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