GZW-Ⅰ deflagration type Pipeline Fire combustible gas Pipeline Fire, is a new product replacement. The flame arrester performance in full compliance with GB13347-92 "oil and gas pipeline flame arrester and test methods" requirement. Flame arrester reasonable structure, fire resistant layer made of stainless steel, corrosion-resistant and easy to clean. Housing made of stainless steel, carbon steel and cast a variety of materials to meet the various needs of different process piping. The main purpose of an upper flammable gas pipeline 2, 3 flare systems, vapor recovery system 4, furnace fuel gas pipe line 5, Tonghua gas purification system 6, 7 gas analysis system, coal mine gas drainage system. The main performance 1, flame arrester 13 consecutive times to subsonic flame, every time to prevent the flame through 8, hydrostatic testing 2.4MPa no leakage model caliber main dimensions DN (mm) PN (MPa) Dimensions (mm ) threaded bolt KD DL L number GZW-20 DN20 1.6 75 105 195 200 4 M12 GZW-25 DN25 85 115 195 200 4 M12 GZW-40 DN40 110 150 245 240 4 M16 GZW-50 DN50 125 165 245 240 4 M16 GZW- 80 DN80 160 200 280 250 8 M16 GZW-100 DN100 180 220 335 260 8 M16 GZW-150 DN150 240 285 460 360 8 M20 GZW-200 DN200 295 340 520 420 12 M20 GZW-250 DN250 355 405 580 430 12 M24 GZW- 300 DN300 410 460 705 450 12 M24 GZW-600 DN600 770 840 1120 580 20 M33 maintenance and repair in order to ensure that the flame arrester performance to security purpose, flame arrester should be checked regularly for maintenance. 1, the flame arrester inspected once every six months to check fire resistant layer core is blocked, deformation, corrosion. 2, was found to be blocked fire resistant layer core should be cleaned to ensure that each hole on the core flow, deformation and corrosion for fire resistant layer should be replaced. 3, reinstall fire resistant layer core, should ensure not leak tight joint surface.