Month: March 2014

DGN Flashback Arrestors FAQs

Posted On: March 26, 2014 by Kristen Cifranic

Frequently Asked Questions: 1. Why do I need flashback arrestors? Answer: If the torch and/or regulator are misused, an accident called a flashback could occur. A flashback is an ignition of mixed gases which flows back to the source of the gases such as the hose, regulator, and cylinder at a speed which is greater than five times the speed of sound, creating the risk of injury or equipment damage. 2. Why aren’t flashback arrestors built in the torch or regulator? Answer: Flashback arrestors should be checked on a routine basis to ensure they continue to offer maximum protection. If arrestors were an integral part of the torch, it would require the torch to be taken out of service for routine inspection. External flashback arrestors are much easier to replace even in the field and because they are external to the torch, can have larger component parts for higher flow, and longer service life. 3. Why is high gas flow capacity important when choosing a flashback arrestor? Answer:

Posted in: DGN Flashback Arrestors, Replacing Flashback Arrestors, High Gas Flow Capacity, Gas Flow, OSHA

How Safe Are Your Flashback Arrestors?

Posted On: March 13, 2014 by Kristen Cifranic

A quality flashback arrestor should have a stainless steel flame barrier and low porosity. (The flame barrier is the part of a flashback arrestor that actually stops the flashback.) Low cost or discount flashback arrestors often use a barrier made of bronze and with a high level of porosity (20-40 microns). This allows the manufacturer to save money, but can possibly put the user in danger, because bronze is an alloy containing a large portion of copper.          Under certain circumstances acetylene can react with copper to form readily explosive compounds. As long as the flashback arrestor manufacturer is constantly monitoring the copper content of the bronze flame barrier, there is no reason to be concerned. However, many discount flashback arrestor manufacturers do not hold themselves to the level of testing and self-scrutiny that is required for these safety devices. All SuperFlash flashback arrestors use a high quality sintered stainless steel

Posted in: Quality Flashback Arrestors, Stainless Steel Flame Barriers, Flashbacks
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