通風管道是為了使空氣流通，降低有害氣體濃度的一種市政基礎設施。通風管，風管制作與安裝所用板材、型材以及其他主要成品材料，應符合設計及相關產品標準的規定，并應用出廠檢驗合格證明，材料進場時應按有關標準進行驗收。

Ventilation duct is a kind of municipal infrastructure to make air circulate and reduce the concentration of harmful gases. The plates, profiles and other main finished materials used for the fabrication and installation of ventilation pipes and air ducts shall comply with the provisions of the design and relevant product standards, and the factory inspection certificate shall be applied. The materials shall be accepted according to relevant standards when entering the site.

1，風管式通風：設備簡單，靈活方便，易于拆卸，但由于斷面小，隨著管路的加長，通風阻力將增大。

1. Air duct ventilation: the equipment is simple, flexible and convenient, and easy to disassemble. However, due to the small section, the ventilation resistance will increase with the extension of the pipeline.

2，巷道式通風：適用于有平行導坑的長隧道，特點是通過前面的橫通道，使正洞和平行導坑組成一個循環風流系統，在平導坑口附近安裝通風機，將污濁空氣由平導抽出，新鮮空氣由正洞流入，形成循環風流。

2. Roadway ventilation: It is applicable to long tunnels with parallel pilot pits. It is characterized by that the main tunnel and parallel pilot pits form a circulating air flow system through the front cross passage. Ventilators are installed near the flat pilot pit mouth to extract the dirty air from the horizontal pilot, and fresh air flows in from the main tunnel to form a circulating air flow.

3，風墻式通風：利用隧道成洞部分空間，用磚砌或木板隔出一條風道，代替大直徑風管，以縮短風管長度，而又能增大供風量滿足通風要求，該方式適用于縮短較長，又無平行導坑可供利用，而管道式通風又難以全盤解決的情況。

3. Air wall ventilation: use part of the tunnel space to separate an air duct with bricks or boards instead of large diameter air ducts to shorten the length of the air duct, while increasing the air supply to meet the ventilation requirements. This method is applicable to the situation where the air duct is shortened for a long time, there is no parallel heading available, and pipe ventilation is difficult to solve comprehensively.

西安通風管道加工廠，加工鍍鋅鐵皮風管（圓管、方管）、不銹鋼管道（圓管、方管）。通風管道常用鍍鋅鐵皮管道和不銹鋼管道，在酸霧排氣方面可進行金屬管道噴塑處理再使用，也可以直接采用PP管道（防火性能不要求的情況下使用），部分小型排氣、送風管道為節約成本，也可采用PVC、PPR管道作為風管。

Xi'an Ventilation Duct Processing Factory specializes in processing galvanized iron sheet air duct (round pipe, square pipe) and stainless steel pipe (round pipe, square pipe). Galvanized iron sheet pipes and stainless steel pipes are commonly used for ventilation pipes. In terms of acid mist exhaust, metal pipes can be sprayed with plastics for reuse, or PP pipes can be directly used (when the fire resistance is not required). In order to save costs, some small exhaust and air supply pipes can also use PVC and PPR pipes as air pipes.