Page 413 - Cat4800-Oct2011

399 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 & T
echnical Information
Anhydrous Ammonia (NH3) Hose
Many accidents involving anhydrous ammonia occur
due to selection of an incorrect hose for the application.
Anhydrous ammonia hose must be specially designed
and compounded to handle the media, with a perforated
cover to prevent gas build-up amidst the layers of hose.
Refer to ARPM publications IP-14 “Specifcations for
Anhydrous Ammonia Hose” and IP-11-2 “Manual for
Use, Maintenance, Testing and Inspection of Anhydrous
Ammonia Hose.”
WARNING! UseONLYanhydrous ammoniahose for
anhydrous ammonia service. Contact with anhydrous
ammonia in its liquid or gaseous (vapor) phase will
burn skin, eyes and lungs, causing serious bodily injury
or death.
• Do not use anhydrous ammonia hose for LPG service.
It may fail suddenly and quickly. Anhydrous ammonia
hose and LPG hose are frequently used in proximity
and may be accidentally switched.
• Use only Parker permanent crimp couplings when
fabricating anhydrous ammonia hose assemblies.
Refer to CrimpSource at www.safehose.com.
• 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.
Anhydrous ammonia hose is designed to allow a limited
amount of permeation of gas through the wall of the hose
when in service, and staining of the hose cover in the pin-
pricked areas does not necessarily indicate leakage for
a hose in service. However, a visible gas mist escaping
through the hose is an indication of leakage. To verify the
integrity of a hose in service, perform a hydrostatic test on
the assembly; immediately remove from service any that
fail the test.
NOTE: For non-agricultural or refrigeration applica-
tions, contact Parker.
Chemical Hose
A chemical hose system failure could cause the release
of poisonous, corrosive, or fammable material resulting
in property damage, serious bodily injury or death. All
reputable manufacturers of chemical hose recommend
specifc hose constructions to handle various chemicals.
Refer to the chemical guides in this catalog, or
contact Parker for technical assistance before using or
recommending a hose product. Refer toARPMpublication
IP-11-7 “Manual for Maintenance, Testing, and Inspection
of Chemical Hose.”
Handling
• Use care to prevent mishandling. Crushing or kink-
ing of the hose can cause severe damage to the
reinforcement.
• Use proper hose suspension equipment when lifting
or dragging a hose to ensure that the recommended
curvature is not exceeded. Avoid sharp bends at the
end fttings and at manifold connections.
Operation
• Use safety precautions such as wearing eye or face
protection, rubber gloves, boots, and other types of
protective clothing.
• Monitor pressures and temperatures to ensure that
the hose is not exposed to conditions above specifed
limits.
• Do not allow chemicals to contact the exterior of
the hose or allow hose to lie in a pool of chemicals
since the hose cover may not have the same level of
corrosion resistance as the tube. Corrosive materials
that come into contact with the reinforcing material
will cause reduced service life and premature hose
failure.
Temperature
Do not use chemical hose at pressures or temperatures
exceeding those as specifed for the product. Many
chemical resistance guides are based on temperatures
of 70°F (21°C). Elevated temperatures can change the
chemical resistance ratings. Many chemicals will become
more aggressive as temperatures increase, reducing the
ability of hose compounds to withstand them. Contact
Parker for chemical compatibility data at elevated
temperatures. If no data exists, end users are required to
perform compatibility testing at the desired temperature.
Couplings
• At any operating temperature, couplings attachedwith
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.
• At operating temperatures of 125°F and above, install
only permanently attached couplings.
• Do not use internally expanded couplings with
chemical hoses incorporating thermoplastic tubes.
Refer to chemical hoses that incorporate a MXLPE
tube.
Critical Applications (Continued)