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Thanks, actually the bolting on page 368/369, line 28, is SB-572 UNS N06002 (Hastelloy X). Table 3 in Section II Part D also lists a couple other materials (see my first thread) for temperatures at or above 1500 F. So are you suggesting that I must stick to those published materials in Table...

Hello I am looking for a little technical advise regarding a high temperature bolting application. This applies to both bolting on vessels (ASME BPV VIII-1) and process piping (ASME B31.3). The design temperatures in the areas for concern are in the range of 1200 F to 1500 F with an internal...

Thanks for the info RCHandy. Procedure 2-10 covers the code calculations for the minimum required bolt load and throws on the addition delta F (decreasing compression force in gasket) to Hp. The total tightening force required to seal the joint is the greater of Wm2 or Hp + F. In the case...

I know this topic has been discussed on the forums previously, but in all the instances I looked at this question was never answered: Is there a reliable method to determine proper bolt torque when designing an appendix 2 flange? I know the rules of thumb are to use a predetermined bolt...

Thanks for you input TGS4. Based on 5.5.3, the fatigue will not be a concern. I prefer to use "Design by Rules", however this does not mean that I should just turn my brain off and follow blindly. All I am suggesting is just because it is written in the code doesn't necessarily mean that it...

Thanks Prex for your response. For those interested, I used a static analysis with a fine mesh around the opening. I did not model the threads, just a 0.84" thru hole in the shell (conservative). On the hole inner surface I applied the equivalent horizontal thrust load (pressure X hole area)...

Hi Guys I am curious if there is anything additional to note when following the ASME Section VIII Div. 1 and/or 2 rules for threaded openings. I have a high pressure vessel that I am designing (4000 psi and 400F) and wish to use threaded connections in the shell, c/w a seal weld. UG-36(3)(b)...