This standard stipulates testing and inspection methods for centrifugal fans, axial fans, mixed flow fans, etc. (hereinafter referred to as fans) with a pressure ratio of less than approximately 1.3 (hereinafter referred to as fans) using air at room temperature and pressure. do. In the case of testing and inspection of blowers with a special structure or blowers used under special gas or other special conditions, an agreement shall be made between the parties concerned with the purchase and delivery, and this standard shall be applied with appropriate modifications and additions.