Copyright
© 2008 A
M A Husain & Co.
FACTORS
EFFECTING SERVICE LIFE OF HOSE
Hose
and assemblies have a limited life which depends on various service Conditions
Using the hose and assemblies beyond the recommended parameters will significantly
reduce the service life. Continuous use of maximum ratings of working pressure,
operating temperature and minimum bend radius will also reduce service life.
Improper selection of hose, installation or inadequate maintenance may result
in failures, injury to personnel and damage to equipment. Hose assemblies must
be periodically checked for leaks, cover blisters, abrasion etc. And should
be promptly replaced if any such symptoms are observed
RECOMMENDATIONS
TO GET MAXIMUM SERVICE LIFE FROM ANY HOSE
WORKING
PRESSURE: The
pressure of the hydraulic system including occasional surge or peak pressured
must not exceed the rated working pressure of the hose.
MINIMUM BURST PRESSURE: Are
reference pressures during in house destructive tests and for design safety
factors only.
TEMPERATURE RANGE:
Must be within the hose recommended range and must not
exceed the minimum and maximum temperature ratings, as this can lead the premature
failure.
FLUID COMPATIBILITY: Fluid
in use must be compatible to the polymer used in the manufacture of the hose,
if in doubt ask, do not experiment.
MINIMUM BEND RADIUS: Do
not bend beyond the specified parameter as it would put excessive stress on
the braided reinforcement and greatly reduces the pressure resisting capability
of the hose.
HOSE DIAMETER: Select
the correct diameter of the hose to handle the required flow volume. Using a
smaller than required diameter of hose would cause excessive fluid turbulence,
drop in system pressure, excess heat buildup and damage.
HOSE DRESSING: Select
the correct diameter of the hose taking into account vibrations, flexings, movements
etc. Use bends, elbows, tees, adaptors, protective sleeves wherever required
to prevent excessive abrasion, bending, pulling, kinking, contact with heat
sources or corrosive substance.
HOSE
APPLICATIONS: Please
select the right hose for the right job. Eg. A hydraulic hose would not be
suitable in a steam applications and vice versa. Never Compromise and if in
doubt please ask us, the correct answer is only a phone call / fax message
away.
