W-F-2793, FEDERAL SPECIFICATION: FANS, CENTRIFUGAL, DRAFT, FORCED AND INDUCED (02-JUL-1992) [SUPERSEDING MIL-F-18523C] [S/S BY A-A-59222]

W-F-2793, FEDERAL SPECIFICATION: FANS, CENTRIFUGAL, DRAFT, FORCED AND INDUCED (02-JUL-1992) [SUPERSEDING MIL-F-18523C] [S/S BY A-A-59222]., This specification defines the engineering, logistics, quality assurance and procuring requirements for centrifugal fans used in low-pressure boilers (less than 15 pounds per square inch (psi) operating pressure) and in medium and high pressure (greater than 15 psi operating pressure) (coal, oil and gas fired) power boiler plant systems.