What is the difference between hydrogen pipeline flame arresters and those for other flammable gases?
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:) The unit we are building has a hydrogen vent line equipped with a pipe flame arrester, and the designers did not provide clear specifications regarding the choice of flame arrester. Does anyone here have experience in this area?
The gas group for hydrogen is IIC (European system) or A (American system). They are the type of gas that is most prone to burning and exploding. The MESG corresponding to hydrogen is also the smallest among all combustible gases. Definition: Minimum Experimental Safe Gap (MESG). It refers to the minimum gap between the two parts that make up the interior chamber of a testing apparatus; this gap prevents the ignition of the external gas mixture through a 25mm-long joint, under specified conditions and for all concentrations of the gas or vapor being tested in air. The MESG is a property specific to each gas mixture. A pore height of 0.15mm is sufficient for the flame arrestor. To choose the thickness of the flame arrestor’s flame disc, you need to consider the diameter of your pipes. If it is less than or equal to DN 65, a flame arrestor disc thickness of 19 mm is recommended ； For DN 80~DN 350, the recommended thickness is 38mm ； If the size is larger than DN 350, a thickness of 76 mm is recommended. If you want to learn more, you can contact British Security Systems Ltd. to find out about the Amal brand.