PDFWAC 296-826-40010
Hose specifications.
(1) You must make sure hose used in ammonia service and subject to container pressure meets both of the following:
(a) The Joint Rubber Manufacturers Association, RMA-IP-14, Specifications for Anhydrous Ammonia Hose 7th Edition 2003; and
(b) The Fertilizer Institute's Hose Specifications for Anhydrous Ammonia.
(2) You must make sure hose assemblies are able to withstand a 500 psig pressure test.
(3) You must follow Table 4 for hose specifications.
Table 4
Hose Specifications
If you have: | Then: | |
Hose subject to container pressure | Design it with a minimum working pressure of 350 psig; and | |
Burst pressure of 1750 psig. | ||
Hose and their connections | Design them for the maximum low side working pressure when located on either: | |
1. | The pressure reducing valves on devices discharging to atmospheric pressure; or | |
2. | The low pressure side of flow control. | |
Design, construct, and install so there is no leakage when connected. | ||
Liquid transfer hose that is not drained of liquid upon completion of transfer operations | Equip with an approved shut off valve at the discharge end. | |
Prevent excessive hydrostatic pressure in the hose. | ||
Hose with an outside diameter one-half inch and larger | Make sure the hose is marked and legible at 5-foot intervals. | |