49 CFR § 179.202-4 - Thickness of plates.

§ 179.202-4 Thickness of plates.

The wall thickness after the forming of the tank shell and heads must be, at a minimum, 9/16 of an inch AAR TC–128 Grade B, normalized steel, in accordance with § 179.200–7(b).

[80 FR 26749, May 8, 2015]