regarding bltlength of same spec and same dia of blt and different number of bolts

i explained my problem detail,

in my 900# spec for 4"and 6" dia flanges have the bolts 8-1.125 and 12-1.125  bolt dia of both flanges is same.
according to new bolt method  
for  thickness of 4"  flange +gasket+flange = 110.06   (stud boltlength requiree= 190)  xtalength= 79.94
for 6"   flang+gasket+flange =  128.06                      (studboltlegth required= 215)   xtralength= 86.94

when we are calcilate and give the xtra length  in SBOLE- 1.125   79.94 for 4" stud bolt length is ok but 6" studbolt length we get wrong (210 only).

any body knows the solution please tell me its urgent.

i explained my problem detail,

in my 900# spec for 4"and 6" dia flanges have the bolts 8-1.125 and 12-1.125  bolt dia of both flanges is same.
according to new bolt method  
for  thickness of 4"  flange +gasket+flange = 110.06   (stud boltlength requiree= 190)  xtalength= 79.94
for 6"   flang+gasket+flange =  128.06                      (studboltlegth required= 215)   xtralength= 86.94

when we are calcilate and give the xtra length  in SBOLE- 1.125   79.94 for 4" stud bolt length is ok but 6" studbolt length we get wrong (210 only).

any body knows the solution please tell me its urgent.