Английский для сварщиков. Гричин С.В. - 165 стр.

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165
An oxygen cutting process in which the necessary cutting temperature
is maintained by flames obtained by the combustion of natural gas with
oxygen.
OXY-PROPANE CUTTING:
An oxygen cutting process in which the necessary cutting temperature
is maintained by flames obtained from the combustion of propane with
oxygen.
PASS:
The weld metal deposited in one general progression along the axis of
the weld.
PEENING:
The mechanical working of metals by means of hammer blows.
Peening tends to stretch the surface of the cold metal, thereby relieving
contraction stresses.
PENETRANT INSPECTION:
a. Fluorescent
. A water washable penetrant with high fluorescence and
low surface tension. It is drawn into small surface openings by
capillary action. When exposed to black light, the dye will fluoresce.
b. Dye
. A process which involves the use of three noncorrosive liquids.
First, the surface cleaner solution is used. Then the penetrant is applied
and allowed to stand at least 5 minutes. After standing, the penetrant is
removed with the leaner solution and the developer is applied. The dye
penetrant, which has remained in the surface discontinuity, will be
drawn to the surface by the developer resulting in bright red
indications.
PERCUSSIVE WELDING:
A resistance welding process in which a discharge of electrical energy
and the application of high pressure occurs simultaneously, or with the
electrical discharge occurring slightly before the application of
pressure.
PERLITE:
Perlite is the lamellar aggregate of ferrite and iron carbide resulting
from the direct transformation of austenite at the lower critical point.
PITCH:
Center to center spacing of welds.
PLUG WELD:
A weld is made in a hole in one member of a lap joint, joining that
member to that portion of the surface of the other member which is
exposed through the hole. The walls of the hole may or may not be
parallel, and the hole may be partially or completely filled with the
weld metal.

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