Light weight ball valve thickness 2

[sunilsk]

hello,
i have one query,our compnay wants to develop a light weight non standard SS 304 ball valve for particular pressure rating.for this project we want to make a non standard valve so we can reduce weight for light purposes. but for thickness point of view all the given ASME, BESN OR ISO standard provide excess thickness than our target weight. i want to know is there any calculations or literature from design book anywhere or standard which provide optimum thickness for particular pressure rating.
P.s:-our company does not have facility to simulate finite element analysis of ball valve design.

 

[LittleInch]

None I'm aware of. If you want something none standard, so I assume you mean a specific pressure between a "standard" set of pressure ratings then you're on your own.

Either get someone else to FEA it or build a few and test them to destruction, then apply a FoS of at least 2.

Note that valves exist within systems so unless there is an open end not attached to anything, you need to simulate bending, torsion and axial force that the valve may be subjected to in service and still work.

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

 

[Nick_Gray_88]

You can use the ASME codes to set a value of pressure and temperature and design the valve from material properties based off that.

I’d suggest looking at API 6A, from memory I believe it goes on a similar route? In clause 4.3.3.1 and 4.3.3.2 of the 20th Ed.
But make sure you add safety factors in as required to be safe.

 

[HitokiriAoshi]

ASME Section VIII Pressure Vessel Calculations can be used. but honestly, should use ASME B16.34 as the thinnest thickness, or else you probably won't meet whatever code.

Also, safety factor and defect in material should all be taken into consideration.

not to mention, the thinner a valve is, the more sensitive to pressure/temperature it is. which means your FAT probably would be meaningless at operating temperature. unless you are proofing your design with a comprehensive validation testing at temperature/pressure.

Luke | Valve Hax |

https://valvehax.com/