6.1.4. Pipe-run<br>

### 6.1.4. Pipe-run

Pipe-run in the graphical editor is exactly the same as a pipe-run in the entire package. It is a section of the system of constant calculation flow rate. You can place fittings and “miscellaneous fittings” (not shown on drawing) on it. A pair of pipe-runs exists only as long as the pipe-run is being drawn; after it is completed the pair breaks down into two pipe-runs.

A pipe-run may consist of many segments. Points within a pipe-run are depicted in the form of diamonds, whereas terminal points are shown as squares.

Button on the “Central” toolbar: , or, a pair of pipe-runs:

Appearance on screen (colours: supply = red, return = blue):

“Pipe-run” component data:

Pipe-run number

Numerical field. Unique symbol assigned automatically to a pipe-run. May be changed by the user. Numbers of supply and return pipe-runs are identical. The system is numbered in the order from the source to terminal units. When a pipe-run is connected to a preceding pipe-run without branching, then it have the same number followed by subsequent letters: _a, _b, _c, etc.

Every check of connections or launching of calculations cause automatic renumbering of the pipe-runs. User-specified pipe-run numbers remain unchanged, and become the starting point of a new numbering sequence (if, for instance, you assign number 40 to a pipe-run that follows pipe-run no. 23, then the following pipe-runs will be assigned numbers 41, 42, 43, etc.).

You can take advantage of this option when numbering risers or pipe-runs of apartment systems. When you assign defined numbers to riser segments or systems (e.g. 1000, 2000), then all pipe-runs within the given riser or system will have subsequent numbers assigned: 1001, 1002 or 2001, 2002, etc.

Length [m]

Numerical field. May be determined by the application – in this case it is shown enclosed in brackets. If the user enters the length, the application abandons length determination for that pipe-run. You can revert to automatic length determination by entering “?”.

Pipe type

Selection field. You can select it from the list opened by clicking the button on the right side of the field or enter it directly using a letter shortcut.

Location

Selection field. Location of the pipe-run in the system being designed. Name in brackets indicates the default name. You can change it by selecting a name from list. To revert to automatic determination enter “?”. The location of a component in the system is important in relation to calculation options, where various diameter sizing options may be defined for various locations. The entire system is divided into radiator circuit pipes, apartment system, risers and network (distribution to risers).

Connection cat. and type

Selection field. Catalogue and, if necessary, type of pipe fittings used to make junctions (tees) and connections. The default setting is “ As pipe-run catalogue”. The field does not apply to elbows, the type of which is specified in the field below.

Bend type

Selection field. Type of component accounted for in calculations for every elbow shown in drawing. You can select it from a catalogue or enter it using a letter shortcut. Default setting: “(size)”.

Miscellaneous fittings

Compound field. Other fittings not shown on diagram. Select from catalogue and you can use a macro.

Ambient temperature [oC]

Numerical field. Temperature of the pipe-run environment. Default value (in brackets) is taken from general data.

Insulation [mm]

Selection field. You can select insulation type from catalogues loaded into the project. Thickness may be specified or determined automatically. The (default) value indicates that insulation type for the pipe-run is taken from general data.

Component status

Selection field. Select from list the current status of component: existing or under design.

Elevation [m]

Numerical field. Determined by the application (value in brackets) or specified by the user. You can revert to automatic determination by entering “?”.

Gains in room

Selection field. You can specify the room in which heat gains from the given pipe-run are to be accounted for. By default the room is selected automatically.

Line style

Selection field. Select from list the appearance of the pipe-run or configure it – component appearance window is opened.

After placing a valve or other fitting component on a pipe-run, its list of properties (data) is supplemented with properties of the component inserted.