Ring/Spacer minimum thickness

[Jeffrey W]

We're currently working on a 24" 316L Sch 10 line, and it appears that one of the lines coming out of the tank is half an inch too short. To avoid extensive rework, we're considering having our shop fabricate a half-inch spacer. While ASME B16.48 specifies a minimum thickness of 1.25 inches for a figure-8 blank, I'm wondering if there's another ASME standard that addresses thickness requirements for spacers or rings. Your insights on this matter would be greatly appreciated.

 

[LittleInch]

Do you need two gaskets now instead of one?

Got longer bolts?

Sketch or photo would help but is this between two flanges?

Exact distance?

Extensive rework sounds a bit strong for two cuts and reweld of a bit of pipe.

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[Jeffrey W]

Two gaskets are correct.

Longer studs are correct.

I don't have a sketch, but the space between two ASME 150# 24-inch flanges is correct.

I'm only half an inch too short.

 

[LittleInch]

Well a spacer is better than trying to weld it in.

ASME won't give you anything as this is essence a bit of pipe sandwiched between two flanges.

As this is a ring then it has no differential pressure which is what the thickness is there for, so as long at it matches the gasket thickness then althought it will forever look terrible, I can't see any reason not to do it.

But is there no spool piece somewhere in the system you can't cut a piece out and add at least 1D length plus your 1/2 "??

That's what green lengths / site measurement on any isometric allow for?
Did no one measure this properly?

Can you post a sketch or an isometric?

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