INSTALLATION INSTRUCTIONS
FOR INDOOR STORAGE
&
AUXILIARY TANKS
BUILT TO CAN/ULC-S602 STANDARD
Installation shall be in compliance with CSA B139, National/Provincial Fire Codes
The Authority having Jurisdiction and all manufacturersʼ current Installation Instructions
1.0
TANK SITE EVALUATION AND PREPARATION PRIOR TO INSTALLATION
1.0.1 The foundations for the tank must be designed to support the tank plus 100%
of the weight of the maximum amount of product the tank will be storing. The
load bearing calculations to include point loading of the foundation by the tank
support structure which may be skids, saddles, etc. The foundation should
include any provisions necessary for seismic design.
1.0.2 Tanks located in areas subject to flooding must be protected against
flotation.
2.0
TANK HANDLING
2.0.1 Do not handle or install tank without having knowledge and experience in
procedures involved with proper and safe installation of an indoor tank
used for storage of stable combustible liquids. Reliance on skilled,
professional installers is an important factor in avoidance of tank damage
and system failures.
2.0.2 Equipment for handling the tank shall be of adequate size to lift and
position the tank. DO NOT DROP OR DRAG THE TANK.
2.0.3 Tanks shall be carefully handled using cables, slings or chains of adequate
length and size. Attach to tank using the lifting lugs if provided or the use
of proper sized slings.
1 2.0.4 DO NOT HANDLE OR MOVE THE TANK UNLESS IT IS EMPTY.
2.0.5 This is a stationary tank intended for Combustible Liquids. Do not use this tank
for the storage of Flammable Liquids or transport while containing a product.
2.0.6 Some tanks require the addition of legs to form the support structure, use a
minimum Sch. 40 pipe for each leg, ensure that the leg length does not result
in the bottom of the tank being elevated to a height greater than 30 mm from
grade.
3.0
TESTING
3.0.1 An on-site air test of the tank as required by the authorities having
jurisdiction to ensure no damage has occurred in shipping and handling. All
testing should be done as described below.
3.0.2 DO NOT APPLY A VACUUM TO THE PRIMARY TANK OF A
DOUBLE WALL TANK OR TO A SINGLE WALL TANK
3.0.3 Vacuum monitored double wall tanks are shipped from the
manufacturer with a vacuum drawn on the space between the walls. Read
and record the vacuum pressure. If the vacuum gauge reading is less than
30kPa contact the tank manufacturer.
3.1
AIR PRESSURE TEST PROCEDURES FOR TANKS
3.1.1 Cap or plug all openings to hold tank pressure as required
NOTE: Use only calibrated air pressure gauges with a 0 to 100 kPa
dial span and equip tank with a pressure relief safety valve set to
open at a maximum pressure of 37kPa. The regulated air supply
test pressure used for this test shall be in accordance with the
production test requirements of the appropriate Underwritersʼ
Laboratories of Canada (ULC) standard CAN/ULC-S602. The
general test pressure limitations are as follows:
a.
Horizontal cylindrical tanks- not less than 20 kPa nor more
than 24kPa. Set pressure relief valve in test air supply line
at 35 kPa.
b.
Rectangular tanks – not more than 20 kPa. Set pressure
relief valve in test air supply line at 20 kPa.
CAUTION: Do not leave pressurized tank unattended when
pressure airline is connected. Do not stand in front of tank heads
or fittings when pressurizing tank. Pressurizing may cause slight
2 deformation of the sides of rectangular tanks, and bulging of the
heads and ends of cylindrical tanks.
SHOULD VISIBLE BULGING OCCUR OF DEFORMATION
APPEARS SEVERE, IMMEDIATELY RELIEVE THE
PRESSURE.
3.1.2 Single Wall Tank Pressurizing Procedure
tank
3.1.2.1
Install test piping as shown in Figure 1. Close valves A and B;
temporarily seal off remaining tank openings to hold pressure.
3.1.2.2
Connect regulated test air supply line to test piping as shown in
Figure 1.
3.1.2.3
Slowly open valve A to pressurize the tank; Pressure gauge 1
should indicate test air pressure given in paragraph 3.1.1 above.
3.1.2.4
Close valve A. Disconnect regulated test air supply line from
piping.
3.1.2.5
Apply a leak test solution to the external tank surface; if a leak is
found contact the tank manufacturer.
3.1.2.6
Hold test pressure in tank for 1 hour minimum. A steady drop in
pressure reading at gauge 1 indicates there may be a leak in the
tank. Check the fittings, gauges, and then retest. Contact the
manufacturer.
3 3.1.2.7
Proceed to paragraph 3.1.4 below.
3.1.3 Double Wall Tank Pressurizing And Test Procedures For Tanks That Are Not
Vacuum Monitored.
3.1.3.1
The following air pressure testing does not apply to double wall
tanks equipped with interstitial vacuum monitoring systems. In
lieu of the air pressure test, the tank may be shipped from the
factory with a vacuum in the tank interstice. Read and record the
vacuum pressure. If the vacuum pressure, gauge reading is less
than 30 kPa contact the tank manufacturer.
