OFST flat oval requirements

This topic describes the specification requirements for flat oval offset (OFST) components.

Parameter description requirements

• Parameter #1 = Width of arrive

• Parameter #2 = Height of arrive

  Note:
  Where the Arrive and Leave are different sizes, additional parameters are required. Normally the Width and Height parameters can be used for both Arrive and Leave sizes.

Data set requirements

For information about data set requirements that apply for all flat oval components, refer to Flat oval component requirements.

The following requirements are in addition to the data references that are created for parameters.

** Where the Default value is set to a parameter, the Expression value must be set to the same parameter. This is applicable for all component types.

P-point requirements

For information about P-point requirements that apply for all flat oval components, refer to Flat oval component requirements.

P-point P2 is PTMI type because it is offset from the Z axis.

The following table shows the additional required P-points:

The P-points are arranged as shown in the following graphic:

Specification requirements

The following specification headings are required:

• Type (TYPE)

• Duct Shape (PSHA)

• Duct Width (PWID)

• Duct Height (PHEI)

Specific Type (STYP) is also used in AVEVA supplied flat oval specifications to differentiate between vertical and flat (horizontal) offsets.