Flange plate duct loss, Jie Weinuo power companies (certified), plum plants total of flange plate duct provided by 捷维诺 (Tianjin) Co., Ltd. Jie Weinuo (Tianjin) Co., Ltd. (www.jieweinuo.com) is specialized in the "total of flange plate duct dampers, fans, ventilation ducts, evaporative air conditioners, cable tray" of the enterprise, the company adhering to the "integrity management, service intentions, "the idea, to provide you with the highest quality products and services. Welcome to inquire! Contact: Su Wei. Star Industrial Co., Ltd. [Jie Weinuo recommend spiral spiral duct] shall comply with the requirements of this standard flange plate duct production, and in accordance with prescribed procedures approved drawings and technical documents. When both parties have the technical agreement flange plate duct, press both sides of the technology agreement to design and manufacture. 1, coil size, shape spiral length 1.1 1.1.1 usual length: 6 ~ 12m, by mutual agreement, the length can be lengthened or shortened. 1.1.2 Length Length: Length Length should be within the scope of a long pass, the limit deviation of ± 500mm. 1.1.3 precision cut lengths: By mutual agreement flange plate duct process, which can supply a length limit deviations 1.1.2 regulations more stringent than fine cut lengths. Spiral 1.2 roundness in the tube end 100mm length, maximum outside diameter steel pipe outside diameter not more than 1% of the nominal minimum outside diameter not smaller than 1% of nominal outside diameter. Using the ability to measure the maximum and minimum outside diameter of the caliper, lever gauge or other measurement tool. [Jie Weinuo to recommend the star product - a total of flange plate duct price] Jie Weinuo produce unique advantages duct flange angle iron, galvanized sheet duct, spiral duct flange plate duct needed equipment multifunction shears, multi undercut, multifunction beading machine, TDF flange forming machine, TDF folding side flanges, multifunction Corner code and hook punch.