Special flange...or not???

[ElCidCampeador]

Hi,

one of my clients wants to rebuild a small pipeline of a old project ('80 years), which consists of a tube from rolled plate and welded at the both ends 2 flanges as sketch below:

These flanges are welding neck and they also have a small strange cave for O-Ring gasket, as you can see.

Do you know any ASME/EN/DIN standard related to this kind of flange available on the market or do you think it's a special one, so I have to get from forged bar by mechanical working?

Thank you

 

[LittleInch]

Got a picture?
That sketch is a bit vague.

Is the matching flange the same or are they some kind of tongue and groove?

Figure 6 of ASME B 16.5 has dimensions.

If it is an O ring I'm not sure what flange type applies so might be a special. Anything stamped onto the flange itself?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[GBTorpenhow]

RTJ?

 

[Christine74]

Yes it looks like a Ring Type Joint to me. Check the groove dimensions against those in Table 5 in ASME B16.5.


-Christine

 

[ElCidCampeador]

Nope, it's not a classic RTJ acc.to B16.5.

Please notice that the internal part after the "groove" is higher than the finishing surface of flange (you can see clearly in the sketch).

I think it's more similar to EN 1092-1 TYPE H here below:

but also in this case dimensions don't match with EN 1092-1 flanges.

And sorry I don't have photos :-(

 

[LittleInch]

I think it's more similar to EN 1092-1 TYPE H here below:

What are the dimensions then?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[SnTMan]

Does it not mate with Type G?

Regards,

Mike




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