ASME BPVC 2023 Section IX

Condition: New product

welding, friction FRW: a solid state welding process that
produces a weld under compressive force contact of workpieces
rotating or moving relative to one another to
produce heat and plastically displace material from the
faying surfaces.
welding, friction stir FSW: a variation of friction welding
producing a weld by the friction heating and plastic material
displacement caused by a rapidly rotating tool traversing
the weld joint.
welding, friction, inertia and continuous drive: processes
and types of friction welding solid state welding
process wherein coalescence is produced after heating
is obtained from mechanically induced sliding motion
between rubbing surfaces held together under pressure.
Inertia welding utilizes all of the kinetic energy stored in a
revolving flywheel spindle system. Continuous drive friction
welding utilizes the energy provided by a continuous
drive source such as an electric or hydraulic motor.
welding, gas metal-arc GMAW: an arc welding process
that uses an arc between a continuous filler metal electrode
and the weld pool. The process is used with shielding
from an externally supplied gas and without the application
of pressure.
welding, gas metal-arc, pulsed spray GMAW-P: a variation
of the gas metal-arc welding process in which the power is
pulsed resulting in transfer of the metal across the arc in
spray mode. See also pulsed power welding.
welding, gas metal-arc, short-circuiting arc GMAW-S: a
variation of the gas metal-arc welding process in
which the consumable electrode is deposited during
repeated short circuits. See also short-circuiting transfer.
welding, gas tungsten-arc GTAW: an arc welding process
which produces coalescence of metals by heating them
with an arc between a tungsten nonconsumable electrode
and the work. Shielding is obtained from a gas
or gas mixture. Pressure may or may not be used and
filler metal may or may not be used. This process has
sometimes been called TIG welding, a nonpreferred term.
welding, gas tungsten-arc, pulsed arc GTAW-P: a variation
of the gas tungsten-arc welding process in which the
current is pulsed. See also pulsed power welding.
welding, hybrid: welding in which two or more welding
processes are used in the same weld pool.
welding, hybrid, process separation: the distance between
each welding process as specified in the WPS.
welding, hybrid, process sequence: the order of each
welding process with respect to the direction of travel.
welding, induction IW: a welding process that produces
coalescence of metals by the heat obtained from resistance
of the workpieces to the flow of induced high frequency

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welding current with or without the application of pressure.
The effect of the high-frequency welding current is to
concentrate the welding heat at the desired location.
welding, laser beam LBW: a welding process which
produces coalescence of materials with the heat obtained
from the application of a concentrated coherent light beam
impinging upon the members to be joined. Welding can be
performed by using the melt-in technique [see also
welding, low-power density laser beam LLBW] or by
keyhole welding.
welding, low-power density laser beam LLBW: a variation
of the laser beam welding process in which the coherent
light beam employs reduced power density, such that
coalescence of materials is achieved by conduction i.e.,
melt-in without keyhole welding.
welding, machine: welding with equipment that has
controls that can be adjusted by the welding operator,
or adjusted under the welding operators direction, in
response to changes in the welding conditions. The
torch, gun, or electrode holder is held by a mechanical
device. See also welding, automatic.
welding, manual: welding wherein the entire welding
operation is performed and controlled by hand.
welding, oxyfuel gas OFW: a group of welding processes
which produces coalescence by heating materials with an
oxyfuel gas flame or flames, with or without the application
of pressure, and with or without the use of filler metal.
welding, plasma-arc PAW: an arc welding process which
produces coalescence of metals by heating them with a
constricted arc between an electrode and the workpiece
transferred arc, or the electrode and the constricting
nozzle nontransferred arc. Shielding is obtained from
the hot, ionized gas issuing from the torch orifice
which may be supplemented by an auxiliary source of
shielding gas. Shielding gas may be an inert gas or a
mixture of gases. Pressure may or may not be used,
and filler metal may or may not be supplied.
welding, projection PW: a resistance welding process
that produces coalescence by the heat obtained from
the resistance of the flow of welding current. The resulting
welds are localized at predetermined points by projections,
embossments, or intersections. The metals to be
joined lap over each other.
welding, resistance RW: a group of welding processes
that produces coalescence of the faying surfaces with
the heat obtained from resistance of the workpieces to
the flow of the welding current in a circuit of which
the workpieces are a part, and by the application of pressure.
welding, resistance seam RSEW: a resistance welding
process that produces a weld at the faying surfaces of overlapped