Regarding combustible gases (exhaust gases), the issue of safe flow velocity
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For combustible gases (exhaust gases), what should be the relatively safe flow rate to avoid the generation of static electricity? Are there any standards or calculation methods for this?
SH/T 3035-2007 \"Guidelines for the Selection of Pipe Sizes in Petrochemical Process Units\" 6.3.2 The Mach number of gases at the end of ordinary pipes should be less than 0.3, while the Mach number at the end of special pipes (such as emergency discharge pipes) should not exceed 0.7