TANK OPERATING INSTRUCTIONS
These Westeel Tanks are designed for:
Holding flammable and combustible liquid products of relative density not greater than 1.0.
These products must be compatible with steel.
NOTE: Flammable and Combustible are as defined in the National Fire Code of Canada. The
use of these tanks for products other than refined petroleum is at the discretion of the tank
the purchaser or their own expert consultants.
OPERATING CONDITIONS
Maximum tank operating pressure:
7 kPa
Maximum operating vacuum:
0.3 kPa
NOTE: Max. Head pressure (overfill condition at bottom of the tank) per CSA B139 10.5.1.3 or NFCC
4.3.12.3: 70 kPa (Max. Vent height above the bottom of the tank must be less than 7m [23’])
This applies to horizontal cylindrical or rectangular tank designs that are installed in a manner that would
allow an accidental overfill of the normal vent pipe. This is not to be considered as a condition.
NOTE: ULC tanks must be operated with a minimum 5% vapor space at the top of the tank and are not
intended to operate under flooded conditions.
VENTING
Max. tank emergency venting pressure for:
Horizontal Cylindrical & Rectangular: 35 kPa,
Vertical Cylindrical: 9 kPa
NOTE: For emergency
venting capacity and maximum test pressures, see Table 2 below.
HORIZONTAL CYLINDRICAL TANKS
MODEL NUMBER
CAPACITY
(Liters)
REQUIRED VENTING
CAPACITY
m^3/min
MAX. TEST PRESSURE
(kPa)
HFV50
260
34
35
HFV100
495
34
35
HFV300
1295
34
35
HFV500
2250
48
35
HFV1000
4460
76
35
HFV8500
8500
109
35
HFV11000
11 000
128
35
HFV15000
14 860
128
30
HFV25000
24 375
155
30
Table 2A
VERTICAL CYLINDRICAL TANKS
MODEL NUMBER
CAPACITY
(Liters)
REQUIRED
VENTING
CAPACITY
m^3/min
MAX. TEST
PRESSURE
(kPa)
VFV2500
2400
57
35
VFV5000
5000
90
30
Table 2B
