专注通风管道加工·排烟罩

　　通风系统顾名思义就是让房间的空气得到很好的流通，使人在充足的氧气环境下地工作和生活，避免窒息的情况发生。

　　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.

　　通风管道一般采用的材质有钢板、镀锌钢板、玻璃钢等，管道本身是不会存在什么问题的。但是每节管道之间是需要法兰进行连接的，因为安装不当导致出现渗水，导致地面湿滑、头顶滴水、墙面装修的材质剥落脱皮，发霉变形的情况也有很多。也因工艺及安装问题，造成商业项目通风、排烟效果不佳，这不但影响项目质量，还影响使用效果，更会花很多的费用的来进行修补。

　　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.

　　下面就成都某商业项目通风管道采用的角钢法兰镀锌钢板风管，就其常用的两种材料、工艺及安装等进行简单介绍。

　　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、通风管道的规范要求：

　　1、 Specification requirements for ventilation ducts:

　　《通风与空调工程施工质量验收规范》GB50243—2002

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

　　《通风管道技术规程》JGJ141-2004

　　Technical Specification for Ventilation Ducts JGJ141-2004

　　二、风管的制作要求：

　　2、 Requirements for the production of air ducts:

　　1、制作风管前，要检查采用的材料是否符合质量要求，有否出厂合格证明书或质量鉴定文件。若无上述证明文件则应进行外观检查，并应符合下列要求：

　　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 板材表面应平整，厚度应均匀，无凸凹及明显的压伤现象，并不得有裂纹、砂眼、结疤及刺边和锈蚀情况；

　　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 型钢应该等型、均匀，不应有裂纹、气泡、窝穴及其他影响质量的缺陷；

　　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导致成品强度的降低或影响其使用效能。

　　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、风管和配件表面平整、圆弧均匀、纵向接缝应错开；咬口缝应紧密，宽度均匀。焊缝应作外观检查，不应有气孔、砂眼、夹渣、裂纹等缺陷，焊接后钢板的变形应矫正。

　　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、低压系统风管法兰的螺栓及铆钉孔的孔距不得大于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、矩形风管边长大于630mm、保温风管边长大于800mm，管段长度大于1250mm或低压风管单边平面积大于1.2m2时，均应采取加固措施。

　　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、风管外径或外边长的允许偏差：当小于或等于300mm时，为2mm；当大于300mm时，为3mm。管口平面度的允许偏差为2mm，矩形风管两条对角线长度之差不应大于3mm；圆形法兰任意正交两直径之差不应大于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、金属法兰连接风管的制作还应符合下列规定：

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

　　风管法兰的焊接应熔合良好、饱满，无假焊和孔洞；法兰平面度的允许偏差为2mm，同一批量加工的相同规格法兰的螺孔排列应一致，并具有互换性。风管与法兰采用铆接连接时，铆接应牢固、不应有脱铆和漏铆现象；翻边应平整、紧贴法兰，其宽度应一致，且不应小于6mm；咬缝与四角处不应有开裂与孔洞。

　　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、风管的安装要求

　　3、 Installation requirements for air ducts

　　1、风管安装前应内、外杂物，并做好清洁和保护工作；

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

　　2、风管安装位置、标高、走向应符合设计要求。现场风管接口的配置不得缩小其有效截面。

　　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、连接法兰的螺栓应均匀拧紧，其螺母宜在同一侧。

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

　　4、风管接口的连接应严密、牢固。风管法兰的垫片材质应符合系统功能的要求，厚度不应小于3mm。垫片不应凸入管内，亦不宜突出法兰外。

　　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、可伸缩金属或非金属软风管的长度不宜超过2米，并不应有死弯或塌凹。

　　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、风管与砖、混凝土风道的连接接口，应顺着气流方向插入，并应采取密封措施。风管穿出屋面处应设有防雨装置。

　　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、不锈钢板风管与支架的接触处应有隔绝或防腐绝缘措施。

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

　　8、在风管穿过需要封闭的防火、防爆的墙体或楼板时，应设预埋管或防护套管，其钢板厚度不应小于1.6mm；风管与防护套管之间，应用不燃且对人体无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、风管内严禁其他管线穿越。

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

　　10、斜插板风阀的安装，阀板必须为向上拉启；水平安装时，阀板还应为顺气流方向插入。

　　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、防火阀、排烟阀的安装方向、位置应正确。防火分区隔墙两侧的防火阀，距墙表面不应大于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 山东通风管道加工 友情奉献.更多有关的知识请点击  http://www.jnqsg.com           真诚的态度.为您提供为的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

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

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