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OSHA requirements

Flammable Storage Requirements Under OSHA

A flammable storage cabinet holds no more than 60 gallons of Category 1, 2 or 3 liquids, or 120 gallons of Category 4, in general industry (29 CFR 1910.106(d)(3)) and on construction sites (29 CFR 1926.152(b)(3)). Construction also limits a room to 25 gallons outside a cabinet and a storage area to three cabinets.

Verified vs OSHA sources · Oct 21, 2026

29 CFR 1910.106(d)(3)(i), 29 CFR 1926.152(b)(1), 29 CFR 1926.152(b)(3)

General industry and construction, side by side

The same question has two answers because OSHA writes two sets of rules. A shop, plant, warehouse or office follows 29 CFR part 1910. A construction jobsite follows 29 CFR part 1926.

TopicGeneral industry (29 CFR 1910)Construction (29 CFR 1926)
How much a cabinet holdsNot more than 60 gallons of Category 1, 2 or 3 flammable liquids, nor more than 120 gallons of Category 4 flammable liquids, may be stored in a storage cabinet.29 CFR 1910.106(d)(3)(i)Not more than 60 gallons of Category 1, 2 or 3 flammable liquids or 120 gallons of Category 4 shall be stored in any one cabinet, and not more than three such cabinets may be located in a single storage area. Larger quantities go in an inside storage room.29 CFR 1926.152(b)(3)
What the cabinet says on the doorCabinets shall be labeled in conspicuous lettering with the words “Flammable” and “Keep Fire Away.”29 CFR 1910.106(d)(3)(ii)Cabinets shall be labeled in conspicuous lettering with the words “Flammable” and “Keep Away from Open Flames.”29 CFR 1926.152(b)(2)(iii)
Outside a cabinetContainer sizes follow Table H-12. For a Category 1 liquid, for example, the table allows 1 pint in glass or approved plastic and 1 gallon in a metal container.29 CFR 1910.106(d)(2)(iii), Table H-12No more than 25 gallons of flammable liquids shall be stored in a room outside of an approved storage cabinet. Quantities over 25 gallons shall be stored in an acceptable or approved cabinet.29 CFR 1926.152(b)(1)
ContainersOnly approved containers and portable tanks shall be used. Metal containers and portable tanks meeting the Department of Transportation rules in 49 CFR are deemed acceptable.29 CFR 1910.106(d)(2)(i)Only approved containers and portable tanks shall be used for storage and handling, and approved safety cans or DOT approved containers shall be used for handling and use in quantities of 5 gallons or less, with an exception for highly viscid materials.29 CFR 1926.152(a)(1)
Pouring from one container to anotherCategory 1 or 2 flammable liquids, or Category 3 flammable liquids with a flashpoint below 100 °F, shall not be dispensed into containers unless the nozzle and container are electrically interconnected.29 CFR 1910.106(e)(6)(ii)Transfer of Category 1, 2 or 3 flammable liquids from one container to another shall be done only when the containers are electrically interconnected (bonded).29 CFR 1926.152(e)(2)
Exits and stairwaysExit routes shall be free and unobstructed, and no materials or equipment may be placed within them, permanently or temporarily.29 CFR 1910.37(a)(3)Flammable liquids shall not be stored in areas used for exits, stairways, or normally used for the safe passage of people.29 CFR 1926.152(a)(2)

What is OSHA's rule and what is not

LevelWhat it says
OSHA requirementThe cabinet paragraphs set the capacity, the fire test and the label. They do not ask for a cabinet to be grounded. The bonding rule applies when liquid is poured from one container into another.29 CFR 1910.106(d)(3)(ii) and 29 CFR 1926.152(b)(2)
Recommended practiceKeeping a running quantity for each cabinet and sorting shelves by category helps you stay under the limits. A written log is recommended, not required, by the cabinet paragraphs.29 CFR 1910.106(d)(3)(i) and 29 CFR 1926.152(b)(3)

Does your state do it differently?

Some states run their own State Plan and write their own text, so the federal paragraphs above describe federal OSHA states. Look up your state on the State Plans page and read its rule before you rely on the federal wording.

