Material strength : SS316 for class 2500 valves
Material strength : SS316 for class 2500 valves
(OP)
Hello everybody.
I am a valve designer and I am facing a concern about the use of SS 316 (or other material whith the same strength) for class 2500 valves (or higher). When I use a FEA software to compute the body, I often reach stresses which overgo the 316 yield strength, for sizes bigger than 2 in.
Is it common to choose such a material for such a pressure ?
Has anybody ever faced such a problem ?
Or other materials, with higher strength, have to be advised ?
Thank you
I am a valve designer and I am facing a concern about the use of SS 316 (or other material whith the same strength) for class 2500 valves (or higher). When I use a FEA software to compute the body, I often reach stresses which overgo the 316 yield strength, for sizes bigger than 2 in.
Is it common to choose such a material for such a pressure ?
Has anybody ever faced such a problem ?
Or other materials, with higher strength, have to be advised ?
Thank you





RE: Material strength : SS316 for class 2500 valves
Typically, allowable pressures for SS flanges are lower than for other materials.
(see B16.5)
RE: Material strength : SS316 for class 2500 valves
RE: Material strength : SS316 for class 2500 valves
The other thing you will likely have to look at is increasing the wall thickness of your valves considerably if you need to continue to use 316.
Andy
RE: Material strength : SS316 for class 2500 valves
I know that I have to increase the wall thickness. It is possible radially. But in the other direction I am limited by the face to face... Perhaps have I to fix a bigger face to face.
RE: Material strength : SS316 for class 2500 valves
Andy
RE: Material strength : SS316 for class 2500 valves
RE: Material strength : SS316 for class 2500 valves
RE: Material strength : SS316 for class 2500 valves
We always verify the stress thanks to FEA. And depending on the material used, the stress can be too high... even if the minimum wall thickness is repected.
RE: Material strength : SS316 for class 2500 valves