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TITLE 8 DIVISION OF INDUSTRIAL c -ETT 58.13 .%, UNFIRED PRESSURE VESSEL SA...e ORDERS • - (Roglater 75. No. 13---L23.75) (f) Unless surrounded by a rugged steel fence or equivalent, all lio- uid and vapor outlets shall be kept effectively locked when unattended. (g) Transportation tanks shall not be used as mobile storage tanks without written permission from the Division, unless they are in full compliance with both Sections 504 and 505. History: 1. Amendment of subsection (b) filed 12-8-72 as procedural and organization- al; effective upon filing (Register 72, No. 50). 506. Installation of Tanks Mounted on Farm Machinery. (a) Tanks or cylinders used to furnish anhydrous ammonia to agricultural applicator tanks and tanks used on applicators, etc., shall be so installed that the bottom of the container and/or any outlet connection, includ- ing hose, shall not be lower than the lowest horizontal edge of the vehicle axle when fully loaded. These tanks shall be secured to prevent jarring loose, slipping, or rotating of the tanks while in service. Such supports and fastenings shall be designed to withstand a loading in any direction equal to the loaded weight of the tank when filled to the maximum permissible level with a factor of safety of at least 8. Field welding where necessary, shall be made only on nonpressure parts that were installed by the manufacturer of the tank. (b) The connections between the applicator tank and pressure-re- ducing valve shall be extra heavy fittings and Schedule-80 pipe, high- pressure anhydrous ammonia hose (1750 psi minimum bursting pres- sure), or equivalent, and where exposed, shall be protected against physical damage. All main shutoff valves shall be readily accessible while the unit is in normal operation. All shutoff valves shall be suitably protected against physical damage. (c) While in use on farm machinery, each skid tank, applicator tank, or combination thereof shall have securely attached a container holding not less than 5 gallons of fresh water. This container shall have a suitable opening to permit the application of water to flush the eyes. The container of fresh water required by this subsection may be attached to the tractor or other source of power used to tow the vef icle or device on which the tank is used. (d) All trailers shall be securely attached to the vehicle drawing them by means of drawbars supplemented by suitable safety chains. (e) A trailer shall be constructed so that it will follow substantially in the path of the towing vehicle and will not whip or swerve danger- ously from side to side. History. 1. Amendment of subsection (a) and new subsections (d) and (e) filed 3-28- 75; effective thirtieth day thereafter (Register 75, No. 13). 507. Piping, Valves, and Fittings for Liquid and Vapor Lines. (a) All pipe between the tank and first shutoff valve shall be at least Sched- ule 80. All fittings between the tank and the first shutoff valve shall be steel as required by Section 507 (c), first paragraph. Aboveground piping in excess of 1'/Z-inch pipe size may be Schedule 40 when used beyond the first shutoff valve provided welded,or welded and flanged connections are used. All other piping shall be Schedule 80.