Storage and Handling of Category 3 and 4 Flammables
Category 3 and 4 flammables, previously identified as “combustibles,” have higher flash points than category 1 and 2 flammables, which means that they require higher temperatures to produce vapors that will ignite and burn if an ignition source is present. To safely store and handle combustible liquids, make sure you read and understand their labels and safety data sheets, and fully understand their hazards. Also follow the combustible liquid storage and handling best practices in this course and for your workplace.





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Course Details
Learning Objectives
• Define the terms “flash point” and “boiling point” • Differentiate between “combustibles” and “flammables” • Describe how flammables and combustibles are categorized • Describe the workplace requirements for hazardous chemicals in OSHA’s HazCom Standard • Describe how flammability is indicated on chemical labels • Identify the characteristics of combustibles which make them especially hazardous • List storage and handling best practices for combustibles
Specs
Frequently Asked Questions
What is the difference between flash point and boiling point?
What is the HazCom (Hazard Communication) standard?
Do storage rooms used to store combustible liquids have any special requirements?
Why is it important to keep combustible liquid containers closed when not in use?
Does the HazCom Standard specify what chemical labels should look like?
Sample Video Transcript
• Make sure all storage areas comply with all applicable rules and requirements, including building, fire, and electrical codes, for the site or location • Store spill cleanup supplies nearby, and clean up liquid spills and drips immediately • If a container is leaking, damaged, or shows signs of deterioration, remove it to a storage room or safe outside location and transfer the contents to an undamaged container. If dispensing from a metal container, make sure it is bonded and grounded. • When using flammables away from a storage area, adhere to OSHA quantity and usage guidelines • Make sure that all chemicals are disposed of properly, adhering to all current applicable rules and regulations
Additional Resources
- Occupational Safety and Health Administration (OSHA) – www.osha.gov
- OSHA Standards – https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=standards&p_id=10099
- OSHA Publications – https://www.osha.gov/Publications/OSHA2236/osha2236.html