Page 38 - ParkerPVCHose

Catalog 4830
Parker Hannifin Corporation 36 www.parker.com/indhose
Industrial Hose Division IHP Customer Service: 440-268-2400
Strongsville, OH Toll Free (866) 810-HOSE or 866-810-4673
Fittings on the Hose. These instructions are provided in the Parker Fitting
catalog for the specific Parker Fitting being used, or by calling 1-800-
CPARKER, or at www.parker.com.
3.3 Related Accessories: Do not crimp or swage any Parker Hose or Fitting
with anything but the listed swage or crimp machine and dies in accor-
dance with Parker published instructions. Do not crimp or swage another
manufacturer’s Fitting with a Parker crimp or swage die unless authorized
in writing by the engineering manager or chief engineer of the appropriate
Parker division.
3.4 Parts: Do not use any Parker Fitting part (including but not limited to
socket, shell, nipple, or insert) except with the correct Parker mating parts,
in accordance with Parker published instructions, unless authorized in
writing by the engineering manager or chief engineer of the appropriate
Parker division.
3.5 Reusable/Permanent: Do not reuse any field attachable (reusable) Hose
Fitting that has blown or pulled off a Hose. Do not reuse a Parker perma-
nent Hose Fitting (crimped or swaged) or any part thereof. Complete
Hose Assemblies may only be reused after proper inspection under sec-
tion 4.0. Do not assemble Fittings to any previously used hydraulic Hose
that was in service, for use in a fluid power application.
3.6 Pre-Installation Inspection: Prior to installation, a careful examination
of the Hose Assembly must be performed. Inspect the Hose Assembly for
any damage or defects. Do NOT use any Hose Assembly that displays
any signs of nonconformance.
3.7 Minimum Bend Radius: Installation of a Hose at less than the minimum
listed bend radius may significantly reduce the Hose life. Particular atten-
tion must be given to preclude sharp bending at the Hose to Fitting junc-
ture. Any bending during installation at less than the minimum bend ra-
dius must be avoided. If any Hose is kinked during installation, the Hose
must be discarded.
3.8 Twist Angle and Orientation: Hose Assembly installation must be such
that relative motion of machine components does not produce twisting.
3.9 Securement: In many applications, it may be necessary to restrain, pro-
tect, or guide the Hose to protect it from damage by unnecessary flexing,
pressure surges, and contact with other mechanical components. Care
must be taken to insure such restraints do not introduce additional stress
or wear points.
3.10 Proper Connection of Ports: Proper physical installation of the Hose
Assembly requires a correctly installed port connection insuring that no
twist or torque is transferred to the Hose when the Fittings are being tight-
ened or otherwise during use.
3.11 External Damage: Proper installation is not complete without insuring
that tensile loads, side loads, kinking, flattening, potential abrasion, thread
damage, or damage to sealing surfaces are corrected or eliminated. See
instruction 2.10.
3.12 System Checkout: All air entrapment must be eliminated and the sys-
tem pressurized to the maximum system pressure (at or below the Hose
maximum working pressure) and checked for proper function and free-
dom from leaks. Personnel must stay out of potential hazardous areas
while testing and using.
3.13 Routing: The Hose Assembly should be routed in such a manner so if a
failure does occur, the escaping media will not cause personal injury or
property damage. In addition, if fluid media comes in contact with hot
surfaces, open flame, or sparks, a fire or explosion may occur. See sec-
tion 2.4.
4.0 HOSE AND FITTING MAINTENANCE AND REPLACEMENT INSTRUC-
TIONS
4.1 Even with proper selection and installation, Hose life may be significantly
reduced without a continuing maintenance program. The severity of the
application, risk potential from a possible Hose failure, and experience
with any Hose failures in the application or in similar applications should
determine the frequency of the inspection and the replacement for the
Products so that Products are replaced before any failure occurs. Amain-
tenance program must be established and followed by the user and, at
minimum, must include instructions 4.2 through 4.7.
4.2 Visual Inspection Hose/Fitting: Any of the following conditions require
immediate shut down and replacement of the Hose Assembly:
• Fitting slippage on Hose;
• Damaged, cracked, cut or abraded cover (any reinforcement exposed);
• Hard, stiff, heat cracked, or charred Hose;
• Cracked, damaged, or badly corroded Fittings;
• Leaks at Fitting or in Hose;
• Kinked, crushed, flattened or twisted Hose; and
• Blistered, soft, degraded, or loose cover.
4.3 Visual Inspection All Other: The following items must be tightened,
repaired, corrected or replaced as required:
• Leaking port conditions;
• Excess dirt buildup;
• Worn clamps, guards or shields; and
• System fluid level, fluid type, and any air entrapment.
4.4 Functional Test: Operate the system at maximum operating pressure
and check for possible malfunctions and leaks. Personnel must avoid
potential hazardous areas while testing and using the system. See sec-
tion 2.2.
4.5 Replacement Intervals: Hose assemblies and elastomeric seals used
on Hose Fittings and adapters will eventually age, harden, wear and dete-
riorate under thermal cycling and compression set. Hose Assemblies and
elastomeric seals should be inspected and replaced at specific replace-
ment intervals, based on previous service life, government or industry
recommendations, or when failures could result in unacceptable down-
time, damage, or injury risk. See section 1.2.
4.6 Hose Inspection and Failure: Hydraulic power is accomplished by uti-
lizing high-pressure fluids to transfer energy and do work. Hoses, Fit-
tings, and Hose Assemblies 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 circum-
stances 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 prop-
erties 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 As-
sembly. Simply shutting down the hydraulic pump may or may not elimi-
nate the pressure 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
blindness 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 Hose Assemblies should
be tested after installation and before use, and at least on a monthly basis
per AGA 1-93 Section 4.2 “Visual Inspection Hose/Fitting”. The recom-
mended 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.
Parker Safety Guide