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儲(chǔ)罐安裝、焊接施工方案(編輯修改稿)

2024-12-16 18:36 本頁(yè)面
 

【文章內(nèi)容簡(jiǎn)介】 小于 200mm; The distance between longitudinal weld joint of bottom shell and butt weld joint of tank bottom baseplate is not less than 200mm。 罐壁開(kāi)孔接管或開(kāi)孔接管補(bǔ)強(qiáng)板外緣與罐壁縱向焊縫之間的距離不得小于200mm,與環(huán)向焊縫之間的距離不得小于 100mm; The distance between tank wall open pipe and open reinforcement plate outer edge and tank wall longitudinal weld is not less than 100mm。 包邊角鋼對(duì)接接頭與壁板縱向焊縫之間的距離不得小于 200mm; The distance between angle iron butt weld joint and shell longitudinal weld joint is not less than 200mm。 壁板尺寸允許偏差應(yīng)符合下表規(guī)定: Allowance deviation of shell size shall accord with following specification: 測(cè)量部位 Measure position 環(huán)縫對(duì)接 Circumferential joints butt welding (mm) 板長(zhǎng) Plate length AB (CD≥ 10m) 板長(zhǎng) Plate length AB (CD10m) 寬 度 Width 177。 177。 1 長(zhǎng) 度 Length 177。 2 177。 對(duì)角線之差 Diagonal difference |ADBC| ≤ 3 ≤ 2 直線度 Alignment ≤ 1 ≤ 1 ≤ 2 ≤ 2 壁板在卷板機(jī)上進(jìn)行卷制,輥的軸線與壁板長(zhǎng)邊相互垂直。為了防止產(chǎn)生直板可加帶頭板。壁板卷制后應(yīng)立置在平臺(tái)上檢查,垂直方向用直線樣板檢查間隙不得大于 1mm,水平方向用弧形樣板,其間隙不得大于 4mm; Shell plate shall upright lie on the platform to check with templet. For the vertical to check with straight templet and its gap is less than 1mm. For the level to check with arc templet and its gap is less than 4mm。 壁板坡口用坡口機(jī)加工,縱縫坡口尺寸按圖紙要求進(jìn)行,環(huán)縫開(kāi)單面 V 坡口。 C A B D F E 上海 SECCO90 萬(wàn)噸 /年乙烯工程 26 萬(wàn)噸 /年丙烯腈 (AN)裝置 儲(chǔ)罐安裝 \焊接施工方案 中國(guó)石化集團(tuán)第五建設(shè)公司 Page 9 of 34 上海工程項(xiàng)目部 Edge preparation of shell plate adopts edge planner and the actual size shall accord with the design requirements. 拱頂預(yù)制 Prefabrication of domed roof 拱頂預(yù)制前依據(jù)施工拱頂圖繪制排板圖且符合下列規(guī)定: Draw typesetting sketches of domed roof accord with construction domed roof drawing before fabrication the domed roof and conform to following provision: 頂板任意兩條相鄰焊縫的間距不得小于 200mm; Distance between every two conterminous weld joint on domed roof is not less than 200mm。 瓜皮板自身拼接采用對(duì)接接頭,并采用雙面焊接; Weld of domed roof plates adopts butt weld. When assemble with many pieces of plates according to specification of material delivered, domed roof plates shall be formed on platform and adopts bothside welding, plates shall be smooth after welding. 瓜皮板下料前按施工圖放大樣,確認(rèn)無(wú)誤后方可切割; Confirm domed roof plates and cut they according to amplified construction sample drawing before construction。 拱頂加強(qiáng)肋,應(yīng)進(jìn)行冷煨加工,成型后用弧形樣板檢查,其間隙不得大于 2mm; Domed roof reinforce rib shall cold roast and check with arc templet after formation, its gap is less than 2mm。 加強(qiáng)肋接頭部位必須完全焊透; Reinforce rib tie shall be perative welded。 加強(qiáng)肋與頂板組焊應(yīng)在拱頂支架上進(jìn)行,并按圖樣要求,先放置徑向加強(qiáng)肋,后放置環(huán)向加強(qiáng)肋。 Weld of reinforce rib and top plate shall be on mould and meet drawing requirements. Lay radial reinforce rib firstly, then connect ringed reinforce rib, rib and top plate shall be tight. 瓜皮板預(yù)制成型后,用弧形樣板檢查,其間距不得大于 10mm; Check the domed roof plate with arc templet after formation and its gap is less than 10mm。 