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The oil heating equipment
detailed in this short web-catalogue conforms and in most cases
exceeds (comfortably) the requirements laid down in BS 799 Part 5. We
have reprinted some of this BS so that you will be aware of the
relevant requirements. Note that BS 799 is now superseded and further
information on the subject will be made available shortly.
In general,
heaters covered by the Standard may be of the IMMERSION,
SUBMERSION or OUTFLOW type. Typically these are
always inserted horizontally, but special vertical versions are available.
IMMERSION
Heaters may be inserted at the Outlet end of the tank.
SUBMERSION
Heaters may be inserted through the top of the tank.
OUTFLOW
Heaters are inserted into the tank wall.
Line heaters are
also covered but in a different part of the standard. ALSO SEE INFORMATION
For ELECTRIC
Heaters, the loading shall not exceed 1.6 W/cm2 on the
sheath (1975 BS). Thermostatic control shall be employed.
Elements and
Thermostats shall be of the DRY (removable) type so that they
can be withdrawn without emptying the tank.
The element sheath
or pocket shall be of sufficient strength to prevent damage to the
element and shall be supported as necessary along its length by
cradles or other supports.
(There is mention
of Steam Immersion heaters but as these are very specific to one
customer we do nt intend to discuss them unless asked.)
LOCATION.
All heaters and control thermostats shall be so located in relation
to the draw off level that their surfaces do not become exposed. In
other words - keep them BELOW the draw off.
That about covers
the British Standard so far as it mentions Heaters. You will note
however that no mention is made of Safety Cut out thermostats. We
thought that this was something of an error since the standards
applied to Outflow Heaters and Line Heaters require their fitment. We
therefore took it upon ourselves to design - as a standard - an
immersion heater which fulfills all the requirements plus a few that
have yet to be written.
Referring now
(briefly) to BS 799 Part 4 - mention is made of materials which are
NOT recommended for use with fuel oil, as follows :
1) Copper and some
copper alloys are generally unsuitable for coal tar liquid fuels
2) Aluminium and
aluminium alloys may be unsuitable when in contact with hot fuel.
3) Unprotected
copper and aluminium and their alloys are unsuitable for use with hot oil
4) Metals in
contact with oil shall not be galvanized. Unalloyed lead and zinc are
unsuitable for use withhot oil |