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Welding Gas Quality And Gas Grades
Listed below are some of the more commonly used gas grades commercially
available. In manual welding an experience operator can sometimes
allows for many inconsistencies. In order to perform repeatable
precision arc welding with an automated welding system, it is
vital to have all inputs to the welding system consistent. Ensure
that you have a supplier of welding gas that already has a quality
control program established and can provide consistent quality
gas.
U.S. Gas Grade |
% Purity |
Typical Composition |
Industrial Grade |
99.997 |
10 PPM H2O
|
High Purity |
99.996 |
3 PPM H2O
|
Ultra High Purity |
99.999 |
5 PPM 02 |
|
|
3 PPM H2O
|
|
|
5 PPM O2
|
|
|
6 PPM N
|
|
|
1 PPM THK
|
Ultra Plus |
99.9995 |
1 PPM H2O
|
|
|
1 PPM 02
|
|
|
0.5 PPM CO
|
|
|
1 PPM H
|
|
|
2 PPM N
|
|
|
0.5 PPM THC
|
Research Grade |
99.9995 |
3 PPM H2O
|
|
|
1 PPM O2
|
|
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1 PPM CO
|
|
|
1 PPM H
|
|
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2 PPM N
|
|
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1 PPM THC
|
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