CYLINDER-- Any tank, drum, retort, receiver, or
CLOSE NIPPLE--One whose length is about twice
the length of a standard pipe thread and is without
reservoir made of pipe and closed at each end,
except for a required test hole.
CLOSE RETURN BEND--A short U-shaped fitting
DECK-- A deck in a ship corresponds to a floor in a
made of cast or malleable iron and used to unite two
building. It is the plating, planking, or covering of
parallel pipes. It differs from the open return bend
any tier of beams above the inner bottom forming
in having the arms joined.
a floor either in the hull or superstructure of a ship.
Decks are designated by their locations. Examples
COLD SHUT--The imperfect junction where two
streams of molten metal meet but do not fuse
are upper deck, main deck, forward lower deck, and
after superstructure deck. The after portion of a
weather deck was formerly known as the
COLLAR--A threaded pipe coupling, or the sleeve in
quarterdeck and on warships is allotted to the use
back of a riveting flange. Certain types of flanges
of the officers.
that can be attached by peening and beading are also
called collar flanges.
DECK PLATING--A term applied to the steel plating
of a deck.
COMBUSTIBLE--A material that can bum, or the
capability of burning.
DEFORMATION-- Permanent alteration of form or
COMMON THREAD--In machinery, an ordinary
standard machine thread as distinguished from a
DEVELOPMENT-- The process of making a flat
pattern from the dimensions of a drawing. Used to
CONTRACTION--The amount that the metal will
fabricate sheet metal objects.
decrease in size from the time it is poured to the time
DIE--A tool for cutting threads with the cutting usually
the temperature has fallen to the normal
accomplished in one pass. It differs from a chasing
temperature of the metal.
or threading tool in that the latter has one or just a
CONTRACTION RULE (ALSO CALLED
few cutting edges, whereas the die has many cutting
SHRINKAGE RULE)--A rule having the
graduations enlarged to compensate for the
DRIFTED-- This term means that a drift or short
lessening in the size of a casting caused by the
mandrel has been passed through a pipe to remove
decreasing size of the cooling metal.
any irregularities on the inside surface of the pipe.
COUNTERSINK-- (l) A tool used to chamfer the lips
of a hole. (2) An operation that requires use of a
DRIFT PIN--A conical-shaped pin gradually tapered
from a blunt point to a diameter a little larger than
the rivet holes in which it is to be used. The point
COUNTERSUNK-- As applied to fittings, this
is inserted in rivet holes that are not fair, and the
indicates that the edges of a tapped opening are
other end is hammered until the holes are forced
chammered to a 45-degree angle.
COUPLING-- A threaded sleeve used to connect two
DRILLED-- Used in connection with flanges, it means
pipes. As a joining device, it may be either straight
that the flange bolt holes have been made by a drill,
and not by cores.
CRADLE--A support of wood or metal shaped to fit
the object that is stowed upon it.
DUCTILITY-- The property permitting the permanent
deformation by stress or tension without rupture.
CUP JOINT--A lead joint in which one pipe has a
flared cup and the other pipe is tapered to fit this
DUMMY SPOOL--A substitute piece of pipe with
cup. The joint is then soldered.
flanges that can be temporarily substituted for
valves if the latter are not available when the piping
CUPPING--The tendency of sawed boards to curl
away from the heart of the tree.
EDGE--An abrupt border or margin, a bounding or
CUTOUT VALVE--A valve that is intended normally
to be fully open or fully closed.
dividing line, the part along the boundary.