【導讀】名稱Name位號Item全容積Cubage規(guī)格Specification材質Material總重/臺GrossWeight/Set數(shù)量Number. 采用液壓頂升倒裝法安裝。與不銹鋼板接觸的碳鋼工具、夾具要在接觸處放置一塊同材質的不銹鋼板。的耐蝕性，同時還具有無磁性。其力學性能特點是塑性、韌性好，但強度、硬度。由于奧氏體不銹鋼的導熱系數(shù)小，僅為碳鋼的1/3，而且線膨脹系數(shù)大，比。碳鋼大40%以上，所以焊接時容易變形。焊接時應采用較小的焊接電流，大的焊。接速度，短弧焊，多層焊時，待先焊一層完全冷卻后再焊下一層。

　　

【正文】 joint, and cut the excessive shell according to the size, then seal it and weld external longitudinal joint。Circumferential joint shall weld the external firstly, then weld the internal。 ④將脹圈拆下移到下圈壁板上； Take down the expand ring and move it to the lower shell。 ⑤按以上程序組裝其余各圈壁板； Assemble other shells according to following procedure。 ⑥底圈壁板組裝應符合下列規(guī)定： 2mm，在整個圓周上任意兩點水平的允許偏差不應大于 6mm； 3mm； ，在底圈壁板 1m 高處，內表面任意點半徑的允許偏差 儲罐直徑 m 半徑允許偏差 mm D≤ 177。 13 ＜ D≤ 45 177。 19 其余壁板的鉛垂允許偏差，不應大于該圈板高度的 %； Allowance vertical deviation of shell is less than % of the height of the plate。 ⑦壁板組裝時應保證內表面平齊，錯邊量符合下列規(guī)定： Inner surface of shell shall be smooth and the lap conform to following specify: ： 當板厚小于或等于 10mm 時，不應大于 1mm；當板厚大于10mm 時，不應大于板厚的 1/10，且不應大于 ； Lap of longitudinal joint: for plate thickness is up to 10mm, it is less than 1mm。for thickness is more than 10mm, it is not more than 1/10 of plate thickness and is not more than 。 ：當上 圈壁板厚度小于 8mm 時，任何一點的錯邊量均不得大于 ；當上圈壁板厚度大于或等于 8mm 時，任何一點的錯邊量均不得大于板厚的 2/10，且不應大于 3mm； Lap of circumferential joint: when thickness of upper shell is less than 8mm,lap of every point is not more than 。when thickness of upper shell is equal or more than 8mm,lap of every point is not more than 2/10 of plate thickness and is not more than 3mm。 組裝焊接后，焊縫的角變形用 1m 長的弧形樣板檢查，符合下表規(guī)定： Check the angle distortion with 1m long arc templet according to following specify after assembly and weld: 罐壁焊縫的角變形 Angle distortion of tank wall joint 板厚 Plate thickness (mm) 角變形 Angular distortion (mm) δ≤ 12 ≤ 10 上海 SECCO90 萬噸 /年乙烯工程 26 萬噸 /年丙烯腈 (AN)裝置 儲罐安裝 \焊接施工方案 中國石化集團第五建設公司 Page 15 of 34 上海工程項目部 12＜δ≤ 25 ≤ 8 組裝焊接后，罐壁局部凹凸變形應平緩，不得有突然起伏，且應符合下表規(guī)定： After assembly and weld, local concavoconvex distortion of tank wall shall be smooth and slow, have no wave and conform to following specify: 罐壁的局部凹凸變形 local concavoconvex distortion of tank wall 板 厚 Plate thickness (mm) 罐壁局部凹凸變形 Local concavoconvex distortion of tank wall δ≤ 25 ≤ 13 頂板安裝 Assemble of domed roof 安裝完一帶壁板后，安裝拱頂，組裝前應對預制的頂板及頂圈壁板進行復驗，合格后方可組裝； After assembly the top shells, assembly top plate, recheck the fabricated top plate and top shell before assemble the domed roof, assemble it according to typeset chart numbers after check and prove to be qualified。 瓜皮板與瓜皮板之間采用搭接，搭接量依據圖紙，允許偏差為177。 5mm； Between the domed roof plates are lap joint, it’s 50mm, Allowance is 177。 5mm； 在罐內設置組裝拱頂?shù)闹行闹?，中心柱上焊接一中心蓋板的圓環(huán)托架，直徑比中心蓋板大。臨時支架用煨彎的槽鋼組成，下面用多根立柱支撐在底板上，立柱相互連接起來形成一個整體以增加穩(wěn)定性。拱頂高度比設計值高出5080mm； Set up temporary support for assembling domed roof in tank, height of domed roof shall be 5080mm taller than design value。 