Holes for circuits in tube sheets 1

[spike]

We use rectangular tube sheets for use in pressure vessels. The sheet thickness ranges from 1/2 inch to 1 inch. There are numerous holes in the plate for passage of the circuit tubes. Hole diameters range from 3/4 inch to 1.05 inches.Are there any specific tolerances that we can use for these holes that are covered in the ASME code? Or can we set up our own tolerances.

 

[TGS4]

What design Code do you use for these pressure vessels?

 

[spike]

The Code we use is Section VIII Boiler/Pressure Code.

 

[codeeng]

Sounds like these could be air cooler header boxes in which case you can refer API 661 Table 12 for tube hole tolerances. Standard fit for 3/4" tubes is 0.76" +0.0, -0.004" and for 1" tubes is 1.012" +0.0, - 0.004"