Page 411 - Cat4800-Oct2011

397 Parker Industrial Hose Customer Service
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
Safety & T
echnical Information
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 accor-
dance 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: 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 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 maxi-
mum 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 515:1989 (www.ansi.org) standard for
heating cables recommends the use of GFEPDs with a nominal 30 milli-
ampere trip level for “piping systems in classifed 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 signifcantly
reduced without a continuing maintenance program. The severity of the ap-
plication, 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 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, 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.
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 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 fuid. 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 fuid under pressure. The high pressure fuid 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 refrig-
eration 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
ANSI/IAS NGV 4.2-1999; CSA 12.52-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 fame 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 frst-in and frst-out usage based on manufacturing
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 polytetrafuoroethylene 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, corrosive liquids
or fumes, solvents, high humidity, rodents, insects, ultraviolet light, electro-
magnetic felds or radioactive materials.
Parker Safety Guide, Parker Publication No. 4400-B.1 (Continued)