About the Author
Dr.-Ing. Henrikus Steen studied Thermodynamics and Chemical Engineering at the Technical University of Braunschweig. From 1965, he worked as scientific collaborator of Karl Nabert and Prof. Gerhard Schön at the Physikalisch-Technische Bundesanstalt (PTB), Braunschweig. He occupied himself with all problems of safety techniques, especially with explosion prevention and protection when handling flammable liquids. 1973 he obtained his doctor’s degree from the Technische Hochschule Aachen with a thesis on the vaporization in spray jets. Also in 1973, he became head of laboratory “Flammable Liquids” at the PTB. In 1980, he became head of the division “Fundamentals of Physical Safety techniques” at the PTB, and from 1989 to 1995, he headed the Department “Chemical Safety Techniques” at the Federal Institute of Materials Research and Testing (BAM), Berlin.