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Hose Products Division
Parker Hannifn Corporation
Wickliffe, Ohio
Technical
Catalog 4400 US
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3.9
Securement: In many applications, it may be necessary to restrain,
protect, or guide the Hose to protect it from damage by unnecessary fexing,
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 tightened or otherwise
during use..
3.11
External Damage: Proper installation is not complete without insuring
that tensile loads, side loads, kinking, fattening, 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
system pressurized to the maximum system pressure (at or below the Hose
maximum working pressure) and checked for proper function and freedom 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 fuid media comes in contact with hot surfaces, open fame
or sparks, a fre or explosion may occur. See section 2.4.
3.14
Ground Fault Equipment Protection Devices (GFEPDs): WARNING!
Fire and Shock Hazard: To minimize the danger of fre if the heating cable of a
Multitube bundle is damaged or improperly installed, use a Ground Fault Equipment
Protection Device. Electrical fault currents may be insuffcient to trip a conventional
circuit breaker.
For ground fault protection, the IEEE 515:198
tandard for heating
cables recommends the use of GFEPDs with a nominal 30 milliampere trip level for
“piping systems in classifed areas, those areas requiring a high degree of main-
tenance, or which may be exposed to physical abuse or corrosive atmospheres”.
4.0
HOSE AND FITTING MAINTENANCE AND REPLACEMENT
INSTRUCTIONS
4.1
Even with proper selection and installation, Hose life may be signif-
cantly 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 fre-
quency of the inspection and the replacement for the Products so that Products are
replaced before any failure occurs. A maintenance 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 ex-
posed);
• Hard, stiff, heat cracked, or charred Hose;
• Cracked, damaged, or badly corroded Fittings;
• Leaks at Fitting or in Hose;
• Kinked, crushed, fattened 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 fuid level, fuid 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 section 2.2.
4.5
Replacement Intervals: Hose assemblies and elastomeric seals used
on Hose Fittings and adapters will eventually age, harden, wear and deteriorate
under thermal cycling and compression set. Hose Assemblies and elastomeric
seals should be inspected and replaced at specifc replacement intervals, based
on previous service life, government or industry recommendations, or when failures
could result in unacceptable downtime, damage, or injury risk. See section 1.2.
Hose and Fittings may be subjected to internal mechanical and/or chemical wear
from the conveying fuid and may fail without warning. The user must determine
the product life under such circumstances by testing. Also see section 2.5.
See section 1.2.
4.6
Hose Inspection and Failure: Hydraulic power is accomplished by
utilizing high pressure fuids to transfer energy and do work. Hoses, Fittings and
Hose Assemblies all contribute to this by transmitting fuids at high pressures.
Fluids under pressure can be dangerous and potentially lethal and, therefore,
extreme caution must be exercised when working with fuids under pressure and
handling the Hoses transporting the fuids. 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 fuids 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 fuids can and will penetrate the skin and cause
severe tissue damage and possibly loss of limb. Even seemingly minor hydraulic
fuid injection injuries must be treated immediately by a physician with knowledge
of the tissue damaging properties of hydraulic fuid.
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
Safety Guide
Hose or a Parker Hose on another manufacturer’s Fitting unless (i) the engineer-
ing manager or chief engineer of the appropriate Parker division approves the
Assembly in writing or that combination is expressly approved in the appropriate
Parker literature for the specifc Parker product, and (ii) the user verifes the As-
sembly and the application through analysis and testing. For Parker Hose that
does not specify a Parker Fitting, the user is solely responsible for the selection of
the proper Fitting and Hose Assembly procedures. See instruction 1.4.
To prevent the possibility of problems such as leakage at the Fitting or system
contamination, it is important to completely remove all debris from the cutting
operation before installation of the Fittings. The Parker published instructions
must be followed for assembling the Fittings on the Hose. These instructions are
provided in the Parker Fitting catalog for the specifc Parker Fitting being used, or
by calling 1 800 CPARKER, or at
3.3
Related Accessories: Do not crimp or swage any Parker Hose or Fit-
ting with anything but the listed swage or crimp machine and dies in accordance
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 engi-
neering 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
Field Attachable/Permanent: Do not reuse any feld attachable Hose
Fitting that has blown or pulled off a Hose. Do not reuse a Parker permanent
Hose Fitting (crimped or swaged) or any part thereof. Complete Hose Assemblies
may only be reused after proper inspection under section 4.0. Do not assemble
Fittings to any previously used hydraulic Hose that was in service, for use in a
fuid 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 signifcantly reduce the Hose life. Particular attention must
be given to preclude sharp bending at the Hose to Fitting juncture. Any bending
during installation at less than the minimum bend radius must be avoided. If any
Hose is kinked during installation, the Hose must be discarded.
3.8
Twist Angle and Orientation: HoseAssembly installation must be such
that relative motion of machine components does not produce twisting.
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