NDLI: Ignitability of Spray Clouds of Organic Solvents, Solvent/Water Mixtures, and Water-Based Paints by Electric Sparks, Arcs, and Open Flames

Content Provider	IEEE Xplore Digital Library
Author	von Pidoll, U.
Copyright Year	1972
Abstract	The ignitability of spray clouds of organic solvents, solvent/water mixtures, and water-based paints by electric discharges and open flames was investigated under worst-case conditions that typically apply to electrostatic paint spraying. More than 200 substances were sprayed with a high-rotation bell spraying device. Rotation speed, substance throughput, and shaping air were optimized in order to achieve an individual ignition optimum for each substance. Organic solvents with flash points between 38 and 150degC showed a minimum ignition energy of about 7 mJ, independent of their flash point. Solvent/water mixtures and water-based paints typically had much higher minimum ignition energies from approximately 75 mJ and upwards. The substances were divided into three groups according to their ignition behavior: (1) not ignitable by an open flame; (2) not ignitable by an electrical discharge of 4 J; and (3) all other substances. Simple formulas were given for water-based paints and solvents, thus allowing an easy classification into these three groups. It is planned to state the necessary safety precautions for each group in future standards on electrostatic paint spraying.
Sponsorship	IEEE Industry Applications Society
Starting Page	15
Ending Page	19
Page Count	5
File Size	389625
File Format	PDF
ISSN	00939994
Volume Number	44
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Solvents Thermal spraying Clouds Paints Sparks Fires Ignition Electrostatics Throughput Safety water-based paints Electrical discharges incendivity minimum ignition energy solvents spray clouds
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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