fahrenheit 302/2

Storage
Rubber hose products in storage can be affected adversely by excessive
temperature, humidity, ozone, sunlight, oils, solvents, corrosive liquids
and smokes, insects, rodents and radioactive materials.
The appropriate method for storing hose, depends to a great extent on
its size, the quantity to be stored, and the way in which it is packaged.
Hose should not be piled or stacked to such an extent that the weight can
cause serious damage to the lengths stored in the bottom. Hose having a
very thin wall will not support as much hose as could a hose having a
heavy wire reinforcement. Hose which is shipped in coils should be
stored in order that coils are in a horizontal plane.
Whenever feasible, rubber hose products, should be stored in their original
shipping containers, especially when such containers are wooden spools
or cardboard cartons which provide some protections against effects of
oils, solvents and corrosive liquids; shipping containers are also afford
some protection against ozone and sunlight.
The ideal temperature for the storage of rubber products ranges from 10-
21°C (50-70°F), with a maximum limit of 40°C (105°F).
If stored below 0°C (32°F), some rubber products become stiff and would
require warming before being placed in service.
Rubber products should not be stored near sources of heat, such as
radiators, heaters, etc, nor should they be stored under conditions of high
humidity, or high ozone as near electric motors.
To avoid the adverse effects of high ozone concentration, rubber hose
products should not be stored directly under direct or reflected sunlight -
even through windows -.
Certain rodents and insects will damage rubber hose products and an
adequate protection from them should be provided.
Storage areas should be relatively cool and dark, items should also be
stored on a first-in, first-out basis, since even under the best conditions,
an unusually long shelf life could deteriorate certain rubber products
smallest anticipated bend radius without overstress. The minimum bend
radius is generally specified for each hose in this catalogue. This is the
radius to which the hose can be bent in service without damage or
appreciably shortening its life. The radius is measured to the inside of the
curvature.
Formula to determinate hose length, given hose bend radius and degree
of bend required:
A
360
x 2 π B = L
Where:
A = angle of bend
B = given hose bend radius
L = minimum length of hose requested
2 π B = 3,14
example: to make a 60° bend at a hose’s rated minimum bend radius of
300mm.
60
x 2x 3,14x300 = 314mm
360
The bend radius used must be equal or bigger than the minimum bend
radius. Bending the hose to a smaller bend radius than minimum may
kink the hose and result in damage to early failure.
Proper design must be completed by using the proper fittings.
Improper fittings may cause serious damage or serious personal injuries.
Always refer to Manufacturer’s instructions on how to assemble hose with
fitting.
Recommendation for Proper Hose Installation and fitting
choice
Hydraulic hoses may have a change in length from +2% up to –4%, when
subjected to normal working conditions. Great care and attention has to
be taken when designing hose lay-out as a change in length may occur.
Flexibility and minimum bend radius are important factors in hose design
and selection if it is known that the hose will be subjected to sharp
curvature in normal use.
When bent at an angle too sharp, hose may kink or flatten in the cross
section. The reinforcement may also be unduly stressed or distorted and
the hose life shortened.
Adequate flexibility, means the hose should be able to conform the