Should an acetylene flame arrester be installed at the cutting torch end or the gas cylinder end?

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Should an acetylene flame arrester be installed at the cutting torch end or the gas cylinder end? Are there clear regulatory requirements? ----------------------------------------------------------------------------------- \"Spring Has Arrived in Haichuan\" is a seasonal event held in the leisure area, as well as on the forum. It has the following features: -- The event is organized by the leisure area as a whole, with participants sharing the beautiful spring scenery from various places. -- Many forum users take part in it; last year, over 100 users shared more than 300 posts. -- The event runs from late March to mid-May, spanning two months, which allows companies to be properly showcased and attract attention. We welcome companies that are interested in sponsoring this event; such sponsorship can help increase the company’s visibility and also serve as support for the Haichuan sharing platform. ------------------------------------------------------------------------------------------------------ We invite all users of Haichuan to actively participate in these sharing activities – let’s share happily and enjoy the beauty of spring together. --------------------------------------------------------------------- 【Spring has arrived in Haichuan】Haichuan users gather in Chengdu – The first gathering of Chengdu’s Haichuan users: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1953290 (Source: Haichuan Chemicals Forum Website) 【Spring has arrived in Haichuan】Original post – Searching for spring all day long, yet still unable to find it ； Spring is already in sight, to some extent! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1941700 (Source: Haichuan Chemicals Forum) 【Spring has arrived in Haichuan】 Micro azalea bonsai still under refinement https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1945263 (Source: Haichuan Chemicals Forum) 【Spring has arrived in Haichuan】 The cuttings of bougainvillea have blossomed https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1944836 (Source: Haichuan Chemicals Forum) 【Spring has arrived in Haichuan】——Plum blossoms have bloomed! ! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1946084 (Source: Haichuan Chemical Industry Forum) 【Spring has arrived in Haichuan】The red maples (grown by Xingxing) have begun to sprout leaves. https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1946247 (Source: Haichuan Chemical Industry Forum) 【Spring has arrived in Haichuan】——View the lanes with black-tiled roofs and green stones in the Jiangnan region, willows by the Su Causeway shrouded in mist, and apricot blossoms covering the branches! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1946871 (Source: Haichuan Chemical Industry Forum) 【Spring has arrived in Haichuan】 Azaleas that have just been transplanted into new pots. https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1947023 (Source: Haichuan Chemical Industry Forum) 【Spring has arrived in Haichuan】 A gentle breeze blows; I’m going to the ends of the earth! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1953708 (Source: Haichuan Chemical Industry Forum) 【Spring has arrived in Haichuan】 As winter gives way to spring, flowers bloom from time to time. https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1953306 (Source: Haichuan Chemical Industry Forum) 【Spring has arrived in Haichuan】——Meeting magnolias after a spring rain! ! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951152 (Source: Haichuan Chemical Industry Forum) 【Spring has arrived in Haichuan】Pingzhi Xunzi https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1950405 (Source: Haichuan Chemical Industry Forum)