List of variables

Variables

Variable 9 - Tube pitch (crosswise)

Distance of tube center to tube center of two adjacent tubes in one row

Variable 10 - Tube pitch (lengthwise)

Distance between two tube rows in flow direction

Variable 11 – Number of tube-side passes

Number of tube-side passes
1	2	3	4	6	8

Type 0	Type 1	Type 10	Type 2	Type 4	Type 6

			Type 3	Type 5	Type 7

			Type 8

Variable 49 – Bundle type

Number of tube-side passes
1	2	3	4	6	8

Type 0	Type 1	Type 10	Type 2	Type 4	Type 6

			Type 3	Type 5	Type 7

			Type 8

Variable 52 – Baffle cut

Ratio of the segment opening height to shell inside diameter in percent

Baffle cut should be 15% to 40% of inside diameter of shell

Variable 58 - Design ->D or Rating/Simulation->R

In Design mode the number of tubes is given and the shell diameter is calculated.

In Rating / Simulation mode the shell diameter is given and the number of tubes is calculated.

Variable 83 – Mean distance of boundary tubes to bundle centre

This value is required for the mechanical calculation of tubesheets of partially tubed U tube heat exchangers and floating head heat exchangers according to AD 2000 Merkblatt B5.

Variable 86 – Minimum bundle-to-shell clearance

Minimum distance between the outer tube in the tube-sheet and the shell. This distance is not underrun when the tube sheet is created. This value can be overwritten in the input mask at any time.

Variable 109 – Tube pitch

Variable 123 – Total area enclosed by perimeter

This value is required for the mechanical calculation of tubesheets according to ASME BPVC Section VIII Div. 1 chapter UHX.

Variable 124 – Perimeter of tube layout

Perimeter of the tube layout measured stepwise in increments of one tube pitch from center-to-center of the outermost tubes. The figure shows the application to typical triangular and square tube patterns.