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New Safety Guidelines Developed for Two-tank
Anhydrous Ammonia Wagons

OACFA News

Iowa State University Extension, July 3, 2012

Each year in Iowa approximately a billion pounds of nitrogen is applied as anhydrous ammonia. As equipment has gotten larger, many dealers are now using multi-tank systems with two anhydrous ammonia tanks mounted on to a single wagon running gear.

With anhydrous ammonia under pressure, safety is always a concern when plumbing and working around application equipment. “Plumbing for a multi-tank system presents unique challenges,” according to Mark Hanna, Iowa State University Extension ag engineer. “Valve location and selection are important decisions impacting safe use. As an example, valves meant to provide excess-flow protection should not be oversized.”

A new set of voluntary guidelines for plumbing multi-tank anhydrous ammonia systems has been recently developed by a coalition of state government, academia and industry representatives. As the use of multi-tank systems increases, tank owners should benefit by having these voluntary guidelines.

The guidelines, including sketches of suggested plumbing configurations, can be viewed under the news section at www.agribiz.org. The guidelines are voluntary, but dealers and applicators with multiple-tank systems are encouraged to consider the recommendations as equipment is readied for the fall application season.


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