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Thanks John's comments. I agree that it would be good for us to specify maximum allowable loads on the equipment. However, most equipment will be purchased by other departments or engineers even before we start to plan the piping. How could we assume the reasonable sets of forces and moments (at...

I would like to know how other stress engineers handle this kind of issues. To model piping stress, being knowledge about the flexibility and maximum allowable loads on the piping connections is very important to get a real idea of pipe stresses and if reaction forces are ok. Approaches of...

Does anyone have experience with insulating whole pipe rack instead of individul pipes on the rack? Is this good application to use on thermal oil piping about 600 deg F? Thanks for your comments.

Thanks for all your inputs. Sure, all pressure parts have to be checked. Fortunately, I am just checking the changes for a similar boiler design not retrofitting a existing boiler. Regarding to davefitz's comments: 1)The saturation enthalpy changes from 1195.6 Btu/lb to 1203.2 Btu/lb, so the...

The fuel is wood waste and there is a supplemental dust burner. Thanks,you are right. Increasing fuel feed surely will change a lot as you mentioned, even heating surface I am worried, since the heat flux may be too high. However, at this moment I want to know if the change of steam pressure...

I found that the higher pressure will reduce the circulation rate (nature circulation), so that means I have to increasing firing rate to get same boiler capacity. What else could be changed?

I have a designed boiler producing 100K LB/HR steam @150psig. Now I would like to have 300psig steam with same capacity. Does the higher pressure affect the boiler design? I knew it will change the thickness of steam drum and all the steam piping. What I want to know is if it will change the...

We are going to supply a thermal energy system like boilers, which is composed of a thermal oil heater and combustion cell, in Ontario. My question is that what is the clearance requirement from nearby gas train piping to this energy system or which standard I can find this specific requirement...

I also doubt it as it appears at the material list of vendor drawing. I could not find it in ASTM or ASME. any other ideas?

Is there someone familar to the Spec. SA-52 smls pipe? I can't find it. Thanks!

s there someone familar the Spec. SA-52 smls pipe? I can not find it. Thanks!

Thanks, It is a shame not to take care of units.

I am wondering what is the meaning of "12" in the equation of bending stress for pressure vessels. S=12M/(I/c) In the usual stress fomula, only M/(I/c). Is it safety factor? Thanks to make me clear!

In the code of CSA620.98 and CFR 49 178, there are excat definition of each direction equivalent static forces due to dynamic loadings. -horizontal accelerative force=0.35 times vertical reaction -vertical accelerative force=0.35 times vertical reaction -lateral accelerative...

The draft I draw above is the each force applied at the pedestal of vessel. All material I have found now are the case only consider the static weight loading on the two saddle for horizontal vessel. I need to know the best stress calculation method for this special case. Thanks!

^ Q/2=33137 lbf weight reaction | ^ Fv= 0.35*(Q/2)=11598 lbf saddle---||| vertical accelerative Force ||| Fa= 0.35*(Q/2)=11598 <-------| accelerative force /...

Thanks for hockchong's suggestion. Is there some zick's technical paper as you mentioned &quot; the acceleration also add more external stress to the shell (L.P.Zick analysis)&quot;? Can you give more detail information about this methods?

Thanks for arto's direction. The problem is that I know the code requirement and each of external loadings applied at the support of vessel, but I do not know if I can apply the stress calculation methods in WRC 107 to analyse this case?

Why there is nobody reply to this spread? Should I explain more detailedly? Give me an idea, please.

I am conducting the stress calc for vessels on highway truck. Is there someone know how to deal with the external loads by accelerative force applied at the support of vessel. Can I apply the WRC 297 or 107 on this case? Thanks a lot!