Flammable liquids: categories, storage and separation
ASP written lesson, 12 min read. ASP Domain 4: Fire Prevention and Protection
AI-drafted from the cited rules and fact-checked against them. Study aid, not site-specific safety advice. The official rule controls.
What you'll learn
- Classify a liquid as Category 1, 2, 3 or 4 from its flashpoint and boiling point
- State maximum container, safety can and storage cabinet capacities by category
- Apply inside room and outdoor storage limits, distances and extinguisher placement
- Calculate minimum spacing between aboveground storage tanks
- Apply transfer, bonding, covering and ventilation rules for use inside a building
What this lesson covers
This lesson covers how OSHA sorts flammable liquids into four categories and how the category drives container sizes, cabinet and room limits, outdoor distances, tank spacing and transfer rules. These are the numbers and lookups candidates are tested on and safety professionals apply every day in shops, plants and warehouses.
This lesson is included with a pass
Written lessons come with every ASP pass, along with the video lessons, the question bank, mocks and the tutor. $80 per exam or $143 for all three, for 180 days.