Page 81 - ParkerMULTITUBE

78
Parker Hannifn Corporation
Parfex Division
Ravenna, OH
Catalog Number 4200-M-2 General Technical Information
3.3 Related Accessories: Do not crimp or swage any Parker Hose or Fitting
withanythingbut the listedswageor crimpmachineanddies inaccordance
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 engineeringmanager or chief engineer of the appropriate
Parker division.
3.4 Parts:Donot useanyParkerFittingpart (includingbut not limited tosocket,
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 hasblownor pulledoff aHose.Donot reuseaParker permanent
Hose Fitting (crimped or swaged) or any part thereof. Complete Hose
Assembliesmay 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 fluid power application.
3.6 Pre-Installation Inspection: Prior to installation, a careful examination of
theHoseAssemblymust beperformed. Inspect theHoseAssembly 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
attention must be given to preclude sharp bending at the Hose to Fitting
juncture. Any bending during installation at less than the minimum bend
radiusmust 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,
protect, 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
tightened or otherwise during use.
3.11 ExternalDamage: Proper installation isnot completewithout 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 SystemCheckout: All air entrapment must be eliminated and the system
pressurized to the maximum system pressure (at or below the Hose
maximumworkingpressure) andchecked for proper functionand 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 fluid media comes in contact with hot
surfaces, open flame, or sparks, a fireor explosionmayoccur. Seesection
2.4.
3.14 Ground Fault Equipment Protection Devices (GFEPDs):
WARNING! Fire and shock hazard. To minimize the danger of fire
if the heating cable is damaged or improperly installed, use a Ground
Fault Equipment Protection Device. Electrical fault currents may be
insufficient to trip a conventional circuit breaker.
3.14a Ground Fault Protection: The IEEE standard (515-1989) for
heating cables recommends the use of GFEPDs with a nominal 30
milliampere trip level for “piping systems in classified areas, those
areas requiring a high degree of maintenance, 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 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. A
maintenance programmust 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 abradedcover (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 thesystematmaximumoperatingpressureand
check for possiblemalfunctions and leaks. Personnel must avoidpotential
hazardous areas while testing and using the system. See section 2.2.
4.5 Replacement Intervals: Hoseassembliesandelastomeric sealsusedon
HoseFittingsandadapterswill eventuallyage,harden,wearanddeteriorate
under thermal cycling and compression set. Hose Assemblies and
elastomericsealsshouldbe inspectedandreplacedat specificreplacement
intervals, based on previous service life, government or industry
recommendations, orwhen failurescouldresult inunacceptabledowntime,
damage, or injury risk. See section 1.2.
4.6 Hose Inspection and Failure : Hydraulic power is accomplished by
utilizing high-pressure fluids to transfer energy and do work. Hoses,
Fittings, and Hose Assemblies all contribute to this by transmitting fluids
at highpressures. Fluidsunder pressurecanbedangerousandpotentially
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
streamwhichmayormaynot bevisible to theuser.Undernocircumstances
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 pressure in the Hose Assembly. Many times check valves,
etc., areemployed inasystemandcancausepressure to remain inaHose
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
failurehasoccurred.Never attempt topatchor repair aHoseAssembly that
has failed. Consult thenearest Parker distributor or theappropriateParker
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 CompressedNatural Gas (CNG) : Parker CNGHoseAssemblies should
be tested after installation and before use, and at least on amonthly basis
per AGA 1-93 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.
4.10 Matches, candles, open flameor other sourcesof ignitionshall not beused
for Hose inspection. Leak check solutions should be rinsed off after use.