Parker Hannifin Corporation
Hose Products Division
Wickliffe, OH
19
Technical Manual
Karrykrimp
Bulletin 4480-T30-US
MSDS’S (Available upon request.)
Federal OSHA regulation 29 CFR 1910.1200 requires that we transmit to our customers Material Safety Data Sheets for all material covered
under the law. If you are an employer in SIC 20-39 who has not yet received them, you are required to obtain them from us and provide
the information to employees as directed in Section (b) of the regulation. Please contact the Hose Products Division - Technical Services
Department: (PH) 440- 943-5700 (FAX) 440- 943-3129.
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 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 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 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 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 fluid media comes in contact with hot surfaces, open flame or sparks, a fire
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 fire 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 insufficient 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 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 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 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 specific 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 fluid 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 fluids to transfer energy and do work. Hoses, Fittings 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 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 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 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 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 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 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, corrosive liquids or fumes,
solvents, high humidity,
rodents, insects, ultraviolet light, electromagnetic fields or radioactive
materials.
Safety Guide for Selecting and Using Hose, Fittings and Related Accessories
www.comoso.com
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