Recent content by KevinNZ

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.

See B31.1 clause 104.3.1 (d) (1) (-e)

I implemented RTJ lap flanges. Custom made from two WN flanges to allow rotation in the site assembly.

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.

B31.3 appendix S has an example of support lift off

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

Agree. Would delete the post if a could.

https://www.bestarpipe.com/newsdetail/application-and-characteristics-of-dn165-galvanized-steel-pipe.html

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.

The problem might with the pipe not the flange. Hard to make DN500 Sch 20 seamless pipe with constant thickness.

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...