Flammable Liquids Storage Guidelines

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Questions and Answers

What is the main purpose of bonding when transferring flammable liquids?

  • To make sure both containers are electrically neutral to each other (correct)
  • To cool down the liquid during transfer
  • To ensure containers are securely sealed
  • To prevent the accumulation of pressure in containers

How far away should flammable materials be stored from ignition sources?

  • 10 feet
  • 50 feet
  • 25 feet (correct)
  • 100 feet

What is the requirement for dispensing Category 1 or 2 flammable liquids?

  • Containers need to be hermetically sealed
  • Both the nozzle and container must be made of glass
  • The nozzle and container must be electrically interconnected (correct)
  • They must be dispensed in a well-ventilated area

What does grounding refer to in the context of flammable liquids?

<p>A wire connecting the filling container to an earth ground (A)</p> Signup and view all the answers

Which of the following standards addresses bonding and grounding for flammable liquids?

<p>OSHA 29 CFR 1910.106 (A)</p> Signup and view all the answers

What is the maximum allowed quantity of Category 1 flammable liquid in a fire area outside protected storage?

<p>25 gallons (A)</p> Signup and view all the answers

Where is flammable liquid storage prohibited?

<p>In office areas (D)</p> Signup and view all the answers

Which of the following is an exemption for the incidental storage of flammable liquids?

<p>Furniture manufacturing (C)</p> Signup and view all the answers

What is the flash point criterion for Category 4 flammable liquids?

<p>Flash point &gt; 60°C and ≤ 93°C (C)</p> Signup and view all the answers

What determines the allowable quantities of flammable liquids in a storage area?

<p>The size of the room and its fire resistance (C)</p> Signup and view all the answers

What volume of a Category 2, 3, or 4 flammable liquid is allowed in a single portable tank?

<p>660 gallons (C)</p> Signup and view all the answers

Which of the following structures is NOT suitable for storing flammable liquids?

<p>Office area (D)</p> Signup and view all the answers

What is the minimum required ventilation capacity for an inside storage room?

<p>6 air changes per hour (C)</p> Signup and view all the answers

Which of the following is NOT a requirement for the storage room design?

<p>Redundant electrical supply (A)</p> Signup and view all the answers

What is the maximum size for a storage room with 2 hours fire resistance and allowed fire protection?

<p>500 sq.ft. (C)</p> Signup and view all the answers

What is the minimum aisle width required in an inside storage room?

<p>3 feet (A)</p> Signup and view all the answers

What happens when the allowable quantities of flammable liquids are exceeded in an inside storage room?

<p>The liquids must be stored in separate external buildings. (C)</p> Signup and view all the answers

What rating is required for forklift trucks used in flammable environment storage rooms?

<p>Rated for use in a flammable environment (B)</p> Signup and view all the answers

When containers hold 30 gallons or more, what is prohibited in indoor storage rooms?

<p>Stacking containers on top of one another (C)</p> Signup and view all the answers

According to OSHA's regulations, what is the fire-resistive rating that allows for a maximum of 10 gallons per square foot?

<p>2 Hours with fire protection (B)</p> Signup and view all the answers

Which of the following components is designed to fail in case of an explosion?

<p>Blowout panels (C)</p> Signup and view all the answers

What should be incorporated into an inside storage room to handle spills?

<p>Sumps, ramps, or dikes (D)</p> Signup and view all the answers

What is the maximum allowable size for glass containers holding Category 3 flammable liquids?

<p>1 gallon (D)</p> Signup and view all the answers

Which type of container has the smallest maximum allowable size for Category 1 flammable liquids?

<p>Glass or approved plastic (C)</p> Signup and view all the answers

What is the requirement for the doorsill height of compliant flammable storage cabinets?

<p>At least 2 inches (C)</p> Signup and view all the answers

Which of the following does not require venting for fire protection purposes according to NFPA 30?

<p>Storage cabinets (D)</p> Signup and view all the answers

For which category of flammable liquids do metal containers (other than DOT drums) have a maximum size of 5 gallons?

<p>Category 2 (A), Category 3 (B), Category 4 (C)</p> Signup and view all the answers

What is NOT an exemption to the maximum allowable size for flammable containers as stated in OSHA regulations?

<p>Fireproof cabinets (C)</p> Signup and view all the answers

What gauge sheet iron must metal cabinets be constructed from according to OSHA requirements?

<p>18-gauge (C)</p> Signup and view all the answers

What is the maximum allowable size for safety cans holding Category 4 flammable liquids?

<p>5 gallons (A)</p> Signup and view all the answers

What should be placed in the bung of non-vented storage cabinets?

<p>The bung itself (A)</p> Signup and view all the answers

What is the maximum increase in allowable quantities of flammable liquids if they are stored in approved storage cabinets?

<p>100% (B)</p> Signup and view all the answers

What is required to be placed outside indoor storage rooms according to OSHA?

