list of materials for valve body

[trentar]

hay there!

Does there exist a list of materials for valve body material which should be used for various fluids which flow through the valve for various process conditions (like pressure class, flow etc.)-
If yes where can I found this list!

thank you

t

 

[The Obturator]

You can find many so called 'Corrosion Charts' by various organisations. These can only be taken as a guide based on previous experience and use by users feedback over many years. Many valve companies have a chart available in their own catalogues and/or literature, but again, will always state that these are a guide as they cannot take responsibility for the fluid to be handled, its composition, % purity, temperature, mix etc., etc. Just type in 'metals corrosion chart' or 'valve materials compatibility' or similar in a search engine and you'll get a selection. Generally speaking, start with the vendors standard body material (including trim etc) and look up the suitability of the material against the intended application/fluid.

Per ISO-4126, only the term Safety Valve is used regardless of application or design.

 

[LittleInch]

The valve material needs to be compatible for the fluid inside.
The only process condition that might make a difference to which material is suitable is temperature.
Pressure and flow make no real impact on material selection.

Pressure simply affects the thickness and flow affects the size, but not the material.

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

 

[Nick_Gray_88]

Think we’re going a bit general here??
There’s a few steps really and are likely to be multiple options at the end too.
1. Fluid comparability, will the valve last 25+ years in contact with the fluid and maintain wall thickness?? If you’re using charts for a business get a published one, is better to fall back on if anything goes wrong...
2. Fluid velocity, does the velocity through the valve exceed the max. allowable for that material? Yes, you could increase valve size but unless it’s a control valve that’s very unlikely from a valve manufacturers point of view.
3. Temperature, does the material go to the design condition temperature range required?
4. Pressure, some materials are only usable on certain pressure classes, see ASME IID etc. For the restrictions on code materials; make sure you don’t exceed these.
5. Service considerations, some services prohibit certain materials or constructions like oxygen service valves; some materials go bang...
I’d imagine if you jump through all those hoops as a starter for a set of applications you’ll be pretty set??

 

[HitokiriAoshi]

you can START with API RP 615

Luke | Valve Hax |

https://valvehax.com/