Miscellaneous Numbers Flashcards
Flanges – minimum thread engagement acceptance criteria per 570
-1 thread
Flanges – minimum thread engagement acceptance criteria per B31.3
-0 threads
Ratio of endurance limit stress to ultimate tensile stress for carbon steel 
0.4–0.5
Testing – minimum range of pressure gauge used during a pressure test (multiplied by test pressure)
1.5
Testing – preferred range of pressure gauge used during a pressure test (multiplied by test pressure)
2
NDE – & of additional welds or joints to examine when a weld defect is found during a random examination 
2
PWHT – minimum #of thermocouples required when performing a local PWHT instead of a 360° band 
2
Welder qualification – number of tension tests to qualify a WPS 
2
Weld qualification – number of bend tests to qualify a welder or welding operator in welding positions, 1G-4G.
2
NDE – minimum #of exposures to RT 360° of a weld using a double – wall technique, double wall view (elliptical shot)
2
NDE – RT film density range – allowed for the weld and IQI when using a Gamma ray Source
2.0–4.0
NDE - Minimum #of exposures to RT 360° of a weld using a double wall technique, single wall view
3
Impact test – number of tests bars required In each set
3
NDE– when using a shim under a hole – type IQI, the number of sides of the IQI that must be seen in the RT image
3
Testing – maximum range of pressure gauge used during a pressure test (multiplied by test pressure)
4
