I agree with ilovechickens
While piping codes do allow for flexibility analyses the moments due to the ambient to normal operating temperature range, this can be big problem if the maximum/design temperature is higher.
Say the operating temperature is 100C and the max the line could get...
Use the same procedure you would use for structural flange design but with pressure flange dimensions. Should be lower costs to buy a pressure flange compared to making a custom structural flange.
You could be conversate and use the flange calculations for sealing as the structural limit.
98% sulfuric acid is OK to work with until you add some water. Then you could need some very exotic materials. We have applications that require Tantalum pipe spools at the point water is added. You do need to define the pH range of your acid.
Hi All
Does anyone work with EN 1993-1-9 and how does assessment of fatigue differ from ASME VII please?
Would to know if the design effort/time will change and if the FEM tools used for ASME VIII work with EN 1993.
Two phase safety valve and disk sizing is covered by ISO4126-10, but this come back using two phase flow calculations for the pressure upstream and downstream of the disk/valve
The part of CC2901/UG44 that includes consideration of the material is PR, flange pressure rating. The lower the value of Pr the lower the allowable loads on the flange.
To be clear R6155 meant check the design of the nozzle reinforcing (and allowable nozzle loads) The designer would have used the excess wall thickness of the pipe over tm when calculating the reinforcing required.
We never use treaded pipe connections above DN50 (2") for our plant piping (steam and hot water) but our well drilling buddies use API threads for say DN300 (12") and 100bar, but they do have a $40m drilling rig to apply the required torque.
Piping codes do limit the use of threaded...
For an anchor you can use two pipe clamps and the tighten clamps to the support structure. But clamps can (and do) slip under axial loads. There should be a fixed/welded line stop incorporated into the pipe clamps.
Pipe clamps are a poor detail for large pipes and/or high loads.
There will...
You do not need know the reducer wall thickness. The piping model uses the thickness of the connected pipe. The model also applied an SIF to the connected points. The reducer SIF only uses the slope of the reducer tapper and does not use the wall thickness.
Pump Nozzle loads are limited to stop external forces acting on the pump base and effecting the motor/pump alignment. The allowable forces limits are not there to limit the stress in the nozzle steel.
As above, if the bellow's tie rods are not engaged then the pressure force does act...
The required thickness for buttweld fitting is enough so if the fitting is welded to seamless pipe the pipe would always burst first.
An XS reducer should have weld prep for XS pipe on each and thicker wall in the middle. The small end may be even thicker since the reducer is formed but...
This what happens when no leakage damage is not reported. Shuts down the country.
https://www.nzherald.co.nz/nz/airport-fuel-crisis-kauri-log-digger-damaged-oil-pipeline/2273YUR7NHWCO45P4FDSRP3DNU/#google_vignette
Update, the plant owner is going to;
Use a crane.
Add lifting lugs to the discharge tubes. Custom design to allow stops to be fitted without reaching up
Add threaded tapings to the holders for eye bolts
