Dear Sir,
We have already procured a steam turbine and its existing piping is being checked by piping specialist using CAESAR II. The loads on suction nozzle connection and combined resultants (i.e. Limit 3) are not passed as per code NEMA SM 23.
I just want to get some sort of help or any engineering opinion to get the piping loadings and its impact reduced on suction nozzles according to the standard.
One idea is to make all support’s friction factor reduced by using Teflon or any other material that reduces the friction factor between the pipe and structure, because adapting above technique the turbine nozzle loadings as per NEMA SM 23 is within the limits.
I also want to confirm above engineering technique is viable in steam turbine piping or not recommended?
Appreciate your relevant help in above context.
Best regards,
Ali
Hi, Ali, I confront same problems that you have right now.
1.First step you must get clear statement from Steam Turbine vendor about exact location of "resolution point". The resolution point become one of important factor for NEMA analysis
2. Try to reduce the Force and moment by adding flexibility in your pipe routing. May be adding elbow.
3. Try to reduce Force and moment by adding Spring Support. Spring support can minimize significantly enough..
4. Adding stopper or guide
well I hope this tips can help you enough..
cheers,
Waskito