隨著經濟的迅速發展,我國的原油儲罐相關行業隨之迅速發展,尤其是大型的原油儲罐得到廣泛的應用。應該如何有效地采取措施保障原油儲備的安全,控制儲罐的腐蝕重中之重。防腐涂層可對儲罐金屬部位和腐蝕介質進行隔離,是儲罐防腐的道防線,能比較有效地防止儲罐被腐蝕。那么涂層的施工質量就變得舉足輕重,直接關系到對腐蝕介質的控制效果,防腐儲罐涂層施工過程中應該注意的環境問題。下面西安大型儲罐廠家給我們具體的詳解(jie)。
1.圍擋(dang)保(bao)護(hu)
一般來(lai)說(shuo),防腐儲罐的工作(zuo)(zuo)基本都是(shi)露天進行施工,所(suo)以風(feng)(feng)沙(sha)(sha)會相對(dui)比較(jiao)大(da),所(suo)以周圍應該設(she)立圍擋,而且要把(ba)涂(tu)(tu)(tu)覆(fu)作(zuo)(zuo)業的位置設(she)在上風(feng)(feng)口,下風(feng)(feng)口設(she)噴砂(sha)作(zuo)(zuo)業,這樣可以減少風(feng)(feng)沙(sha)(sha)的影(ying)響(xiang)。涂(tu)(tu)(tu)料(liao)涂(tu)(tu)(tu)覆(fu)區(qu)和噴砂(sha)作(zuo)(zuo)業的時(shi)間(jian)應該相互錯開,以免(mian)噴砂(sha)作(zuo)(zuo)業影(ying)響(xiang)涂(tu)(tu)(tu)刷的質量。
2.罐內作業要通風
在(zai)罐內進(jin)行施工作業(ye)時,應保持通風,如果通風較(jiao)差(cha),那么要采取強制通風措(cuo)施。
3.溫(wen)度(du)的控制
涂刷作(zuo)業時鋼表面(mian)溫(wen)度(du)(du)(du)應該(gai)高出(chu)現場露點(dian)溫(wen)度(du)(du)(du)3℃,而且不(bu)得高于50℃。通常夏天(tian)室外作(zuo)業鋼板溫(wen)度(du)(du)(du)都會(hui)有超過50℃的情(qing)況,如果鋼表面(mian)溫(wen)度(du)(du)(du)過高,就會(hui)出(chu)現漆(qi)膜鼓(gu)起氣泡,導致附(fu)著(zhu)力降低,如果溫(wen)度(du)(du)(du)過低,常規的涂料容易是漆(qi)膜被凍結(jie),不(bu)易固化(hua)。
4.濕度方面的影響(xiang)
在(zai)空氣(qi)濕(shi)度大于85%或雨(yu)、雪、或大霧等天氣(qi)時(shi)不(bu)得進行施(shi)工作業(ye)。涂刷(shua)時(shi)鋼的表面不(bu)要有露珠。
施工工藝
鋼(gang)結(jie)構屋面(墻面、室內)除銹(xiu)防(fang)腐(fu)施工工藝(yi):除銹(xiu)→清洗→防(fang)腐(fu)底漆(qi)涂刷(噴(pen)(pen)涂)→檢(jian)查(cha)補涂→防(fang)腐(fu)面漆(qi)涂刷(噴(pen)(pen)涂)→防(fang)腐(fu)面漆(qi)涂刷(噴(pen)(pen)涂)
1.除(chu)(chu)(chu)銹(xiu)(xiu)(xiu)工藝(yi)要(yao)(yao)求(qiu):基(ji)層(ceng)清理(li)徹底,采用專用設備進(jin)行打磨除(chu)(chu)(chu)銹(xiu)(xiu)(xiu)或噴(pen)(pen)砂除(chu)(chu)(chu)銹(xiu)(xiu)(xiu),除(chu)(chu)(chu)銹(xiu)(xiu)(xiu)后(hou)基(ji)層(ceng)不得(de)有銹(xiu)(xiu)(xiu)蝕斑(ban)點存在,油污、油脂,沙塵、鐵砂及金(jin)屬(shu)氧(yang)化物等(deng)清理(li)干(gan)(gan)凈。除(chu)(chu)(chu)銹(xiu)(xiu)(xiu)后(hou)、在六小時內噴(pen)(pen)底涂進(jin)行防腐處理(li),進(jin)行噴(pen)(pen)涂工序(xu)前(qian)(qian),如遇下雨或其他造成(cheng)基(ji)體鋼材(cai)表面(mian)(mian)潮濕的(de)(de)(de)情況(kuang)時,要(yao)(yao)待環境達(da)到施工條件后(hou),用干(gan)(gan)燥(zao)的(de)(de)(de)壓縮空氣(qi)吹干(gan)(gan)表面(mian)(mian)水分(fen)后(hou)除(chu)(chu)(chu)銹(xiu)(xiu)(xiu);除(chu)(chu)(chu)銹(xiu)(xiu)(xiu)后(hou)的(de)(de)(de)鋼材(cai)表面(mian)(mian)達(da)到除(chu)(chu)(chu)銹(xiu)(xiu)(xiu)等(deng)級Sa2。