Skillet blind thickness for an air test

[Brad Mudd]

I am going to air test some gas distribution piping. The test pressure is between 90-100psi, I am planning on using a skillet blind between 2-12” 600 series flanges. What thickness of plate would be required?

 

[KevinNZ]

There should be a formula in the piping code for blinds/spades.

 

[GBTorpenhow]

Class 600 flanges for 100 psi?

See ASME B16.48 for line blank thicknesses for the various ASME pressure classes.

 

[LittleInch]

Also what on earth are "600 series" flanges?? or "Skillet blind" for that matter. Do you just mean a blind flange or a spade?

Could be anything, but if you mean class 600 flanges to ASME B 16.5 then yes, use ASME B 16.48 as noted above.

But please be a bit more precise - that's what design engineers do.

If you're trying to use some home made flat plate then you need to do a design analysis to ASME VIII or similar. Note at 100 psi this plate has a force of 5 tonnes being exerted on it so no 3mm thick piece of "steel" please....

 

[NovaStark]

I am going to air test some gas distribution piping. The test pressure is between 90-100psi, I am planning on using a skillet blind between 2-12” 600 series flanges. What thickness of plate would be required?

Best to start with the code of construction for the system. If B31.1/3 or ASME VIII, there are formulas for design.

 

[cat.smith]

Class 600 flanges for 100 psi?

See ASME B16.48 for line blank thicknesses for the various ASME pressure classes.

Agree. Good design basis if this skillet was field fabricated for a block-n-bleed to check for flange leaks.

 

[TGS4]

The standards are definitely a good place to start. You could also take an approach such as shown in this paper.