Our friends at IBEDA, Germany created videos about the importance of using flashback arrestors while welding, cutting or in allied processes. Using safety devices, like those manufactured by IBEDA, on a global scale has led to a continually decreasing number of accidents in this industry. IBEDA did a great job of translating this report from German to English, and they created a short video on how flashback arrestors are tested at their facility. See their video below on how flashback arrestors are tested. See their PVGD demonstration