Orientate Slope

The addition of offtol attributes to catalogue ppoints means that certain components can have a connection whose direction is allowed to be offset within the limits of the offtol angle. Only one ppoint may have an offtol set. When a ppoint has an offtol set, a new attribute NOMDIR can be used to set the intended arrive/leave direction of the component.

NOMDIR is the equivalent to the use of zero length bends to generate a small angle in a joint and is meant to replace the use of zero length bends where possible.

In practice the main use of zero length bends is with tee components where vertical branches are required from a sloping line. Other possibilities for offsets include flanges where it might be a requirement to offset slightly from a horizontal flange to obtain a fall.

The supplied catalogues provided by AVEVA contain examples of offset ppoints on P3 of tees and the leave of flanges. For the purposes of this user guide, the use of offset ppoints including sloping flanges is described.

As the Slope Ref is set at pipe level, all the branches created below it will automatically use the same Slope Ref set at pipe level. You can set an alternative Slope Ref from the Slope Ref drop-down list.

You must now set the slope of a component’s leave tube by specifying the required rate of fall or slope angle. Applies only to a component which involves a change of direction (such as an elbow). As a result, the Slope window is only displayed where an offset can be applied, for example, the component has an offset on the ppoint.

From the main menu bar, select Orientate > Component > Slope, the Slope window is displayed:

By default the currently selected element is named in the Slope window along with its current direction, current slope attributes and direction of flow.

To change the CE, in the Design Explorer, select the required element from the design database, then click CE.

To apply the current slope to the leave direction of the CE, click Slope. Alternatively you can type the required direction into the New Direction field.

Use Form Values

If the branch has not had a slope reference set, the Slope pane of the Slope window is populated with slope attributes and Use Form Values is selected.

By default the slope of 1/100 and angle 0.5729 is displayed, this will be the slope applied to the branch, but you can modify the slope applied to the branch using the Fall, Angle and Direction functionality available from the Slope window.

You can set the slope of the branch as a rate of fall or as an angle, click Fall or Angle input the rate of fall or angle of the pipe.

You is required to choose the direction of the slope from the Slope drop-down list.

Select Against Flow to place the system into backwards mode.

Or

Select With Flow to place the system into forwards mode.

Select Slope, the slope the new direction is displayed in the New Direction field.

To set the direction, click Apply to change the slope, Reset to discard any inputs or Dismiss to close the Slope window.

The new direction is now set by setting the NOMDIR attribute of the flange. NOMDIR is now the leave direction of the flange.

Use Branch Slope

If the branch has a slope reference set, Use Branch Slope is selected and the Fall or Angle attributes are displayed as the slope reference and are unavailable for modification.

You are required to choose the direction of the slope from the Slope drop-down list.

Select Against Flow to place the system into backwards mode. Or select With Flow to place the system into forwards mode.

Select Slope, the slope the new direction is displayed in the New Direction field.

To set the direction, click Apply to change the slope, Reset to discard any inputs or Dismiss to close the Slope window.

The new direction is now set by setting the NOMDIR attribute of the flange. NOMDIR is now the leave direction of the flange.