Recent content by ME231

Clarification...the modification does not involved welding. Size of the opening was increased. Thanks

When does a "U" stamp vessel become certified? Is it after the U stamp has been applied, or after the data report is submitted, or after the vessel has left manufacturing facility. We have a U stamped vessel on which one of the openings needs to be modified. Vessel has not yet left the...

Thank you both for your responses. I had a hunch but didn't quite have a good reason to disregard the excess material in the "nozzle". Now I do - Thanks again.

SnTMan, The nozzle that goes on the opening has a NPT (tapered) thread. so no welding is necessary - the pipe threads would be installed with PTFE tape. My question is, for such an unwelded construction, would extra material in the nozzle count as having reinforcing value? Thanks!

Is it permissible under code (VIII-1) to consider material (over and above the thickness required to resist pressure) in threaded (NPT) fittings as having reinforcing value? I could not conclusively decide one way or the other after reading UG-43. Thanks in advance to the forum for your feedback!

Under what circumstances would calibration of displacement channel (in tension) be necessary on tensile testing equipment?

Thanks a lot to you both for your feedbacks...

Thank you David for your response. Would you agree though that the customer is in a better position to determine the required relieving capacity than the manufacturer? Is this responsibility placed on the customer anywhere within the ASME code? Since the API is not really a "code" I would...

I have found various sources (including manufacturer's websites) that tell me how to determine relieving capacity of a burst disk given a relieving pressure and disk size. I have read articles on Coefficient of Discharge and Resistance to flow methods. However, how do I determine the REQUIRED...

Thanks Fizza453

Thanks all for your help. It seems I will need to look at alternatives to using gr 4.

But the specified min elongation requirements for Grade 4 and Grade 9 in Section II-B are the same (15%) [II-B for SB265]

Use of Titanium Grade 4 (UNS R50700) is not permitted for use in PV applications per ASME VIII-1 as it is not included on Table UNF 23.4 Any idea why? Any code cases available that permit its use at all? I have looked at a lot of places and just cannot figure out the reason it is excluded and I...

thanks a lot jamesl! wonder why there are such big differences in the safety factors for materials in Table 3 versus those in table 1A/B.

All, Is there anything within VIII-1 preventing/prohibiting use of materials from ASME II-D table 1A/1B as a bolting material if the same is not listed in table 3? Thanks in advance for your help!