Thickness Flashcards
Linings - Thickness of a thin film lining
< 0.020”
Bottom - Min allowed bottom plate thickness when there is a reinforced liner that is > 0.050” thick
0.050”
Bottom - Min allowed bottom plate thickness when there is a means to detect and contain a leak
0.050”
Roofs - Min allowed average thickness of corroded roof plate
0.090” in 100in²
Shell - Min arbitrary shell thickness (used when calculated min thickness is below this number)
0.100”
Bottom - Min allowed thickness of bottom plate at toe of the external shell-to-bottom fillet weld
0.100”
Bottom - Min allowed bottom plate thickness away from crit zone or an annular plate
0.100”
Bottom - Min allowed plate thickness in crit zone that can be repaired by weld-buildup
0.100”
Roof Rim - Min allowed roof rim thickness
0.100”
Roof - Min thickness of new roof plate (cone & floating)
3/16”
Roof Rim - Min Thickness of new roof rim
3/16”
Bottom - Normal min thickness of new bottom plate
1/4”
Bottom Patch - Max thickness of lap-patch in crit zone
1/4”
Weld Qual - When can UT be used in lieu of RT to qualify a Welder/Welding Operator
≥ 1/4”
Brittle - Thickness when brittle fracture is NOT a concern
≤ 1/2”
