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Gas purity needed?
Thread starterbludmndalm
Start date
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Is there a specific purity needed for inert gas method? PPH 2022 said to make sure the purity testing had an oxygen rating of less than 2%, but the test with the mask said the oxygen level dropped to lower than 1%. What is the purity rating needed? Like what is the highest amount of oxygen that can be in the inert gas?
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