Page 104 - 2010-2022 hose manufactureing ability and guide

necking down: a localized decrease in the oxidation: the reaction of oxygen on a rubber
cross-sectional area of a hose resulting from product, usually evidenced by a change in the
tension. appearance or feel of the surface or by a change
in physical properties. oxygen bomb: a chamber
nerve: a measure of toughness or recovery
from deformation in unvulcanized rubbers or capable of holding oxygen at an elevated
pressure which can be heated to an elevated
compounds.
temperature. Used for an accelerated aging test.
NFPA: National Fluid Power Association, also
National Fire Protection Association oxygen bomb aging: a means of accelerating a
change in the physical properties of rubber
NHTSA: National Highway Traffic Safety compounds by exposing them to the action of
Administration oxygen at an elevated temperature and pressure.
nip: the clearance between rolls of a mixing
mill or calendar.

nipple: the internal member or portion of a
hose fitting. ozone cracking: the surface cracks, checks, or
crazing caused by exposure to an atmosphere
nominal: a dimensional value assigned for the containing ozone. ozone resistance: the ability
purpose of convenient designation; existing in to withstand the deteriorating effects of ozone
name only. (generally cracking).

nozzle end: an end of hose in which both the P
inside and outside diameters are reduced.
peptizer: a compounding ingredient used in
O small proportions to accelerate by chemical
action the softening of rubber under the
OD: the abbreviation for outside diameter.
influence of mechanical action, heat, or both.
off-center: see eccentricity.
performance teat: see service test.
off gauge: not conforming to a specified
thickness. permanent fitting: the type of fitting which,
once installed, may not be removed for use in
oil proof: not affected by exposure to oil. another hose.

oil swell: the change in volume of a rubber permanent set: the amount by which an elastic
article resulting from contact with oil. material fails to return to its original form after
deformation.
open seam: a seam whose edges do not meet,
creating a void. PHA: Public Health Administration
open steam cure: a method of vulcanizing in photographing: a bas-relief or outline of a
which steam comes in direct contact with the reinforcement which appears on the cover of a
product being cured. hose after vulcanization. Also called
operating pressure: see working pressure, "profiling."
optimum cure: the state of vulcanization at pick: an individual filling yarn of a fabric or
which a desired combination is attained. woven jacket.
OS & D hose: the abbreviation for oil suction pitch: the distance from one point on a helix to
and discharge hose the corresponding point on the next turn of the
helix, measured parallel to the axis. See also:
OSHA: Occupational Safety and Health spacing.
Administration
pitted tube: surface depressions on the inner
overcure: a state of vulcanization beyond the tube of a hose.
optimum cure.
plain ends: the uncapped, or otherwise
unprotected, straight ends of a hose.

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