Parker Hannifin Corporation
Hose Products Division
Wickliffe, OH
18
Technical Manual
Karrykrimp
Bulletin 4480-T30-US
2.3 Suction: Hoses used for suction applications must be selected to insure that the Hose will
withstand the vacuum and pressure of the system. Improperly selected Hose may collapse
in suction application.
2.4 Temperature: Be certain that fluid and ambient temperatures, both steady and
transient, do not exceed the limitations of the Hose. Temperatures below and above the
recommended limit can degrade Hose to a point where a failure may occur and release
fluid. Properly insulate and protect the Hose Assembly when routing near hot objects
(e.g. manifolds). Do not use any Hose in any application where failure of the Hose could
result in the conveyed fluids (or vapors or mist from the conveyed fluids) contacting any
open flame, molten metal, or other potential fire ignition source that could cause burning
or explosion of the conveyed fluids or vapors.
2.5 Fluid Compatibility: Hose Assembly selection must assure compatibility of the
Hose tube, cover, reinforcement, and Fittings with the fluid media used. See the fluid
compatibility chart in the Parker publication for the product being considered or used.
This information is offered only as a guide. Actual service life can only be determined by
the end user by testing under all extreme conditions and other analysis.
Hose that is chemically compatible with a particular fluid must be assembled using
Fittings and adapters containing likewise compatible seals.
2.6 Permeation: Permeation (that is, seepage through the Hose) will occur from inside the
Hose to outside when Hose is used with gases, liquid and gas fuels, and refrigerants
(including but not limited to such materials as helium, diesel fuel, gasoline, natural
gas, or LPG). This permeation may result in high concentrations of vapors which are
potentially flammable, explosive, or toxic, and in loss of fluid. Dangerous explosions,
fires, and other hazards can result when using the wrong Hose for such applications.
The system designer must take into account the fact that this permeation will take place
and must not use Hose if this permeation could be hazardous. The system designer
must take into account all legal, government, insurance, or any other special regulations
which govern the use of fuels and refrigerants. Never use a Hose even though the fluid
compatibility is acceptable without considering the potential hazardous effects that can
result from permeation through the Hose Assembly.
Permeation of moisture from outside the Hose to inside the Hose will also occur in Hose
assemblies, regardless of internal pressure. If this moisture permeation would have
detrimental effects (particularly, but not limited to refrigeration and air conditioning
systems), incorporation of sufficient drying capacity in the system or other appropriate
system safeguards should be selected and used.
2.7 Size: Transmission of power by means of pressurized fluid varies with pressure and
rate of flow. The size of the components must be adequate to keep pressure losses to a
minimum and avoid damage due to heat generation or excessive fluid velocity.
2.8 Routing: Attention must be given to optimum routing to minimize inherent problems
(kinking or flow restriction due to Hose collapse, twisting of the Hose, proximity to hot
objects or heat sources). For additional routing recommendations see SAE J1273 and
ISO 17165-2. Hose Assemblies have a finite life and if possible, should be installed
in a manner that allows for ease of inspection and future replacement. Rubber Hose
because of its relative short life, should not be used in residential and commercial
buildings for HVAC (heating, ventilating and air conditioning) applications.
2.9 Environment: Care must be taken to insure that the Hose and Fittings are either
compatible with or protected from the environment (that is, surrounding conditions) to
which they are exposed. Environmental conditions including but not limited to ultraviolet
radiation, sunlight, heat, ozone, moisture, water, salt water, chemicals and air pollutants
can cause degradation and premature failure.
2.10 Mechanical Loads: External forces can significantly reduce Hose life or cause failure.
Mechanical loads which must be considered include excessive flexing, twist, kinking,
tensile or side loads, bend radius, and vibration. Use of swivel type Fittings or adapters
may be required to insure no twist is put into the Hose. Unusual applications may
require special testing prior to Hose selection.
2.11 Physical Damage: Care must be taken to protect Hose from wear, snagging, kinking,
bending smaller that minimum bend radius and cutting, any of which can cause
premature Hose failure. Any Hose that has been kinked or bent to a radius smaller than
the minimum bend radius, and any Hose that has been cut or is cracked or is otherwise
damaged should be removed and discarded.
