
化工、天然氣、熱力、汙水處理、水源、橋梁、鋼結構等管道工程領域有廣泛應用。SY/T0413-2002標準的基本框架來源於德國標準DIN3067-1991,guowaibiaozhunduiyuancailiaodexingnengjibenshangbuzuoxiangxiyaoqiu,danduiyuzhuanxingqidezhongguolaijiang,xinyuwentihaimeiyouqudegenbenhaozhuan,duiyuancailiaotichugengxiangxiyoubianyujianzhadexiangmuxiandeshenmezhongyao,jianyibiaozhunzhongyingtiaozhengyixiajixiangzhibiao:管徑範圍Φ60~Φ1820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:底層為熔結環氧(≥80μm);中間層為膠粘劑(170-250μm);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;而er非fei極ji性xing的de乙yi烯xi部bu分fen與yu麵mian層ceng聚ju乙yi烯xi具ju有you很hen好hao的de親qin合he作zuo用yong,所suo以yi中zhong間jian層ceng與yu麵mian層ceng也ye具ju有you很hen好hao的de粘zhan結jie性xing能neng。聚ju乙yi烯xi麵mian層ceng的de主zhu要yao作zuo用yong是shi起qi機ji械xie保bao護hu與yu防fang腐fu作zuo用yong,與yu傳chuan統tong的de二er層ceng結jie構gou聚ju乙yi烯xi防fang腐fu層ceng具ju有you同tong樣yang的de作zuo用yong。三san層ceng結jie構gou聚ju乙yi烯xi防fang腐fu層ceng(3PE)zonghelerongjiehuanyangfenmotucenghejiyajuyixiliangzhongfangfucengdeyouliangxingzhi,jiangrongjiehuanyangfenmotucengdejiemiantexinghenaihuaxuetexing,yujiyajuyixifangfucengdejixiebaohutexingdengyoudianjieheqilai,congerxianzhugaishanlegezidexingneng。yincizuoweimaidiguanxiandewaifanghucengshifeichangyouyuede。juyouguanziliaojieshao,sancengPE可使埋地管道的壽命達到50年,目前,在國際上被認為是比較先進的管道外防腐技術。在我國,三層PE已率先在石油天然氣係統得到應用。我國已建成的陝京天然氣管道及庫鄯輸油管道,比較近國家重點工程西氣東輸近4000公裏管道均采用了三層PE外防腐塗層。在天津市,陝氣進津67公裏高壓管道、外環線30公裏高壓天然氣管道、陝京線地下儲氣庫122公裏管線也是采用的三層PE。它已成為今後管道外防腐層的發展方向。由我公司生產的內IPN8710外(wai)環(huan)氧(yang)煤(mei)瀝(li)青(qing)防(fang)腐(fu)鋼(gang)管(guan)目(mu)前(qian)主(zhu)要(yao)用(yong)於(yu)市(shi)政(zheng)自(zi)來(lai)水(shui)公(gong)司(si)供(gong)水(shui)用(yong)管(guan)道(dao),外(wai)防(fang)腐(fu)一(yi)般(ban)是(shi)玻(bo)璃(li)布(bu)纏(chan)繞(rao)兩(liang)布(bu)三(san)油(you)環(huan)氧(yang)煤(mei)瀝(li)青(qing)防(fang)腐(fu)鋼(gang)管(guan)產(chan)品(pin)它(ta)是(shi)由(you)由(you)基(ji)帶(dai)和(he)定(ding)型(xing)膠(jiao)兩(liang)部(bu)分(fen)組(zu)成(cheng)。基(ji)帶(dai)選(xuan)用(yong)增(zeng)強(qiang)合(he)成(cheng)纖(xian)維(wei)--丙綸無紡布,浸漬環氧煤瀝青基材膠經脫油製成;定型膠選用無溶劑環氧煤瀝青由甲、乙雙混和配成,按照季節氣溫分常溫和低溫兩種。在出廠時基帶4平方米配裝1kg定型膠配套供給。此外防腐管道產品同時也廣泛應用於石油、化工、電力、城市公用事業等行業即油、氣、自來水、煤氣、供gong暖nuan等deng地di理li鋼gang製zhi管guan道dao和he鋼gang製zhi管guan儲chu罐guan的de外wai表biao防fang腐fu和he修xiu複fu。基ji帶dai與yu防fang腐fu層ceng和he定ding型xing膠jiao已yi經jing由you中zhong石shi油you管guan道dao科ke研yan中zhong心xin和he國guo家jia建jian材cai測ce試shi中zhong心xin測ce試shi完wan成cheng,各ge項xiang指zhi標biao完wan全quan滿man足zuSY/T0379-98、SY/T0447-96和GG/T2284-97標準要求;環氧煤瀝青防腐鋼管內腐蝕介質種類較多,有酸、堿、鹽、氧化劑及水蒸氣等,塗料必須具有化學惰性、耐酸堿鹽腐蝕,塗膜應結構致密,防水滲透性好,附著力強、堅韌豐滿。

