
罐體做保溫使用巖棉需注意什么事項
1.需保溫的設施(shi)以及管(guan)道應沒有任何泄漏,表面干燥,無油脂,無銹蝕在桔柑些條件(jian)下,為(wei)利于(yu)防(fang)腐,可(ke)采取適(shi)當涂層。
2.為了能夠達到(dao)熱(re)損失小目的(de),板和氈的(de)所有(you)接頭一定要對(dui)接十分緊(jin)密,在多層保溫時各個十字接縫(feng)應該交(jiao)錯開來,以免形成熱(re)橋(qiao),在保冷(leng)時必需杜絕冷(leng)橋(qiao)。
3.巖棉制品用于室(shi)外保溫或(huo)者在(zai)易受機械磨損的地(di)方宜用金(jin)屬或(huo)塑(su)料包(bao)皮,并(bing)注意接(jie)頭,接(jie)縫的密封,必要時加(jia)膠質封條,包(bao)裹層(ceng)重疊部分不小于100mm 。
4.用于保(bao)冷(leng)一定要在(zai)保(bao)冷(leng)面加(jia)防(fang)(fang)潮層,在(zai)溫度特別低(di)的情況下,用不含樹脂的巖(yan)棉進(jin)行絕(jue)熱(re),其(qi)防(fang)(fang)潮層也(ye)必須是(shi)防(fang)(fang)火的。
5.當溫度超過200℃ 時,保溫必須加(jia)合適的外護,這樣可能產生的膨脹就不會使厚度和容(rong)重發(fa)生變化。
6.對(dui)于大直徑或平壁設備用巖棉制品(pin)保溫,超過200℃ 時應(ying)加保溫釘,(間(jian)距400mm )外護要貼緊。
7.當保溫對象垂直放置,具有相當高(gao)度時,其保溫層一(yi)定(ding)(ding)要有定(ding)(ding)位銷或(huo)支承(cheng)環,間距不要大于3 米,以防保溫材料在有震動(dong)時向(xiang)下(xia)滑動(dong)。
8.室外保溫,保冷施工不(bu)宜在雨天進行,否則應采取防雨措施。
若是馬虎對待巖棉保(bao)溫板(ban)的施工,那(nei)么很可能(neng)會導致使用巖棉卻達不到效(xiao)果。
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