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西安不銹鋼管道拆除及施工方案

日期:2024-11-24 23:36
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摘要:<span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">西安不銹鋼管道拆除及施工方案</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">西安不銹鋼管道拆除施工方案</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> 1</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">、</span></span><span style="font-family:'Times New Roman';font-size:small;"> </span><span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">不銹鋼管道舊管線的拆除,采用等離子切割機先將管道割斷,然后由人工將管道拆除,若口徑大于</span><span style="font-family:'Times New Roman';"><span lang="EN-US">DN200</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">的管道,可采用手拉葫蘆協助吊卸。</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> 2</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">、</span></span><span style="font-family:'Times New Roman';font-size:small;"> </span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">拆卸下的管道,應及時將其清理出場,否則,新管道將無場地進行預制工作。</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> 3</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">、</span></span><span style="font-family:'Times New Roman';font-size:small;"> </span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">新管道預制時,將管道在地面按原管線走向一字排開,預制時,應根據現場實際情況定位。</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> 4</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">、</span></span><span style="font-family:'Times New Roman';font-size:small;"> </span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">供安裝的不銹鋼管及管件應具有制造廠的合格證書,化學成分和機械性能等資料,并經熱處理和晶間腐蝕實驗。管子及管件在使用前進行外觀檢查,表面不得有裂縫、重皮等缺陷。</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> 5</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">、</span></span><span style="font-family:'Times New Roman';font-size:small;"> </span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">管子安裝前應進行一般清洗,除去油污及其他污物。</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> 6</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">、</span></span><span style="font-family:'Times New Roman';font-size:small;"> </span><span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">不銹鋼管嚴禁使用氧</span><span style="font-family:'Times New Roman';"><span lang="EN-US">-</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">乙炔割刀,應采用鋸床、手鋸、砂輪切割機、等離子切割機等進行管道切割,砂輪片應選用專用砂輪片。</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> 7</span></span><span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、</span><span style="font-family:'Times New Roman';"><span lang="EN-US"> 18-8</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">不銹鋼管采用焊接連接,配件采用壓制件,由于</span><span style="font-family:'Times New Roman';"><span lang="EN-US">18-8</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">不銹鋼為奧氏體不銹鋼,采用的焊接方式為手工氬弧焊。選用的焊條及焊絲規格為:焊條牌號</span><span style="font-family:'Times New Roman';"><span lang="EN-US">A132</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">,焊絲鋼號</span></span><span style="font-family:'Times New Roman';"><span lang="EN-US"><span style="font-size:small;">H0Cr20Ni10Ti<br /> </span><span style="font-size:small;"> 8</span></span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">、</span></span><span style="font-family:'Times New Roman';font-size:small;"> </span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">管道應在支架固定好后安裝,管子不得與碳鋼支架直接接觸,應在管道與支架之間墊入不銹鋼片、不含氯離子的塑料片和橡膠板。</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> 9</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">、</span></span><span style="font-family:'Times New Roman';font-size:small;"> </span><span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">根據輸送介質和工作溫度的不同,法蘭墊片應按規范要求選用非金屬墊片或金屬墊片,非金屬墊片的氯離子含量不得超過</span><span style="font-family:'Times New Roman';"><span lang="EN-US">50*10-6</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">。</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> 10</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">、</span></span><span style="font-family:'Times New Roman';font-size:small;"> </span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">不銹鋼管道管路較長或輸送介質溫度較高時,管路上應設補償器。</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> 11</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">、</span></span><span style="font-family:'Times New Roman';font-size:small;"> </span><span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">管道安裝完畢后,應按設計或規范要求進行試壓,采取水壓試驗時水的氯離子含量不得超過</span><span style="font-family:'Times New Roman';"><span lang="EN-US">25*10-6</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span lang="EN-US"><span style="font-family:'Times New Roman';font-size:small;">&nbsp;</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">西安不銹鋼管施工方案</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">1</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、不銹鋼管子坡口可采用車床、電動坡口機、手動坡口機、角向砂輪機。