2.12 Proper End Fitting: See instructions 3.2 through 3.5. These recommendations may
be substantiated by testing to industry standards such as SAE J517 for hydraulic
applications, or MIL-A-5070, AS1339, or AS3517 for Hoses from Parker’s Stratoflex
Products Division for aerospace applications.
2.13 Length: When establishing a proper Hose length, motion absorption, Hose length
changes due to pressure, and Hose and machine tolerances and movement must be
considered.
2.14 Specifications and Standards: When selecting Hose and Fittings, government,
industry, and Parker specifications and recommendations must be reviewed and
followed as applicable.
2.15 Hose Cleanliness: Hose components may vary in cleanliness levels. Care must be
taken to insure that the Hose Assembly selected has an adequate level of cleanliness for
the application.
2.16 Fire Resistant Fluids: Some fire resistant fluids that are to be conveyed by Hose
require use of the same type of Hose as used with petroleum base fluids. Some such
fluids require a special Hose, while a few fluids will not work with any Hose at all. See
instructions 2.5 and 1.5. The wrong Hose may fail after a very short service. In addition,
all liquids but pure water may burn fiercely under certain conditions, and even pure
water leakage may be hazardous.
2.17 Radiant Heat: Hose can be heated to destruction without contact by such nearby items
as hot manifolds or molten metal. The same heat source may then initiate a fire. This
can occur despite the presence of cool air around the Hose.
2.18 Welding or Brazing: When using a torch or arc welder in close proximity to hydraulic
lines, the hydraulic lines should be removed or shielded with appropriate fire resistant
materials. Flame or weld spatter could burn through the Hose and possibly ignite
escaping fluid resulting in a catastrophic failure. Heating of plated parts, including Hose
Fittings and adapters, above 450°F (232°C) such as during welding, brazing or soldering
may emit deadly gases.
2.19 Atomic Radiation: Atomic radiation affects all materials used in Hose assemblies.
Since the long-term effects may be unknown, do not expose Hose assemblies to atomic
radiation.
2.20 Aerospace Applications: The only Hose and Fittings that may be used for in-flight
aerospace applications are those available from Parker’s Stratoflex Products Division.
Do not use any other Hose or Fittings for in-flight applications. Do not use any Hose or
Fittings from Parker’s Stratoflex Products Division with any other Hose or Fittings, unless
expressly approved in writing by the engineering manager or chief engineer of Stratoflex
Products Division and verified by the user’s own testing and inspection to aerospace
industry standards.
2.21 Unlocking Couplings: Ball locking Couplings or other Fittings with quick disconnect
ability can unintentionally disconnect if they are dragged over obstructions, or if the
sleeve or other disconnect member is bumped or moved enough to cause disconnect.
Threaded Fittings should be considered where there is a potential for accidental
uncoupling.
3.0 HOSE AND FITTINGS ASSEMBLY AND INSTALLATION INSTRUCTIONS
3.1 Component Inspection: Prior to assembly, a careful examination of the Hose and
Fittings must be performed. All components must be checked for correct style, size,
catalog number, and length. The Hose must be examined for cleanliness, obstructions,
blisters, cover looseness, kinks, cracks, cuts or any other visible defects. Inspect the
Fitting and sealing surfaces for burrs, nicks, corrosion or other imperfections. Do NOT
use any component that displays any signs of nonconformance.
3.2 Hose and Fitting Assembly: Do not assemble a Parker Fitting on a Parker Hose that
is not specifically listed by Parker for that Fitting, unless authorized in writing by the
engineering manager or chief engineer of the appropriate Parker division. Do not
assemble a Parker Fitting on another manufacturer’s Hose or a Parker Hose on another
manufacturer’s Fitting unless (i) the engineering 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 specific Parker product,
and (ii) the user verifies the Assembly 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 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 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 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 Field Attachable/Permanent: Do not reuse any field 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 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.
Safety Guide for Selecting and Using Hose, Fittings and Related Accessories
www.comoso.com
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