Good morning all When do you consider that flashpoint of a liquid can produce an explosion and then needs to be Class Div?. See below some flammable liquid classification. Liquid with a flashpoint more than 140 ºF are considered safe or do we need to go over 200ºF?. Always considering that are in a tank and we are not heating it
Thank you for your answer and I wish you a nice weekend According to NFPA 497 liquids are classified as below 3.3.6 Flammable Liquid. Any liquid that has a closed-cup flash point below 100°F (37.8°C), as determined by the test procedures and apparatus set forth in NFPA 30 and a Reid vapor pressure that does not exceed an absolute pressure of 40 psi (276 kPa) at 100°F (37.8°C), as determined by ASTM D323, Standard Test Method for Vapor Pressure of Petroleum Products (Reid Method). 3.3.4 Combustible Liquid. Any liquid that has a closed-cup flash point at or above 100°F (37.8°C), as determined by the test procedures and apparatus set forth in NFPA 30. Combustible liquids are classified in accordance with the following: (1) Class II Liquid - Any liquid that has a flash point at or above 100°F (37.8°C) and below 140°F (60°C); (2) Class III Liquid - Any liquid that has a flash point at or above 140°F (60°C); (a) Class IIIA Liquid - Any liquid that has a flash point at or above 140°F (60°C), but below 200°F (93°C); (b) Class IIIB Liquid - Any liquid that has a flash point at or above 200°F (93°C). Kind Regards / Saludos cordiales / Mit freundlichen Grüßen Daniel Rodríguez CONFIDENTIALITY NOTICE: This e-mail communication and any attachments may contain proprietary and privileged information for the use of the designated recipients named above. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