3.1.3.2
Install test piping as shown in Figure 2. Close valves A and B
Open C. Temporarily seal off remaining tank openings to hold
pressure.
3.1.3.3
Connect regulated test air supply line to test piping as shown in
Figure 2.
3.1.3.4
Slowly open valve A to pressurize the primary tank. Pressure
gauge1 should indicate test air pressure given in paragraph
3.2.1 above.
3.1.3.5
Close valve A. Disconnect regulated test air supply line from test
piping.
3.1.3.6
Monitor test pressure in primary tank for 1hour minimum. A
steady drop in pressure reading for gauge 1 indicates there may
be a leak in the primary tank. Check the fittings, gauges, and
then retest. If the problem persists, contact the tank
manufacturer.
4 3.1.3.7
If no leaks are found, close valve C and slowly open valve B to
pressurize the interstitial space between the double walls of the
tank.
WARNING: Do not apply air pressure to the interstitial
spaced between the wall of a double wall tank without
pressure in the primary tank. Do not apply air pressure to
the interstitial space that is higher than the air pressure in
the primary tank as damage to the tank may result.
3.1.3.8
Pressure gauge 1 will indicate a slight drop in test pressure
when valve B is opened, should hold steady at the lower
pressure. If test pressure drops below minimum requirements,
close valve B, reconnect air supply line and slowly open valve A
to increase pressure in primary tank. When the required
pressure is indicated on gauge 1 close valve A. Disconnect test
air supply line, Open valve B to equalize pressure in the primary
tank and the interstitial space. Gauge 1 and gauge 2 should
have the same pressure reading.
3.1.3.9
Apply leak test solution to the external surface if a leak is
detected contact the original tank manufacturer.
3.1.3.10
Close valve B. Hold test pressure in interstitial space for 1 hour
minimum. A steady drop in pressure gauge 2 indicates there
may be a leak in the interstitial space. Check the fittings, gauges,
and then retest. If the problem persists contact the tank
manufacturer.
3.1.4 Tank Depressurization Procedure
4.0
3.1.4.1
For single wall tank, slowly open valve B, to release test air
pressure.
3.1.4.2
For double wall tank, open valve C, then slowly open valve A to
release test air pressure.
3.1.4.3
With tank depressurized, remove test piping, temporary plugs,
caps and seals
TANK PIPING AND ACCESSORIES
4.0.1 Install all permanent piping and fittings using compatible, nonhardening thread sealant material.
5 4.0.2 All unused tank openings must be sealed and tested to liquid and
vapour tight prior to putting the tank into service.
4.0.3 DO NOT WELD ON THE TANK, MODIFY OR PENETRATE
THE TANK STRUCTURE IN ANY WAY WITHOUT THE
EXPRESS WRITTEN PERMISSION OF THE TANK
MANUFACTURER
4.0.4 All tank accessories shall be installed as required by the Authority
Having Jurisdiction. These include but are not limited to: Antisiphon devices fill limiting devices and alarms, vent gauges, etc.
5.0
MAINTENANCE
5.0.1 The tank operator should perform periodic walk-around
inspections to identify and repair areas of coating damage.
5.0.2 It is imperative that the tank be inspected periodically to ensure
that the integrity of the coating is maintained. The frequency of
periodic re-painting will be based upon environmental factors in
the area where the tank is located. Special consideration should be
given to the selection of the paint, surface preparation and coating
application. The coating selected should be suitable for use with
the current coating, or the existing coating should be removed. The
coating selected should be of industrial quality.
5.0.3 The primary tank should be inspected at least monthly for the
presence of water at the lowest possible point inside the primary
tank. Remove any water found. Water and sediment in fuel can
cause plugging of filter. Also, bacterial growth, in this media can
cause filters to plug and cause corrosion of tanks and lines.
GOVERNING STANDARDS/REFERENCES
Equipment and installation necessary to accomplish the work shall comply with the latest
revisions of the applicable Federal, Provincial, and/or Local codes, regulations and
standards concerning aboveground fuel oil storage which may include one or more of the
following:
National Fire Code of Canada
National Building Code of Canada
C. C. M. E. Code of Practice for Aboveground Storage Tanks
CSA-B139
Provincial or Territorial Building and Fire Codes
6 T.S.S.A.- Ontario B-139 Fuel Oil Code
Nation Fire Protection Association: Flammable and Combustible Liquids
Canadian Electrical Code
ANSI B31 American National Standard Code for Pressure Piping
API 2000 Venting atmospheric and Low Pressure Storage Tanks
UNDERWRITERS LABORATORIES OF CANADA
CAN/ULC-S602 Aboveground Steel Tanks for Fuel and Lubricating Oil
DISCLAIMER:
These instructions are general in nature and are not intended to be a detailed method for
tank installation. They do not contain all of the installation safety requirements, it is the
responsibility of the owner of the storage system to ensure that where detailed instructions
are required that the tank installer be aware of these instructions. Steelcraft Inc. will accept
no liability for damages to the storage system or personnel in charge of installation while
attempting to follow these instructions. Storage system integrity and on site personnel safety
is the sole responsibility of the owner of the system.
7