3.
INSTALLATION
After selection of proper hose, the following factors must
be considered by the installer:
3.1 Pre-Installation Inspection - Prior to installation, a
careful examination of the hose must be performed.
All components must be checked for correct style,
size, and length. In addition, the hose must be
examined for cleanliness, I.D. obstructions, blisters,
loose cover, or any other visible defects.
3.2 Follow Manufacturers' Assembly Instructions.
3.3 Minimum Bend Radius - Installation at less than
minimum bend radius may significantly reduce hose
life. Particular attention must be given to preclude
sharp bending at the hose/fitting juncture.
3.4 Twist Angle and Orientation - Hose installations must
be such that relative motion of machine
components produces bending of the hose rather
than twisting.
3.5 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.
3.6 Proper Connection of Ports - Proper physical
installation of the hose requires a correctly installed
port connection while insuring that no twist or torque
is put into the hose.
3.7 Avoid 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 eliminate.
3.8 System Check-Out - After completing the installation,
all air entrapment must be eliminated and the
system pressurized to the maximum system
pressure and checked for proper function and
freedom from leaks.
Note: Avoid potential hazardous areas while testing.
4.
MAINTENANCE
Even with proper selection and installation, hose life may
be significantly reduced without a continuing maintenance
program. Frequency should be determined by the
severity of the application and risk potential. A
maintenance program should include the following as a
minimum.
4.1 Hose Storage - Hose products in storage can be
affected adversely by temperature, humidity, ozone,
sunlight, oils, solvents, corrosive liquids and fumes,
insects, rodents, and radioactive materials. Storage
areas should be relatively cool and dark and free
of dust, dirt, dampness, and mildew.
4.2 Visual Inspection - Any of the following conditions
requires replacement of the hose:
(a) Leaks at fitting or in hose. (Leaking fluid is a
fire
hazard.)
(b) Damaged, cut, or abraded cover. (Any
reinforcement exposed.)
(c) Kinked, crushed, flattened, or twisted hose.
(d) Hard, stiff, heat cracked, or charred hose.
(e) Blistered, soft, degraded, or loose cover.
(f) Cracked, damaged, or badly corroded fittings.
(g) Fitting slippage on hose.
4.3 Visual Inspection - The following items must be
tightened, repaired, or replaced as required:
(a) Leaking port conditions.
(b) Clamps, guards, shields.
(c) Remove excessive dirt build-up.
(d) 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 freedom from leaks.
Note: Avoid potential hazardous areas while testing.
4.5 Replacement Intervals - Specific replacement
intervals must be considered based on previous
service
life,
recommendations, or when failures could result in
unacceptable down time, damage, or injury risk.
government
or
industry
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