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(a) (13-21) The ends of every compressed air hose 1 inch or larger inside diameter shall be chained or otherwise secured to prevent whipping in case of a disconnected hose. When 2 or more hoses are connected to each other, the connecting ends shall be secured together.
(b) Material used to secure the hose ends shall be chain made of three-sixteenths-inch stock or of other material of equivalent strength.
(c) When an auxiliary compressed air tank is located on a jumbo or at any other place away from the rigid compressed air supply line, both ends of every length of connecting hose shall be secured.
(d) Air pipe lines 2 inches or more in diameter shall be adequately secured against unnecessary movement. Such pipe lines shall be protected against accidental impact from vehicles and falling objects at points where breakage of lines would constitute a hazard to employees.
(e) (13-20) At no time shall compressed air be directed toward a person. When compressed air is used, all necessary precautions shall be taken to protect persons from injury.
1. Renumbering of former section to 6999 and new section filed 1-12-73; effective thirtieth day thereafter (Register 73, No. 2).