SAR Engineering Works
Engineering Tools/Pipe Tools

Flange Dimensions Lookup

Fast ASME B16.5 flange dimensions for common sizes and classes.

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Flange Dimensions Lookup working drawing
Flange Dimensions Lookup — geometry

Flange Dimensions Lookup

Fast ASME B16.5 flange dimensions for common sizes and classes.

pipe toolsStable

Input console

Tuned defaults are preloaded. Edit only the dimensions you know; results refresh automatically when the inputs are valid.

About this calculator

Use case

Confirm flange bolt pattern details before field install.

NPS and pressure class lookup with bolt-circle and hole details.

Range notes

Select imperial for inches or metric for millimeters.

Current table supports common NPS 2/4/6/8 with classes 150/300.

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