Is there a relation between pipe wall thickness and weight of fitting? 2

[46871654652]

When we want to add new valves to an existing pipe system, Do we have to consider wall thickness of the existing pipe?

My client want us to check whether the existing pipe wall thickness will able to take the weight of new valve which to be installed or not. But I only know a basic calculation for selecting pipe wall thickness; t = PD/2(SE+PY).
As the formula, we have nothing to do with weight.
I've also tried to search for the relation between pipe wall thickness and fitting weight, and found nothing.

I will appreciate if someone can clarify this point for me.

Regards.

 

[RVAmeche]

Thicker wall = more material = more mass, assuming the dimensions are the same

Whether that weight is significant or not depends

 

[LittleInch]

If the new valve is supported by the pipe then yes you need to check, but this is a stress analysis of the pipe, nothing to do with any standard or simple calculation.

Most places use a piping and stress analysis program where you input the weight of the valve and it then works out if the stress in the pipe is too high or not.

A lot will depend on where the nearest support is to the valve and the wall thickness of the pipe and any other forces or stress the pipe is under.

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

 

[curtis2004]

Hi there,

Usually, you either install your new valve close to an existing support, or install additional support, or check if pipe can support it. If you give us pipe material, size & wall, span between two supports in question & distance to valve, valve type, we can give you answer what is like needs to be done. What is flowing inside pipe and what is facility type?

Thanks,
Curtis

 

[fel3]

You should be able to find weights for pipe, valves, fittings, etc. in manufacturers' and vendors' online catalogs and tables. If you can't find what you need there, you can contact them directly for the information. Some online catalogs are easy to navigate and others are not, so sometimes it can be difficult to find the information you need. But, it IS there....somewhere.

==========
"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill

 

[46871654652]

I think I've got my answer.
Thank you for all of your answers.

 

[KevinNZ]

You will also need to check the pipe supporting structure. Adding a valve will a lot of extra gravity and seismic load to nearby pipe supports. Thin wall pipe will also need the local stresses at the pipe shoe checked.

 

[GD2]

If you can support the valve from the bottom to take the weight of the valve, you will minimize the effect of the piping in terms of adding additional stress to the piping system.

You didn't say anything about the size. The size matters.

GDD
Canada