Safety Advice. 21 – Storing gas cylinders.

(e.g. stores with flammable substances)is at least 5 m. A protective wall with aheight of 2 m and made of nonflammablebuilding material can be a substitute forthe safety distance.6. Protective area6.1. General requirements• The protective area and the risk ofexplosion must be indicated by warningsigns (see example of sign in 3 above).• There should be no sources of ignition inthe protective area.• Electrical equipment must have zone 2explosion protection.• Only those vehicles necessary to servethe store are permitted.• The protective area should not extend toneighbouring buildings or public paths orroads.6.2. Requirements for stores in roomsThe entire room is a protective area in thecase of rooms with a surface area of up to20 m 2 .Gaseslighter than air heavier than airHeight h1 (m)Radius r1 (m)Bottle Cylinder Bottle Cylinder2 2 1 12 2 2 36.3. Requirements for stores in the open• The protective area may be enclosed onmax. two sides by min. 2 m high protectivewalls without openings and madeof nonflammable building material. Onone side this wall may also be the wallof a building, which must not have anyopenings in the protective area.• In the store rooms there should be nopits, channels or drains to channels withoutliquid closures and there should beno cellar accesses or other open passagesto cellar rooms. Furthermore, thereshould be no cleaning or other openingsof chimneys.hrhlighter than air6.4. Dimensions of the protective areasrheavier than airFor flammable gases that are heavier thanair (e.g. propane, butane).For flammable gases that are lighter thanair (e.g. acetylene, methane, hydrogen).Linde AGLinde Gas Division, Linde Gas Germany, Seitnerstraße 70, 82049 PullachPhone 018 03.85 000-0*, Fax 018 03.85 000- 1, www.linde-gas.comSafety Advice. 21 – Storing gas cylinders. Page 2