Equivalent valve standard 3

[cranekiran]

Hi,

I would like to know from this forum the equivalent British En standard for ASME-B 16.34,specifically the temperature/ pressure rating for different classes of valve body materials.Also it will be very helpful if you can give me the ASME standard for the hazard analysis of valves.

Thanx&Regards
Cranekiran

 

[unsy]

The new standard to be released will be BS EN 12516. It will be a 3 part standard, you need part 1 (Tabulation method). Not sure if it is past pr status yet. It is basically a direct copy of B16-34 so don't expect anything exciting.

With the hazard analysis what are you looking for, are you addressing the PED?

 

[cranekiran]

Yes!!

I am referring to P.E.D for the hazard analysis.

Many thanks for the equivalent standard.One small doubt,if the standard is already designated as BS-EN then it must have crossed the Pr stage or else it would be Pr-En....

Thanks once again.I am Waiting for your next reply!!

Bye!!

 

[unsy]

The copy I have is Pr-En however I assumed that when it is released it will become BS-EN ....

With regard to the PED the hazard analysis is something that is covered by the directive only and is handled between individual manufacturers and their notified body. I don’t know of any ASME standard that covers this and would be surprised if there is one as the PED is European legislation.

 

[NGiLuzzu]

Just for information, the situation of the European standards (see

http://www.cenorm.org/cenorm/index.htm

and look for the drafts by the "CEN/TC 69" Technical Comittee) in object is, at the moment, the following:

* Prelim. Std.: prEN 12516-1
Title: VALVES - SHELL DESIGN STRENGTH - PART 1: TABULATION METHOD FOR STEEL VALVE SHELLS
Date: October 2000

* Prelim. Std.: prEN 12516-2
Title: VALVES - SHELL DESIGN STRENGTH - PART 2: CALCULATION METHOD FOR STEEL VALVE SHELLS
Date: November 2000

* Standard: EN 12516-3
Title: VALVES - SHELL DESIGN STRENGTH - PART 3: EXPERIMENTAL METHOD
Date: October 2002
[Describes requirements for an experimental method to prove that representative samples of valve shells and their body ends, made in cast iron, steel or copper alloy materials, are designed to possess the required pressure containing capability, with an adequate margin of safety]

* Prelim. Std.: prEN 12516-4
Title: VALVES - SHELL DESIGN STRENGTH - PART 4: CALCULATION METHOD FOR VALVE SHELLS IN METALLIC MATERIALS OTHER THAN STEEL
Date: ? (Under development)

As the only relevant released BS is 12516-3, I think the British Standards Institute (see

http://www.bsi-global.com/index.xalter)

is going to ratify the other parts as soon as they are released by CEN as EN standards.

If you're interested in other European standards, having an approach different from ASME B16.34 (involving case-by-case design and/or verification), I'd suggest to refer to the following:
* Standard: EN 12516-3
Title: VALVE BODIES; STRENGTH CALCULATION IN RESPECT OF INTERNAL PRESSURE
Date: September 1982
[This Standard is included in DIN Handbook 182. Specifies the strength calculation of plain (i.e. not ribbed) valve body components subjected to pressure and made from metallic materials. Within the meaning of this standard, the components discussed here include valve bodies proper and valve body closures and ends such as heads, covers, flanged and special closures. Inserted components subjected to pressure such as gate valve discs and globe valve plugs shall be treated in a similar fashion.]

Hope this can be useful...
Bye, 'NGL

 

[NGiLuzzu]

ERRATA CORRIGE (!):
The last above mentioned standard should not be EN 12516-3, of course, but DIN 3840.
Sorry for the copy/paste error!!! ;-)

 

[cranekiran]

Dear Anegri,

Sorry for the belated reply.Actually I was busy on some site work and could not check mail.

Many thanks for your in-depth reply for the Equivalent valve standard.

Great Reply!!!

Thanks,It was usefull.We are procuring all the standards you have mentioned.

Bye!