Dry chemical, cartridge or cylinder operated · mild steel shells · Hydrostatic test · OSHA 29 CFR 1910.157
For Dry chemical, cartridge or cylinder operated · mild steel shells · Hydrostatic test · OSHA 29 CFR 1910.157, extinguishing agent / type is Dry chemical, cartridge or cylinder operated; shell material qualifier is mild steel shells; service obligation is Hydrostatic test; interval is 12; authority is OSHA 29 CFR 1910.157, recorded from its source on 2026-08-19.
- Extinguishing agent / type
- Dry chemical, cartridge or cylinder operated verified
- Shell material qualifier
- mild steel shells verified
- Service obligation
- Hydrostatic test our reading
- Interval
- 12 verified
- Authority
- OSHA 29 CFR 1910.157 our reading
- Section
- Table L-1 verified
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
The employer shall assure that portable extinguishers are hydrostatically tested at the intervals listed in Table L-1 of this section, except under any of the following conditions: ( i ) When the unit has been repaired by soldering, welding, brazing, or use of patching compounds; ( ii ) When the cylinder or shell threads are damaged; ( iii ) When there is corrosion that has caused pitting, including corrosion under removable name plate assemblies; ( iv ) When the extinguisher has been burned in a fire; or ( v ) When a calcium chloride extinguishing agent has been used in a stainless steel shell. ( 3 ) In addition to an external visual examination, the employer shall assure that an internal examination of cylinders and shells to be tested is made prior to the hydrostatic tests. Table L-1 Type of extinguishers | Test interval (years) | Soda acid (soldered brass shells) (until 1/1/82) | ( 1 ) | Soda acid (stainless steel shell) | 5 | Cartridge operated water and/or antifreeze | 5 | Stored pressure water and/or antifreeze | 5 | Wetting agent | 5 | Foam (soldered brass shells) (until 1/1/82) | ( 1 ) | Foam (stainless steel shell) | 5 | Aqueous Film Forming foam (AFFF) | 5 | Loaded stream | 5 | Dry chemical with stainless steel | 5 | Carbon dioxide | 5 | Dry chemical, stored pressure, with mild steel, brazed brass or aluminum shells | 12 | Dry chemical, cartridge or cylinder operated, with mild steel shells | 12
— ecfr.gov, retrieved 2026-08-19
Source
- ecfr.govhttps://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-L/section-1910.157