PED Harmonised Standard for Design

[Rajesh]

Dear All,

I undrstand that Harmonised Standard For pressure vessel design for
PED is being published. BSEN13445. I have some querries.

- If this help us in selection of material.
- When this standard is likely to be published.

Regrads

Rajesh

[Bathula Raghuram (Mumbai - PIPING)]

Just the below link for more information, interesting one
http://www.unm.fr/en/general/en13445/

published hormonised stanadrds for Directive 97/23/EEC can be seen at
http://ec.europa.eu/enterprise/newapproach/standardization/harmstds/reflist/equippre.html
and
http://www.newapproach.org/Directives/ProductFamilies.asp?97/23/EC

The attached list contains references to harmonised standards for pressure equipment and harmonised supporting standards for materials used in manufacturing pressure equipment.

The follwoing pretext taken from a CEN link may be helpful
A harmonised standards is a standard considered by the European Commission as satisfying some of the directives essential safety requirements.

Harmonised standards are covered by three types of European Standard:-

* Harmonised Product Standards
These are application codes that cover the design and manufacture of Pressure Vessels, Boilers and Pipework

* Harmonised Support Standards
Welding, NDT and other standards that supplement the application codes.

* Harmonised Material Standards
A material specified in a harmonised standard will satisfy the requirements of the directive in terms of ductility, toughness and strength but does not guarantee that the material will be suitable for a specific application.

Each harmonised standard will contain an annex stating which essential safety requirements it satisfies. The advantage of using these standards is that no additional justification is required that essential safety requirements have been met and providing the standards have been correctly applied the design of the equipment can not be challenged.

Another advantage of using Harmonised Standards is that they provide an interpretation of the directive. For example if a pressure vessel is to operate below zero the impact tests on the material and welding procedures have to be carried out the lowest operating temperature the vessel will experience according to ESR 7.5. This is not current practice as far as either PD5500 or ASME VIII is concerned as both these standards permit, under certain circumstances, warmer impact test temperatures.

Harmonised Standards are not essential, any appropriate standard can used but the satisfaction of essential safety requirements must proved. Both PD5500 and ASME VIII have produced annexes stating how and which essential safety requirements they claim to satisfy, these annexes have not been approved by the European commission and therefore neither standard can claim to be harmonised.

Note PD5500 has nothing to do with the PED, it is simply the latest revision of BS5500, it no longer has the status of a British Standard because it will conflict with BSEN13445. It is now a Published Document rather than a standard, This will make no difference to it as it will continue to be supported as long as its popularity remains

The harmonised standard for the qualification of welding personnel is EN ISO 9606, for operating procedures it is EN ISO 15614. (Note EN ISO 15614 only satisfies the requirements of E.S.R 3.1.2 it does not satisfy the requirements for welding consumables stated in E.S.R 4)

[raj vikhar]

Hi Rajesh

 

Raj Here ...I am working with Aibel Norway Now palced in Singapore

 

I am also newly working on this Europian Standard

 

So after 2002 EN 13445 is hormonised standard for all pressure vessel above 0.5 bar

 

For selection of material kindly refere chapter 2 .

 

For all Europian market this is mandatory now.

 

 

with regards

 

Rajesh Vikhar

 

Sr Mechanical Engineer

 

Aibel As Stavanger Norway

 

 

--
cheers......