Intro
PFA
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FEP
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PVDF
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PTFE
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Index
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Technical
Pages
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Parker Hannifin Corporation
| Parflex
®
Division, TexLoc | Fort Worth, Tx |
www.texloc.com
For detailed ordering information, please consult price list or contact Parker Texloc.
F10
Safety Guide
4.6
Hose Inspection and Failure: Hydraulic power is accomplished by utiliz-
ing high pressure fluids to transfer energy and do work. Hoses, Fittings and
HoseAssemblies all contribute to this by transmitting fluids at high pressures.
Fluids under pressure can be dangerous and potentially lethal and, therefore,
extreme caution must be exercised when working with fluids under pressure
and handling the Hoses transporting the fluids. From time to time, Hose
Assemblies will fail if they are not replaced at proper time intervals. Usually
these failures are the result of some form of misapplication, abuse, wear or
failure to perform proper maintenance. When Hoses fail, generally the high
pressure fluids inside escape in a stream which may or may not be visible to
the user. Under no circumstances should the user attempt to locate the leak
by “feeling” with their hands or any other part of their body. High pressure
fluids can and will penetrate the skin and cause severe tissue damage and
possibly loss of limb. Even seemingly minor hydraulic fluid injection injuries
must be treated immediately by a physician with knowledge of the tissue
damaging properties of hydraulic fluid.
If a Hose failure occurs, immediately shut down the equipment and leave the
area until pressure has been completely released from the Hose Assembly.
Simply shutting down the hydraulic pump may or may not eliminate the pres-
sure in the Hose Assembly. Many times check valves, etc., are employed in
a system and can cause pressure to remain in a Hose Assembly even when
pumps or equipment are not operating. Tiny holes in the Hose, commonly
known as pinholes, can eject small, dangerously powerful but hard to see
streams of hydraulic fluid. It may take several minutes or even hours for the
pressure to be relieved so that the Hose Assembly may be examined safely.
Once the pressure has been reduced to zero, the Hose Assembly may be
taken off the equipment and examined. It must always be replaced if a
failure has occurred. Never attempt to patch or repair a Hose Assembly that
has failed. Consult the nearest Parker distributor or the appropriate Parker
division for Hose Assembly replacement information.
Never touch or examine a failed Hose Assembly unless it is obvious that
the Hose no longer contains fluid under pressure. The high pressure fluid
is extremely dangerous and can cause serious and potentially fatal injury.
4.7
Elastomeric seals: Elastomeric seals will eventually age, harden, wear
and deteriorate under thermal cycling and compression set. Elastomeric
seals should be inspected and replaced.
4.8
Refrigerant gases: Special care should be taken when working with
refrigeration systems. Sudden escape of refrigerant gases can cause blind-
ness if the escaping gases contact the eye and can cause freezing or other
severe injuries if it contacts any other portion of the body.
4.9
Compressed natural gas (CNG): Parker CNG HoseAssemblies should
be tested after installation and before use, and at least on a monthly basis
per ANSI/IAS NGV 4.2-1999; CSA12.52-M99 Section 4.2 “Visual Inspection
Hose/Fitting”. The recommended procedure is to pressurize the Hose and
check for leaks and to visually inspect the Hose for damage.
Caution: Matches, candles, open flame or other sources of ignition shall
not be used for Hose inspection. Leak check solutions should be rinsed
off after use.
5.0
HOSE STORAGE
5.1
Age Control: Hose and Hose Assemblies must be stored in a manner
that facilitates age control and first-in and first-out usage based on manu-
facturing date of the Hose and Hose Assemblies. The shelf life of rubber
Hose or Hose Assemblies that have passed visual inspection and a proof
test is 10 years (40 quarters) from the date of manufacture. The shelf life
of thermoplastic and polytetrafluoroethylene Hose or Hose Assemblies is
considered to be unlimited.
5.2
Storage: Stored Hose and Hose Assemblies must not be subjected
to damage that could reduce their expected service life and must be placed
in a cool, dark and dry area with the ends capped. Stored Hose and Hose
Assemblies must not be exposed to temperature extremes, ozone, oils, cor-
rosive liquids or fumes, solvents, high humidity, rodents, insects, ultraviolet
light, electromagnetic fields or radioactive materials.