Acts and Regulations

91-191 - General

Section 278
Disposition versions

Full text
Containers that hold or have held flammable or explosive substance
278(1)Where a container or pipe, or any pipe, valve or fitting connected to the container or pipe, holds or may have held an explosive or flammable substance, an employer shall ensure that the container or pipe and the pipe, valve or fitting connected to the container or pipe are completely drained, cleaned and ventilated in accordance with subsection (2) before any process involving the application of heat is undertaken.
278(2)To drain, clean and ventilate as required by subsection (1), an employer shall ensure that
(a) inlet pipes are disconnected and blocked off or moved out of alignment or the inlet valves are locked in the closed position;
(b) where residual liquid remains, it is removed by an employee without going inside the container or pipe;
(c) where steam is available, all openings except the vent pipe and steam inlet are closed and the steam is blown into the container or pipe and any pipe, valve or fitting connected to the container or pipe for a period of time suitable for the conditions and the nature of the explosive or flammable substance, with the lids and manhole plates opened during the last one-fifth time of the steaming period;
(d) where steam is not available, the container or pipe and any pipe, valve or fitting connected to the container or pipe is kept filled with running water for a period of at least twenty-four hours;
(e) after cleaning, the container or pipe and any pipe, valve or fitting connected to the container or pipe is thoroughly ventilated with forced or induced draft air for a minimum period of two hours;
(f) after ventilation, a competent person examines the interior of the container or pipe and any pipe, valve or fitting connected to the container or pipe to see that it is free from residue and tests air samples to ascertain that all explosive or flammable vapours have been removed;
(g) a record is made of the procedures and the tests required by paragraph (f) and is dated and signed by the person taking the tests;
(h) the person who takes the tests required by paragraph (f) certifies that work involving the application of heat can be safely undertaken on the container or pipe and any pipe, valve or fitting connected to the container or pipe; and
(i) where the tests required by paragraph (f) indicate the presence of explosive or flammable substances, the steaming or flooding, ventilating and testing operations are repeated.
97-121
Containers that hold or have held flammable or explosive substance
278(1)Where a container or pipe, or any pipe, valve or fitting connected to the container or pipe, holds or may have held an explosive or flammable substance, an employer shall ensure that the container or pipe and the pipe, valve or fitting connected to the container or pipe are completely drained, cleaned and ventilated in accordance with subsection (2) before any process involving the application of heat is undertaken.
278(2)To drain, clean and ventilate as required by subsection (1), an employer shall ensure that
(a) inlet pipes are disconnected and blocked off or moved out of alignment or the inlet valves are locked in the closed position;
(b) where residual liquid remains, it is removed by an employee without going inside the container or pipe;
(c) where steam is available, all openings except the vent pipe and steam inlet are closed and the steam is blown into the container or pipe and any pipe, valve or fitting connected to the container or pipe for a period of time suitable for the conditions and the nature of the explosive or flammable substance, with the lids and manhole plates opened during the last one-fifth time of the steaming period;
(d) where steam is not available, the container or pipe and any pipe, valve or fitting connected to the container or pipe is kept filled with running water for a period of at least twenty-four hours;
(e) after cleaning, the container or pipe and any pipe, valve or fitting connected to the container or pipe is thoroughly ventilated with forced or induced draft air for a minimum period of two hours;
(f) after ventilation, a competent person examines the interior of the container or pipe and any pipe, valve or fitting connected to the container or pipe to see that it is free from residue and tests air samples to ascertain that all explosive or flammable vapours have been removed;
(g) a record is made of the procedures and the tests required by paragraph (f) and is dated and signed by the person taking the tests;
(h) the person who takes the tests required by paragraph (f) certifies that work involving the application of heat can be safely undertaken on the container or pipe and any pipe, valve or fitting connected to the container or pipe; and
(i) where the tests required by paragraph (f) indicate the presence of explosive or flammable substances, the steaming or flooding, ventilating and testing operations are repeated.
97-121