A GA Drawing of Tube Bundle and baffles for double pass Tubular Exchanger with floating head. Drawing Program shows tags to each component.

A Drawing of Heads and Gaskets for double pass floating head. Drawing Program for Tubular Exchanger shows details at bottom and Drawing Program for Tubular Exchanger writes the notes on right.

Complete GA Drawing of Exchanger, details of saddle, Nozzles and Nozzle table. Drawing Program also writes Bill of Material for each component with reference to tag number.

The Drawing Program asks for parameters in the following dialog boxes, and based on these values and draws.

Dialog Box 1 : You can select the Foot-Inch units or Metric Units for the drawing. The system variables will be set automatically to draw in either Foot-Inch or Metric Units. All inputs will also be in selected unit system.

Dialog Box 2 : Enter designer data which will reflect in the title block of drawing. Drawing Program will automatically selects date.

Dialog Box 3 : You can select Outer Diameter of Tube. Outer Diameter is generally 19 mm, 25 mm, 32 mm or higher. Correspondingly you select Tube Pitch. Tube pitch is generally 25 mm (for 19 mm tube), 32 mm (for 25 mm tube), 40 mm (for 32 mm tube). Tube length is end to end length of tube. Tube Pitch is the distance between center lines of two tubes. Gasket width is for circular part as well as for dividing line for fixed tube sheet and floating tube sheet. Tube extension is projection length of tube outside the tube sheet (in head portion). You can select any number of tubes from 1 to 1,000. This will be extended to 2000 tubes. You can fix gasket thickness.

Dialog Box 4 : You can select either 1, 2, 4, 6 8, 10 or 12 passes on tube side.

Dialog Box 5 : You can select Tube sheet with flange or without flange.

Dialog Box 6 : Once these tube parameters are fixed, you select the tube configuration. There are 4 options. You can select either Square pitch, Triangular pitch, Rotated Square pitch or Rotated Triangular pitch. Square and Triangular pitch are normally used as these facilitates cleaning of the tube externally. Configuration for different passes is shown below.

Dialog Box 7 : If it is 1 pass exchanger you can select either Fixed head or Floating Shell. In case of fixed head and floating shell, Diameter / PCD of both tube sheets will be same.

Dialog Box 7 : You can select either Fixed head, Floating head, Floating Shell or U Tube. In case of fixed head and floating shell, Diameter / PCD of both tube sheets will be same. In case of floating head Diameter / PCD of Right (Fixed Head) tube sheet will be smaller than that one on Left (Floating Head). In U Tube there is only one tube sheet.

Tube Layout has tubes in central line in both direction. Each tube center is one pitch distance left or right. Next tube center is one pitch distance up or down.

Tube Layout has no tubes in horizontal central line, but tubes exists in vertical direction along central line. First vertical line is half pitch distance above or below centerline. Each tube in horizontal center is one pitch distance left or right. Next tube center is one pitch distance up or down.

Tube Layout has a no central line in horizontal and vertical direction. First line in horizontal and vertical direction is half pitch distance above or below / left or right of centerline. Next tube center is one pitch distance up or down.

Tube Layout has a central line in both direction. Each tube in centerline is one pitch distance x phfact left or right. First vertical centerline is one pitch x pvfact distance up or down. First horizontal centerline is half pitch distance x phfact left or right of centerline. Second centerline in vertical direction is one pitch distance x pvfact above or below.

Tube Layout has a no central line in horizontal direction, but exists in vertical direction. First line is half pitch distance + gasket width above or below centerline. Each tube center is one pitch x phfact distance left or right. Next tube center is one pitch distance x pvfact up or down.

Tube Layout has a no central line in horizontal and vertical direction. First line in horizontal direction is half pitch distance + gasket width left or right of centerline. First line in vertical direction is half pitch distance + gasket width above or below centerline. Each tube center in horizontal direction is one pitch distance x phfact left or right. Each tube centerline in vertical direction is one pitch distance x pvfact above or below.

Tube Layout has tubes in central line in both direction. First horizontal line is half pitch above center line. Each tube center is one pitch distance in vertical direction and pitch x 1.7321 in horizontal direction.

Tube Layout has no tubes in horizontal central line but has a line of tube in vertical direction. First horizontal line is half pitch above / below center line. Each tube center is one pitch + gasket width distance in vertical direction and pitch x 1.7321 in horizontal direction.

Tube Layout has no tubes in horizontal and vertical central line. First horizontal and vertical line is half pitch up/ down /above / below center line. Each tube center is one pitch + gasket width distance in vertical direction and pitch x 1.7321 in horizontal direction.

Tube Layout has tubes in central line in both direction. First horizontal line is pitch x 0.866 above center line. Each tube center is one pitch distance in horizontal direction and pitch x 0.866 in vertical direction.

Tube Layout has tubes in central line in vertical direction. First horizontal line is half pitch + gasket width above center line. Each tube center is one pitch distance in horizontal direction and pitch x 0.866 in vertical direction.

Tube Layout has no tubes in central lines in both directions. First horizontal and vertical line is half pitch + gasket width above center line. Each tube center is one pitch distance in horizontal direction and pitch x 0.866 in vertical direction.

In case of Fixed Head, you can select sizes of expansion Bellow.

In case of Floating Shell, you can select sizes of Floating Ring.