1.1 This part of this European Standard applies to the design and manufacture of welded, simple unfired
pressure vessels manufactured in series, with a single compartment, hereinafter referred to as vessels, the
essential safety requirements of which are given in Annex G.
It only applies to vessels that:
a) include fabrication by welding, but some designs can entail the use of bolts;
b) have a simple geometry enabling simple-to-use production procedures; this is achieved by either:
1) 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; or
2) two outwardly dished ends revolving around the same axis;
c) have branches not larger in diameter than 0,5 of the diameter of the cylinder to which they are welded.
1.2 It applies to vessels which are intended to contain air or nitrogen which are not intended to be fired and
which operate within the following constraints:
a) subjected to an internal gauge pressure greater than 0,5 bar;
b) the parts and assemblies contributing to the strength of the vessel under pressure to be made either
of non-alloy quality steel or of non-alloy aluminium or non-age-hardening aluminium alloys;
NOTE In this part of the standard, the term “aluminium” covers non-alloy aluminium and aluminium alloys.
c) the maximum working pressure is not greater than 30 bar. The product of the maximum working
pressure and the capacity of the vessel (PS V) is greater than 50 barl but does not exceed 10 000 barl.
Below 50 barl, use of this standard is considered to fulfil the requirements of sound engineering
practice;
d) the minimum working temperature is not 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.
It does not apply to vessels specifically designed for nuclear use, to vessels specifically intended for
installation in, or the propulsion of, ships and aircraft, nor to fire extinguishers.
The standard does not apply to transportation vessels nor to vessels which also contain substances other
than air or nitrogen which could adversely affect their safety. For vessels designed to contain compressed
air for the braking systems of road vehicles and their trailers, see also EN 286-2. For vessels designed to
contain compressed air for the braking systems of rail-mounted vehicles, see also EN 286-3 and EN 286-4.
1.3 It applies to the vessel proper, from the inlet connection to the outlet connection and to all other
connections required for valves and fittings. If bosses/pipes are used, the requirements specified herein
begin or end at the weld where flanges, if used, would have been fitted.
1.4 For the purposes of calculations required to be made in accordance with this standard, dimensions are
in millimetres, pressures are in bars (except where otherwise specified), stresses are in newtons per square
millimetre and temperatures are in degrees Celsius.
BS EN 286-1:1998 history
0000 BS EN 286-1:1998+A2:2005(2007)
1998BS EN 286-1:1998+A2:2005 Simple unfired pressure vessels designed to contain air or nitrogen - Pressure vessels for general purposes
1998BS EN 286-1:1998 Simple unfired pressure vessels designed to contain air or nitrogen — Part 1: Pressure vessels for general purposes