R 408.14523 Hydraulic and pneumatic systems.

Rule 4523. (1) Flexible and rigid hydraulic and pneumatic piping and its component parts shall have a designed safety factor of not less than 4 and shall be maintained to prevent leaks that constitute a hazard. (2) A hydraulic pressure relief valve shall be provided on each separate system and set to open at a pressure of not more than 10% above the maximum operating pressure. The discharge of the valve shall not create a hazard for the employee. A die casting machine shall not be operated with the pressure relief valve removed. (3) Fire resistant fluid shall be used in equipment where failure of a hydraulic system could cause ignition of the fluid by molten metal or flame. (4) Hydraulic and pneumatic lines shall be protected from damage due to chafing or pinching.