鋼管(guan)(guan)內(nei)(nei)壁防腐涂(tu)層(ceng)(ceng)(ceng)：為(wei)了防止管(guan)(guan)內(nei)(nei)腐蝕、降低摩擦阻力、提高輸量而涂(tu)于(yu)管(guan)(guan)子(zi)內(nei)(nei)壁的(de)薄膜。常用的(de)涂(tu)料有胺(an)固化(hua)環(huan)氧樹(shu)脂(zhi)和聚(ju)酰胺(an)環(huan)氧樹(shu)脂(zhi)，涂(tu)層(ceng)(ceng)(ceng)厚(hou)度為(wei)0.038～0.2毫米。為(wei)保(bao)證涂(tu)層(ceng)(ceng)(ceng)與管(guan)(guan)壁粘結牢(lao)固，必須對鋼管(guan)(guan)內(nei)(nei)壁進行表面處理。70年代以來趨向(xiang)于(yu)管(guan)(guan)內(nei)(nei)、外壁涂(tu)層(ceng)(ceng)(ceng)選用相同的(de)材料，以便管(guan)(guan)內(nei)(nei)、外壁的(de)涂(tu)敷同時進行。

如外護管是聚乙烯管，無(wu)需再做防腐。聚乙烯無(wu)臭，***，管道保(bao)溫(wen)(wen)(wen)(wen)(wen)工程，手感似蠟，保(bao)溫(wen)(wen)(wen)(wen)(wen)工程施(shi)工，具有(you)(you)優良的耐低溫(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能(低使用溫(wen)(wen)(wen)(wen)(wen)度(du)可(ke)達(da)-70～-100℃)，化(hua)學(xue)穩(wen)定性(xing)(xing)好，能耐大多數酸堿(jian)的侵蝕(shi)(不(bu)耐具有(you)(you)氧(yang)化(hua)性(xing)(xing)質的酸)，常溫(wen)(wen)(wen)(wen)(wen)下不(bu)溶于(yu)一般(ban)溶劑，吸(xi)水(shui)性(xing)(xing)小，但由(you)于(yu)其(qi)為線性(xing)(xing)分(fen)子可(ke)緩慢溶于(yu)某些(xie)，荊門保(bao)溫(wen)(wen)(wen)(wen)(wen)工程，且不(bu)發生溶脹，電(dian)絕(jue)緣性(xing)(xing)能優良。

直埋(mai)(mai)式保溫管(guan)道鋼套(tao)管(guan)的(de)防(fang)(fang)(fang)腐(fu)(fu)蝕(shi)(shi)(shi)(shi)等(deng)(deng)級(ji)(ji)(ji)(ji)(ji)(ji)應(ying)(ying)根據當(dang)地土壤腐(fu)(fu)蝕(shi)(shi)(shi)(shi)性(xing)(xing)等(deng)(deng)級(ji)(ji)(ji)(ji)(ji)(ji)確定(ding)。當(dang)土直埋(mai)(mai)式保溫管(guan)壤的(de)腐(fu)(fu)蝕(shi)(shi)(shi)(shi)性(xing)(xing)等(deng)(deng)級(ji)(ji)(ji)(ji)(ji)(ji)為高時，防(fang)(fang)(fang)腐(fu)(fu)蝕(shi)(shi)(shi)(shi)等(deng)(deng)級(ji)(ji)(ji)(ji)(ji)(ji)應(ying)(ying)考慮(lv)特(te)加強(qiang)級(ji)(ji)(ji)(ji)(ji)(ji)，當(dang)土壤的(de)腐(fu)(fu)蝕(shi)(shi)(shi)(shi)性(xing)(xing)等(deng)(deng)級(ji)(ji)(ji)(ji)(ji)(ji)為中時，防(fang)(fang)(fang)腐(fu)(fu)蝕(shi)(shi)(shi)(shi)等(deng)(deng)級(ji)(ji)(ji)(ji)(ji)(ji)應(ying)(ying)考慮(lv)加強(qiang)級(ji)(ji)(ji)(ji)(ji)(ji)，當(dang)土壤的(de)腐(fu)(fu)蝕(shi)(shi)(shi)(shi)性(xing)(xing)等(deng)(deng)級(ji)(ji)(ji)(ji)(ji)(ji)為低(di)時，防(fang)(fang)(fang)腐(fu)(fu)蝕(shi)(shi)(shi)(shi)等(deng)(deng)級(ji)(ji)(ji)(ji)(ji)(ji)應(ying)(ying)考慮(lv)普通(tong)級(ji)(ji)(ji)(ji)(ji)(ji)。所以(yi)設(she)計時一(yi)定(ding)要搞(gao)清(qing)楚管(guan)線敷設(she)段土壤的(de)腐(fu)(fu)蝕(shi)(shi)(shi)(shi)等(deng)(deng)級(ji)(ji)(ji)(ji)(ji)(ji)，以(yi)便防(fang)(fang)(fang)腐(fu)(fu)等(deng)(deng)級(ji)(ji)(ji)(ji)(ji)(ji)優化(hua)。

