Details of the hydrogen flame arrester: hydrogen flame arrester is a safety device to prevent hydrogen flame spread outward. Which comprises a through gas passage having a plurality of small slits or solid material (fire retardant element) formed. Fire element requires gaps or channels as small as possible, so that when the flame arrester after entering, is divided into many small flame arrester element flow, heat transfer due to the role of (the gas is cooled) and the wall effect, flame quenching flow. References the following criteria are as follows: GB / T4237-1992 hot-rolled stainless steel GB / T6414-1986 casting dimensional tolerances GB / T9438-1988 aluminum castings GB / T9439-1988 gray iron castings GB 5908-1986 oil storage tank flame arrester resistance Fire performance and experimental methods GB / T1804-1992 General tolerances for linear dimensions without individual tolerance GB / T13306-1991 signs GB / T13384-1992 electromechanical products packaging technology JB 78-59 cast iron flanges SY 5302-87 oil drilling machinery Products with gray iron castings General technical parameters ZB G 33001-85 PTFE Pipe ZB G 33003-85 PTFE Rod ZB G 33004-85 PTFE film two, works by the most able arrester Many small gas, uniform or non-uniform channels or pores of a solid material consisting of, the requirements of these channels or pores as small as possible, as long as through small flame can. Thus, the flame arrester after entering into many small streams of flame is extinguished. The mechanism of the flame can be extinguished transfer of heat and the wall effect. (1) heat transfer effect can prevent flame arrester continues to spread and forced one of the factors is the heat effect of the flame is extinguished. We know that the flame arrester is composed of many small channels or pores, when the passage of flame into the tiny flame after the formation of many small streams. Because the channel or pore large heat transfer area, the flame for heat exchange through the channel walls, the temperature drop, to a certain extent, i.e., the flame extinguished. Tests showed that when the flame arrester material to improve thermal conductivity of 460 times, which is off diameter changes by only 2.6%. This shows that the material is a secondary issue. I.e., transfer of heat is a flame extinguished reason, but not the main reason. Therefore, for use as a barrier burst flame arrester, its choice of material is not too important. But considering its mechanical strength and corrosion-resistant properties should be chosen material in. (2) wall effect chain reaction theory based on the combustion and explosion that burn fried phenomenon is not a direct effect between molecules results, but in the external energy (heat, radiation, electricity, energy and other chemical reactions) of excited molecules split into a very lively and short life radicals. Chemical reaction is carried out by these free radicals. Radical action with another molecule, the result of addition to the role of a new product can also generate free radicals. Such a radical turn gave birth to a new consumption so keep going. Found themselves flammable gas mixture combustion (after the start of combustion, there is no effect of the external energy) conditions are: a new generation of free base is equal to or greater than the disappearance of free base. Of course, the system of self-combustion and reaction conditions such as temperature, pressure, gas concentration, size and materials, such as container. With the passage between the decreasing size of the flame arrester, free radicals and reactive molecules collision probability be reduced, while the Radicals and the channel wall but increased the chance of collision, thus reducing the urge radical reactions. When the channel size is reduced to a certain value, which caused a wall effect on the condition of the flame can not be continued, flame Jibei blocked. From this, the wall effect is the main mechanism of resistance flame arrester made. Thus the starting point, you can design a structure known species of flame arresters meet the needs of the industry.