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B-1.1, r. 2 - Construction Code
Section 8.100
Disposition versions
8.100. The minimum diameter of the vent referred to in section 8.99 must respect the values in the following Table 4 if the vent piping does not have more than 7 elbows; in other cases, the diameter must exceed the values so that the allowable stress for the tank is not exceeded.
TABLE 4
VENT DIAMETERS (mm)
________________________________________________
Maximum flow Pipe length
Rate (L/min) _____________________________
15 m 30 m 60 m
________________________________________________
380 32 32 32
760 32 32 32
1,140 32 32 38
1,520 32 38 50
1,900 32 38 50
2,280 38 50 50
2,660 50 50 50
3,040 50 50 75
3,420 50 50 75
3,800 50 50 75
________________________________________________
Maximum flow Pipe length
Rate (L/min) _____________________________
15 m 30 m 60 m
________________________________________________
380 32 32 32
760 32 32 32
1,140 32 32 38
1,520 32 38 50
1,900 32 38 50
2,280 38 50 50
2,660 50 50 50
3,040 50 50 75
3,420 50 50 75
3,800 50 50 75
________________________________________________
N.B.: Vent size is based on the highest filling or emptying flow rate.
