Dry chemical fire extinguisher (2 figures)
The Extinguisher Class and Standard carries 4 published figures read from 2 sources' own pages, from 5 to 10 year, read 24 October 2026.
2 of the 12 named sources read in full publish a figure; 10 publish none, read 24 October 2026.
By jurisdiction
| Breakdown | Median | Range | Sources |
|---|---|---|---|
| jurisdictionGB | 5year | 5 to 5year | 1 |
| jurisdictionUS | 6year | 6 to 6year | 1 |
Every figure, with its source
One row per published figure: the figure as the source's own page publishes it, the page, and the day it was read. A figure that is not on a page we read is not on this one.
| Source | Figure | Breakdown | Read |
|---|---|---|---|
| OSHA 1910.157 standard text | 10year | US | 2026-10-24 |
| OSHA 1910.157 standard text | 6year | US | 2026-10-24 |
| MCA Marine Guidance Note 276: maintenance of portable fire extinguishers | 5year | GB | 2026-10-24 |
| OSHA 1910.157 standard text | 5year | US | 2026-10-24 |
The sentence each figure was read from (4)
- OSHA 1910.157 standard text, read 2026-10-24:
Nitrogen cylinders which comply with 49 CFR 173.34(e)(15) may be hydrostatically tested every 10 years.
- OSHA 1910.157 standard text, read 2026-10-24:
The employer shall assure that stored pressure dry chemical extinguishers that require a 12-year hydrostatic test are emptied and subjected to applicable maintenance procedures every 6 years.
- MCA Marine Guidance Note 276: maintenance of portable fire extinguishers, read 2026-10-24:
Type of portable extinguisher Basic service Extended service (test discharge) Overhaul (hydraulic test) Water, foam, & water based Every year Every 5 years Every 10 yearsc
- OSHA 1910.157 standard text, read 2026-10-24:
The employer shall assure that carbon dioxide extinguishers and nitrogen or carbon dioxide cylinders used with wheeled extinguishers are tested every 5 years at 5/3 of the service pressure as stamped into the cylinder.
Read in full, publishes no figure
10 named sources were read in full on the dates shown and print no usable figure. They are counted, never filled in.
- eCFR 29 CFR 1910.157 Portable fire extinguishers, read 2026-10-24: every candidate on the page was refused
- US Access Board, ADA Standards chapter 3 (Building Blocks, §308 Reach Ranges), read 2026-10-24: read in full and no accepted figure on the page
- NFPA 10, Standard for Portable Fire Extinguishers, read 2026-10-10: read in full and no accepted figure on the page
- Scottish Fire and Rescue Service business advice and guidance, read 2026-10-24: read in full and no accepted figure on the page
- Scottish Government practical fire safety guidance, existing non-residential premises, read 2026-09-12: every candidate on the page was refused
- Fire (Scotland) Act 2005, read 2026-10-24: every candidate on the page was refused
- BSI, BS EN 3-7 Portable fire extinguishers (characteristics, performance requirements and test methods), read 2026-09-12: read in full and no accepted figure on the page
- BSI, BS 5306-3 Commissioning and maintenance of portable fire extinguishers, read 2026-09-12: read in full and no accepted figure on the page
- US Fire Administration, Choosing and Using Fire Extinguishers, read 2026-09-19: read in full and no accepted figure on the page
- Derbyshire Fire and Rescue Service, fire extinguishers, read 2026-09-19: read in full and no accepted figure on the page
Methodology
Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2).
2 of the 12 named sources that could be read published a usable figure; 10 published none and are recorded as not published, never filled in; 4 could not be read (blocked, dead or unreachable) and count nowhere.
The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source in year (a source's median where its page yielded several accepted sentences), so N counts sources, never sentences; 47 candidate sentence(s) were refused by a reviewer with the reason recorded.
The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): one row per extinguishing agent per jurisdiction, joining what nobody publishes in one place: the fire classes the agent is rated for, the colour band or label the jurisdiction's standard gives it (BS EN 3-7's signal-red body with a >=5% second-colour zone in GB, NFPA 10's letter-and-pictograph label in the US), the mounting height and travel distance the regulator sets (OSHA's 5ft / 3.5ft by weight and 4in floor clearance; the UK's siting practice), the inspection, service, extended-service and hydrostatic-test intervals with their source clause, and the SAME-AGENT-DIFFERENT-NAME map (UK 'wet chemical' = US Class K; UK 'powder' = US 'dry chemical'), which is the single figure the two highest-volume keyword blocks in this venture are both asking for and which no authority publishes because each authority only knows its own regime; changed-since on every standard revision and rate-year turn
47 candidate sentences on these pages were refused by a reviewer; each refusal and its reason is recorded in the review ledger.
Sources (16)
- eCFR 29 CFR 1910.157 Portable fire extinguishers(the publisher's own terms; quoted for reporting and comment)
- OSHA 1910.157 standard text(the publisher's own terms; quoted for reporting and comment)
- US Access Board, ADA Standards chapter 3 (Building Blocks, §308 Reach Ranges)(the publisher's own terms; quoted for reporting and comment)
- MCA Marine Guidance Note 276: maintenance of portable fire extinguishers(the publisher's own terms; quoted for reporting and comment)
- NFPA 10, Standard for Portable Fire Extinguishers(the publisher's own terms; quoted for reporting and comment)
- Scottish Fire and Rescue Service business advice and guidance(the publisher's own terms; quoted for reporting and comment)
- Scottish Government practical fire safety guidance, existing non-residential premises(the publisher's own terms; quoted for reporting and comment)
- Fire (Scotland) Act 2005(the publisher's own terms; quoted for reporting and comment)
- BSI, BS EN 3-7 Portable fire extinguishers (characteristics, performance requirements and test methods)(the publisher's own terms; quoted for reporting and comment)
- BSI, BS 5306-3 Commissioning and maintenance of portable fire extinguishers(the publisher's own terms; quoted for reporting and comment)
- US Fire Administration, Choosing and Using Fire Extinguishers(the publisher's own terms; quoted for reporting and comment)
- County Durham and Darlington Fire and Rescue Service, number of fire extinguishers required(the publisher's own terms; quoted for reporting and comment)
- Derbyshire Fire and Rescue Service, fire extinguishers(the publisher's own terms; quoted for reporting and comment)
- Firesafe.org.uk, portable fire extinguishers: classes, colour coding, rating, location and maintenance(the publisher's own terms; quoted for reporting and comment)
- landingpage.bsigroup.com(the publisher's own terms; quoted for reporting and comment)
- ecfr.gov(the publisher's own terms; quoted for reporting and comment)
Cite or embed this figure
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The Extinguisher Class and Standard carries 4 published figures read from 2 sources' own pages, from 5 to 10 year, read 24 October 2026.
2 of the 12 named sources read in full publish a figure; 10 publish none, read 24 October 2026.
Extinguisher Class and Standard, jurisdiction GB: median 5 year across 1 source, read 24 October 2026.
Extinguisher Class and Standard, jurisdiction US: median 6 year across 1 source, read 24 October 2026.
Cite as: "Asbestos Survey Cost Extinguisher Class and Standard", updated 2026-10-25, https://asbestossurveycost.co.uk/datasets/extinguisher-class-and-standard/.
Download the CSV (4 rows, computed 2026-10-25)