|Oxygen Percentage||Parts Per Million|
|100%||=||1,000,000||(One million ppm)|
|10%||=||100,000||(One hundred thousand ppm)|
|1%||=||10,000||(Ten thousand ppm)|
|0.1%||=||1,000||(One thousand ppm) good level for Weld Purging of duplex and stainless steels|
|0.01%||=||100||(One hundred ppm)|
|0.001%||=||10||(Ten ppm) suitable level for welding titanium and UHP joints in stainless|
This chart is simply provided to help explain the relationship between parts per million and percentage of oxygen.