<p>One portable fire extinguisher not less than 12-B units (A)</p> Signup and view all the answers

How far from a Category 1, 2, or 3 flammable liquid storage area must an extinguisher be located?

<p>Not less than 10 feet and not more than 25 feet (B)</p> Signup and view all the answers

What is the minimum required space between buildings and flammable liquid containers?

<p>10 feet (A)</p> Signup and view all the answers

Which of the following chemicals should not be stored with flammable liquids due to compatibility issues?

<p>Calcium oxide (D)</p> Signup and view all the answers

What type of materials are susceptible to spontaneous heating and/or explosions?

<p>Combustible materials (C)</p> Signup and view all the answers

What is a necessary feature for an outdoor storage area of flammable liquids?

<p>It must have fire control devices (D)</p> Signup and view all the answers

Which of the following acids is identified as a common incompatible chemical with flammables?

<p>Acetic acid (A)</p> Signup and view all the answers

What feature of outdoor storage areas is necessary to avoid spills reaching buildings?

<p>A slope or grading of the storage area (A)</p> Signup and view all the answers

Why should flammable liquids not be stored with oxidizing agents?

<p>They provide oxygen to accelerate combustion (D)</p> Signup and view all the answers

Flashcards

Incidental Storage

A specific area within a facility where the use and handling of flammable liquids is only incidental to the main business operation. Examples include automobile assembly, construction of electronic equipment, and furniture manufacturing.

Flammable Liquid Storage Containers

Flammable liquids must be stored in a closed container, such as a tank or a container that complies with OSHA and NFPA standards.

Flammable Storage Cabinet

A storage cabinet specifically designed to store flammable liquids, providing fire protection.

Inside Storage Room

A room or space designated for storing flammable liquids, often with additional fire safety measures.

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Flammable Storage Warehouse

A building specifically designed for storing large quantities of flammable liquids, featuring enhanced fire protection and safety features.

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Category of Flammable Liquids

A category of flammable liquids based on their flash point and boiling point. Lower categories have a lower flash point and are considered more flammable.

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Flash Point

A measure of a liquid's ability to ignite, specifically the lowest temperature at which the liquid gives off enough vapor to ignite in the presence of an ignition source.

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Grounding

A wire that connects a metal container to the earth or building ground, preventing the buildup of static electricity.

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Bonding

A jumper wire connecting two containers during liquid transfer, ensuring they are electrically neutral to avoid sparks.

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Electrical Interconnection

A method to prevent static electricity buildup during liquid transfer by connecting containers with a wire.

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Flammable Liquids

Liquids that easily ignite and pose high fire hazards. These are categorized by flash points.

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29 CFR 1910.106: Flammable Liquid Container Sizes

OSHA standard outlining maximum container sizes for flammable liquids, categorized by flammability class (1-4).

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Flammable Storage Cabinet Labeling

OSHA requirement for flammable storage cabinets: label must state "FLAMMABLE - KEEP FIRE AWAY."

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Flammable Storage Cabinet Construction

OSHA requirements for flammable storage cabinets: metal cabinets must be constructed with 18-gauge sheet iron, double-walled with 1.5-inch air space, and a doorsill 2 inches above the cabinet bottom.

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Flammable Storage Rooms

Specific rooms designed for the safe storage of larger quantities of flammable liquids.

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Fire Extinguisher Placement: Indoor Storage

OSHA requires at least one portable fire extinguisher with a rating of not less than 12-B units to be placed outside of indoor storage rooms.

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Fire Extinguisher Placement: Outdoor Storage

OSHA requires at least one portable fire extinguisher with a rating of not less than 12-B units to be placed not less than 10 feet and not more than 25 feet from a Category 1, 2, or 3 flammable liquid storage area inside a building.

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Flammable Liquid Storage Limits: Outdoor

Up to 1,100 gallons of flammable liquids may be stored next to a building located on the same premises as long as there is at least 10 feet of space between buildings and the nearest container of flammable liquid.

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Outdoor Spill Prevention

The storage area outside must be sloped or graded to keep spills from reaching a building and a curb at least 6 inches high is installed.

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Incompatible Storage: Oxidizing Agents

Flammable liquids should not be stored with oxidizing agents such as chlorates, nitrates, perchlorates, permanganates, and peroxides because they provide the oxygen to accelerate the combustion rate of other chemicals.

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Incompatible Storage: Corrosive Chemicals

Flammable liquids should not be stored with corrosive chemicals such as sulfuric acid (battery acid), acetic acid, and nitric acid.

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Incompatible Storage: Reactive Materials

Flammable liquids should not be stored with materials susceptible to spontaneous heating and/or explosions such as hydrogen peroxide and picric acid.

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Incompatible Storage: Air/Moisture Reactive Materials

Flammable liquids should not be stored with substances that react with air or moisture to create heat.

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Ventilation System

A system that ensures a constant flow of fresh air into a room, required for inside storage rooms to prevent the buildup of flammable vapors.

