(a) Liquid level gauging devices. See Sec. 173.315(h) of this subchapter.
(b) Pressure gauges. (1) See Sec. 173.315(h) of this subchapter.
(1) See Sec. 173.315(h) of this subchapter.
(2) Each cargo tank used in carbon dioxide, refrigerated liquid or nitrous oxide, refrigerated liquid service must be provided with a suitable pressure gauge. A shut-off valve must be installed between the pressure gauge and the cargo tank.
(c) Orifices. See Sec. 173.315(h) (3) and (4) of this subchapter. [Amdt. 178-29, 38 FR 27599, Oct. 5, 1973, as amended by Amdt. 178-89, 54 FR 25018, June 12, 1989; Amdt. 178-118, 61 FR 51340, Oct. 1, 1996]