CEN/TC 54/WG 5 - Accumulators

1.1   This European Standard specifies the requirements for materials, design, manufacture, testing inspection, safety equipment configuration and documentation (including instructions for first operation), for commonly-used types of gas-loaded accumulators and pressure vessels used to provide additional gas capacity for fluid power applications (see 1.2).
1.2   This European Standard applies to the following types of components, defined as the pressure-containing envelope of gas-loaded accumulators:
-   bladder type;
-   diaphragm type;
-   piston type;
-   transfer type;
-   pressure vessels used to provide additional gas capacity.
They consist of one or several parts joined together by a variety of mechanical means and by welding.
1.3   This European Standard applies to gas-loaded accumulators which operate with the following conditions:
-   subject to an internal gauge pressure greater than 0,5 bar;
-   working temperature not lower than -50 °C and not higher than +200 °C;
-   containing all liquids and gases as defined in the Pressure Equipment Directive 2014/68/EU,
see Note.
NOTE   When the accumulator contains Group 1 liquids or gases, consideration relating to risks other than those required by Pressure Equipment Directive 2014/68/EU are not covered by this European Standard and must be assessed separately.

This European Standard specifies the requirements for materials, design, manufacture, testing inspection, safety systems and documentation (including instructions for first operation), for commonly-used types of gas-loaded accumulators and gas bottles for fluid power applications (see 1.2).
1.2   This European Standard applies to the following types of components, defined as the pressure-containing envelope of gas-loaded accumulators:
-   bladder type;
-   diaphragm type;
-   piston type;
-   transfer type;
-   gas bottles used to provide additional gas capacity.
They consist of one or several parts joined together by a variety of mechanical means and by welding.
1.3   This European Standard applies to gas-loaded accumulators which operate with the following conditions:
-   subject to an internal gauge pressure greater than 0,5 bar;
-   working temperature of not lower than 50 °C and not higher than +200 °C;
-   containing Group 2 liquids and gases as defined in the Pressure Equipment Directive 97/23/EC.
It does not apply to:
-   accumulators for use with dangerous fluids (see NOTE 1).
NOTE 1   Fluid power applications utilize non-dangerous fluids as categorized in ISO 6743-4 in addition to an inert gas (e.g. nitrogen) which is used as the pre-charging medium.
NOTE 2   There are no design limits to the volume of the accumulator.

1.1 This European Standard specifies the requirements for materials, design, manufacture, testing inspection, safety systems and documentation (including instructions for first operation), for commonly-used types of gas-loaded accumulators and gas bottles for fluid power applications (see 1.2).
1.2   This European Standard applies to the following types of components, defined as the pressure-containing envelope of gas-loaded accumulators:
-   bladder type;
-   diaphragm type;
-   piston type;
-   transfer type;
-   gas bottles used to provide additional gas capacity.
They consist of one or several parts joined together by a variety of mechanical means and by welding.
1.3   This European Standard applies to gas-loaded accumulators which operate with the following conditions:
-   subject to an internal gauge pressure greater than 0,5 bar;
-   working temperature of not lower than -50 °C and not higher than +200 °C;
-   containing Group 2 liquids and gases as defined in the Pressure Equipment Directive 97/23/EC.
It does not apply to:
-   accumulators for use with dangerous fluids (see NOTE 1).
NOTE 1   Fluid power applications utilize non-dangerous fluids as categorized in ISO 6743-4 in addition to an inert gas (e.g. nitrogen) which is used as the pre-charging medium.
NOTE 2   There are no design limits to the volume of the accumulator.