Anhydrous ammonia system definition
Anhydrous ammonia system or "system" means, with regard to the handling or storage of anhydrous ammonia, a container or containers with a minimum capacity of not less than five thousand gallons or any appurtenances, pumps, compressors, or interconnecting pipes associated with such a container or containers. "Anhydrous ammonia system" does not include equipment for the manufacture of anhydrous ammonia or the storage of anhydrous ammonia either underground or in refrigerated structures.