This is testing carried out by Gexcon. It shows the practice of venting from a coal dust explosion. Explosion Hazards Limited, with 40 years of experience in explosion protection, is part of the ATEX multinational group that form's the first total process fire and explosion protection source, providing integrated survey, design and engineering solutions for your safety requirements. Visit us at: http://www.explosionhazards.co.uk/ or Facebook: https://www.facebook.com/pages/Explosion-Hazards/128043353922568 Twitter: https://twitter.com/#!/explosionhazard