Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Dispersed Liquid Agent Fire Suppression Screening Method (NISTIR 6242)



Jiann C. Yang, Michelle K. Donnelly, N C. Prive, William L. Grosshandler


The recent ban on halon 1301 production (as a result of its ozone depleting potential) has resulted in an extensive search for replacements and alternatives. The applications of fire suppression efficiency screening methods constitute an important aspect of this search process because good screening methods can facilitate the identification, comparison, and selection of potential candidates for halon replacement. Most of the current methods for fire suppression efficiency screening (e.g., cup burners) are designed for evaluating fire suppressant agents that can be delivered in the form of vapor. Potential uses of liquid agents as replacements have been recently proposed in several applications (e.g., shipboard machinery spaces, engine compartments in armored vehicles). Therefore, there is a need for the development of a reliable screening method for liquid agents that can be delivered in droplet form. The objective of our work is to design, construct, and demonstrate a laboratory-scale apparatus to screen liquid agents in a well-controlled experimental setting.
NIST Interagency/Internal Report (NISTIR) - 6242
Report Number


fire research, fire science, fire suppression, halon alternatives, droplets, drop sizes


Yang, J. , Donnelly, M. , Prive, N. and Grosshandler, W. (1998), Dispersed Liquid Agent Fire Suppression Screening Method (NISTIR 6242), NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed July 22, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created October 1, 1998, Updated November 10, 2018