不锈钢螺旋风管在正常使用中的绝对优势 The absolute advantage of stainless steel spiral duct in normal use 　 不锈钢螺旋风管在正常的使用中具有绝对优势，其安装显着地减少了管与管之间的连接点，使管件结合部的泄漏减少到最低程度，典型的不锈钢螺旋风管长度是3~6m，而典型的矩形风管的长度只有1~1.5m；且连接两个不锈钢螺旋风管只需一个管接件，而传统的矩形风管的连接则常常需要一个完全独立的双法兰系统。　　螺旋圆风管的配件的生产已高度自动化、系统化，并具有工业化的质量控制。安装时间只有相类似的矩形管道的1/3。在不增加任何压降的情况下，相同的安装空间内直径为200mm的圆形管道可取代250×150mm的矩形管道。在不增加额外安装空间的前提下，数条平行的圆形管道可取代扁平矩形管道。考虑了所有的因素，在绝大多数情况下，圆形管道所占用的空间都要少于矩形管道。　　众所周知，圆形风管的风阻比矩形风管的风阻要小得多。精密的咬口成型工艺：进口设备所采用的模具均为特种钢材结构，即使使用了三五年，其压制模具的表面仍保持不变，使得镀锌钢板的表面不受损伤，大大的延长了风管的使用寿命，同时接缝均匀平整、咬口紧密、连接力强、密封性好。　　 Stainless steel spiral duct has absolute advantage in the course of normal use, its installation noticeably reduce the connection point between the tube and tube, the pipe joint leakage is reduced to the lowest degree, the typical stainless steel spiral duct length is 3 ~ 6 m, and the length of a typical rectangular duct only 1 ~ 1.5 m; Connecting two stainless steel spirals requires only one pipe connection, and the traditional rectangular duct is often required to have a fully independent double flange system. The production of spiral circular duct fittings is highly automated, systematic and has the quality control of industrialization. The installation time is only 1/3 of the rectangular tube. In the case of no pressure drop, a circular pipe with a diameter of 200mm in the same installation space can replace the 25x 150mm rectangular pipe. Without adding additional installation space, several parallel circular pipes can replace the flat rectangular pipe. Considering all the factors, in the vast majority of cases, the circular pipe occupies less space than the rectangular pipe. It is well known that the wind resistance of the circular duct is much smaller than that of the rectangular duct. Precision of jiaokou molding process: imported equipment mould are adopted by the special steel structure, even using the three to five years, its suppression of mould surface remain unchanged, making the surface of galvanized steel plate is not damaged, greatly extend the service life of the duct, uniform flat seam at the same time, bite tight, even the relay is strong and good sealing.