Nozzle Check Module in ver 6.1

Posted by: Azley

Nozzle Check Module in ver 6.1 - 07/31/13 03:35 AM

Dear Sir,

We are currently using ver 6.1 for stress analysis, we had not used Ver 5.3, hence we are not aware for Ver 5.3 new addition. like "Nozzle Check".

Our nozzle axis is in "Y" direction, equipment is "X" direction, after putting the allowable as per "A","B","C",still CAESAR Nozzle Check shows only "Y" load. CAESAR not checking in X, Z direction loads-moments.

We checked the CAESAR input methods, but no detail has been given.

Can you please help to short out this problem?

IS CAESAR checking only Axial Load of Nozzle in Force-Moment in Nozzle Check Module?

Thanks in advance
Posted by: Azley

Re: Nozzle Check Module in ver 6.1 - 07/31/13 11:04 PM

Dear Richard & friends.

Please help.

Thanks
Posted by: Hardik Pilojpara

Re: Nozzle Check Module in ver 6.1 - 08/21/13 06:05 AM

my suggestion to coade,

there should be option to compare directly with user specified FX, FY, FZ, MX, MY, MZ (global cordinate system) instead of this local method only.


example i am knowing my vessel FX, FY, FZ, MX, MY, MZ, then i will set allowable in globle cordinate sytem in FX, FY, FZ, MX, MY, MZ format.

and in output nozzle it will compare--FX with allowable FX, FY with allowable Fy, FZ with allowable Fz..(just same format of restraint summary with comparision of specified allowable)

it will be useful in all equipment ( static/rotory).

Thanks
Posted by: Dave Diehl

Re: Nozzle Check Module in ver 6.1 - 08/21/13 07:50 AM

There must be a misunderstanding here - either yours or mine.

Except for the A axis, you set the coordiate scheme for the nozzle check. You set the B axis and C is A cross B. This A,B,C coordinate system is your local set.

Of course, if the pipe attached to this nozzle is in X (so that A is X) and if you define B as Y, then A,B,C is X,Y,Z - a match between local and global.

If the pipe attached to the nozzle is in Y, then A is Y. You can set B to either X or Z and then C will be the remaining direction. In this case X,Y,Z is NOT A,B,C but you should be able to see your way through.

How about this? If you really must have A,B,C match X,Y,Z, put in a very short dummy pipe in X as the "anchor" connection.

If loads are magnitudes (no signs) then I don't think you have to worry about +/- X, Y, Z either.