xtra of stud

For a stud bolt,  is  the xtra value used for overall extra length of the stud or is just the extra lenght of one threaded end?

Can someone explain?

Thanks.

Extra is for overall length ie. it is added once per bolt.

Extra is for overall length ie. it is added once per bolt.

Thank you, Pitch. That helps.

Extra is for overall length ie. it is added once per bolt.

Pitch,

I used XTRA for overall length.

For one pipe line, I got 16 bolts with calculated length 80.17mm and 8 bolts with calculated length 77.79mm.

The Nstd Blength are (25mm 32mm 38mm 44mm 51mm 57mm 64mm 70mm  76mm 83mm 89mm 95mm 102mm 108mm 114mm 121mm 127mm 133mm 140mm 146mm 152mm 159mm 165mm 171mm 178mm ).

When I used this NSTD, I got 24 bolts with length 83mm. but when I run PDMS bolt report to double check, it shows 24 bolts with length 80mm.

My question is that, instead of using NSTD of each SBOL, is ISODRAFT using its own built-in length table? or where I am worng?

Thank you much!

I would have expected 83mm.

The rule is supposed to be calculated length within +1mm of entry in length table go to lower figure. So 80.17mm = 83mm
Lebgth greater than +1mm go to next higher entry  So 77.79mm = 83mm