46 CFR § 30.10-25
Flame screen—TB/ALL
April 15, 2021
The term flame screen means a fitted single screen of corrosion-resistant wire of at least 30 by 30 mesh, or two fitted screens, both of corrosion-resistant wire, of at least 20 by 20 mesh, spaced not less than 1⁄2 inch or more than 11⁄2 inches apart.