根据搜索结果，通风管道法兰的铆钉间距有以下规定：

According to the search results, there are the following regulations for the rivet spacing of ventilation duct flanges:

对于一般情况，微、低压和中压系统风管法兰的螺栓及铆钉的间距应小于或等于150mm；高压系统风管则应小于或等于100mm。

For general situations, the spacing between bolts and rivets of air duct flanges for micro, low, and medium pressure systems should be less than or equal to 150mm; The air duct of the high-pressure system should be less than or equal to 100mm.

空气洁净度等级为N1级至N5级时，风管法兰的螺栓及铆钉孔的间距不应大于80mm；当空气洁净度等级为N6级至N9级时，不应大于120mm。

When the air cleanliness level is N1 to N5, the spacing between the bolt and rivet holes of the air duct flange should not exceed 80mm; When the air cleanliness level is N6 to N9, it should not exceed 120mm.

柔性管与法兰组装时，铆钉间距为60～80mm。

When assembling flexible pipes with flanges, the distance between rivets should be 60-80mm.

铆接应牢固，铆钉间距宜为100mm～120mm，且数量不少于4个。

Riveting should be firm, with a spacing of 100mm to 120mm between rivets, and the quantity should not be less than 4.

这些规定确保了通风管道法兰连接的强度和密封性，根据不同的系统压力和空气洁净度等级，铆钉间距有所不同

These regulations ensure the strength and sealing of ventilation duct flange connections, and the rivet spacing varies depending on the system pressure and air cleanliness level

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This article is provided by Shandong Ventilation Duct for you on our website http://www.jntfgd.com We will provide you with wholehearted enthusiasm and welcome your visit