- (a) Manway covers must be of approved type.
- (b) Manway covers shall be designed to provide a secure closure of the manway.
- (c) Manway covers must be of approved cast, forged, or fabricated metals. Malleable iron, if used, must comply with ASTM A 47 (IBR, see § 171.7 of this subchapter), Grade 35018. Cast iron manway covers must not be used.
- (d) All joints between manway covers and their seats shall be made tight against leakage of vapor and liquid by use of gaskets of suitable material.
- (e) For other manway cover requirements see § 179.201-1.
[29 FR 18995, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 179-10, 36 FR 21350, Nov. 6, 1971; Amdt. 179-37, 50 FR 11066, Mar. 19, 1985; 68 FR 75762, Dec. 31, 2003]