通风排烟管道现场接口的配置，不得缩小其有效截面。这里是指风管与配件，部件及设备相接部位的连接管。
The effective cross-section of the ventilation and smoke exhaust pipe shall not be reduced in the configuration of the on-site interface. Here refers to the connection pipe between the air duct and accessories, parts and equipment.
室内吊架不得设置在风口、风阀、检查门及百叶窗口正下方，吊杆不宜直接固定在法兰上，以免排烟通风管道变形与影响维修。排烟通风管道安装前必须保证其内部干净无水滴。
Indoor hangers should not be installed directly under the tuyeres, air valves, inspection doors and shutters. Suspenders should not be fixed directly on the flange in order to avoid deformation of smoke exhaust ventilation pipelines and affect maintenance. Before installing smoke exhaust ventilation pipes, it is necessary to ensure that there are no water droplets in the pipes.