In CMAA 74, paragraph 3.3.2.4.2 states:
The localized stresses due to local bending effects imposed by wheel loads calculated at points 0 and 1 are to be combined with the stresses due to the Case 2 loading specified in paragraph 3.3.2.3.2 of this specification.
However, it does not explicitly...
Thank-you. That was my thinking, as well as my off-the-cuff response to an off-the-cuff question.
I am just taking a proactive approach to the common response "Where does it say this in the code? Prove it". Some people just don't seem to accept the notion that the codes are not design...
Are there any ASME restrictions on installing an expansion bellows (or even metal/flex hosing) after the pressure relief valve, on a Sec I - 900 psi boiler?
I don't have access to "Basics of Boiler and HRSG Design book", so here is another shot in the dusk, from ABB's "Combustion Fossil Power".
http://files.engineering.com/getfile.aspx?folder=314e2bc5-88fe-4c78-870b-050606eb9b2f&file=HRSG2.jpg
Something like the attached?
(more a picture than a drawing, but it's a shot)http://files.engineering.com/getfile.aspx?folder=c9980928-d68d-4cda-8a3a-d64a4f7bf600&file=HRSG.jpg
You can get "nice" diagrams from here (for a price)
http://www.chemicalogic.com/mollier/default.htm
or were you thinking of less extravagant, for free?
If a local library archive does not have the volume you are looking for, the best and easiest is to request the article from the Linda Hall Library:
http://www.lindahall.org/services/document_delivery/
I have used their document service a number of times. IT IS GREAT. They have access to A...
StevenHPerry, yes I was a little too quick with my reponse - I was thinking of pressurized CO2/propane containers, and now I am confused because, as you pointed out 330F is not even above the boiling point of olive oil at 1 atm .............. my brain is all fuddled now ........ coffee time :)
Boo1 - if I am reading your statement correctly "Thermal growth change in the cylinder reduces volume" - that is not correct. The cylinder diameters (both ID & OD) INCREASE - so the volume will increase.
The easiest (if the information is available) answer is - the pressure inside the cylinder...
The "pressure rating" is also highly dependant on temperature (and to reiterate, Schedule & Grade as well) - metal strength decreases at higher temperatures (you may also want to look at brittle fracture if low temperatures are involved).
The correct way to get a piping "pressure rating" is to...
