Ammonium Hydroxide (NH4OH) Handling Design, Loading, and Installation.

Although no two Ammonium hydroxide loading solutions will be identical, the product itself determines much of the critical design criteria that will ensure that optimum safety and productivity can work together in harmony. 

What is Ammonium hydroxide?  Ammonium hydroxide, also called aqueous ammonia, ammonia solution, or ammonia water is a solution of ammonia gas in water. Ammonia hydroxide is a colorless aqueous solution with a pungent aroma. Typically aqueous ammonia is specified at concentrations of 19%, 25%, or 29% pure ammonia. Commercial grade anhydrous ammonia, however, is 99.5 to 99.7% pure, with a minimum of 0.3% water content.

In the United States, Ammonium hydroxide is a “tight-fill” (closed-loop) loading operation and is (un)loaded into rail cars via chemical hoses or 3” stainless steel loading arms. Ammonium hydroxide, if not handled properly can cause serious injuries and Personal Protective Equipment (PPE) is required. Additionally, because operators are on top of the vehicles during the loading process, robust, well-designed fall prevention is essential to ensure increased throughput, without compromising operator safety.

Ammonium hydroxide is typically shipped in 26,000 gallon DOT-111 insulated or non-insulated tank cars with safety valves.  The rails cars themselves are ~ 9′ outside diameter with an overall length of ~45’ to 50′, with a 6’ x 6’ center opening or off-set crash box openings.


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