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Pressure Equipment Directive

Pressure Equipment Directive (PED) 97 / 23 / EC for ERV Rubber Expansion Joints

Elaflex rubber expansion joints ( type ERV ) used within the European Community are ‘pressure equipment’ according to this directive. The following category classifications apply :

  1. Expansion joints for L.P. Gas ( liquefied gases) :
    up to DN 40 PN 25 bar category I
    from DN 50 up to DN 125 PN 25 bar category II
    DN 150 PN 25 bar category III
  2. Expansion joints for liquid chemicals and petroleum based products:
    up to DN 125 up to 16 bar working pressure = no category
    DN 150 up to 10 bar working pressure = no category
    DN 200 up to 10 bar working pressure = no category
    DN 250 from 8 up to 10 bar working pressure = category I
    DN 300 from 7 up to 10 bar working pressure = category I
    DN 350 from 6 up to 10 bar working pressure = category I
    DN 400 from 5 up to 10 bar working pressure = category I
    DN 500 from 4 up to 10 bar working pressure = category I
    DN 600 from 3,5 up to 10 bar working pressure = category I
    DN 700 from 3 up to 10 bar working pressure = category I
    DN 800 from 2,5 up to 10 bar working pressure = category I
    DN 900 from 2 up to 10 bar working pressure = category I
    DN 1000 from 2 up to 10 bar working pressure = category I
  3. Expansion joints for gas/ natural gas :
    If the expansion joint is intended for use with gas/ natural gas, this has to be stated when ordering.

    up to DN 25 = no cetegory
    from DN 32 up to DN 50 PN 16 bar = cetegory I
    from DN 65 up to DN 125 PN 16 bar = cetegory II
    from DN 150 up to DN 350 PN 10 bar = cetegory II
    from DN 400 = cetegory III
  4. Expansion joints for air :
    If the expansion joint is intended for the use with air, this has to be stated when ordering.
    up to DN 100 up to 10 bar working pressure = no category
    from DN 125 up to DN 250 up to 5 bar working pressure = no category from
    DN 250 up to DN 1000 up to 3,5 bar working pressure = category ITo define the right category for all dangerous fluids or pressures not mentioned here, an inquiry is necessary. Please state medium, dimension, pressure, temperature and application.

Requirements:

‘no category’ These expansion joints do only have to conform to ‘sound engineering practice’ ( S EP ). No declaration of conformity is necessary. For these expansion joints the CE marking must not be used.
‘category I’ A certificate of conformity for the materials ( at least EN 10204-2.2 ), a random pressure test, a declaration of conformity*) and a CE marking of the expansion joints are necessary.
‘category II’ A specific test report for the materials ( at least EN 10204-3.1 ), the pressure test of every joint, he declaration of conformity*) and a CE marking of the expansion joint with code number of the notified body are necessary.
‘category III’ As category II, but requires additional inspection by the notified body and individual approval.

The manufacturer of the expansion joints is responsible for the adherence to these requirements. Rubber bellows or flanges alone are no pressure equipment according to this directive.
For the manufacturing of expansion joints ELAFLEX has been certified by Germanischer Lloyd. A copy of the certificate no. 88351 – 13 HH is available on request.

*) Declarations of Conformity :

According to the PED, ELAFLEX customers may directly download the necessary declarations of conformity. Please use this free service under www.elaflex.de/en/certificates/ .