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1. Under normal circumstances, flange-mounted flow meters are recommended. It has a more compact structure than flange-connected flowmeters, and its price is also lower. 2. The standard material 1Cr18Ni9Ti can be used in the vast majority of conventional media, including some corrosive media as well as saturated steam and superheated steam. Special materials are not necessary for non-special highly corrosive media, as the latter are expensive and require a long processing time. 3. In areas with explosion hazards, explosion-proof flow meters should be used. Since intrinsically safe instruments cannot be used in Class 0 hazardous areas, and it is not allowed to open the enclosure of intrinsically safe instruments while the device is still powered on in order to make circuit adjustments, it is highly recommended that users use intrinsically safe explosion-proof vortex flowmeters whenever possible. Explosion-proof flowmeters should only be considered in special cases. 4. Careful selection should be made when choosing flow meters that comply with DIN/ANSI standards. The actual diameter of DIN/ANSI instruments does not match that of GB international pipes. When the pipe under measurement is a GB international pipe, using flow meters manufactured according to DIN/ANSI standards can lead to problems during installation and operation. Flow meters conforming to the DIN/ANSI standards are used only when the pipes are DIN/ANSI pipes.