直埋(mai)式保(bao)(bao)溫(wen)管道(dao)的陰極保(bao)(bao)護在金(jin)屬(shu)防腐(fu)蝕工藝中(zhong)，是(shi)電(dian)化學保(bao)(bao)護方(fang)法一(yi)種(zhong)。同(tong)其它(ta)直埋(mai)式保(bao)(bao)溫(wen)管防腐(fu)工藝不同(tong)的是(shi)，它(ta)通過給被保(bao)(bao)護金(jin)屬(shu)體施加(jia)電(dian)流，從而使(shi)被保(bao)(bao)護金(jin)屬(shu)體的電(dian)極電(dian)位負移(yi)，設備保(bao)(bao)溫(wen)，使(shi)金(jin)屬(shu)失去了由原子(zi)態自(zi)發(fa)變為離子(zi)態度的趨勢，因而從根本上抑制了腐(fu)蝕的發(fa)生(sheng)。但(dan)這(zhe)個過程必(bi)須在電(dian)解(jie)質(zhi)中(zhong)進行，因此埋(mai)地(di)鋼管道(dao)非(fei)常適(shi)宜采取陰極保(bao)(bao)護。

防(fang)腐保(bao)溫工(gong)(gong)(gong)程在(zai)酷寒(han)的(de)(de)季(ji)候中該怎樣(yang)更好的(de)(de)去(qu)實(shi)行施(shi)工(gong)(gong)(gong)呢?人人曉(xiao)得在(zai)冬天施(shi)工(gong)(gong)(gong)為(wei)了擔(dan)1保(bao)防(fang)腐保(bao)溫工(gong)(gong)(gong)程的(de)(de)施(shi)工(gong)(gong)(gong)品(pin)質(zhi)，施(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)人在(zai)就業的(de)(de)過(guo)程中就必(bi)(bi)須要(yao)格(ge)外(wai)留意各(ge)方面或許(xu)存在(zai)的(de)(de)異常，以防(fang)晚期會(hui)出列(lie)各(ge)種不(bu)(bu)必(bi)(bi)要(yao)的(de)(de)異常.　　1初便是抹面施(shi)工(gong)(gong)(gong)時盡(jin)管(guan)選取正(zheng)午時辰施(shi)工(gong)(gong)(gong)，這(zhe)么很大水(shui)準(zhun)上不(bu)(bu)妨減削溫度顛(dian)簸(bo)的(de)(de)感(gan)化.此外(wai)網格(ge)布匹(pi)(pi)不(bu)(bu)準(zhun)用水(shui)浸(jin)泡為(wei)了防(fang)止出列(lie)網格(ge)布匹(pi)(pi)被(bei)凍壞.

因(yin)氣(qi)溫對比低，發泡膠發泡及固化時(shi)辰(chen)延(yan)接因(yin)而施工時(shi)打(da)磨(mo)(mo)板(ban)縫的(de)時(shi)辰(chen)也應(ying)延(yan)接，這么(me)不(bu)妨防止發泡膠還未固化就(jiu)打(da)磨(mo)(mo)的(de)征(zheng)象產生.膠灰比應(ying)在(zai)劃定界線內利用不(bu)要將材伎(ji)攪拌(ban)過稀(xi)不(bu)然會加長凝集時(shi)辰(chen).

防腐保(bao)溫(wen)工(gong)程在酷寒時(shi)(shi)令(ling)施工(gong)時(shi)(shi)還會遭到不少要(yao)素的(de)(de)感化(hua)，然(ran)而只有咱們嚴格(ge)的(de)(de)尊從(cong)施工(gong)條件(jian)去實行，范例任一步的(de)(de)操(cao)控仍是(shi)會有對比好的(de)(de)成效(xiao)的(de)(de).