Pressure rating

[TeaTime]

Bit of a strange one...

How do I find out the pressure rating of a copper washer?

 

[Agile]

Metal in compression is very strong. But copper is a softer metal comparatively than steel for example.

It would all depends on the size.

So if your copper washer was say 30 mm diameter and 2 mm thick then I would guess that it could take a safe load of perhaps 10 tons before deforming significantly.

Odd question though!

Tony

 

[TeaTime]

Thanks Tony,

I know that a copper washer will be able to withstand pretty much all applications for a household pressures, I am looking to use one at about 10,000 psi so that's why I ask.

I know it's an odd question.

I'm just seeing if it is suitable for using it on a sealing face for a 1/2" BSPP gauge connection

 

[Gasguru]

Have you considered using Dowty bonded seals instead?

 

[TeaTime]

I have found some dowty washers that are capable of withstanding the pressure I need, but I am just trying to find out if I can get it in copper washers as I have seen them used on 5000 psi pressure tests in the past.

Thanks GG

 

[Agile]

Its not a field that I have much experience of.

But welding gas joints normally use a metal to metal union seal!

Tony

 

[TeaTime]

Agreed Tony, unfortunately NPT cannot be used in this instance.

Basically I work with guys who don't always replace the dowty washers, because it's not always obvious when they have been used. With a copper washer, you can tell it has been compressed.

I just thought I'd ask on the off chance someone had some experience with this. Thanks for the input so far.

TT