Administrative and Geographical Use of Selectors

In addition to Bolt Specific Type and Diameter, a further degree of bolt selection is allowed via the BSEL attribute of a branch member. This takes a value which can be used as the answer to a BSEL selector in the Bolt Specification. For example, if the Pipe Specification dictates that the same flange has black bolts indoors and galvanized bolts outdoors, then BSEL could be set to either IN or OUT at the flange, with entries for both bolts in the Bolt Specification. Any inconsistency in BSEL attributes between the two ends of the joint causes the system to generate an error message, output a material description of ‘‘Bolts undefined" for that joint (with zero item code, size, and quantity), and continue detailing.

A further application of this assists in the selection of isolation kits. A flange may require an isolation kit in certain duties and not others. The kit may require longer bolts to cater for isolating washers. A different flange BSEL value will cause a Bolt SPCOM to be selected which has an SBOLT that includes isolating washers in its additional items arrays.