355 IAC 3-2-7 Hose and hose connections; construction

Sec. 7. (a) Hose and hose connectors shall be fabricated of materials that are resistant to the action of anhydrous ammonia and additives. (b) Hose shall be clearly marked at least once every five (5) feet with the manufacturer's name or trademark, the words Anhydrous Ammonia, the maximum working pressure in psig, and the year of manufacture. (c) Hose subject to container pressure shall be designed for a minimum working pressure of three hundred fifty (350) psig and a minimum burst pressure of one thousand seven hundred fifty (1,750) psig. (d) Hose and hose connections located on the low pressure side of flow control or pressure reducing valves or devices discharging to atmospheric pressure shall be designed for a minimum working pressure of sixty (60) psig. All connections shall be designed, constructed, and installed so that there will be no leakage when connected. (e) Where liquid transfer hose is not drained of liquid upon completion of transfer operations, such hose shall be equipped with an approved shutoff valve at the discharge end. Provision shall be made to prevent excessive hydrostatic pressure in the hose. (See section 8(j) of this rule.) (f) Hoses shall be permanently removed from service that have been installed and used over a period of time which exceeds the shorter service life of either: (1) the service life recommended by the manufacturer of the hose; or (2) if used in conjunction with an additive, the service life for the ammonia hose as recommended by the manufacturer of the additive. (g) Any hose assembly showing any visible deterioration shall be immediately removed from service. (h) Each hose end valve on each hose in ammonia service shall be equipped with a bleeder valve on the coupling side of the hose end valve. (i) All liquid transfer hoses that are disconnected from nurse tank and tool bar units shall be drained of all ammonia.