22.214.171.124.3.1* Maintenance Intervals
Table 126.96.36.199.3.1 Maintenance Involving Internal Examination
|Extinguisher Type||Internal Examination Interval (years)|
|Stored-pressure loaded stream and antifreeze||1|
|Pump tank water and pump tank calcium chloride-based||1|
|Dry chemical, cartridge- and cylinder-operated, with mild steel shells||1*|
|Dry powder, cartridge- and cylinder-operated, with mild steel shells||1*|
|AFFF (aqueous film-forming foam)||3†|
|FFFP (film-forming fluoroprotein foam)||3†|
|Stored-pressure dry chemical, with stainless steel shells||5|
|Dry chemical stored-pressure, with mild steel shells, brazed brass shells, and aluminum shells||6|
|Dry powder, stored-pressure, with mild steel shells||6|
*Dry chemical and dry powder in cartridge- or cylinder-operated extinguishers are examined annually.
†The extinguishing agent in liquid charge-type AFFF and FFFP extinguishers is replaced every 3 years, and an internal examination (teardown) is normally conducted at that time.
[10: Table 7.3.3]