Flanges from round stock?

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Our fabrication standards prohibit making flanges for valves or pipe fitting from round stock?

What is the difference between flanges from plate, or milled from stock?

What about cutting slices from round stock that arises concerns in making flanges?

 

[MikeHalloran]

Round stock can have hidden flaws, most likely in the direction of rolling. They would become radial-ish defects in a slice of round.

Plate can also have hidden flaws, again most likely in the direction of rolling. They would become interlaminar gaps within a flange, parallel to the faces. ... possibly weakening the flange a bit less than would a radial flaw.



Mike Halloran
Pembroke Pines, FL, USA

 

[blacksmith37]

Depends on the specification; ASTM reworked a few flange specs years ago,to prohibit the practice, when users had problems with flanges cut from plate. Most ASTM specs now only permit plate for blind flanges.

 

[jbeckhou]

what type of flanges ASTM or API?

Petrotrim Services

http://www.petrotrim.com

 

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Navsea (Navy Flanges)

 

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MIL-STD-777

https://assist.daps.dla.mil/docimag...essionid=5c30e1d2debf215aef8634683e113c494154