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3 Cards in this Set
- Front
- Back
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Which of the following piping systems is covered by B31.3 |
C 1NPS-45 psig gasoline at a tank terminal |
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A process pipe should be classified as class 1 when the percentage of H2S exceeds |
D 3% |
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A welder becomes unqualified when he has not welded using the |
C process for 6 months |
