MACHINABILITY-- The capability of being cut,
HAND TIGHT--The effort used to hand tighten
turned, sheared, and so forth, by machine tools.
should be only that amount that the average person
can continuously exert, not the forcing that could
MALE AND FEMALE FLANGES--The female
be done by a person picked for his/her strength.
flange of a pair has a flat, recessed face extending
Standard gauges should be put on hand tight.
from inside the pipe nearly to the bolt holes. The
HARDNESS--The ability of a material to resist
male flange is faced with a corresponding raised
portion, and a slightly smaller diameter. The object
of facing the flanges in this way is to prevent a
HULL--(l) The framework of a vessel, together with
blowout of the gasket.
all decks, deck houses, and the inside and outside
plating or planking, but exclusive of masts, yards,
MALLEABLE CAST IRON--Cast iron that is heat
rigging, and all outfit or equipment. (2) The shell,
treated or annealed so that its strength is greater than
or plating, of a ship from keel to gunwale.
cast iron. It can be bent or hammered to a limited
extent, without breaking.
INCLUDED BEVEL ANGLE--A term used in the
preparation of a weld joint where the total degree
MANIFOLD--A fitting with numerous branches for
of bevel is determined by the addition of the bevel
conveying fluids between a large pipe and several
angles applied to both pieces of metal to be welded.
INLET--The side of a fixture in which a substance
MEDIUM PRESSURE--This term applied to valves
and fittings means that they are capable of
ISOTOPE--Atoms of an element having the same
withstanding a working pressure of from 125 to 175
atomic number of different mass numbers.
pounds per square inch.
JOB ORDER--An order issued by a repair activity to
its own subdivision to perform a repair job in
structure and properties of metals and alloys and the
response to a work request.
process by which they are obtained from ore and
adapted to human use.
JOINT, BUTT--A connection between two pieces of
material that is made by bringing their ends or edges
MIL-STD-- Military standards--a formalized set of
together (no overlap) and joined by welding alone,
standards for supplies, equipment, and design work
or by welding, riveting, or bolting each to a strip or
purchased by the United States Armed Forces.
strap that overlaps both pieces.
MILL THICKNESS--Thickness of lumber as it is
JOINT, LAPPED--A connection between two pieces
sawed from the log.
of material that is made by bringing their ends
NIPPLE-- A tubular fitting usually threaded on both
together by overlapping each other and fastening,
ends, and not more than 12 inches long. A length
welding, riveting, or bolting the ends together.
greater than 12 inches is called cut pipe. A nipple
KILN-DRIED-- Lumber artificially dried in a kiln
is also a button or pop that is welded to the inside
under controlled conditions.
or outside of a pipe as a reinforcement where a hole
LAYING OUT--Placing the necessary instructions on
is to be tapped.
plates and shapes for shearing, planing, punching,
NONFERROUS-- Refers to metals not having iron as
bending, flanging, beveling, or rolling from
the base metal.
templates made from drawings.
NORMALIZING-- The act of heating iron-base
LAYOUT--A full-size drawing of a pattern with the
alloys to approximately 100$F above the
appropriate shrink rule and showing pattern
critical temperature range followed by cooling
construction and core arrangement.
to below that range in still air at ordinary
LIFT TEMPLATE--A template the same size and
shape as the part of the ship involved that may be
used to lay out material for fabrication.
that are directly related to the work of each rating.
LIFTING--The act of transferring marks and
OFFSET PIPE--A pipe that is bent to move the line
measurements from an item or model to a plate or
other object by templates or other means.
to a position parallel to and in alignment with the