Page 100 - 2010-2022 hose manufactureing ability and guide

flow mark: a surface imperfection similar to a ground finish: a surface produced by grinding
flow crack, but the depression is not quite as or buffing.
deep.
gum compound: a rubber compound
flow rate: a volume of fluid per unit of time containing only those ingredients necessary for
passing a given cross-section of a flow passage vulcanization. Small amounts of other
in a given direction. ingredients may be added for processability,
coloring, and improving resistance to aging.
FM: Factory Mutual Reasearch
H
foreign material: any extraneous matter such
as wood, paper, metal, sand, dirt or pigment that hand-built hose: a hose made by hand on a
should not normally be present in the tube or mandrel, reinforced by textile or wire or
cover of a hose. combination of both.

formula: a list of ingredients and their amount, hank: (1) a skein of yarn; (2) a standard length
used in the preparation of a compound. of yarn. The length is specified by the yarn
numbering system in use, e.g., cotton hanks
free length: the lineal measurement of hose have a length of 840 yards.
between fittings or couplings.
hardening: an increase in resistance to
freeze resistant: see cold resistant.
indentation.
friction: (1) a rubber adhesive compound
impregnating a fabric, usually applied by means hardness: resistance to indentation. See also
of a calendar with rolls running at different durometer hardness.
surface speeds (the process is called hawser twist: a cord or rope construction in
“frictioning"); (2) the resistance to motion due which the first and second twists are in the
to the contact of surfaces; (3) erroneously used same direction while the third twist is in the
to denote adhesion, or degree of adhesion. opposite direction, i.e., S-S-Z.

friction coating: a rubber covering applied to heat resistance: the property or ability to resist
the weave of a fabric simultaneously with the deteriorating effects of elevated
impregnation. temperatures.
friction surface: the exposed portion of a hose helical cord: in hose, a reinforcement formed
formed by a layer of rubber impregnated fabric by a cord or cords wound spirally around the
as distinguished from a product having the body of a hose.
fabric completely covered with a layer of
rubber. helix: in hose, a shape formed by spiraling a
wire or other reinforcement around the
frictioned fabric: a fabric impregnated with a cylindrical body of a hose.
rubber compound by friction motion (calendar
rolls running at different surface speeds). herringbone wrap: a narrow herringbone
woven tape spiraled circumferentially over the
frosting: see chalking. outside of the product to apply external pressure
during vulcanization. See also wrapped cure.
fungicide: a material that prevents or retards
the growth of fungi. Higbee: the thread of a hose coupling, the
outermost convolution of which has been
G
removed to such an extent that a full cross
grab test: a tensile test for woven fabric using section of the thread is exposed, this exposed
specimens considerably wider than the jaws end being beveled.
holding the ends of the test specimen.
hold test: a hydrostatic pressure test in which
grain: the unidirectional orientation of rubber the hose is subjected to a specified internal
or filler particles resulting in anisotropy of pressure for a specified period of time.
rubber compounds.
hose: a flexible conduit consisting of a tube,
reinforcement, and usually an outer cover.

RMA/IP-2/2003 79