Dry chemical · stainless steel · Hydrostatic test · OSHA 29 CFR 1910.157

What is the interval for Dry chemical · stainless steel · Hydrostatic test · OSHA 29 CFR 1910.157?

For Dry chemical, shell material qualifier is stainless steel; service obligation is Hydrostatic test; authority is OSHA 29 CFR 1910.157; interval is 5; section is Table L-1, recorded from its source on 2026-08-19.

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

— ecfr.gov, retrieved 2026-08-19