Pipe Data Table

Catalogues and Specifications User Guide

Piping : Pipe Data Table

Pipe Data Tables are designed to store bore specific data and are referenced by a specification. Each specification references its own specific pipe data table.

Each pipe data table owns a number of pipe data elements matching the bore sizes of the specification components. Each pipe data element has attributes to identify wall thickness, corrosion allowance and flange excess allowance and these will be accessible for each component.

The Create Pipe Data Table window is displayed with a default name based on the current element and must be created below a TABWLD element in the catalogue hierarchy. It is also an administrative element.

Many multi-purpose windows provide similar functionality through the create and modify options, the functionality is common throughout all disciplines. Refer Multi-Purpose Windows to for further information. A Pipe Data Table is added to the catalogue hierarchy and the Pipe Data Table window is displayed.

By default, the Name fields are automatically populated, the Description is Unset and the Purpose is set to PIPE, as the currently active discipline is PIPING.

Nominal Bores

Select a list of bore sizes to match those in the specification from the Available Nominal Bores list.

Click to highlight the desired bore sizes in the Available Nominal Bores (mm) list. Multiple bores can be selected at once by left clicking and dragging the mouse pointer. To remove particular highlighted entries hold down the CTRL key and left click on a bore size.

Click Add > to populate the Nominal Bores column, to add the complete bore list to the Nominal Bore column, click Add All >>.

After adding the required Bores the Remove and Remove All options become active allowing the user to remove Bores from the Nominal Bores list.

Once the nominal bores column has been populated, add values to the Wall Thickness, Corrosion Allowance and Flange Allowances columns.


Wall Thickness Ref.	A reference to an existing wall thickness table, refer to Wall Thickness Ref. for further information.
Corrosion Allowance	A numeric value to represent the corrosion allowance at that bore, refer to Corrosion Allowance for further information.
Flange Allowance	A numeric value or expression for setting extra tube lengths for flared or loose flanges, refer to Flange Allowance for further information.

Wall Thickness Ref

The Wall Thickness Reference column is used as a link to an existing wall thickness table.

Rather than enter the values for wall thickness for each size, the pipe data element for each bore size is set to reference the values of a wall thickness table which enables a standard set of tables to be created and referenced by many specifications.

Corrosion Allowance

Corrosion Allowance provides data for applications like pipe stressing or to store the value from the specification definition. A single value of corrosion allowance can be set by setting the CORRO attribute of the pipe data table. It is not necessary to enter corrosion allowance values for each bore size unless the allowance changes for different bore sizes, in which case an entry is required for each size.

Flange Allowance

The flange allowance column allows a default method of specifying the extra material required for loose flanges or extruded.

Any flange with an SCOM COMPYPE attribute set to ALLO is considered as requiring extra material. If a flange requires an allowance then the value is taken from the pipe data table and put into the ALLOW attribute of the flange and the LOOSE attribute is set to TRUE.

The flange allowance value in the pipe data table is an expression so it could be related to the wall thickness for example (10 * pwallth(1)) would give a value of 10 times the wall thickness at p1 of the flange.

Referencing the Pipe Data Table

In order to use the data within a pipe data table, the table must be referenced by a pipe specification by setting the attribute Pdareference on the specification to the name of a Pipe Data Table. For example: PDAREF /A3B.PDATAB

Use the Modify Specification window to set the pipe data reference and populate the window with the Cad Attributes.

The Pipe Data Table reference can be set in the conventional way using the search tools to find suitable tables.

By default, PDTAB automatically populates the Element Types field. Click Find to search for all PDTAB elements and displays them in a list.

To set the reference, select a table then click Use Selected. When the table name is displayed in the Pipe Data Table Ref field, click Apply.

Provision for None Standard Wall Thicknesses

The wall thickness table references provided in the pipe data tables are intended to cover the majority of cases, but in certain circumstances extra wall thicknesses will be required. If a specification has a choice of tubes with different wall thicknesses then the Pipe Data Table can only provide one value. To accommodate this, each spec component (SPCOM) has a reference to a Pipe Data Table (PDAREF) but importantly, this may reference either a Pipe Data Table or a Wall Thickness Table. The dual purpose is to allow a wall thickness to be set on a component without the need to create additional Pipe Data Tables.

To set the reference to individual components, select them from the list, select a Pipe Data Table and click Apply to set the values.