Overview
Rectangular welded thickened air ducts are engineered for demanding ventilation applications where standard ducts fail. Their robust construction involves precision welding and thickened metal sheets (typically 1.2–3.0 mm), ensuring leak-proof performance under extreme conditions. These ducts are a staple in industries requiring efficient airflow management, such as chemical plants, commercial kitchens, and cleanrooms. Unlike spiral or lightweight ducts, rectangular designs allow seamless integration into tight spaces with straight-line routing. The welding process eliminates gasket-dependent joints, reducing maintenance and improving longevity. Customization options include flanged connections, insulation layers, and anti-static coatings.
Structure and Working Principle
The duct’s rectangular cross-section optimizes airflow efficiency while minimizing space occupancy. Thickened panels are laser-cut and welded at seams using TIG or MIG techniques, creating a monolithic structure resistant to deformation. Internal baffles or dividers can be added for multi-channel systems. Airflow dynamics rely on the duct’s smooth interior, which reduces turbulence and pressure drops. Welded joints prevent air leakage, critical for systems handling toxic fumes or regulated environments. Supports are spaced at 1.5–3m intervals to account for added weight from thickened materials.
Key Features
Durability is paramount, with welded seams offering 2–3x the lifespan of folded-seam alternatives. Material choices dictate performance: galvanized steel suits general use, stainless steel resists acids, and aluminum provides lightweight strength. Thickness options (e.g., 1.5 mm for low-pressure, 2.5 mm for industrial) balance cost and load capacity. These ducts meet international standards like SMACNA for pressure classes up to 2500 Pa. Optional features include thermal insulation (fiberglass or foam) and fireproof coatings. Their modular design allows on-site assembly with bolted flanges or continuous welding for permanent installations.
Application Areas
Primary applications include industrial exhaust systems (e.g., welding fumes, chemical vapors), commercial HVAC in high-rise buildings, and specialized setups like laboratory fume hoods. In food processing, stainless steel variants ensure hygiene compliance. They’re also deployed in marine ventilation (saltwater-resistant aluminum) and energy plants handling hot gases. Custom sizes (up to 2000x1000 mm) accommodate large-volume airflow, while rectangular shapes simplify integration with square vents and filtration units.
Maintenance and Precautions
Regular inspections should focus on weld integrity, especially in high-vibration environments. Use non-abrasive cleaners for stainless steel to preserve corrosion resistance. Insulated ducts require moisture checks to prevent mold growth in wrapping layers. Avoid sharp bends (use radius elbows) to maintain airflow efficiency. During installation, seal flange connections with high-temperature gaskets. For corrosive environments, schedule annual ultrasonic thickness tests to monitor material degradation.
