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font-size: 14px;">2.由于板材表面不平整，厚度不均勻，有明顯的壓痕，裂紋，砂眼，疤痕，銹蝕等，風管內的噪音可能會造成這種現象?；蛘呤且驗轱L道平面下沉，側面向外凸出，有明顯變形。</span></p><p style="text-indent: 2em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">3.風管不允許有翹角、扭曲和彎頭。這是由于板材下料放樣不準確造成的；風道相互平行，相對面的板材長度和寬度不相等；風道的四個角的咬口寬度不等；咬縫設置位置不對，手動咬縫的力度不一樣；沒有采取相應的加固措施。這種情況會導致矩形管道的平面不平行，端面不平行；角度不正；對角不等式；咬得松一點。之后，直接的結果就是風管連接的受力會不均勻，安裝的風管會不直，法蘭墊片會不嚴密，系統會漏氣，造成空調的負荷損失，使用壽命會縮短。</span></p><p style="text-indent: 2em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">鍍鋅<a href='http://www.142779.com/news/456.html' target='_blank' class='key_tag'><font><strong>風管制作</strong></font></a>：經檢驗合格的鍍鋅鋼板應根據不同規格型號的鍍鋅風管的規格要求，采用不同厚度的板材制作。熟練的技術人員在熟悉圖紙中鍍鋅風管的尺寸和布置的基礎上，進行放線和下料，確保鍍鋅風管的制作和安裝符合《通風與空調工程施工質量驗收規范》(GB 50243-2002)4 . 3 . 1、4.3.2和4.3.3的要求。型材得要經雇主批準，不得有銹蝕、結皮或麻點。法蘭焊接的平面度錯縫不得大于0.5mm，鉚釘孔間距不得大于100mm(螺釘孔間距不得大于120mm)，孔間距應準確，可互換。</span></p><p style="text-align: center; text-indent: 2em;"><img src="/data/upload/201910/20191023173020_717.jpg" 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