Flange EN 1092-1

[mike1488]

Good Afternoon

I have to Manufacture a valve in with the client is asking for flange Type 21 RF, B2, Pn 63 Dn 25

See if im correct. what I understand about type 21 is is a integral flange. Integral flange with the body of the valve without any welding.

My big consern is the B2. B2 is the finishing of the rised face.
im use to using B16.5. What i want to know is whats the equivalent to B16.5.
If b2 is stock finish or smooth finish or spiral serrated, etc.

Thank for the help and sorry for my bad english

 

[micalbrch]

B2 is Ra min. 0.8 and max. 3.2 microns, Rz min. 3.2 and max. 12.5 microns.

 

[mike1488]

Is it stock finishing but with those values of width and hight right?

Type 21 is integral flange correct. the must not have any wealding

 

[micalbrch]

Yes, it is stock finish.

 

[mike1488]

Thanks a lot for your help.
It was worth it.
Have a great day