Which resource is best for understanding explosion vent sizing and design criteria?

The best resource for understanding explosion vent sizing and design criteria is NFPA 68. This standard specifically addresses the design and installation of explosion venting systems. NFPA 68 provides detailed guidance on how to calculate vent areas, the materials suitable for vents, and installation requirements to ensure safety during an explosion event. It is widely recognized and used across industries for ensuring compliance with safety regulations pertaining to explosive hazards.

The other options do not focus on vent sizing and design criteria in the same way. OSHA 1910 sets forth general safety and health regulations but does not provide specific standards related to explosion venting. NEPA 68 does not exist in the context of explosion hazards, which may lead to confusion. API 2000 covers pressure-relieving and vapour control systems in the petroleum and chemical industries but does not specifically address the nuances of explosion vent design as detailed by NFPA 68. Thus, NFPA 68 is the most relevant and authoritative guideline for this purpose.