# Spacing Between Pipes on a Pipe Rack

In case of pipes on a pipe rack, when flanges or flanged valves are required on two adjacent lines, it is necessary to stagger flanges as shown in following diagram, to reduce required space on pipe rack.

Minimum spacing between adjacent lines shall be decided based on O.D. of bigger size flange, O.D. of the smaller pipe, individual insulation thickness and additional 25 mm clearance.

Even if no flange is appearing on pipe in a pipe rack, spacing should be based on considering a flange in pipe.

Typical formula for spacing is as follows :

Spacing = Half OD of a flange which is larger between two pipes + Half OD of other pipe + insulation thickness of both pipes + 25 mm (or 1 Inch).

Spacing between pipes on a pipe rack.Larger spacing may be required if pipes have clamped supports. In such case, for economic reasons, clamped pipe supports at an angle of 45 degrees should be used.

Clamped pipe supports at 45 degree.

## Pipe Spacing Calculator

 Pipe 1 NPD : 1/2 Inch 3/4 Inch 1 Inch 1.5 Inch 2 Inch 3 Inch 4 Inch 6 Inch 8 Inch 10 Inch 12 Inch 14 Inch 16 Inch 18 Inch 20 Inch 24 Inch 26 Inch 28 Inch 30 Inch 32 Inch 34 Inch 36 Inch 38 Inch 40 Inch 42 Inch 44 Inch 46 Inch 48 Inch 50 Inch 52 Inch 54 Inch 56 Inch 58 Inch 60 Inch Pipe 1 Flange Rating 150# 300# 400# 600# 900# Pipe 1 Insulation Thicknes (mm) Pipe 2 NPD 1/2 Inch 3/4 Inch 1 Inch 1.5 Inch 2 Inch 3 Inch 4 Inch 6 Inch 8 Inch 10 Inch 12 Inch 14 Inch 16 Inch 18 Inch 20 Inch 24 Inch 26 Inch 28 Inch 30 Inch 32 Inch 34 Inch 36 Inch 38 Inch 40 Inch 42 Inch 44 Inch 46 Inch 48 Inch 50 Inch 52 Inch 54 Inch 56 Inch 58 Inch 60 Inch Pipe 2 Flange Rating 150# 300# 400# 600# 900# Pipe 2 Insulation Thicknes (mm) Piping Configuration Options Larger Flange Both Flanges No Flange Flange in Pipe 1 Flange in Pipe 2 Project Standard Clearance (mm)