View all text of Subpart J [§ 178.318 - § 178.348-5]
§ 178.338-6 - Manholes.
(a) Each tank in oxygen service must be provided with a manhole as prescribed in Section VIII of the ASME Code (IBR, see § 171.7 of this subchapter).
(b) Each tank having a manhole must be provided with a means of entrance and exit through the jacket, or the jacket must be marked to indicate the manway location on the tank.
(c) A manhole with a bolted closure may not be located on the front head of the tank.