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通过对法兰安装的通风与空调风管在穿越建筑结构本体时安装技术要求的分析,结合国家现行的技术标准和规范,对于通风与空调风管穿越建筑结构预留孔洞尺寸大小的规定以及我国现行的几种风管材料在各种不同规格条件下的法兰尺寸的大小与预留孔洞尺寸的比较,指出在通风与空调风管口径较大的时候,按照《通风管道技术规程》JGJ141-2004规定预留的孔洞尺寸偏小,满足不了通风与空调风管穿越建筑结构安装要求。建议按照法兰安装的通风与空调风管法兰外边尺寸增加安装富裕尺寸来确定预留孔洞的尺寸。
Through the analysis of the technical requirements for the installation of the ventilation and air-conditioning ducts of the flanges when crossing the building structure body, the provisions of the size of the holes reserved for the ventilation and air-conditioning ducts to pass through the building structure in combination with the current national technical standards and norms, Several existing duct materials in a variety of different specifications under the size of the flange size and the size of the hole reserved for comparison, pointed out that when the ventilation and air conditioning duct diameter larger, according to “ventilation duct Technical Regulations” JGJ141- 2004 regulations reserved hole size is too small, can not meet the ventilation and air conditioning duct through the building structure installation requirements. It is advisable to increase the size of the reserved holes by increasing the size of the installation flanges according to the size of the flanges of the ventilation and air-conditioning ducts installed in the flanges.