Heating Fuel Oil
1.1 This standard applies to three types of distillate fuel oils suitable for
use in liquid-fuel-burning equipment without preheating, and three types of
fuel oils which may contain residual fuel components and may require
1.2 The fuel oils covered by this standard are intended for use in oil-burning
equipment for the generation of heat for domestic and industrial purposes.
1.2.1 Types 0, 1 and 2 fuel oils are primarily for use in domestic-type oil
burners. They may also be used for some industrial purposes.
a. Type 0 fuel oil is intended for use in fuel-oil-burning
appliances in the far northern regions where ambient
temperature as low as -48°C are encountered.
b. Type 1 fuel oil is intended primarily for use in sleeve-type
and wick-feed burners, and in most vaporizing pot-type burner
applications. It is also intended for atomizing burners in
which Type 2 fuel oil cannot be used satisfactorily.
c. Type 2 fuel oil is a heavier distillate than Type 1 and is
intended for use in most atomizing-type burner applications.
This type of fuel oil is used in most domestic burners
(furnaces/boilers) and in some medium capacity
commercial-industrial burners where ease of handling and ready
availability may justify its use.
1.2.2 Types 4, 5 and 6 fuel oils are essentially industrial fuels suitable for
use in boilers, mettalurgical operations, etc.
a. Type 4 is an industrial type of fuel oil intended primarily for
burner installations not equipped with preheating facilities.
b. Type 5 is a residual type of fuel oil for burner installations
equipped with preheating facilities requiring a fuel oil of
lower viscosity than Type 6.
c. Type 6 is a high-viscosity residual fuel oil for use in burners
equipped with preheating facilities adequate for handling fuel
oil of high viscosity.
1.3 The testing and evaluation of a product against this standard may
require the use of materials and/or equipment that could be hazardous. This
document does not purport to address all the safety aspects associated with its
use. Anyone using this standard has the responsibility to consult the
appropriate authorities and to establish appropriate health and safety
practices in conjunction with any applicable regulatory requirements prior to