This standard specifies the requirements for the design, manufacturing, test methods, inspection rules, marking, packaging, storage and transportation of free-floating ball automatic drainers (hereinafter referred to as FZB automatic drainers or drainers). This standard is applicable to the collection of condensate (water) in exhaust gas and steam engineering equipment, the nominal pressure P is 0.1MPa~6.4MPa, the nominal diameter DN is 10mm~100mm, and the medium temperature T is 0℃~450℃ Drainer.