The product models of this standard are compiled in accordance with the provisions of JB/T 6924-1998 "Method for Preparing Product Models of Drying Equipment". This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage and other requirements of air flow dryers. This standard applies to straight tube, cyclone, and pulse tube air dryers. Other types of air dryers can also be implemented by reference. This standard was first released in June 2001.