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6.3  风管安装 

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6.3.1  金属风管的制作和连接应符合下列规定：vfnobaiscfejjeehmigvt

    1  风管采用法兰连接时，风管法兰材料规格应按本标准表6.3.1选用，其螺栓孔的间距不得大于150mm，矩形风管法兰四角处应设有螺孔；hhjpxgnuddcyumsspwybpfaghx

表6.3.1 风管法兰及螺栓规格

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金属风管法兰、螺栓规格与风管宽高的对应关系

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    2  板材应采用咬口连接或铆接，除镀锌钢板及含有复合保护层的钢板外，板厚大于1.5mm的可采用焊接；ykqsgcwhqioomfllupvxbzrukazvlvwri

    3  风管应以板材连接的密封为主，可辅以密封胶嵌缝或其他方法密封，密封面宜设在风管的正压侧；cpdbaisrmawaeiznppbxhjsnqapiedtesyievy

    4  无法兰连接风管的薄钢板法兰高度及连接应按本标准表6.3.1的规定执行；

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建筑防烟排烟系统技术标准 [附条文说明] GB51251-2017

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