BS EN 437:2018 pdf free.Test gases – Test pressures – Appliance categories.
BS EN 437 Category I2H3B/P: appliances capable of using gases of group H of the second family and gases of the thirdfamily. The second family gases are used under the same conditions as for category I2H. The third famgases are used under the same conditions as for category 13B/P.
Category l2H3+: appliances capable of using gases of group H of the second family and gases of the thirdfamily. The second family gases are used under the same conditions as for category I2H.The third familygases are used under the same conditions as for category l3+.
Category ll2H3P: appliances capable of using gases of group H of the second family and gases of group P ofthe third family. The second family gases are used under the same conditions as for category l2H. The thirdfamily gases are used under the same conditions as for category 13P.
Category lI2L3B/P: appliances capable of using gases of group L of the second family and gases of the thirdfamily.The second family gases are used under the same conditions as for category I2L. The third familygases are used under the same conditions as for category I3B/P.
Category l12L3P: appliances capable of using the gases of group L of the second family and gases of Group Pof the third family. The second family gases are under the same conditions as for category l2L. The thirdfamily gases are used under the same conditions as for category I3P.
Category l2E3B/P: appliances capable of using gases of group E of the second family and gases of the thirdfamily.The second family gases are used under the same conditions as for category I2E.The third familygases are used under the same conditions as for category 13B/P.
Category ll2E+3B/P: appliances capable of using gases of group E of the second family and gases of thethird family.The second family gases are used under the same conditions as for category I2E+. The thirdfamily gases are used under the same conditions as for category 13B/P.BS EN 437 pdf download.