通風系統顧名思義就是讓房間的空氣得到很好的流通，使人在充足的氧氣環境下地工作和生活，避免窒息的情況發生。

　　As the name suggests, a ventilation system is designed to ensure good air circulation in a room, allowing people to work and live efficiently in an oxygen rich environment and avoiding suffocation.

　　通風管道一般采用的材質有鋼板、鍍鋅鋼板、玻璃鋼等，管道本身是不會存在什么問題的。但是每節管道之間是需要法蘭進行連接的，因為安裝不當導致出現滲水，導致地面濕滑、頭頂滴水、墻面裝修的材質剝落脫皮，發霉變形的情況也有很多。也因工藝及安裝問題，造成商業項目通風、排煙效果不佳，這不但影響項目質量，還影響使用效果，更會花很多的費用的來進行修補。

　　Ventilation ducts are generally made of materials such as steel plates, galvanized steel plates, fiberglass, etc. The ducts themselves will not have any problems. However, flanges are required to connect each section of the pipeline, as improper installation can lead to water seepage, resulting in slippery floors, dripping water from the top of the head, peeling of wall decoration materials, and many cases of mold and deformation. Due to process and installation issues, the ventilation and smoke exhaust effect of commercial projects is poor, which not only affects project quality but also affects the effectiveness of use, and will require a lot of cost to repair.

　　下面就成都某商業項目通風管道采用的角鋼法蘭鍍鋅鋼板風管，就其常用的兩種材料、工藝及安裝等進行簡單介紹。

　　Below is a brief introduction to the two commonly used materials, processes, and installation of angle steel flange galvanized steel sheet air ducts used in a commercial project in Chengdu.

　　一、通風管道的規范要求：

　　1、 Specification requirements for ventilation ducts:

　　《通風與空調工程施工質量驗收規范》GB50243—2002

　　Code for Acceptance of Construction Quality of Ventilation and Air Conditioning Engineering GB50243-2002

　　《通風管道技術規程》JGJ141-2004

　　Technical Specification for Ventilation Ducts JGJ141-2004

　　二、風管的制作要求：

　　2、 Requirements for the production of air ducts:

　　1、制作風管前，要檢查采用的材料是否符合質量要求，有否出廠合格證明書或質量鑒定文件。若無上述證明文件則應進行外觀檢查，并應符合下列要求：

　　1. Before making air ducts, the first thing to check is whether the materials used meet the quality requirements and whether there is a factory certificate of conformity or quality appraisal document. If there are no such supporting documents, a visual inspection should be conducted and the following requirements should be met:

　　1.1 板材表面應平整，厚度應均勻，無凸凹及明顯的壓傷現象，并不得有裂紋、砂眼、結疤及刺邊和銹蝕情況；

　　1.1 The surface of the board should be flat, the thickness should be uniform, there should be no protrusions or obvious pressure damage, and there should be no cracks, sand holes, scars, sharp edges, or rust;

　　1.2 型鋼應該等型、均勻，不應有裂紋、氣泡、窩穴及其他影響質量的缺陷；

　　1.2 Section steel should be of equal shape and uniform, without cracks, bubbles, cavities, or other defects that affect quality;

　　1.3 其他材料不能因具有缺陷導致成品強度的降低或影響其使用效能。

　　1.3 Other materials shall not have defects that result in a decrease in the strength of the finished product or affect its usability.

　　2、風管和配件表面平整、圓弧均勻、縱向接縫應錯開；咬口縫應緊密，寬度均勻。焊縫應作外觀檢查，不應有氣孔、砂眼、夾渣、裂紋等缺陷，焊接后鋼板的變形應矯正。

　　2. The surface of the air duct and accessories should be smooth, the arc should be uniform, and the longitudinal joints should be staggered; The bite joint should be tight and of uniform width. The weld seam should undergo visual inspection and should not have defects such as pores, sand holes, slag inclusions, cracks, etc. The deformation of the steel plate after welding should be corrected.

　　3、中、低壓系統風管法蘭的螺栓及鉚釘孔的孔距不得大于150mm。

　　3. The distance between the bolt and rivet holes of the flange of the medium and low pressure system air duct shall not exceed 150mm.

　　4、矩形風管邊長大于630mm、保溫風管邊長大于800mm，管段長度大于1250mm或低壓風管單邊平面積大于1.2m2時，均應采取加固措施。

　　4. When the side length of a rectangular air duct is greater than 630mm, the side length of an insulated air duct is greater than 800mm, the length of a pipe section is greater than 1250mm, or the single-sided flat area of a low-pressure air duct is greater than 1.2m2, reinforcement measures should be taken.

