1926.155(h): Flammable liquid
Key takeaways
- 1926.155(h) is part of OSHA's construction standards (29 CFR Part 1926, Subpart F).
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What this rule covers
29 CFR 1926.155(h) ("Flammable liquid") is one requirement inside 1926.155 Definitions applicable to this subpart, an OSHA construction standard (Part 1926, Subpart F). It includes 4 sub-paragraphs. The official text below is copied word for word from the Electronic Code of Federal Regulations (eCFR). The numbers, injury cases and training on this page show how OSHA enforces it on real job sites.
Official text
(h) Flammable liquid means any liquid having a vapor pressure not exceeding 40 pounds per square inch (absolute) at 100 °F (37.8 °C) and having a flashpoint at or below 199.4 °F (93 °C). Flammable liquids are divided into four categories as follows:
(1) Category 1 shall include liquids having flashpoints below 73.4 °F (23 °C) and having a boiling point at or below 95 °F (35 °C).
(2) Category 2 shall include liquids having flashpoints below 73.4 °F (23 °C) and having a boiling point above 95 °F (35 °C).
(3) Category 3 shall include liquids having flashpoints at or above 73.4 °F (23 °C) and at or below 140 °F (60 °C).
(4) Category 4 shall include liquids having flashpoints above 140 °F (60 °C) and at or below 199.4 °F (93 °C).
Source: eCFR, text current as of 2026-10-15. Read all of 1926.155.
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OSHA interpretation letters
- The definitions of combustible and flammable liquids under 29 CFR 1926 and 29 CFR 1910. (2010-07-14)
- Clarification of requirements for 1000 gallon diesel storage tank. (2000-06-09)
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About this page
Sources
- 29 CFR 1926.155 (eCFR), text current as of 2026-10-15
- U.S. Department of Labor enforcement data: OSHA inspections, citations and accident records, copied nightly
3-year window. Federal OSHA only; state-plan rules are not counted. Plain-language text is a summary, not legal advice; the official text controls. Black Belt Safety is not part of OSHA or the Department of Labor.