Glossary
CWS
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D100
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B Welding System
2005 Swagelok Company, all rights reserved
September 2005
A-6
Orbital Welding
A welding technique used for tubing, pipes, etc. in which
the arc rotates around the weld joint circumference.
Oxidation
Heat discoloration that occurs in the weld area caused by the
presence of oxygen. It can vary in color and intensity based
on the weld temperature and the amount of oxygen present.
Oxidation can be detrimental to high purity systems and
increase the chances of weld joint corrosion.
Ozone
A gas produced from the disassociation of oxygen in the
presence of the electric arc.
Penetration
The term used to describe the depth of the weld. The
common usage to describe the correct level of penetration
for tube and pipe welds is “full penetration weld.” This
means the weld has penetrated completely from the outside
diameter to the inside diameter of the weld joint. There are
no portions of the weld joint that are visibly unfused.
Plenum
A device that separates the fixture block side plates,
providing space for the weld head and forming a chamber
for the shielding gas.
Power Supply
The device that produces the electrical power for the
welding process. The SWS power supply is a constant
current power supply.
Pulse Rate
The rate at which the output current level is changed
between the high (Impulse) and low (Maintenance) settings.
The rate is expressed as pulses per second.