CFR › Title 46 › Part 32 › §32.20-1046 CFR §32.20-10Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkFlame arresters must be of a type and size suitable for the purpose intended and meet ASTM F 1273 (incorporated by reference, see § 32.01-1).