ASME Section 1 Steam Drum Nozzle Analysis via NozzlePRO (Section VIII Div 2)?
ASME Section 1 Steam Drum Nozzle Analysis via NozzlePRO (Section VIII Div 2)?
(OP)
I'm working on a project where the vendor of an existing HRSG (BPVC Section 1) will not provide stated nozzle allowables for their steam drum connections. Instead they've provided the nozzle fabrication details (nozzle/shell materials, thickneses, repads, etc) for us to perform our own calculations. My question, can I utilize NozzlePRO software for these evaluations, considering they are performing calculations per BVPC Section VIII Div 2? I can't find specific reference in Section 1 allowing use of the Section VIII Div 2 calculations, but also cannot find reference for how to evaluate the loadings on these nozzles. Thoughts?





RE: ASME Section 1 Steam Drum Nozzle Analysis via NozzlePRO (Section VIII Div 2)?
If you are replacing the nozzle in kind the NBIC would consider it a repair.
Hope this helps.
RE: ASME Section 1 Steam Drum Nozzle Analysis via NozzlePRO (Section VIII Div 2)?
RE: ASME Section 1 Steam Drum Nozzle Analysis via NozzlePRO (Section VIII Div 2)?
RE: ASME Section 1 Steam Drum Nozzle Analysis via NozzlePRO (Section VIII Div 2)?
RE: ASME Section 1 Steam Drum Nozzle Analysis via NozzlePRO (Section VIII Div 2)?
Section I also states that your can only use alternate methods only if Section I does not have formulas to cover the design. (PG16.1)
RE: ASME Section 1 Steam Drum Nozzle Analysis via NozzlePRO (Section VIII Div 2)?
1. Satisfy the area replacement requirements of PG-33 to validate the pressure design and comply with the Code rules
2. Analyze the stresses in the vessel in the nozzle using another technique. Typically this is done through using WRC 107/WRC 297 or using FEA (such as NozzlePRO). Since there are no rules on how to evaluate the stresses in the shell and nozzle due to external loads in the Code, this is acceptable per PG-16.1. Typically the calculated stresses are compared to the Sec. VIII-2 elastic criteria using the allowable stresses from the original Code.
The intent of this is not to design the nozzle using NozzlePRO, it is to validate the design with consideration for external loads, which are not accounted for in the Code equations.
RE: ASME Section 1 Steam Drum Nozzle Analysis via NozzlePRO (Section VIII Div 2)?