Pressures & Slopes Flashcards
1
Q
Scope - Max internal pressure for tanks in API 650 & 653
A
2.5 psig
2
Q
Vac Box - Normal vacuum required when vac testing
A
3 - 5 psig
3
Q
Pressure Test - Pressure used when air testing the shell-to-bottom weld (air between bottom fillet welds)
A
15 psig
4
Q
Pressure Test - Pressure used when air testing a repad
A
15 psig
5
Q
Scope - Max internal pressure for tanks in API 620
A
15 psig
6
Q
Typical min upward slope of a tank bottom
A
1:120
7
Q
Min slope of cone roof tank (for water runoff)
A
1:16
8
Q
Max roof slope on tanks ≥ 50’ diameter (if roof is considered to be frangible)
A
2:12
9
Q
Max taper (steepest slope) allowed for a shell insert plate
A
1:4
