Technical data

12
Installation continued...
Bunded tanks
A typical bunded fuel oil storage tank installation
Compacted hardcore
300mm min 300mm min
300mm min
300mm min
Non-fire rated wall of building
Non-fire rated boundary
760mm min
1.8m min
Fire Prevention Clearances
Tank to be installed in
accordance with the
requirements of BS5410 and
simplified in OFTEC document
TI14.
Expansion Clearance
Tank must be installed with
clearance of 150mm all round
to allow for expansion when full
of fuel.
Tank Support Base
Maintenance Clearances
Bunded tanks need a clearance
of 600mm all round to allow
possible inspection of inner tank
by removal of outer bund top
cover.
Tank Support Base
Base must fully support the tank
with no overhangs or gaps.
Tanks providing fuel oil to
domestic users (single family
dwellings with a capacity
of less than 3500ltrs) must
comply with the requirements
of OFTEC Technical Book 3:
Section 2.7. An OFTEC
registered engineer
can provide full details.
Base
100mm thick 1:2:4 concrete
mix or 65x215mm precast
concrete lintels to BS 5977 or
50mm thick paving slabs
Note: Large tanks require
thicker bases. Consult OFTEC
or an OFTEC registered
engineer for advice.
Q Store in an upright position, support the entire base of the
tank on a firm, flat, level surface ensuring that the area is
free from any sharp stones or other debris
Q The tank must be adequately separated from any
surrounding structures (HSE guidelines suggest 4m). The
separation between other tanks should be the minimum
needed for safe construction and operation. We recommend
a minimum of 300mm (12”) all round. Also allow space
above the tank for the hinged access cover to fully open
Q Position the tank ensuring best access for filling,
maintenance and safety
Q Ensure the tank is protected from strong wind (especially
when empty). If necessary strap it down. Be careful not to
induce too much force when tying down as to distort product
shape
Q Connect all pipework, fittings, accessories and support
structures
Q The tank and the integrity of seals could be affected if
pipework and fittings are not suitably supported
Q Use PTFE tape or Stag compound for jointing
Q Do not allow factory fitted outlets to become loose or turn
during fitting of accessories or fuel supply pipes. The 1” BSP
bottom outlet fitting (where applicable) is set at an
optimum torque (45 lb/ft, 61Nm) for O-ring seals on the
outer tank wall
Q If gravity feed is not suitable for your application see your
authorised distributor for information on pumps
Q Clearly label the tank to identify the contents and any
relevant safety information