§179.400-7. Tank heads.

49 C.F.R. § 179.400-7

(a)

Tank heads of the inner tank and outer jacket must be flanged and dished, or ellipsoidal.

(b)

Flanged and dished heads must have—

(1)

A main inside dish radius not greater than the outside diameter of the straight flange;

(2)

An inside knuckle radius of not less than 6 percent of the outside diameter of the straight flange; and

(3)

An inside knuckle radius of at least three times the head thickness.

Notes, amendments, and revision history

Source: Amdt. 179-32, 48 FR 27708, June 16, 1983, unless otherwise noted.

Authority: 49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97.

Source: 29 FR 18995, Dec. 29, 1964, unless otherwise noted. Redesignated at 32 FR 5606, Apr. 5, 1967.