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Aisle Space

A specific requirement for inside storage rooms that ensures there's enough space for movement and access, especially in case of emergencies.

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Blowout Panels

Designated areas designed to withstand pressure changes and potential explosions.

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Spill Containment

To contain spills of flammable liquids, inside storage rooms require features like sumps, ramps, or dikes.

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Fire Resistance

The amount of time a wall or ceiling can resist the spread of fire, crucial for determining the maximum allowable storage in an inside room.

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29 CFR 1910.106

An OSHA regulation specifically addressing the safe storage of flammable liquids within a facility.

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Total Allowable Quantities

The maximum amount of a flammable liquid allowed in an inside storage room, determined by the room's size, fire resistance rating, and the presence of a sprinkler system.

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Forklift for Flammable Environments

A specific type of forklift designed for handling flammable liquids in hazardous environments.

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3-Foot Wide Aisle

The minimum width required for an aisle in an inside storage room to ensure safe movement and access.

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Study Notes

Flammable Liquids Storage

  • Flammable liquids must be stored in designated cabinets, rooms, or warehouses.
  • Storage amounts depend on the type of business, room size, construction, fire resistance, and fire protection.
  • Storage is prohibited in some areas (e.g., office areas), except for maintenance or operating equipment.
  • "Incidental storage" is an exception for operations where handling flammable liquids is secondary to the main business activity.
  • Examples of incidental storage include automobile assembly and electronics manufacturing.
  • OSHA allows up to 25 gallons of Category 1 flammable liquids and 120 gallons of Category 2, 3, or 4 liquids in an area outside protected storage.
  • It allows up to 660 gallons of Category 2, 3, or 4 flammable liquids in a single portable tank. Local fire marshal or insurance carrier rules may be stricter.
  • OSHA categorizes flammable materials in different categories based on flash points and boiling points.

Container Sizes

  • Table B.6.1 from 29 CFR 1910.1200 outlines criteria for flammable liquids.
  • OSHA specifies maximum container sizes for each category of flammable materials.
  • Container types include glass, metal (except DOT drums), and safety cans.
  • Maximum sizes (in gallons) vary by container type and flammable liquid category.
  • Container exemptions exist for medicines, beverages, food products, cosmetics, and common consumer items packaged according to standard practices.

Storage Cabinets and Rooms

  • Flammable materials must utilize approved fireproof cabinets or storage rooms, with specific criteria set by 29 CFR 1910.106.
  • Cabinets must be labeled "FLAMMABLE – KEEP FIRE AWAY".
  • Metal cabinets must have at least 18-gauge sheet iron, double walls, and a 1.5-inch air space.
  • Doors must be at least 2 inches above the cabinet bottom.
  • Venting of flammable storage cabinets is allowed, but not always required. If not vented, appropriate bungs must be in place.
  • OSHA doesn't require grounding of cabinets. NFPA 77 does, and local fire codes/insurance companies may also require grounding.

Storage Rooms

  • For larger quantities of flammables, special rooms designed for storage are necessary.
  • Key features for these rooms include electrically classified fixtures and wiring; high and low-point ventilation; fire-resistant walls and ceilings; blowout panels; methods for capturing spills; and 6 air changes per hour ventilation.
  • Aisles at least 3 feet wide must be present for room accessibility during an emergency.
  • Storage of containers exceeding 30 gallons in a single indoor storage room is not allowed.
  • Allowable quantities of flammable liquids inside storage rooms depend on the fire resistance rating of the room.

Outside Storage

  • Outdoor storage areas for flammable liquids require adequate fire controls.
  • These include working hoses, portable fire extinguishers, and fire control devices.
  • At least one portable fire extinguisher with a 12-B rating must be present, within 10 feet of the room door and 10-25 feet from the storage area.
  • Up to 1,100 gallons of flammable liquids are permitted near a building, separated by a 10-foot space.

Flammable Liquid Compatibility

  • Flammables should not be stored with oxidizing agents (chlorates, nitrates, perchlorates, permanganates, peroxides).
  • Flammables must also not be stored with corrosive materials (acids, bases).
  • Spontaneous heating/explosion hazards should be avoided.
  • Do not store flammables near heat sources.

Electrical Protection

  • Be aware of the hazards of electricity around flammables.
  • Flammable materials must be at least 25 feet from ignition sources unless separated by a fire resistant barrier.
  • Wire and electrical fixtures around flammable liquids need to meet specifications in §1910 or National Electrical Code.
  • Containers of Category 1, 2, or 3 flammables with flash points below 100°F (37.8°C) require electrical interconnection (bonding) during transfer steps.
  • Grounding and bonding of containers are essential to prevent sparks.

Hot Work

  • Hot work (welding, cutting, power tools) requires supervision by responsible personnel.
  • "Hot work" permits must be obtained before starting work in areas with flammable liquids.
  • The area must be cleared of combustible materials.
  • Fire watch is needed to monitor for potential issues.

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