Forging thickness

[MichaelDexter]

Hi
What is correct forging thickness (see piping flange sketch) ? dim A, or B or C.
It is important for me for strength calculation

Thanks in advance

http://files.engineering.com/getfil...-8b6c-5da7004b8202&file=2015-08-28_122729.jpg

 

[BigInch]

https://www.asme.org/products/codes-standards/b165-2013-pipe-flanges-flanged-fittings-nps-12

http://www.texasflange.com/index.php/flange-dims-weights/ansi-b16-5-class-150-forged-flanges

 

[MichaelDexter]

Thank for links, but unfortunately I can't find answer
Michael

 

[racookpe1978]

Your question cannot be answered with "one" thickness.

The entire shape is stressed, and the thickness of every part of the fitting MUST BE within your specification for your piping code. A forged part is compressed in all areas as it is hit by forging tools and dies, and is subsequently machined to meet tolerances.

Are you thinking of the maximum thickness for a heat treatment maybe?

 

[LittleInch]

Agree with racookpe, whatever this thing is and it doesn't look like any flange I know, "thickness" could be any one three or four dimensions.

The one you don't show is the thickness of the flange face, i.e. A minus the thin bit. in some cases it might be B, in other cases it is the thickness of the connecting hub bit ( the thin bit).

You say "strength calculation" - strength in what plane or action, axial, bending moment, torque??? makes a big difference.

work out what and where the forces apply to this thing and then you can find the dimension.


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

 

[KevinNZ]

You need to define the context of your question. If you are calculating to a code then the code should have a definition of forging thickness.

 

[MichaelDexter]

Thanks for replies
Conext is: strength calculation for pressure vessel or pipeline flanges (acc to EN 1092-1). Calculation acc. to EN 13445-3 by Visual Vessel Design ver 10.0. There is material properties depending on forging THICKNEES - see sketch.
When I am choosing a flange for calculation, I am taking bigger thickness for safety. But maybe I should take other (lesser) value

In this program by chosing calcutaion acc to ASME VIII div 1 there is no ranges of thickness and properties
In sketch: Rm - tensile strength, Rp - min proof strength in room temp, Rpt - min proof strength in calculation temp
f_d - design stress at calc. temp, f20 - design stress at ambient temp,

http://files.engineering.com/getfil...-b310-4018bc51881c&file=2016-02-02_124958.jpg

http://files.engineering.com/getfil...-8b65-be37083683d6&file=2016-02-02_125031.jpg

For racookpe, I'm not thinking about heat treatment now
Sorry for my English, is poor