Does anyone know any suppliers of fully welded (as opposed to 3 piece or top entry) 900# large diameter (36" - 42") ball valves?
The application is main line valves on a natural gas pipeline (i.e. buried). I know Cameron offer them, but was looking for other possible vendors.
Does anyone have a reference for for an SIF on a taper (i.e. the taper for butt welding 2 different wall thickness pipes together)?
I am aware that the actual girth weld has an SIF of 1 in B31.3, but was wondering how much of an effect the taper has on stress intensification.
I am trying to determine an appropriate temperature margin to account for drift in the ductile-brittle-transition-temperature due to pressure vessel age.
I have used API RP 579 to determine the minimum allowable temperature for the vessel thicknesses / materials but want to add a margin to...
I would like your thoughts on how to model a ship impact on an over water pipeline. I want to determine the force and displacement required to rupture the pipe (i.e. the work). I was thinking of a non-linear analysis but am unsure of how to determine at what point a leak would begin. Any ideas?
Does anyone have a typical stress-strain curve for ASTM A53 Gr.B carbon steel pipe? If not, something similar?
I would like it for a non-linear FEA model.
If the branch and header are different schedules are the following weldolets ok;
Std WT header, XS branch - buy XS weldolet
XS header, Std WT branch - buy XS weldolet (will have step down to branch pipe WT). If step unacceptable for flow reasons, request weldolet bore be machined down to match...
I am using a large spreadsheet that has one input value and returns one calculated value. I want to input a series of values (say 1 to 50) into a cell and get the calculated result for each value. How can I do this without typing each input value into the cell individually? The spreadsheet is...
