25 and 50# pipe flange specifications - steel flange thickness

[Tmoose]

I've spent some time Googling and searching parchment in the corporate archives and this forum, and found some bolt pattern info, but have not found references to specs or standards for flange thickness for piping under 125 #/class.
Does anyone know if such things exist, and where?

thanks

Dan T

 

[ione]

In the link below some info for ANSI B16.47 flanges class # 75

http://www.rjsales.com/products/ansi_asme_flanges/b1647/75b.html

 

[11echo]

75# class is a special class for ASME Boiler Construction Code ...You can find it in a "Tube-Turn" catalog.

125# is a cast iron rating. FYI ...bolt hole dimension match 150# steel ANSI flanges

 

[JLSeagull]

Perhaps this is of interest to some for large low temp, pressure etc. in something non corrosive. And I would not be interested in industry.

 

[BigInch]

JLSeagull(Electrical) You could use it for wiring conduit!

We are more connected to everyone in the world than we've ever been before, except to the person sitting next to us. Lisa Gansky

 

[Tmoose]

"You could use it for wiring conduit! "

Well, it is electrical generation related in a far-fetched kind of way.

Coal piping for pulverized coal powerplants falls under NFPA guidelines. 50 psi design pressure is called for.

There are miles of existing flanged coal pipes serving faithfully even as we speak. Some with welded steel flanges with thickness down to 3/8".
75 and 125 class Flange thickness for pipes 8 - 26 inches diameter are going to be at least an inch thick.

When coal pipe is replaced it would be appropriate to simply upgrade to the "standardS" driven thickness, but only if 3/8" is really too thin.