B2B Procurement Guide
Specify material grade (e.g., 304 stainless steel), thickness, and pressure class upfront. Request certified weld inspection reports (ISO 5817) and material test certificates. Lead times vary from 2–6 weeks for custom sizes. Bulk orders (100+ m²) often qualify for 5–15% discounts. Consider modular designs for projects requiring future expansion. Partner with manufacturers offering CAD support for precise ductwork layouts. Shipping costs can be significant due to weight; consolidate orders where possible.
Related Manufacturers
- 主营：[]
- 主营：生物除臭箱、PP喷淋塔、PP废气净化塔、PP风管、PP风机、PP塑料防腐风机、PP活性炭吸附箱、PP工业离心风机、PP离心式引风机
- 主营：[]
- 主营：[]
- 主营：[]
- 主营：不锈钢油烟罩、除尘管道、厂房排烟除尘、不锈钢风管、焊接风管、除尘风管、排烟风管、不锈钢焊接管、不锈钢螺旋风管、镀锌风管、新风管、环保除尘风管、碳钢风管、空调新风排风管、角钢法兰、消防排烟管道、油烟管道、工业罩、集气罩、工业排烟、镀锌法兰、不锈钢法兰、方形管道、防排烟管道、共板法兰
- 主营：预制不锈钢烟囱、保温烟囱、不锈钢烟囱、不锈钢风管、酒店污衣槽污衣井、不锈钢排油烟、双层保温不锈钢烟囱、预制双层不锈钢烟囱、锅炉烟囱、柴发烟囱、垃圾被服通道、厨房排油烟系统、烟囱
- 主营：不锈钢矩形风管、镀锌板风管、不锈钢风管、不锈钢螺旋风管、复合防火风管、不锈钢焊接风管、双层保温烟囱、不锈钢双层保温烟囱、不锈钢排烟风机
- 主营：矩形焊接加厚风管、不锈钢消防水箱、二次供水设备、不锈钢压力罐
- 主营：镀锌板、定制镀锌、管道配件、通风管、镀锌风管、铁皮风管、空调风管、法兰风管、风管共板、台风管道、管道风管、螺旋风管、风管制作、油烟风管、排烟风管、风管定制、方形风管、法兰共板、管道厂房、除尘管道、角铁法兰、机制法兰、管道共板、螺旋钢管、法兰方管
- 主营：白铁皮、镀锌板、排烟管、兰风管、庆风管、通风管道、螺旋风管、焊接风管、无花板风管、镀锌钢板风管、无花镀锌风管、螺旋焊接通风管、通风设备、螺旋钢管、复合螺旋管、镀锌螺旋管、通风排气管道、双层保温烟囱、镀锌角钢法兰、煤沥青漆防腐管
- 主营：不锈钢风管加工、共板法兰风管、角钢法兰风管、螺旋风管
- 主营：通风管、镀锌螺旋风管、镀锌焊接风管、焊接矩形风管、弯头螺旋风管、不锈钢焊接风管、工业管
- 主营：保温钉、保温钩钉、L型保温钉、焊接式保温钉、不干胶保温钉、船用粘钉、网孔保温钉、带钩保温钉、镀锌保温钩钉、电厂钩钉、自粘保温钉、幕墙保温钉、不锈钢带钩保温钉、不锈钢粘钉、胶粘保温钉、岩棉钉、岩棉板保温钉、不锈钢多孔保温钉
- 主营：排烟管、镀锌风阀、镀锌方管、镀锌风管、风管安装、法兰风管、风管配件、通风管道、螺旋风管、防火风管、矩形空调、焊接风管、圆形风管、不锈钢风管、管道配件、三通弯头、螺纹管道、角铁法兰、角钢法兰、弯头管道、消音管道、法兰圆弯头、法兰方弯头、消音静压箱、方变圆管道
- 主营：不锈钢板、不锈钢管、精密不锈钢带、不锈钢型材、不锈钢加工、不锈钢带、不锈钢角钢、不锈钢槽钢、不锈钢工字钢、不锈钢T型钢、不锈钢弹簧带、304不锈钢管、201不锈钢管、301不锈钢带、304不锈钢带、太钢不锈钢板、不锈钢无缝管、不锈钢焊管、不锈钢薄壁管、半硬不锈钢带、全硬不锈钢带、316L不锈钢板、超宽不锈钢板、超厚不锈钢板
- 主营：防风管、防火风管、超市风管、碳钢焊接、食堂风管、通风风管、厂房风管、净化风管、螺旋风管、定制风管、人防焊接、新风风管、除尘风管、焊接风管、管道风管、不锈钢风管、防排烟风管、镀锌板风管、环境设备
- 主营：法兰管、排烟管道、镀锌卷板、共板风管、镀锌风管、空调风管、角铁风管、法兰风管、通风管道、矩形风管、机制风管、方形风管、法兰通风管、不锈钢风管、角铁焊接风管、镀锌铁皮风管、通风排烟风管、不锈钢法兰、不锈钢共板、热镀锌角钢、方形排烟管、白铁皮共板管、排风排烟除尘、排烟除尘管道、不锈钢排烟管
- 主营：避雷塔、防雷塔、监控塔、电力塔、避雷线塔、瞭望铁塔、摄像铁塔、避雷针塔、避雷铁塔、碳钢烟囱、气象监控台、监测观赏塔、消防攀爬塔、电站架构塔、楼顶装饰塔、不锈钢烟囱、电力通讯塔、高压架线塔、玻璃钢烟囱、消防训练塔、无人监控台、双层保温烟囱、景区观光角钢塔、钢管角钢观望塔、森林防火观测塔
- 主营：通风管道、不锈钢风管、螺旋风管、角铁法兰风管、共板法兰风管
- 主营：预制不锈钢烟囱、不锈钢烟道、预制不锈钢保温烟囱、排烟不锈钢风管、厨房排油烟管道、不锈钢排烟管、不锈钢烟囱管道、不锈钢保温烟囱、污衣井、污衣槽、不锈钢污衣井、双层不锈钢烟囱、不锈钢烟囱、双层不锈钢保温烟囱、酒店污衣井、酒店污衣槽、布草井
- 主营：排烟风机、玻镁防火板、防火软接、镀锌风管、不锈钢风管、螺旋风管、彩钢玻纤复合风管、彩钢硅酸铝复合风管、钢面镁质复合风管、排烟阀、消声器、静压箱
- 主营：酒店排烟、车间暖通、螺旋管道、矩形风管、排烟风管、螺旋风管、不锈钢风管、排气通风管道、通风管道阀门、厨房通风管件、厨房油网、管道配件、厨房排烟罩、镀锌螺旋管、油烟收集罩、不锈钢油烟、管道圆形配件、不锈钢螺旋管
- 主营：防火风管、镀锌风管、螺旋风管、不锈钢排烟风管、焊接风管、矩形风管、金属风管、不锈钢风管、镁质高晶板复合风管、厨房排烟管道、不锈钢排烟管
- 主营：钢筋网片、钢筋桁架、冷轧带肋钢筋、工程焊接钢筋网片、冷拔丝钢筋网片、边坡钢筋网片、工地钢筋网片、建筑钢筋网片、煤矿用钢筋网片、工地螺纹钢筋网片、建筑工地螺纹钢筋网片、细丝钢筋桁架、小圆径钢筋桁架、澳标边坡防护网片、澳标热轧钢筋网片、塑料支架、澳标网片塑料支撑托、澳标网片塑料座架、澳标网片塑料固座、澳标网片塑料锁座、澳标网片塑料搁座、澳标网片塑料底托、澳标网片塑料支承座、澳标网片塑料加固座、澳标网片塑料定位架