WAC 296-45-48535
Chemical cleaning of boilers and
pressure vessels. The following requirements apply to
chemical cleaning of boilers and pressure vessels:
(1) Areas where chemical cleaning is in progress shall be
cordoned off to restrict access during cleaning. If flammable
liquids, gases, or vapors or combustible materials will be
used or might be produced during the cleaning process, the
following requirements also apply:
(a) The area shall be posted with signs restricting entry
and warning of the hazards of fire and explosion; and
(b) Smoking, welding, and other possible ignition sources
are prohibited in these restricted areas.
(2) The number of personnel in the restricted area shall
be limited to those necessary to accomplish the task safely.
(3) There shall be ready access to water or showers for
emergency use.
Note:
See WAC 296-800-230, of the safety and health core rules, for requirements that apply to the water supply and to
washing facilities.
(4) Employees in restricted areas shall wear protective
equipment meeting the requirements of this chapter and
including, but not limited to, protective clothing, boots,
goggles, and gloves.