CEN/TC 54/WG 9 - Revision of EN 286-2 and En 286-3

1.1   This document is applicable to simple unfired aluminium alloy pressure vessels, referred to as "vessel" in this document, designed for air braking equipment and auxiliary pneumatic equipment for railway rolling stock (see 1.6).
1.2   The vessels to this document are:
a)   made from a single shell;
b)   made from aluminium alloy;
c)   fabricated by welding;
d)   used at a maximum working pressure of 10 bar;
e)   the product of the maximum working pressure (in bar) and the volume (in litre): 50 bar litres < PV ≤ 10 000 bar litres;
f)   made of a cylindrical part of circular cross section called the shell with two outwardly dished torispherical ends, that is two dished ends with the same axis of rotation. This document therefore does not apply to vessels with one or two flat ends or those made up of several compartments;
g)   calculated with a design pressure P (See 5.1.4.2);
h)   designed for a working temperature of between −50 °C and +100 °C [+65 °C for certain grades of aluminium alloy (see 4.1.1)];
i)   fastened to the vehicles by straps.
1.3   In normal service, a momentary overpressure of 1 bar of the maximum working pressure is permitted (10 % of PS).
1.4   This document applies to the vessel proper, from the inlet connection to the outlet connection and to all other connections and fittings belonging to the vessel.
1.5   This document gives the requirements to be met for the calculation, design, fabrication, inspection during fabrication and certification of the vessel, and fittings for assembly to the vehicle.
These requirements cannot be written in sufficient detail to ensure good workmanship or proper construction. Each manufacturer is therefore responsible for taking every necessary step to make sure that the quality of workmanship and construction is such as to ensure compliance with good engineering practice.
This document gives:
a)   in Annex B, recommendations for assembly to the vehicles;
b)   in Annex C, recommendations for the service surveillance of vessels.
1.6   The requirements of this document apply to vessels designed to be fitted to rail vehicles used on the main national networks, urban networks, underground railways, trams, private networks (regional railways, company railways, etc.).

1.1   This document applies to the design and manufacture of welded, simple unfired pressure vessels manufactured in series, with a single or multiple compartment, here-in-after referred to as vessels.
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.
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 document, the use of "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 bar · l but does not exceed 10 000 bar · l. Below 50 bar · l use of this document is considered to fulfil the requirements of sound engineering practice;
d)   the minimum working temperature is not lower than −50 °C and maximum working temperature 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, or to fire extinguishers.
The document neither applies to transportation vessels nor to vessels which also contain substances other than air or nitrogen which could adversely affect their safety. For vessels to contain compressed air for braking systems of road vehicles and their trailers, see also EN 286-2. For vessels to contain compressed air for 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.
1.4   For the purposes of calculations required to be made in accordance with this document, dimensions are in millimetre, pressures are in bar (except otherwise specified), stresses are in newton per square millimetre and temperatures are in degree Celsius.

1.1   This document applies to the design and manufacture of simple unfired pressure vessels manufactured in series, for air brake equipment and auxiliary pneumatic equipment for railway rolling stock.
It defines three types of vessel A, B and C (see Table 1) corresponding to the current practice of European railway networks.
1.2   The vessels in this document are:
a)   made from a single shell;
b)   made from non-alloy steel;
c)   fabricated by welding;
d)   used at a maximum working pressure up to 15 bar;
e)   the product of the maximum working pressure (in bar) and the volume (in litre): 50 bar litres < PV ≤ 10 000 bar litres;
f)   made of a cylindrical part of circular cross-section called the shell with two outwardly dished torispherical ends, that is two dished ends with the same axis of rotation. This document therefore does not apply to vessels with one or two flat ends or those made up of several compartments;
g)   calculated with a design pressure P (see 5.1.4.1.2);
h)   designed for a working temperature of between −40 °C and +100 °C;
i)   fastened to vehicles:
1)   by straps for types A and B vessels,
2)   by welded brackets for types B and C vessels.
1.3   In normal service, a momentary overpressure of 10 % of PS, the maximum working pressure PS, is permitted.
1.4   This document applies to the vessel, from the inlet connection to the outlet connection and to all other connections and fittings belonging to the vessel.
1.5   This document gives the requirements to be met for the calculation, design, fabrication, inspection during fabrication and certification of the vessel, and fittings for assembly to the vehicle.
These requirements cannot be written in sufficient detail to ensure good workmanship or proper construction. Each manufacturer is therefore responsible for taking every necessary step to make sure that the quality of workmanship and construction is such as to ensure compliance with good engineering practice.
This document gives:
a)   in Annex B, recommendations for assembly to the vehicles;
b)   in Annex C, recommendations for the service surveillance of type A vessels;
c)   in Annex D, recommendations for the service surveillance of types B and C vessels.
The requirements of this document apply to vessels designed to be fitted to rail vehicles.
Table 1 - Definition of types of vessel
[table not reproduced]

1.1   This document applies to the design and manufacture of simple unfired serially pressure vessels, herein after referred to as vessels, designed for air brake equipment and auxiliary systems for motor vehicles and their trailers, and which:
a)   include fabrication by welding;
b)   have a simple geometry enabling simple-to-use production procedures. This is achieved by either:
1)   a cylindrical shell of circular cross section closed by outwardly dished and/or flat ends having the same axis of revolution as the shell; or
2)   two dished ends having the same axis of revolution;
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 intended to contain only compressed air, and which operate within the following constraints:
a)   subjected to an internal 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;
c)   maximum working pressure 30 bar, the product of that pressure and the capacity of the vessel (PS ∙ V) is greater than 50 bar l and not exceeding 1 500 bar l;
d)   capacity not exceeding 150 l;
e)   minimum working temperature not lower than −50 °C and maximum working temperature not higher than 100 °C for aluminium vessels and not higher than 150 °C for steel 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, or to fire extinguishers.