29
Hose marking possibilities
Typical hose marking: in longitudinal line with ink
transfer tape or printed directly on hose cover
Information about date of production and hose
serial number typically embossed into hose cover
separately
Special marking also possible upon the customer
request.
Conversion constants
Length:
millimeters x 0.03937 = inches
inches
x 25.4
= millimeters
meters
x 39.37 = inches
inches
x 0.0254 = meters
Working
MPa x 10
= bar
pressure:
bar x 0.1
= MPa
MPa/0.006896
= PSI
PSI x 0.006896
= MPa
Tempera-
1 °F = 9/5 °C + 32
ture:
1 °C = 5/9 (°F–32)
Properties of Rubber Qualities used in
industrial hoses
BR
Butadiene Rubber: Excellent low tem-
perature and abrasion properties. High
resilience
CR
Chloroprene Rubber: Excellent weather
and ozone resistance, flame retarding.
Moderate resistance to oil and chemicals
EPM/EPDM
Ethylene Propylene: Excellent ozone,
weathering, heat, chemicals and ageing
resistance. Not oil resistant
IR
Isoprene Rubber: Some properties as
natural rubber
NBR
Nitrile Butadiene Rubber: Excellent
resistance to petroleum based fluids
(moderate resistance to aromatics)
Good physical properties
NBR-PVC
NBR/Polyvinyle Chloride: Excellent oil
and weathering resistance
NR
Natural Rubber: Excellent physical
properties including abrasion and low
temperature resistance. Not resistant to
oil and fuels.
SBR
Styrene Butadiene Rubber: Good physical
properties, including abrasion resistance.
Not resistant to oil and fuels
Solvent Information chart
Aromatic solvents:
benzene, naphthalene, cumene,
p-cumene, toluene, xylene, cresol, styrene, cyclo-
hexane
Aliphatic solvents:
propane, butane, pentane, he-
xane, heptane, dipentene
Halogenous solvents:
chloroform, dichlorobenzene,
dichloroethylene, methylenbromid, methylen chlorid,
benzyl chloride, carbon tetrachloride, trichlorethyle-
ne, carbon disulphide, turpentine, perchlorethylene,
dichlorethane
Ketonic solvents:
acetone, methyl ketone, isobutyl
ketone, methyl ethyl ketone, methyl iso butyl ketone
Ester solvents:
butyl acetate, methyl acetate, amyl
acetate, isobutyl acetate
Alcohols:
methyl, ethyl, butyl, amyl, isopropyl, de-
cyl, isobutyl, diacetone, ethyl hexanol
Amines:
aniline, ethylene diamine, diethanol amine,
triethanolamine, dimethylamine, monoethanolamine
Chemical Recommendations
This table is only a guide and should be used as
such, as the degree of resistance of an elastomer
with a particular fluid depends upon such variables
as temperature, concentration, pressure, velocity
of flow, duration of exposure, aeration, stability of
the fluid, etc. Also variations in elastomer types and
special compounding of stocks to meet specific
service conditions have considerable influence on
the results obtained. It is always advisable to test
the tube compound under actual service conditions.
If this is not practical, tests should be devised that
simulate service conditions or the hose manufactu-
rer contacted for recommendations.
The table on page 30-31 lists the more commonly
used materials, chemicals, solvents, oils, etc. The
recommendations are based on room temperature
and pressure conditions normally recommended for
the particular type of hose being used. Where condi-
tions beyond this can be met ready, they have been
so indicated; where conditions are not normal and
cannot readily met, the hose manufacturer should
always be consulted.
WARNING:
The following data has been compiled from
generally available sources and should not be relied upon
without consulting and following the hose manufacturer’s
specific chemical recommendations. Neglecting to do so
might result in failure of the hose to fulfill its intended pur-
pose, and may result in possible damage to property and
serious bodily injury.
Technical information
Marking, conversion, properties
1...,19,20,21,22,23,24,25,26,27,28 30,31,32