Line Sizes Flashcards
1
Q
Repad - Nozzle size that never requires a repad
A
< 2 NPS
650: 5.7.2.1
2
Q
RT - Maximum pipe size when using a RT elliptical shot (doublewall technique, double-wall view)
A
3 NPS
(3-1/2” O.D.)
V: T-271.2.b
3
Q
Hot Tap - Maximum nozzle size that can be hot tapped when shell has unknown toughness
A
4 NPS 653: 9.15.1.1.b.1
4
Q
Repairs – On existing tank, new nozzle must use insert plate if shell is over ½” thick and shell material does not meet current MDMT requirements
A
> 4 NPS
653: 9.9.6
5
Q
Definition - When adding a new nozzle, nozzle size to be considered a major alteration
A
> 12 NPS
653: 3.26.a
