§ 64.17 — Minimum Tank Thickness

(a) Except as allowed in paragraph (b) of this section, a tank with a diameter of—

(1) 6 feet or less must have a shell and head of

3/16 inch thickness or more; or

(2) More than 6 feet must have a shell and head of

1/4 inch thickness or more.

(b) If the tank has additional framework to guard against accidental puncturing of the tank, the shell and head thickness must be

1/8 inch or more.