在包邊角鋼和臨時支架上，應劃出每塊拱頂板的位置線 。 Draw the position line of domed roof plate on envelope angle steel. 拱頂先組裝軸線對稱位置四塊瓜皮板，再組裝其余瓜皮板，并調整搭接寬度，調整后定位焊，頂板焊縫要避開罐頂?shù)拈_口如：透光孔、量油孔等。 頂板焊接順序： Assemble 4 domed roof plates on the position where axes is symmetrical when assembling domed roof, and adjust them and tack weld them, then assemble other domed roof plates and lap width, allowance deviation of lap width is 177。 5mm， weld domed roof internal interrupted joint and costal plate continuous joint。 拱頂安裝后提升前將透光孔、量油孔、泡沫發(fā)生器、盤梯支架及防護欄桿等安裝完畢； Install domed roof center cap plate ,gage hatch, foam generator and guard rail, etc.。 頂板焊接成形后，用弧形樣板檢查，間隙不得大于 15mm； Check the cap plate with arc templet after welding and formation and the gap is less than 15mm。 附件安裝 Assembly of appurtenances 在儲罐安裝過程中，及時安裝盤梯支架； During the course of assembly shell, we install winding stair and bracket in time. 內側間斷焊 縫 肋板的連接焊縫 外側連續(xù)焊縫 Discontinuous welding line of inside Welding line of costal plate Discontinuous welding line of outside 上海 SECCO90 萬噸 /年乙烯工程 26 萬噸 /年丙烯腈 (AN)裝置 儲罐安裝 \焊接施工方案 中國石化集團第五建設公司 Page 16 of 34 上海工程項目部 罐壁開口位置偏差為 10mm，接管伸出長度允差為 177。 5mm。補強板厚度與曲率半徑與開口處相同，并開信號孔。焊完后做氣密試驗，由信號孔通入 100～200Kpa 的壓縮空氣，用肥皂水檢查，無泄露為合格。 Allowance of shell hatch position is 10mm， Allowance of extended pipe is 177。 5mm. The thickness and curvature radius of strength pensation are the same of hatch position. Drill M10 on reinforcing pad, after welding, gas test by 100～ 200Kpa press air. 加強圈所在的一圈壁板縱縫焊接完，檢查合格后，下一圈壁板安裝前進行。 After welding the shell before assembly next shell, should assembly stiffening head. 頂圈壁板安裝合格后，安裝包邊角鋼包邊角鋼在組裝前應檢查弧度和翹曲度； After install the top shell, install angle steel ring , check arc and camber of the angle steel ring before assemble it。 ，并畫出每段角鋼位置線，包邊角鋼對接焊縫與罐壁縱縫相距 300mm 以上。 Draw position line of angle steel ring on top shell, the distance of envelope angle steel butt weld joint and longitudinal weld of shell must more than 300mm. ，應先焊角鋼 對接縫，再焊內側間斷焊縫，最后焊外側連續(xù)角焊縫； Weld between angle steel ring and shell shall be angle weld, weld angle steel butt joint, weld internal interrupted angle weld joint secondly, then weld external continuous angle weld joint。 177。 4mm； 包邊角鋼應緊貼壁板頂部，其間隙 不應大于 2mm； Allowance deviation of the section that angle steel ring taller than shell is 177。 4mm, angle steel ring shall be closely connected with shell and the gap is less than 2mm。 ，采用全焊接的對接接頭； Joint between angle steel ring shall be overall butt weld joint。 7. 焊 接 Welding 焊工要求 welding require 嚴格按照本施工方案及焊接工藝卡進行施工。 Must according to this construction technical project and welding process sheets. 參加施工的焊工必須有相應項目的合格證書，不得有超出合格項目的焊接。 The welders must have corresponding eligible certificate. 領取焊條時，必須用焊條保溫筒； Welder shall take heat insulation canister. 焊縫編號如下 Welding line number as following 焊縫編號： xxx —— xxx —— xxx 位號 Item 焊口號 Welding line 焊工號 NO. of welder r 上海 SECCO90 萬噸 /年乙烯工程 26 萬噸 /年丙烯腈 (AN)裝置 儲罐安裝 \焊接施工方案 中國石化集團第五建設公司