5,表面(mian)(mian)用毛刷等(deng)工具清掃干(gan)(gan)凈,才(cai)能(neng)進(jin)行下道(dao)工序(xu),除(chu)(chu)(chu)銹(xiu)(xiu)(xiu)合格后(hou)的(de)(de)(de)鋼材(cai)表面(mian)(mian)呈現(xian)金(jin)屬(shu)光澤,每平方米金(jin)屬(shu)表面(mian)(mian)銹(xiu)(xiu)(xiu)斑(ban)和油漆(qi)不得(de)大(da)于5%,如在底涂前(qian)(qian)已返銹(xiu)(xiu)(xiu),重新打磨除(chu)(chu)(chu)銹(xiu)(xiu)(xiu)或噴(pen)(pen)砂除(chu)(chu)(chu)銹(xiu)(xiu)(xiu),不可(ke)降低(di)磨料(liao)要(yao)(yao)求(qiu),以免降低(di)粗糙度(du)。
2.清(qing)(qing)洗(xi)工藝要求(qiu):采用高(gao)壓清(qing)(qing)洗(xi)設(she)備(bei),基層表(biao)面(mian)清(qing)(qing)理潔凈,對基層縫隙、凹(ao)凸(tu)部(bu)位、隱蔽(bi)角落清(qing)(qing)洗(xi)徹底(di)。基面(mian)要求(qiu)牢固、平(ping)整,對于凹(ao)凸(tu)不(bu)(bu)平(ping)或有裂紋的(de)部(bu)位進行加固處理后再施工;基面(mian)清(qing)(qing)除干(gan)凈徹底(di),不(bu)(bu)得有泥(ni)土污垢、浮塵、雜(za)物、明水(shui)、油污或疏松(song)物等雜(za)質等,并(bing)隨時注意保持基面(mian)清(qing)(qing)潔衛(wei)生(sheng)。
3.防腐底漆工(gong)(gong)(gong)藝要(yao)求:施(shi)(shi)工(gong)(gong)(gong)前(qian),保(bao)(bao)持基面(mian)無(wu)(wu)(wu)浮(fu)銹、無(wu)(wu)(wu)濕跡、積水、潔凈,不得在(zai)陰雨(yu)天(tian)氣情況下進(jin)行(xing)施(shi)(shi)工(gong)(gong)(gong)。采用(yong)(yong)高壓噴涂專用(yong)(yong)設備進(jin)行(xing)施(shi)(shi)工(gong)(gong)(gong),施(shi)(shi)工(gong)(gong)(gong)材(cai)料無(wu)(wu)(wu)沉淀,經過嚴格檢(jian)驗,包(bao)裝桶(tong)開蓋后盡(jin)量當(dang)天(tian)使用(yong)(yong)完(wan)畢;噴涂材(cai)料在(zai)使用(yong)(yong)之前(qian),使用(yong)(yong)專用(yong)(yong)碾磨機進(jin)行(xing)均勻攪(jiao)拌,保(bao)(bao)證施(shi)(shi)工(gong)(gong)(gong)過程中高壓噴涂專用(yong)(yong)設備無(wu)(wu)(wu)堵塞現(xian)象發生,噴涂過程均勻、無(wu)(wu)(wu)堆(dui)積、無(wu)(wu)(wu)遺漏。
4.檢查補漆:針對角(jiao)(jiao)(jiao)落、邊縫處、水平搭接(jie)(jie)、垂直搭接(jie)(jie)、風機口(kou)、伸出屋面管道、空調管道、金屬(shu)板(ban)與女兒墻(qiang)交接(jie)(jie)處、螺釘固件(墻(qiang)面邊角(jiao)(jiao)(jiao)、C型鋼(gang)、H鋼(gang)、線槽、天花板(ban)吊桿、管道)等(deng)其他(ta)金屬(shu)屋面(墻(qiang)面、室內)防腐薄(bo)弱環節進行(xing)仔細檢查,確(que)定邊縫角(jiao)(jiao)(jiao)全部噴涂到位(wei)。
5.防腐面(mian)漆(qi)(qi)工(gong)(gong)藝要求:在底(di)漆(qi)(qi)表干實(shi)干之后方可進(jin)(jin)行(xing)(xing)面(mian)漆(qi)(qi)施(shi)工(gong)(gong),采用高壓噴(pen)涂(tu)專用設備(bei)進(jin)(jin)行(xing)(xing)施(shi)工(gong)(gong),施(shi)工(gong)(gong)后的防腐涂(tu)層應薄厚均勻,符合設計要求;不允(yun)許有脫落,堆積(ji)裂紋(wen)、翹邊、鼓(gu)泡、分層,收頭不嚴(yan)密等缺(que)陷。施(shi)工(gong)(gong)保證基(ji)層整體無縫全面(mian)覆蓋,工(gong)(gong)程完成后進(jin)(jin)入養護期,禁(jin)止任(ren)何人進(jin)(jin)入施(shi)工(gong)(gong)現場。