What OSHA cited most under these standards in FY2025

ParagraphWhat it coversFY2025 citations
1910.106(e)(6)(ii)Interconnect nozzle and container when dispensing67
1910.106(d)(2)(i)Only approved containers and portable tanks31
1910.106(g)(3)(iv)(D)31
1910.106(e)(9)(iii)30
1910.106(b)(6)29
1910.106(e)(6)(i)24
1926.152(e)(4)Dispensing units protected from collision20
1926.152(a)(1)Approved containers and safety cans13
1926.152(f)(3)7
1926.152(d)(2)3
1926.152(b)(5)1
1926.152(i)(6)1

1910.106: 476 citations in FY2025 at 344 inspections, 60 of them at construction sites (NAICS 23). 1926.152: 48 citations in FY2025 at 47 inspections, 48 of them at construction sites (NAICS 23). Citation items issued Oct 1, 2024 to Sep 30, 2025, counted by HazComFast on U.S. Department of Labor enforcement data (extracted Oct 13, 2026). Inspected establishments, not the whole industry.

Mistakes that turn up in inspections

  • Mixing up the two limits. The 60-gallon figure is for Category 1, 2 and 3 liquids and the 120-gallon figure is for Category 4, so the category of each product on the shelf decides which one counts.29 CFR 1910.106(d)(3)(i) and 29 CFR 1926.152(b)(3)
  • Putting a general industry label on a jobsite cabinet, or the reverse. The two paragraphs word the label differently.29 CFR 1910.106(d)(3)(ii) and 29 CFR 1926.152(b)(2)(iii)
  • Treating cabinet grounding as the bonding rule. The paragraph that asks for electrical interconnection is about dispensing from one container into another.29 CFR 1910.106(e)(6)(ii) and 29 CFR 1926.152(e)(2)
  • Stacking cans in a stairwell on a jobsite because the cabinet is full. Flammable liquids are not stored in exits, stairways or passageways.29 CFR 1926.152(a)(2)

Free tool

The limits depend on the category. Enter the flash point and boiling point from section 9 of the SDS and get the GHS category, signal word and pictogram.

Free flammable liquid category classifier

Inside HazComFast

The flammables total comes from the inventory

Import your chemical list from a spreadsheet, using hazard words or GHS codes, and each product lands with its pictograms, in the jobsite's flammables total and in the hazard filters. The total counts quantities, and an export from the app can be imported again.

Questions about flammable storage requirements

Does a flammable storage cabinet have to be grounded?

The cabinet paragraphs, 1910.106(d)(3) and 1926.152(b)(2) and (b)(3), say nothing about grounding the cabinet. The electrical interconnection rule is for transfer: in the plant, Category 1 or 2 liquids, or Category 3 liquids with a flashpoint below 100 °F, are not dispensed into containers unless the nozzle and container are interconnected; on a jobsite, Category 1, 2 or 3 liquids are transferred only when the containers are bonded.

29 CFR 1910.106(d)(3), 29 CFR 1926.152(b)(2), 29 CFR 1910.106(e)(6)(ii) and 29 CFR 1926.152(e)(2)

How many gallons can I keep in a flammable storage cabinet?

Up to 60 gallons of Category 1, 2 or 3 flammable liquids, or up to 120 gallons of Category 4. On a construction site, no more than three such cabinets may stand in one storage area.

29 CFR 1910.106(d)(3)(i) and 29 CFR 1926.152(b)(3)

How much flammable liquid can I keep outside a cabinet?

On a construction site, no more than 25 gallons in a room. In general industry the limits depend on where the liquid is stored, and the container sizes follow Table H-12, which you can check against the category of each product.

29 CFR 1926.152(b)(1) and 29 CFR 1910.106(d)(2)(iii)

The standards behind this answer

Keep reading

Sources and verification

Paragraphs verified against the eCFR on Oct 21, 2026 (title 29 current to Oct 19, 2026). Citation counts: U.S. Department of Labor enforcement data, FY2025, inspected establishments only. Not legal advice. See all OSHA requirement answers or the full list of standards.