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18 Cards in this Set
- Front
- Back
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Weight used to check magnetic strength of an AC yoke |
10 pounds |
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Weight used to check magnetic strength of a DC yoke |
40lbs |
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When performing a visual exam, the minimum angle of eye to part |
30° |
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Hole size that must be visible in RT when using a hole- type IQI |
2T |
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Maximum allowed thickness on a WPS based on the plate thickness (T) of a PQR test coupon |
2T |
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Minimum light intensity when performing VT, MT or PT exams |
100 foot – candles |
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Minimum black light intensity when performing MT or PT exams |
1000 microwatts/cm squared |
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Lead letter used during RT to check for backscatter radiation |
B |
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Lead letter used during RT to indicate a film – side IQI |
F |
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Two primary Gamma – ray radiation sources |
Iridium, cobalt |
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Two most common CS pipe materials |
A53 & A106 |
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Maximum stress allowed during a pressure test |
90% of SMYS |
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PH of hydrotest water needed to reduce likelihood of MIC (bugs) |
Greater than 10 PH |
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Maximum allowed SMYS allowed for pipe if fillet– welded patch is installed |
40,000 PSI |
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Typical external corrosion rate for dry rural environments |
Less than 1MPY |
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Typical EXT corrosion rate for inland locations with moderate rain and humidity |
1-3MPY |
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Possible EXT corrosion rate for industrial environment with acid or sulfur compounds |
5-10 mpy |
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Possible EXT corrosion rate for marine environments |
20 mpy |