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">2</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、不銹鋼彎頭、三通等宜采用制成品,現場加工時,應采用冷態加工工藝制成。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">3</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、不銹鋼管子的焊接可采用氬弧焊、手工電焊或采用氬弧焊打底,手工電弧焊蓋面,管內充氬保護的焊接工藝。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">4</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、不銹鋼管焊接前。應將坡口上的毛刺等用銼刀或砂紙**干凈,并用丙酮清洗坡口。采用手工電弧焊時,為防止焊接時的飛濺物落在管子上,焊接前應在距焊口</span><span style="font-family:'Times New Roman';"><span lang="EN-US">4</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">—</span><span style="font-family:'Times New Roman';"><span lang="EN-US">5mm</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">以外、</span><span style="font-family:'Times New Roman';"><span lang="EN-US">100mm</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">以內涂上適當稠度的石灰漿,待石灰漿干后開始焊接。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">5</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、不銹鋼管采用氬弧焊時,環境溫度應不低于</span><span style="font-family:'Times New Roman';"><span lang="EN-US">-5</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">℃,溫度過低,應采取預熱措施。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">6</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、不銹鋼管焊接時,管子應擱置在帶滾輪的托架上,以方便焊接。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">7</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、不銹鋼管道在電焊焊接完成后,應及時**焊縫表面熔渣及飛濺物,待無損探傷或檢驗合格后,應根據設計要求及時對焊縫表面及周圍進行酸洗、鈍化處理。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">8</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、不銹鋼主管上接支管時,如需在管子上開孔接支管,應按下列規定執行:</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">在主管上劃出與支管內徑一致的圓圈線,并打好中心孔,用轉頭或銑刀預先在轉床上加工出來;如采用電弧焊碳鋼焊條切割,應在割口邊緣削去</span><span style="font-family:'Times New Roman';"><span lang="EN-US">7</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">—</span><span style="font-family:'Times New Roman';"><span lang="EN-US">8mm</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">;如用不銹鋼焊條切割,可只磨削光滑即可;等離子法切割的孔,應用角向砂輪機將孔周圍磨掉</span><span style="font-family:'Times New Roman';"><span lang="EN-US">2</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">—</span><span style="font-family:'Times New Roman';"><span lang="EN-US">3mm</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">;</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">必須清洗開孔時掉入管內的切屑和熔渣;嚴禁用氣焊切割開孔。不銹鋼管部件如需熱加工,應編制嚴格的加熱工藝,熱加工過程必須有溫度檢測儀表控制。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">9</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、不銹鋼管的法蘭焊接方法與碳鋼管相同,當設計允許將碳鋼法蘭、管件焊接在不銹鋼管上時,必須采用鉻鎳含量高的不銹鋼焊條,如</span><span style="font-family:'Times New Roman';"><span lang="EN-US">A302</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">、</span><span style="font-family:'Times New Roman';"><span lang="EN-US">A307</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">,以減少炭鋼對不銹鋼合金成分的燒損。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"><span style="font-size:small;">公司至成立以來,以“誠信、合作、雙贏、發展”為經營宗旨,堅持“價格**、用戶、信譽”的營銷理念,在市場上獲得了良好的口碑。</span></span><span lang="EN-US"><br /> <span style="font-family:'Times New Roman';font-size:small;"> </span></span><span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"></span><span style="font-family:'Times New Roman';"><span lang="EN-US">&nbsp;&nbsp; </span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;"></span><span style="font-family:'Times New Roman';"><span lang="EN-US">029</span></span><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">—</span></span><span style="font-family:'Times New Roman';"><span lang="EN-US"><span style="font-size:small;">88633755<br /> </span><span style="font-size:small;"> </span></span></span><span style="font-size:small;"><span style="font-family:宋體;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;">詳情參考:</span><span lang="EN-US"><a href="http://www.sz-kyzs.com" target="_blank"><span style="color:#444444;font-family:'Times New Roman';">http://www.sz-kyzs.com</span></a></span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span lang="EN-US"><span style="font-family:'Times New Roman';font-size:small;">&nbsp;</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span lang="EN-US"><span style="font-family:'Times New Roman';font-size:small;">&nbsp;</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span>

