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Critical Applications (Continued)

Anhydrous Ammonia (NH 3 ) Hose IP-11-7 “Manual for Maintenance, Testing, and Inspection
of Chemical Hose.”
Many accidents involving anhydrous ammonia occur
due to selection of an incorrect hose for the application. Handling
Anhydrous ammonia hose must be specially designed
and compounded to handle the media, with a perforated • Use care to prevent mishandling. Crushing or kink-
cover to prevent gas build-up amidst the layers of hose. ing of the hose can cause severe damage to the
Refer to ARPM publications IP-14 “Specifications for reinforcement.
Anhydrous Ammonia Hose” and IP-11-2 “Manual for • Use proper hose suspension equipment when lifting Safety & Technical Information
Use, Maintenance, Testing and Inspection of Anhydrous or dragging a hose to ensure that the recommended
Ammonia Hose.” curvature is not exceeded. Avoid sharp bends at the
end fittings and at manifold connections.
WARNING! Use ONLY anhydrous ammonia hose for
anhydrous ammonia service. Contact with anhydrous Operation
ammonia in its liquid or gaseous (vapor) phase will • Use safety precautions such as wearing eye or face
burn skin, eyes and lungs, causing serious bodily injury protection, rubber gloves, boots, and other types of
or death. protective clothing.
• Do not use anhydrous ammonia hose for LPG service. • Monitor pressures and temperatures to ensure that
It may fail suddenly and quickly. Anhydrous ammonia the hose is not exposed to conditions above specified
hose and LPG hose are frequently used in proximity limits.
and may be accidentally switched. • Do not allow chemicals to contact the exterior of
• Use only Parker permanent crimp couplings when the hose or allow hose to lie in a pool of chemicals
fabricating anhydrous ammonia hose assemblies. since the hose cover may not have the same level of
Refer to CrimpSource at www.safehose.com. corrosion resistance as the tube. Corrosive materials
• Do not use with couplings containing o-rings, which that come into contact with the reinforcing material
may dry out, crack and fail over time. Do not use with will cause reduced service life and premature hose
male swivel couplings or other couplings containing failure.
hidden o-rings.
Temperature
Anhydrous ammonia hose is designed to allow a limited Do not use chemical hose at pressures or temperatures
amount of permeation of gas through the wall of the hose exceeding those as specified for the product. Many
when in service, and staining of the hose cover in the pin- chemical resistance guides are based on temperatures
pricked areas does not necessarily indicate leakage for of 70°F (21°C). Elevated temperatures can change the
a hose in service. However, a visible gas mist escaping chemical resistance ratings. Many chemicals will become
through the hose is an indication of leakage. To verify the more aggressive as temperatures increase, reducing the
integrity of a hose in service, perform a hydrostatic test on ability of hose compounds to withstand them. Contact
the assembly; immediately remove from service any that Parker for chemical compatibility data at elevated
fail the test. temperatures. If no data exists, end users are required to
perform compatibility testing at the desired temperature.
NOTE: For non-agricultural or refrigeration applica-
tions, contact Parker. Couplings
• At any operating temperature, couplings attached with
Chemical Hose bands or clamps may reduce the working pressure of
A chemical hose system failure could cause the release the hose assembly to less than the maximum rated
of poisonous, corrosive, or flammable material resulting working pressure of the hose. Refer to the NAHAD
in property damage, serious bodily injury or death. All Industrial Hose Assembly Guidelines.
reputable manufacturers of chemical hose recommend • At operating temperatures of 125°F and above, install
specific hose constructions to handle various chemicals. only permanently attached couplings.
Refer to the chemical guides in this catalog, or • Do not use internally expanded couplings with
contact Parker for technical assistance before using or chemical hoses incorporating thermoplastic tubes.
recommending a hose product. Refer to ARPM publication Refer to chemical hoses that incorporate a MXLPE
tube.

Parker Industrial Hose Customer Service 399
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