Bolt Length Calculation for Standard Flange-Gasket-Flange

The calculation of bolts will be triggered by the presence of a connection type starting with F (flange face) or L (lap joint), and will be completed by a second occurrence of such a connection type.

The calculation steps are:

 

How Bolts are Selected from the Specification

The steps in selecting a bolt from the Specification are as follows:

1. For each bolt in the set, get the BTYP values for each end of the bolt:Set the bolt item code from the bolt SPCOM name, and the bolt description from its detail and material texts.
   • If they are both set to BOLT, select the default bolt for that bolt diameter.
   • If they match and are not set to BOLT, select the bolt with that BTYP.

 

Bolt Selection from Specification

Each SBOLT element in the catalogue is referenced by an SPCOM in the Bolt Specification. Bolts are selected individually for each BLTP from the Specification for the appropriate Bolt Diameter and Bolt Type (BTYP). Examples of valid BTYPs are:

MACH	machine bolts
STU	stud bolts
CAP	cap screws
JACK	jacking screws
TAP	tapped holes