西安不銹鋼管道拆除及施工方案

西安不銹鋼管道拆除施工方案
1
不銹鋼管道舊管線的拆除,采用等離子切割機先將管道割斷,然后由人工將管道拆除,若口徑大于DN200的管道,可采用手拉葫蘆協助吊卸。
2
拆卸下的管道,應及時將其清理出場,否則,新管道將無場地進行預制工作。
3
新管道預制時,將管道在地面按原管線走向一字排開,預制時,應根據現場實際情況定位。
4
供安裝的不銹鋼管及管件應具有制造廠的合格證書,化學成分和機械性能等資料,并經熱處理和晶間腐蝕實驗。管子及管件在使用前進行外觀檢查,表面不得有裂縫、重皮等缺陷。
5
管子安裝前應進行一般清洗,除去油污及其他污物。
6
不銹鋼管嚴禁使用氧-乙炔割刀,應采用鋸床、手鋸、砂輪切割機、等離子切割機等進行管道切割,砂輪片應選用專用砂輪片。
7
18-8不銹鋼管采用焊接連接,配件采用壓制件,由于18-8不銹鋼為奧氏體不銹鋼,采用的焊接方式為手工氬弧焊。選用的焊條及焊絲規格為:焊條牌號A132,焊絲鋼號H0Cr20Ni10Ti
8
管道應在支架固定好后安裝,管子不得與碳鋼支架直接接觸,應在管道與支架之間墊入不銹鋼片、不含氯離子的塑料片和橡膠板。
9
根據輸送介質和工作溫度的不同,法蘭墊片應按規范要求選用非金屬墊片或金屬墊片,非金屬墊片的氯離子含量不得超過50*10-6
10
不銹鋼管道管路較長或輸送介質溫度較高時,管路上應設補償器。
11
管道安裝完畢后,應按設計或規范要求進行試壓,采取水壓試驗時水的氯離子含量不得超過25*10-6

 

西安不銹鋼管施工方案

1、不銹鋼管子坡口可采用車床、電動坡口機、手動坡口機、角向砂輪機。

2、不銹鋼彎頭、三通等宜采用制成品,現場加工時,應采用冷態加工工藝制成。

3、不銹鋼管子的焊接可采用氬弧焊、手工電焊或采用氬弧焊打底,手工電弧焊蓋面,管內充氬保護的焊接工藝。

4、不銹鋼管焊接前。應將坡口上的毛刺等用銼刀或砂紙**干凈,并用丙酮清洗坡口。采用手工電弧焊時,為防止焊接時的飛濺物落在管子上,焊接前應在距焊口45mm以外、100mm以內涂上適當稠度的石灰漿,待石灰漿干后開始焊接。

5、不銹鋼管采用氬弧焊時,環境溫度應不低于-5℃,溫度過低,應采取預熱措施。

6、不銹鋼管焊接時,管子應擱置在帶滾輪的托架上,以方便焊接。

7、不銹鋼管道在電焊焊接完成后,應及時**焊縫表面熔渣及飛濺物,待無損探傷或檢驗合格后,應根據設計要求及時對焊縫表面及周圍進行酸洗、鈍化處理。

8、不銹鋼主管上接支管時,如需在管子上開孔接支管,應按下列規定執行:

在主管上劃出與支管內徑一致的圓圈線,并打好中心孔,用轉頭或銑刀預先在轉床上加工出來;如采用電弧焊碳鋼焊條切割,應在割口邊緣削去78mm;如用不銹鋼焊條切割,可只磨削光滑即可;等離子法切割的孔,應用角向砂輪機將孔周圍磨掉23mm

必須清洗開孔時掉入管內的切屑和熔渣;嚴禁用氣焊切割開孔。不銹鋼管部件如需熱加工,應編制嚴格的加熱工藝,熱加工過程必須有溫度檢測儀表控制。

9、不銹鋼管的法蘭焊接方法與碳鋼管相同,當設計允許將碳鋼法蘭、管件焊接在不銹鋼管上時,必須采用鉻鎳含量高的不銹鋼焊條,如A302A307,以減少炭鋼對不銹鋼合金成分的燒損。

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