1.This Directive shall apply to simple pressure vessels (‘vessels’) manufactured in series with the following characteristics:
(a)the vessels are welded, intended to be subjected to an internal gauge pressure greater than 0,5 bar and to contain air or nitrogen, and are not intended to be fired;
(b)the parts and assemblies contributing to the strength of the vessel under pressure are made either of non-alloy quality steel or of non-alloy aluminium or non-age hardening aluminium alloys;
(c)the vessel is made of either of the following elements:
a cylindrical part of circular cross-section closed by outwardly dished and/or flat ends which revolve around the same axis as the cylindrical part;
two dished ends revolving around the same axis;
(d)the maximum working pressure of the vessel does not exceed 30 bar and the product of that pressure and the capacity of the vessel (PS × V) does not exceed 10 000 bar.L;
(e)the minimum working temperature is no lower than – 50 °C and the maximum working temperature is not higher than 300 °C for steel and 100 °C for aluminium or aluminium alloy vessels.
2.This Directive shall not apply to:
(a)vessels specifically designed for nuclear use, failure of which may cause an emission of radioactivity;
(b)vessels specifically intended for installation in or the propulsion of ships and aircraft;
(c)fire extinguishers.