Selection of Section I paragraphs from different parts
Selection of Section I paragraphs from different parts
(OP)
When using ASME B&PV Section I, some topics are not in Part General, but in one of the specific parts like PFT (firetube boilers) or PWT (watertube boilers). For example:
(*) external pressure is covered by Part PFT (PFT-50 covers some rules for cylinders (tubes) under external pressure). When I'm designing a watertube boiler, how are the external pressure calculations covered? It seems strange to me that I need to decide myself to apply a paragraph that is not in part PG or PWT while designing a watertube boiler.
(*) attachment of tubesheets is covered by PFT-11. When I have a tubesheet in a watertube boiler, how should I analyze the tubesheet attachment. There is no reference in Part PG or PWT to PFT-11.
Am I missing something. I'm experienced in the analysis of pressure vessels conform Section VIII. With this experience, it is hard to understand what should be in your Section I analysis as explained by the above examples.
Thanks for comments and response.





RE: Selection of Section I paragraphs from different parts
RE: Selection of Section I paragraphs from different parts
TS's: the TS on WT and TS on FT are completely different; and yes there are rules for TS's of WT in the WT and PG sections. good luck. GenBlr
RE: Selection of Section I paragraphs from different parts
I'm now in the phase of studying the design calculations for boilers in general, without having a specific design.
Coming from generic Pressure Vessel design, it takes some time to get acquainted with boiler specifics. However, thinking it over somewhat more, I now see that it is not possible to have external pressure on components of a WT.
RE: Selection of Section I paragraphs from different parts
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN