Be careful with this video: studs are not mentioned.
I've never used bolts on pressure vessels; I use studs.
There are many examples using bolts on block flanges (Figure UG-34 (p), Figure UG-40 (a-1), (a-2)): INCORRECT
Some photo?
More info: dimensions, amount of misalignment............?
Where was the welding supervisor? .......
Is he a qualified welder?.Did the welder perform the repair without consulting anyone?
@ (OP)
On your drawing, DP = 274 MPa.
On your publication, DP = 247 MPa (35,825 psi).
Both DP values are incorrect based on the thickness of your drawing.
You say, "ASME VIII does not provide stud flange calculations.". Incorrect.
Joints assembled with strong, long bolts are MORE FLEXIBLE than those assembled with short bolts, and two-flange joints are more flexible than single-flange joints. A more flexible joint will withstand more abuse, such as differential thermal expansion loads. Stronger bolts also permit higher...
I'll show you the way to learn how to assemble bolts.
If you don't put in the effort to understand the basic principles, I can't do any more for you.
You need to study further to understand it without help.
I don't care what you think of me.
@ A8yssUK
If you are a flange gasket expert, then why not read ASME PCC-1 2022?.The answer is here.
You said: “Also, the bolting friction factor at 500°C is irrelevant, as you are torquing at room temp.”
The lubricant is present at 500 C, did you consider that corrosion could occur?
Control of the bolt stress is possible by means inherent in the procedure especially if effective thread lubricants are employed, but in all cases the bolt stress can be regulated within reasonable tolerances by measuring the bolt elongation.
You need to read more, over and over again. Or take...
@XL83NL
I already responded on Sunday at 7:32 PM.
You're too comfortable and don't read ASME PCC-1.
If you don't understand it, I can't do anything else.
@ Trestala
It's obvious you have no experience in manufacturing or inspection.
.I'm sure you've never prepared an inspection plan or performed pressure tests, leak tests, or other tests.
Hence, your comment is ridiculous.
And......what is your help to the (OP)?
