Spec-Driven Fitting Insertion

The spec-driven fitting insertion feature allows you to insert standard assembly fittings into a pipeline. Use the fitting insertion feature to:

• Define and insert standard assembly fittings into a pipeline. A standard assembly fitting is a group of fittings that represent a standard vent or drain assembly. You do not need to create a large number of assemblies and their configurations in the fitting library before insertion.

• Modify the orientation of a member fitting without changing other instances of the same assembly fitting.

• Insert a fitting at a free port, with one port of the fitting being mated with the free port.

◦ A port of an equipment nozzle that is not connected with any pipe or fitting

◦ A port of a fitting that is not connected with any pipe or fitting, and the fitting is inserted at a free port.

• Insert a fitting of a specification other than the pipe specification at the insertion location. For example, you can insert a B3A Gate Valve on a A3A pipeline.

During fitting insertion, Spec-Driven Piping allows you to insert a fitting of a specification that is different from the selected pipe specification. This overrides the specification of the selected fitting.

You can also override specifications when you insert group fittings. In this case, use the specification override feature individually for each fitting in the group. The specifications of the fitting that you insert by overriding specification are not affected by pipeline propagation during pipeline modification, reducer fitting insertion, or specification break.

Spec-Driven Piping uses the SPECIFICATION string parameter to store the specification of a fitting. The specification of the fitting with the overridden specification remains unchanged when the pipeline or pipe segment specification changes during pipeline propagation.

The specification of a fitting is the same as specification of the pipe segment on which you have inserted it as long as you do not override the fitting specification.

The following figure shows a pipe segment with a specification A3A. If you do not override the specification, you can only insert a fitting of specification A3A.

If you click the Specification check box in the Insert Fitting dialog box, you can insert a fitting of a specification, B3A. The specifications of the upstream and the downstream pipes and fittings do not change when you insert the fitting of specification B3A as shown in the following figure.