Page 414 - Cat4800-Oct2011

400 Parker Industrial Hose Customer Service
866 810 HOSE (4673) 800 242 HOSE (4673)
Strongsville, OH South Gate, CA
Eastern USA Western USA
www.safehose.com
e-mail: indhose@parker.com
Safety & Technical Information
Gasoline Dispenser Hose
Millions of consumers operate gasoline pumps every
day, increasing the concern for the safe use of dispensing
equipment, including the hose. Since gasoline dispenser
hoses are subject to frequent abuse, hose selection must
include consideration of the rigors of the application. For
maximum service life, select only the highest quality, most
thoroughly tested UL listed hose and establish a regular
inspection and maintenance program. Refer to ARPM
publication IP-11-8 “Manual for Maintenance, Testing,
and Inspection of Petroleum Service Station Gasoline
Dispensing Hose and Hose Assemblies.”
Note: To avoid fuel contamination do not use gasoline
dispenser or farm pump hose to fuel aircraft.
LP Gas (Propane) Hose
Many accidents involving LP Gas occur due to selection of
an incorrect hose for the application. LP Gas hose must be
specially designed and compounded to handle the media,
with a perforated cover to prevent gas build-up amidst the
layers of the hose.
WARNING! Use ONLY LP Gas hose for LP Gas
service. LP Gas possesses volatile characteristics
that may produce fre or explosions causing property
damage, serious bodily injury or death.
• Do not use LP Gas hose for anhydrous ammonia
service. It may fail suddenly and quickly. Anhydrous
ammonia hose and LPG hose are frequently use in
proximity and may be accidentally switched.
• Use only Parker permanent crimp couplings
when fabricating LP Gas hose assemblies. Refer
to CrimpSource at www.safehose.com. Couplings
attached with bands or clamps may reduce the
working pressure of the hose assembly to less than the
maximum rated working pressure of the hose. Refer to
the NAHAD Industrial Hose Assembly Guidelines.
• Do not use with couplings containing o-rings, which
may dry out, crack and fail over time. Do not use with
male swivel couplings or other couplings containing
hidden o-rings.
• Donot usewithscrew-together reattachable couplings
(except hose Series 7233/7243).
LP Gas hose is designed to allow a limited amount of
permeation of LP Gas through the wall of the hose when
in service. Te permeation is apparent when the hose
is moist or in water, and bubbles may be perceived as
leakage. However, a legitimate propane leak creates a
frosting or icing on the surface of the hose or coupling.
To verify the integrity of a hose in service, perform a
hydrostatic test on the assembly; immediately remove
from service any hose that fails the test. In the transfer
of LP Gas, the allowable permeation rate is controlled by
the Underwriters Laboratories Standard UL21 for LP Gas
Hose.
Department of Transportation (DOT) and LP
Gas Hose
LP Gas hose assemblies installed on on-road vehicles
must meet DOT requirements. Parker factory assemblies
3/4" ID and larger undergo pressure testing as standard
procedure (smaller sizes are tested per customer request),
one of the fttings is etchedwith a uniqueDOT certifcation
number, and a document incorporating the identical
certifcation number accompanies each assembly. Metal
DOT identifcation bands are also available/attached for
an additional charge at customer request. Contact Parker.
NOTE: When using LP Gas hose in a mobile application
such as delivery or service vehicles, the inspection
procedures detailed in DOT regulation 49CFR 180.416
must be strictly followed.
Natural Gas and LP Gas Hose
Te molecules of natural gas are small, enhancing their
ability to permeate through standard rubber or PVC
hose constructions. Te permeation process is more
rapid as the working pressure increases, and natural gas
accumulates with potentially dangerous consequences.
Series 7132, 7132XTC, 7170, 7231, 7232, 7233 and 7243
LP Gas hoses may be used for natural gas service to a
350 psi maximum, but ONLY under ALL of the following
conditions:
• Use only in a well-ventilated environment: Outdoors,
or indoors with signifcant continuous air movement.
• Do not use LP Gas hose to replace fxed/rigid pipe
where that material is more appropriate due to
reduced permeation, overall strength and durability.
Use rigid pipe, non-permeable tubing or hose with
barrier constructions to convey natural gas whenever
possible.
Compressed Natural Gas (CNG) and
LP Gas Hose
• Do not use LP Gas hose in any CNG application,
including fuel dispensing, on-board vehicle fuel lines,
and fuel transfer.
Critical Applications (Continued)