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Welcome to DIERS

The Design Institute for Emergency Relief Systems (DIERS) was formed in 1976 as consortium of 29 companies to develop methods for the design of emergency relief systems to handle runaway reactions. DIERS spent $1.6 million to investigate the two-phase vapor-liquid onset / disengagement dynamics and the hydrodynamics of emergency relief systems. Of particular interest to DIERS were the prediction of two-phase flow venting and the applicability of various sizing methods for two-phase vapor-liquid flashing flow.

DIERS became a Users Group in 1985 with over 200 companies (75 percent domestic and 25 percent international) ultimately requesting membership and having their corporate representatives participate in the semi-annual meetings.

DIERS (formerly the DIERS Users Group) is a Technical Entity within the AIChE. Individuals with at least a Bachelor Degree in a STEM field are eligible to become members of DIERS.”

Next DIERS Meeting: October 13-15, 2021 (Virtual)


For membership information, contact

Harold G. Fisher, Chair of DIERS

229 Brookhaven Drive
Nitro, WV 25143
Phone: 304-776-6371
Fax: 304-776-1076
E-mail at fisherhg@suddenlink.net

For more information about DIERS printed books and software, click here or contact AIChE

120 Wall Street
New York, NY 10005
Customer toll-free number: 800-242-4363
Fax: 646-495-1501
Email at anilg@aiche.org

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