Pipe Data Table

Catalogues and Specifications User Guide

Additional Tools : Pipework : Pipe Data Table

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

Each Pipe Data Table will own 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.

To create a Pipe Data Table the user must first create or navigate to a Table World element (TABWLD) and then select Create > Spec Table > Pipe Data Table from the main menu bar to display the Create Pipe Data Table window.

Enter the Name to be assigned to the new Pipe Data Table and set the Purpose to PIPE.

Click OK to create a Pipe Data Table in the database hierarchy and display the Pipe Data Table window.

Nominal Bores

The user must select a list of bore sizes to match those in the specification from the Available Nominal Bores list.

Click Add to populate the Nominal Bores column. To add the complete Bore list 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.

After setting the required bores the user must complete the three data columns.


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

Wall Thickness Ref

The Wall Thickness Reference column is a link to a set of wall thickness tables.

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 will be considered as requiring extra material. If a flange requires an allowance then the value will be taken from the Pipe Data Table and put into the ALLOW attribute of the flange and the LOOSE attribute will be 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

To do this the user must navigate to a specification in the explorer and then select Modify > Specification from the main menu to display the Modify Specification window.

To set the Pipe Data reference, select the CAD View radio button and then click Show CAD Atts. The Modify Specification window will now display the Cad Attributes.

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

the search panel is displayed.

Clicking Find will then search for all PDTAB elements and displays them in a list.

To set the reference, select a table and the 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.