1. (a) Hose and hose connectors shall be fabricated of materials that are resistant of the action of anhydrous ammonia.

2. (b)

   1. (1) Hoses subject to container pressure shall be designed for a minimum bursting pressure of one thousand seven hundred fifty pounds per square inch gauge (1,750 psig).
   2. (2) Hose assemblies, when made up, shall be capable of withstanding a test pressure of not less than five hundred pounds per square inch gauge (500 psig).

3. (c)

   1. (1) Hose and hose connections located on the low-pressure side of flow control or pressure reducing valves or devices shall be designed for a minimum bursting pressure of one hundred twenty-five pounds per square inch gauge (125 psig).
   2. (2) All connections shall be designed, constructed, and installed so that there will be no leakage when connected.

4. (d)

   1. (1) Where hose is to be used for transferring liquid, wet hose is recommended.
   2. (2) Such hose shall be equipped with an approved shutoff valve at the discharge end.
   3. (3) A safety relief valve shall be installed between the hand shutoff valves as near the containers as possible.
   4. (4) The start-to-discharge pressure of such relief valve shall not be less than two hundred forty pounds per square inch gauge (240 psig) and not in excess of three hundred twelve pounds per square inch gauge (312 psig).
5. (e) On all hose one-half inch (1/2”) I.D. and larger, used for the transfer of anhydrous ammonia liquid or vapor, there shall be etched, cast, or impressed on the hose at five-foot intervals or on a nameplate permanently attached thereto, the following information: “Anhydrous Ammonia” Bursting Pressure Manufacturer’s Name or Trademark Year of Manufacture

Codification Notes: “I.D.” means inside diameter.