Ammonia, in its various amounts of dilution, is a dangerous element. Anhydrous ammonia is classified as a toxic gas for the environment. It can form explosive mixtures upon reaction with air (16-25%)as it is a flammable gas (autoignition temperature 651 °C). Ammonia reacts violently with halogens as well. Due to the explosive nature of this gas, it is important to be very cautious about its storage & handling.

Handling Ammonia

  • You must be certified to work with anhydrous ammonia.
  • While working with ammonia, you must wear goggles, gloves, and use a breathing apparatus.
  • It is vital to drain all tanks, piping, and hoses of anhydrous ammonia completely before installing, removing, or repairing any equipment.
  • Have a sufficient amount of water before working with ammonia.

Installing & Operating Ammonia Valves

  • Ensure valve is turned off before installation & place in direction that it is in relation to the flow.
  • Apply pipe thread sealant to a male pipe thread (thread to be installed into a valve).
  • Install valve into a pipe or hose assembly and tighten using a wrench.
  • Before operating valve, ensure it is attached to appropriate piping & that an appropriate valve is attached to the outside.
  • Turn off any downstream valve that is open to prevent ammonia from spraying into air.
  • Never open the valve partially.
  • Never leave open valve unattended. It must be open only while in use.

Maintaining Ammonia Valves

  • Check valves regularly for any leaks.
  • If you observe any leak(s), try to tighten valve. If leaking persists, replace valve.
  • Check often if any valves seem worn out, consider replacing the worn out valves ASAP.

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