不銹鋼施工方案-全文預(yù)覽
【正文】 verifying, report for checking, and carry out the positioning welding. Positioning welding and welding. First the welding seam should be dressed to sweep away the dirt, grease and dust. And then clean with acetone or alcohol. After that the positioning welding between the deck framing and the deck should be carried out. The order of the welding is: for transverse web, from the middle to the two sides。酸洗 酸洗是最常用去除氧化物和鐵污染的化學(xué)方法，酸洗后必須用干凈的水噴射，含有氯的水能夠改善材料的表面狀況。自動焊接時(shí)需在鐵軌道與不銹鋼板之間墊橡膠。對于必須吊放于分段上施工的設(shè)備，必須采取相應(yīng)的措施來保證設(shè)備碳鋼部分與不銹鋼不直接接觸，如設(shè)備下墊放木板、橡膠、阻燃塑料等。（三）大合攏分段合攏時(shí)，施工區(qū)設(shè)能防風(fēng)雨、防潮和寒冷的施工蓬。不銹鋼產(chǎn)生變形不得用熱加工矯正，不得用鐵錘敲擊。翻身后應(yīng)將不銹鋼甲板內(nèi)側(cè)面正放在裝有不銹鋼墊塊水平胎架或有尺寸為130130mm若干塊水平墊木上，落位后，應(yīng)整體做施焊前定位焊肉打磨，焊段兩端打磨成圓弧狀。檢驗(yàn)無誤后報(bào)檢，進(jìn)行定位焊。（二）不銹鋼甲板與甲板分段合攏甲板分段與不銹鋼甲板合攏前進(jìn)行打磨。1焊接時(shí)使用的工具（焊渣錘、刷子、撮箕）應(yīng)為不銹鋼，包括焊縫除漆用的工具。施工中分段的吊運(yùn)不得隨意從不銹鋼分段上方經(jīng)過。不允許隨意將工具、設(shè)備放在不銹鋼板上，不可在不銹鋼板上任意拖拉龍頭線。根據(jù)圖紙劃出甲板中心線、肋骨檢驗(yàn)線和各構(gòu)架的位置線，報(bào)檢。為了防止焊接時(shí)不銹鋼板變形，板的上面用壓塊固定在胎架上，壓塊與不銹鋼板接觸的部分墊膠皮保護(hù)。按拼板圖的要求，將不銹鋼板鋪放在胎架上，準(zhǔn)確落位，以免劃傷不銹鋼甲板，并核對鋼板號料時(shí)所標(biāo)注的符號、首尾方向、肋骨號等。兩層不銹鋼板不可重疊放置，否則中間要放軟物或木條鋪墊。吊運(yùn)時(shí)不可在一塊不銹鋼板上任意拖拉另一塊不銹鋼板，以免劃傷不銹鋼板表面。因此，對于不銹鋼材料應(yīng)高度重視表面的保護(hù)，特別是液貨艙內(nèi)表面的保護(hù)。此外，滲碳也會降低不銹鋼的耐腐蝕性。應(yīng)采用適當(dāng)數(shù)量的吊鼻，避免調(diào)運(yùn)時(shí)不銹鋼變形。堆放過程中應(yīng)用木材或非金屬物質(zhì)做墊料，在貯存期間不銹鋼應(yīng)用塑料密封，再加帆布蓋上。不銹鋼液貨艙拼板施工在車間進(jìn)行，不得在不銹鋼拼板施工現(xiàn)場附近進(jìn)行碳鋼的打磨、切割等工作。定位，定位時(shí)先定位中間和兩端，然后再加密定位焊，定位焊的尺寸為75 mm 300mm，從中間向兩舷定位。焊接，甲板拼板用埋弧焊焊接，需在鐵軌道與不銹鋼板之間墊橡膠，避免與不銹鋼接觸。施工人員在不銹鋼施工區(qū)域施工時(shí)要穿清潔鞋套，隨身不能攜帶金屬物件，如鑰匙、手表等。用于不銹鋼的工具不能與制造碳鋼的混用。不銹鋼產(chǎn)生變形不得用熱加工矯正，不得用鐵錘敲擊。（用砂輪粗磨后，拋光機(jī)拋光）。甲板要準(zhǔn)確落位，以免劃傷不銹鋼甲板。檢驗(yàn)無誤后報(bào)檢，進(jìn)行整體翻身，吊裝操作同上。在整個(gè)操作過程中，不可用鐵錘敲打不銹鋼表面。（用砂輪粗磨后，拋光機(jī)拋光）。在液貨艙內(nèi)施工時(shí)，底面需鋪設(shè)木板或草席進(jìn)行保護(hù)，避免東西墜落損傷表面。焊接時(shí)使用的工具（焊渣錘、刷子、撮箕）應(yīng)為不銹鋼，包括焊縫除漆用的工具。合攏焊接完檢查焊縫是否有缺陷，并采用相應(yīng)的措施去除缺陷（見不銹鋼焊接缺陷修補(bǔ)工藝）。 for deck longitudinal girder, stringer, from the middle to the two ends. The dimension of the welding is 75 mm 300mm. The welding should be carried out from the middle to the sides or ends at the same time. After the positioning welding, measure again the surrounding dimensions, parallelism, verticality, frame distance and stringer distance, and so on. All the dimensions should meet the requirements. After verifying, report for checking. Turn over the blocks entirely, the operation for vertical load is the same as the mentioned above. After turning over, the inner side of the deck should be rightly located on the stainless steel rig or some horizontal wood filling blocks dimensioned 130130mm. After location, dressing should be carried out, the ends of the welding parts should be made to have round shape. There should be double welding workers to carry out the welding, the order of the welding is same as the positioning welding. The method of the welding should be carbon dioxide welding. The temporary stiffer members and supports for the blocks should be linked to the stainless steel plates with stainless steel plates. No hit on the
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