The inner and outer surfaces of cold-rolled steel flange ventilation ducts and the internal heat transfer materials are firmly bonded, which is one of the basic standards to ensure composite materials. The defects of furniture boards with a total area exceeding a certain amount not only endanger the service life of the air duct, but also sometimes reduce the actual effect of its thermal insulation. Therefore, the defects shall not exceed 6 ‰, so as to achieve the normal application of materials in system software.

傳統式的通風空調工程風管橫著聯接，均選用扁鋼做成成對法蘭，各自鉚在風管兩邊并反邊，運用二根風管的這對法蘭，正中間再加上密封墊片并且用地腳螺栓把她們相互連接。因為受材料、機器和作業的限定，風管不太可能為降低這類連接頭做得較長。

The traditional ventilation and air conditioning project air ducts are connected horizontally. Flat steel is used to make a pair of flanges, which are riveted on both sides of the air duct and opposite sides. This pair of flanges of two air ducts are used, with a sealing gasket in the middle and anchor bolts used to connect them. Due to the limitation of materials, machines and operations, it is unlikely that the air duct will be long enough to lower such connectors.

生產流水線機械自動化、自動化技術水平高，進一步提高了制做效率及其風管的制做精密度。

The production line has a high level of mechanical automation and automation technology, which further improves the manufacturing efficiency and precision of air duct manufacturing.

風管開創法蘭，風管凈重，鍍鋅鐵風管加工廠家，與傳統式角鋼法蘭較為，節省了法蘭槽鋼及聯接地腳螺栓，降低材料耗損。管段長度大于1250mm或低壓風管單側平面積大于1.2mm，中高壓風管大于1.0mm，應采用加固方法。質量控制關鍵風管與法蘭鉚接前應進行技術質量審查，管段應留出10mm翻邊量。連接法蘭鉚釘時，有必要將鉚釘線垂直于板面，使鉚釘頭壓緊板材，使板縫緊密。

Compared with traditional angle steel flange, the air duct creates flange, net weight of air duct, and galvanized iron air duct processing factory, saving flange channel steel and connecting anchor bolts, and reducing material consumption. If the length of the pipe section is greater than 1250mm, or the flat area of one side of the low pressure air duct is greater than 1.2mm, and the medium and high pressure air duct is greater than 1.0mm, the reinforcement method shall be adopted. Before riveting the key air duct and flange for quality control, technical quality review shall be carried out, and 10mm flanging shall be reserved for the pipe section. When connecting flange rivets, it is necessary to make the centerline of the rivet perpendicular to the plate surface to make the rivet head press the plate tightly and make the plate seam tight.

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