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. |
[Statutory Authority: RCW
49.17.010,
49.17.040,
49.17.050. WSR 15-23-086, § 296-826-40010, filed 11/17/15, effective 12/18/15. Statutory Authority: RCW
49.17.010,
49.17.040,
49.17.050,
49.17.060. WSR 06-10-067, § 296-826-40010, filed 5/2/06, effective 9/1/06.]