yellow out of service tag attached on faulty damage defect of industry heavy duty lifting chains block at construction site perth

and attached australia background block broken care caution chains compressed construction control cut damage danger dangerous defect duty energy equipment factory faulty health heavy industrial industry information inspection isolated isolation lifting lock lockout machine machinery occupational off oil old open perth petrochemical pipeline plant power pressure process product professional protest pump repairs safety service sign site strategy tag technology tool unsafe valve warning workplace workplaces yellow