Miscellaneous Numbers Flashcards
Roofs - Max amount of primary seal that can be removed for repair while tank is still in service
1/4”
NDE - Min number of RT’s required on a circular shell replacement plate
1
FFS - Current joint efficiency “E” in API 650
1.0
FFS - Joint efficiency “E” - Calculating tmin for an LTA, when LTA is away from rivets by ≥ 6”
1.0
FFS - Joint Efficiency “E” - Calculating tmin for an LTA, when LTA is away from weld by greater of: 1” or 2t
1.0
Reconstruction - Number of sets of center punch marks located on top and bottom edges of each shell pieces
2
Weld Qual - Number of tension tests to qual a WPS
2
Weld Qual - # of bend tests to qual a welder or welding operator in welding position 1G-4G
2
NDE - Min # 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 & IQI when using a gamma ray source
2.0 - 4.0
NDE - Min # of exposures to RT 360° of a weld using a double-wall technique, single-wall view
3
Impact Test - # of test bars required in each set of impact test speciments
3
NDE - When using shim under a hole-type IQI, the # of sides of the IQI that must be seen in the RT image
3
Hot Tap - Min # of UT readings around the circumference of a new hot tapped nozzle.
4
Weld Qual - # of bend tests to qual a WPS
4