　　5、風管外徑或外邊長的允許偏差：當小于或等于300mm時，為2mm；當大于300mm時，為3mm。管口平面度的允許偏差為2mm，矩形風管兩條對角線長度之差不應大于3mm；圓形法蘭任意正交兩直徑之差不應大于2mm。

　　5. The allowable deviation for the outer diameter or outer length of the air duct is 2mm when it is less than or equal to 300mm; When it is greater than 300mm, it is 3mm. The allowable deviation for the flatness of the pipe mouth is 2mm, and the difference in length between the two diagonal lines of a rectangular air duct should not exceed 3mm; The difference between any two orthogonal diameters of a circular flange should not exceed 2mm.

　　6、金屬法蘭連接風管的制作還應符合下列規定：

　　6. The production of metal flange connected air ducts should also comply with the following regulations:

　　風管法蘭的焊接應熔合良好、飽滿，無假焊和孔洞；法蘭平面度的允許偏差為2mm，同一批量加工的相同規格法蘭的螺孔排列應一致，并具有互換性。風管與法蘭采用鉚接連接時，鉚接應牢固、不應有脫鉚和漏鉚現象；翻邊應平整、緊貼法蘭，其寬度應一致，且不應小于6mm；咬縫與四角處不應有開裂與孔洞。

　　The welding of the air duct flange should be well fused and full, without false welding or holes; The allowable deviation for flange flatness is 2mm, and the screw hole arrangement of flanges of the same specifications processed in the same batch should be consistent and interchangeable. When the air duct and flange are connected by riveting, the riveting should be firm and there should be no detachment or leakage of riveting; The flange should be flat and tightly attached to the flange, with a consistent width of no less than 6mm; There should be no cracks or holes at the seams and corners.

　　三、風管的安裝要求

　　3、 Installation requirements for air ducts

　　1、風管安裝前應內、外雜物，并做好清潔和保護工作；

　　1. Before installing the air duct, internal and external debris should be removed, and cleaning and protection work should be done well;

　　2、風管安裝位置、標高、走向應符合設計要求。現場風管接口的配置不得縮小其有效截面。

　　2. The installation position, elevation, and direction of the air duct should meet the design requirements. The configuration of on-site air duct interfaces shall not reduce their effective cross-section.

　　3、連接法蘭的螺栓應均勻擰緊，其螺母宜在同一側。

　　3. The bolts connecting the flanges should be tightened evenly, and their nuts should be on the same side.

　　4、風管接口的連接應嚴密、牢固。風管法蘭的墊片材質應符合系統功能的要求，厚度不應小于3mm。墊片不應凸入管內，亦不宜突出法蘭外。

　　4. The connection of the air duct interface should be tight and firm. The gasket material of the air duct flange should meet the requirements of the system function, and the thickness should not be less than 3mm. The gasket should not protrude into the pipe, nor should it protrude outside the flange.

　　5、可伸縮金屬或非金屬軟風管的長度不宜超過2米，并不應有死彎或塌凹。

　　5. The length of flexible metal or non-metal air ducts should not exceed 2 meters and should not have dead bends or dents.

　　6、風管與磚、混凝土風道的連接接口，應順著氣流方向插入，并應采取密封措施。風管穿出屋面處應設有防雨裝置。

　　6. The connection interface between the air duct and the brick or concrete air duct should be inserted in the direction of the airflow and sealed. Rainproof devices should be installed at the point where the air duct passes through the roof.

　　7、不銹鋼板風管與支架的接觸處應有隔絕或防腐絕緣措施。

　　7. The contact between the stainless steel plate air duct and the bracket should have isolation or anti-corrosion insulation measures.

　　8、在風管穿過需要封閉的防火、防爆的墻體或樓板時，應設預埋管或防護套管，其鋼板厚度不應小于1.6mm；風管與防護套管之間，應用不燃且對人體無危害的柔性材料封堵。

　　8. When air ducts pass through fire-resistant or explosion-proof walls or floors that require sealing, pre embedded pipes or protective sleeves should be installed, with a steel plate thickness of not less than 1.6mm; The gap between the air duct and the protective sleeve should be sealed with non combustible and non hazardous flexible materials.

　　9、風管內嚴禁其他管線穿越。

　　9. It is strictly prohibited for other pipelines to pass through the air duct.

　　10、斜插板風閥的安裝，閥板必須為向上拉啟；水平安裝時，閥板還應為順氣流方向插入。

　　10. The installation of the inclined insertion plate air valve requires the valve plate to be pulled upwards for opening; When installed horizontally, the valve plate should also be inserted in the direction of the airflow.

　　11、防火閥、排煙閥的安裝方向、位置應正確。防火分區隔墻兩側的防火閥，距墻表面不應大于200mm。

　　11. The installation direction and position of fire dampers and smoke exhaust dampers should be correct. The fire dampers on both sides of the fire partition wall should not be more than 200mm away from the wall surface.

　　本文由 山東通風管道加工 友情奉獻.更多有關的知識請點擊  http://www.nakmcc.cn           真誠的態度.為您提供為的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

　　This article is contributed by Shandong Ventilation Duct and Friendship. For more related knowledge, please click http://www.nakmcc.cn Sincere attitude. We provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Please stay tuned

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