MIL-HDBK-1022A
10.3.2.11 Nozzles. Use the industry standard nozzle. It
comes in three pressure ranges: 2,400 psig (16 500 kPa),
3,000 psig (21 000 kPa), and 3,600 psig (25 000 kPa). These
nozzles are designed so that a fill system cannot connect to a
vehicle tank with a lower pressure rating, yet it can connect
to vehicle tanks with higher ratings.
10.3.2.12 Environmental Considerations
a) The compressor unit's receiver is usually blown-
down automatically, releasing about 0.06 gallons (0.2 L) of
oil to the base and subsequently the ground. Discharges from
other components, such as intercoolers, add to the
contamination. Therefore, drip gutters with drains are
required at each corner of the base. Develop a means of
collection and retention of these wastes. Deactivating the
automatic dump features and manually draining is an
alternative to a collection system.
b) Provide gas recovery system as part of the
compressor package to recover gas into an ASME recapture tank
when off-loading the compressor.
c) At the dispenser, provide a vent 8 feet (2.4 m)
to 10 feet (3 m) above ground level to discharge vent gas from
dispenser hoses. Oversize the conduit from the dispenser to
the cascade for a vent line to a future gas recovery system.
d) Locate units with care because of noise.
Use
landscaping to conceal units and attenuate the sound.
e) Natural gas engine drives, if used, may require
an air emissions permit.
10.3.2.13 Weather. As a minimum, protect compressor units
from the weather with a canopy. In colder climates, use a
heated shelter/enclosure with sound attenuation. Some vendors
have enclosures as normal options. Costs vary widely
depending on the degree of protection. Enclosures may require
ventilation and Class I, Division 1 classified electrical
components. They should also be accessible by inspectors and
servicing personnel. In lieu of a heated facility/enclosure,
crankcase heaters and/or circulating block heaters may be
suitable in moderately cold climates.
181
Previous Page
