo)密封(feng)圈、螺栓、螺母(mu)等(deng)組成。法蘭(lan)(lan)(lan)連(lian)接(jie)(jie)是通(tong)過緊固螺栓、螺母(mu),使(shi)法蘭(lan)(lan)(lan)連(lian)接(jie)(jie)件(jian)與法蘭(lan)(lan)(lan)片(pian)緊密接(jie)(jie)觸(chu),達到連(lian)接(jie)(jie)目的。
5、鋼塑過渡接頭連接
鋼(gang)塑(su)過(guo)(guo)渡(du)接(jie)頭連(lian)接(jie)是(shi)采用通過(guo)(guo)冷壓(ya)或其它(ta)方式預(yu)制的鋼(gang)塑(su)過(guo)(guo)渡(du)接(jie)頭來連(lian)接(jie)聚乙烯(xi)管道(dao)和金屬管道(dao)。鋼(gang)塑(su)過(guo)(guo)渡(du)接(jie)頭內有(you)抗(kang)拉(la)(la)拔的鎖(suo)緊環和密封(feng)圈,通常(chang)要求(qiu)其有(you)良好(hao)的密封(feng)性(xing)能和抗(kang)拉(la)(la)拔、耐壓(ya)性(xing)能要大于(yu)系統中聚乙烯(xi)管道(dao)。