3.14.1 Each enclosed space used for handling or
storage of a liquefied gas should be fitted with a sensor continuously
monitoring the oxygen content of the space and an alarm indicating
low oxygen concentration. For semi-enclosed spaces portable equipment
may also be acceptable.
3.14.2 Drip trays resistant to cryogenic temperatures
should be provided at manifolds transferring liquefied gases or at
other flanged connections in the liquefied gas system.
3.14.3 For the carriage of liquid nitrogen the
requirements of 17.19 of the International
Gas Carrier Code should apply.
3.14.4 The construction of cargo tanks and cargo
piping systems for liquefied nitrogen and liquid carbon dioxide should
be to the satisfaction of the Administration.
3.14.5 Emergency shutoff valves should be provided
in liquid outlet lines from each liquefied gas tank. The controls
for the emergency shutoff valves should meet the requirements given
in 3.7.2 for remote shutdown
devices.