外壁采用熱熔結纏繞工藝底層環氧樹脂
、中間層膠黏劑
、外層聚乙烯形成三層結構的防腐層

，內壁采用熱噴塗環氧粉末防腐方式TPEPfangfugangguan，jiangfenmojinggaowenjiarerongjiehoujunyunditufuzaiguantibiaomianshang。jidatigaoletucengfuzhelijitucenghoudu
，zengqianglenaikepeng，naifushidenengli。keyijinxing2PE、3PE
、內外塗熱熔環氧、內環氧外PE/2PE/3PE等產品的生產
，且內外塗的產品均可以實現同時塗敷和固化
，一次性成膜。該產品於2009年獲取國家實用新型專利。

聚乙烯三層結構防護層又稱三層PE(3PE)，是近幾年從國外引進的先進的防腐技術。它的全稱為熔結環氧/擠塑聚乙烯結構防護層，結構由以下三層組成：3PE防腐鋼管二底層為熔結環氧(≥80μm);中間層為膠粘劑250μm);麵層為擠塑聚乙烯(約2mm)。防護層總厚度約1.8-3.7mm。

在三層結構中，熔結環氧粉末塗層的主要作用是：形成連續的塗膜，與鋼管表麵直接粘結，具有很好的耐化學腐蝕性和抗陰極剝離性能；與(yu)中(zhong)間(jian)層(ceng)膠(jiao)粘(zhan)劑(ji)的(de)活(huo)性(xing)基(ji)團(tuan)反(fan)應(ying)形(xing)成(cheng)化(hua)學(xue)粘(zhan)結(jie)，保(bao)證(zheng)整(zheng)體(ti)防(fang)腐(fu)層(ceng)在(zai)較(jiao)高(gao)溫(wen)度(du)下(xia)具(ju)有(you)良(liang)好(hao)的(de)粘(zhan)結(jie)性(xing)。中(zhong)間(jian)層(ceng)通(tong)常(chang)為(wei)共(gong)聚(ju)物(wu)粘(zhan)結(jie)劑(ji)，其(qi)主(zhu)要(yao)成(cheng)分(fen)是(shi)聚(ju)烯(xi)烴(ting)，目(mu)前(qian)廣(guang)泛(fan)采(cai)用(yong)的(de)是(shi)乙(yi)烯(xi)基(ji)共(gong)聚(ju)物(wu)膠(jiao)粘(zhan)劑(ji)。共(gong)聚(ju)物(wu)膠(jiao)粘(zhan)劑(ji)的(de)極(ji)性(xing)部(bu)分(fen)官(guan)能(neng)團(tuan)與(yu)熔(rong)結(jie)環(huan)氧(yang)粉(fen)末(mo)塗(tu)層(ceng)的(de)環(huan)氧(yang)基(ji)團(tuan)可(ke)以(yi)反(fan)應(ying)生(sheng)成(cheng)氫(qing)鍵(jian)或(huo)化(hua)學(xue)鍵(jian)，使(shi)中(zhong)間(jian)層(ceng)與(yu)底(di)層(ceng)形(xing)成(cheng)良(liang)好(hao)的(de)粘(zhan)結(jie)；erfeijixingdeyixibufenyumiancengjuyixijuyouhenhaodeqinhezuoyong
，suoyizhongjiancengyumiancengyejuyouhenhaodezhanjiexingneng。juyiximiancengdezhuyaozuoyongshiqijixiebaohuyufangfuzuoyong，yuchuantongdeercengjiegoujuyixifangfucengjuyoutongyangdezuoyong。3PE防腐鋼管三三層結構聚乙烯防腐層(3PE)zonghelerongjiehuanyangfenmotucenghejiyajuyixiliangzhongfangfucengdeyouliangxingzhi
，jiangrongjiehuanyangfenmotucengdejiemiantexinghenaihuaxuetexing

，yujiyajuyixifangfucengdejixiebaohutexingdengyoudianjieheqilai
，congerxianzhugaishanlegezidexingneng。yincizuoweimaidiguanxiandewaifanghucengshifeichangyouyuede。