Frequently Asked Questions
The Frequently Asked Questions below have been compiled and grouped by topic.
In some cases, the same question and answer pair may be in more than one FAQ group to help you locate the information.
Working with PHMSA
Hazardous Materials Safety
- Hazardous Materials Information Center (HMIC)
- Hazardous Materials Safety FAQs
- Training FAQs
- Security Training FAQs
- Cylinder Approvals: Overfilling Prevention Device (OPD)
- Fireworks Approvals
- Special Permits
- PHMSA's Online CFR (oCFR)
Updated: Monday, August 7, 2017