(3) Drain the solution and again rinse the container with clean water.
(4) Open all inlets and outlets of the container.
(5) Using a flexible tube, hose, or other method of directing the exhaust
from a motor vehicle or stationary engine, direct a stream of exhaust fumes into
the container making sure that there are sufficient openings to allow the fumes to
flow through the container.
(6) Allow the fumes to circulate through the container for 30 minutes or
until the container is so hot it cannot be handled.
(7) Disconnect the tube from the container and using compressed air (min 50
PSI) blow out all fumes.
e. Steam method of cleaning.
(1) Fill the container at least 25 percent full with hot soda detergents or
soda ash solution (1 lb per gallon of water) and agitate it sufficiently to insure
that the inside surfaces are thoroughly flushed.
Do not use soda ash solution on aluminum.
(2) Drain the container thoroughly.
(3) Close all openings in the container with the exception of the drain and
filling connection or vent. Use damp asbestos, damp wood flour, or similar
material for sealing cracks or other damaged sections.
(4) Use steam under low pressure and a hose of at least 3/4-inch diameter.
In this method use low-pressure steam. Control the steam pressure by a valve ahead
of the hose. If a metal nozzle is used at the outlet end it should be made of
nonsparking material and should be electrically connected to the container; the
container, in turn, should be grounded to prevent an accumulation of static
(5) The procedure for the steam method of cleaning is as follows:
(a) Blow steam into the container, preferably through the drain, for a
period of time to be governed by the condition or nature of the flammable substance
previously held by the container. When a container has only one opening, position
it so the condensate will drain from the same opening into which the steam is
inserted. (When steam or hot water is used to clean a container wear suitable
clothing, such as boots, hood, etc, to protect against burns.)
(b) Continue steaming until the
container is free from odors and the
metal parts are hot enough to permit steam
vapors to flow freely out of the
container vent or similar opening. Do not
set a definite time limit for steaming
containers as rain, extreme cold, or other
weather conditions may condense the
steam as fast as it is introduced. It may
take several hours to heat the container
to such a temperature that steam will flow
freely from the outlet of the container.
(c) Thoroughly flush the inside of the container with hot, preferably
(d) Drain the container.