6. 安 裝 Installation 采用目前國(guó)內(nèi)較先進(jìn)的液壓頂升倒裝法施工工藝,在罐內(nèi)沿圓周設(shè)置提升架,用托架將罐體、罐壁脹圈與液壓頂升機(jī)連接在一起,在罐內(nèi)設(shè)液壓泵站,用膠管通過(guò)液壓元件把各液壓頂升裝置連起來(lái),在高壓油的作用下將罐體升起。此工藝優(yōu)點(diǎn)是:工序簡(jiǎn)單 ,操作穩(wěn)定可靠,高空作業(yè)少施工安全性能好,腳手架搭設(shè)少能明顯提高工效,確保施工質(zhì)量。底板、壁板和頂板用 50 噸履帶式吊車(chē)吊裝。 Adopt advance hydraulic pressure lift adverse installation process and placidly lift storage tanks with hydraulic pressure lift machine. Merits of this process are: procedure is simple。 operation is steady and reliable。 construction is safe。 effect is clearly increased。 quality is insured. 底板組裝 Assemble of tank bottom 底板鋪設(shè)前,其下表面應(yīng)設(shè)計(jì)文件要求進(jìn)行刷油防腐,不銹鋼不刷油。 上海 SECCO90 萬(wàn)噸 /年乙烯工程 26 萬(wàn)噸 /年丙烯腈 (AN)裝置 儲(chǔ)罐安裝 \焊接施工方案 中國(guó)石化集團(tuán)第五建設(shè)公司 Page 10 of 34 上海工程項(xiàng)目部 Before laying carbon tank soleplate, its underside shall paint according to design requirements, and not paint in 40mm from each edge. 在基礎(chǔ)上劃出兩條互相垂直的中心線,并且劃出每塊中幅板的位置,這樣有利于鋪設(shè); 先鋪罐底中心板,在中心板上劃十字線,十字線與罐基礎(chǔ)中心線重合,在十字線中心打上樣沖眼,并應(yīng)做出明顯的十字標(biāo)記; Draw reticle on tank bottom center plate according to typeset chart, the reticle and tank foundation centerline overlaps. Drilling in tank center and marking. 由罐底中心板向兩端逐塊鋪設(shè)中間一行中幅板,然后從中間一行板開(kāi)始,向兩側(cè)逐行鋪設(shè)中幅板,每行中幅板應(yīng)由中間向兩側(cè)依次鋪設(shè);中幅板搭接長(zhǎng)縫可點(diǎn)焊或用角鋼斜鐵固定, 每塊板不少于 2 處。三層板重疊處,將上層板覆蓋的角焊縫先焊接完畢,上層板應(yīng)切角處理,具體尺寸見(jiàn)各施工圖。 Lay channel plate from tank bottom center plate to both side. Welded before the third plate laid. 鋪設(shè)時(shí),宜先鋪設(shè)中幅板,后鋪設(shè)邊緣板。中幅板與中幅板搭接,中幅板與邊緣板搭接,應(yīng)按圖紙要求進(jìn)行搭接,搭度允差為177。 5mm。 Lay channel plate firstly, then lay edge plate. If soleplate require join connection, connect according to the requirement, allowance deviation is177。 5mm。 邊緣板鋪設(shè)前背面相同一側(cè)點(diǎn)焊墊板,墊板規(guī)格與材質(zhì)依據(jù)圖紙要求。 Spotwelding the cushion plate on the same side of edge plate. 弓形板邊緣板的對(duì)接接頭采用不等間隙,外側(cè)間隙為 e1=4~5mm,內(nèi)側(cè)間隙為e2=7~8mm; Butt connection of arc rim plate adopt unequal gap, outer gap is e1=4~5mm,inner gap is e2=7~8mm。 壁板組裝 Assemble of shell 在罐底上以罐底中心板十字線中心為圓心,劃出底圈壁板安裝圓,在內(nèi)徑處焊上定位角鐵,將十字線延長(zhǎng)到邊緣板上。 Draw top shell installation circle on tank bottom, center is tank center, radius accord with following: 最上二(三)帶板施工完,在罐內(nèi)安裝液壓頂升裝置。 After the top shell assembly and vault, assembly Hydraulic pressure lift machine in 180186。 南 S 270186。 西 W 90186。 東 E 0186。 北 N e1 e2 上海 SECCO90 萬(wàn)噸 /年乙烯工程 26 萬(wàn)噸 /年丙烯腈 (AN)裝置 儲(chǔ)罐安裝 \焊接施工方案 中國(guó)石化集團(tuán)第五建設(shè)公司 Page 11 of 34 上海工程項(xiàng)目部 tanks. 起重重量(最大起重重量)計(jì)算: Calculation of lifting weight: T=K*(罐體總重-罐底重量-第 1 層壁板重量 +附件重量 ) T=K*( total tank weight- tank bottom weight- 1st layer shell weight + appurtenance weight) 附件重量?、?5000Kg(容積大于等于 3000m3);② 3000Kg(容積小于 3000m3)。K 取 (安全系數(shù)) appurtenance weight approximately 4000Kg, K approximately ( Safety coefficient) 名 稱 Name 位 號(hào) Item 全容積Specification( m3) 規(guī) 格 Type( mm) 提升重量 Lifting weight( t) 頂升機(jī)數(shù)量Number of lift machine( set) 丙烯腈成品中間罐An product rundow
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