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style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">　　風管咬口寬度應根據鋼板厚度嚴格控制，偏差不應超過規范允許值。咬口完成后風管外觀質量的檢驗標準為:圓弧均勻，折角平直，表面不平整不大于5mm，兩端平行，無翹角。咬縫應結合緊密，不能有半咬和裂紋。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";"></span></p><p style="text-align: center"><img src="/data/upload/201910/1571817329189340.jpg" alt="白鐵風管加工廠" width="397" height="259" border="0" vspace="0" title="白鐵風管加工廠" style="width: 397px; height: 259px;"/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";"></span><br/></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">　　彎頭導葉:</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">　　為了減少系統的局部阻力，保證通風效果，要特別注意<a href='http://www.bellpropaint.com/news/434.html' target='_blank' class='key_tag'><font><strong>通風管道</strong></font></a>中彎頭、異徑管、三通、風道套管的加工制造。當矩形風管采用內外圓弧彎頭時，風管內圓弧半徑R與彎管邊長A之比應為R/A。當采用內圓弧矩形彎頭和內對角線矩形彎頭時，如彎頭的平面邊長a。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">　　風管連接及漏光檢查:</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">　　風管接口應連接緊密。<a href='http://www.bellpropaint.com/news/460.html' target='_blank' class='key_tag'><font><strong>風管法蘭</strong></font></a>的墊片不應伸入管內，也不應伸出法蘭。風管與磚混風管連接時，應沿氣流方向插入，接口應密封；根據規范和圖集在風管離開屋面的地方安裝防雨罩，并采取防風措施。<a href='http://www.bellpropaint.com/news/450.html' target='_blank' class='key_tag'><font><strong>風管系統</strong></font></a>安裝完成后，需要進行嚴密性試驗，根據系統壓力等級的不同，可采用漏光法或漏風法。</span></p></div> <div class="xypg-detail-tags"> <div class="tags-title"> <h3>標簽</h3> <div class="baidu-share">  <div class="bdsharebuttonbox"> <a href="#" class="bds_more" data-cmd="more"></a> <a href="#" class="bds_tsina" data-cmd="tsina" title="分享到新浪微博"></a> <a href="#" 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