Bolt selection for different rating in one spec

Sorry i still dont agree or may be dont understand how you will achieve this.....u mind showing an example of one boltspec from which you can correctly get bolt lengths as mentioned below....remeber all these flanges will be in one piping spec

waiting to hear back from you....

Rat FL-DN Bolt-Dia FL-Th1 FL-Th2 GT Nut1 Nut2 xtra-len Std-Bolt-Length
150   15   1/2"   11.5   11.5   3.2   10   10 ??  60
300   15   1/2"   14.5   14.5   3.2   10   10 ??  75
600   15   1/2"   21.5   21.5   3.2   10   10 ??  80

Cheers

Sorry i still dont agree or may be dont understand how you will achieve this.....u mind showing an example of one boltspec from which you can correctly get bolt lengths as mentioned below....remeber all these flanges will be in one piping spec

waiting to hear back from you....

Rat FL-DN Bolt-Dia FL-Th1 FL-Th2 GT Nut1 Nut2 xtra-len Std-Bolt-Length
150   15   1/2"   11.5   11.5   3.2   10   10 ??  60
300   15   1/2"   14.5   14.5   3.2   10   10 ??  75
600   15   1/2"   21.5   21.5   3.2   10   10 ??  80

Cheers