Flange dimensions lookup
Quickly check common flange outside diameter, PCD, number of holes, bolt-hole diameter and bolt size.
What the lookup covers
EN 1092-1 PN16 and ASME B16.5 Class 150 bolt-circle information for common nominal sizes. The tool focuses on connection dimensions useful for identification and bolt-hole planning; flange thickness and hub dimensions vary by flange type and should be checked separately.
Quote a flangeCommon questions
What is PCD on a flange?
PCD is the pitch circle diameter: the diameter of the circle passing through the centres of the bolt holes.
Are EN 1092-1 PN16 and ASME B16.5 Class 150 flanges interchangeable?
No. Their outside diameters, PCDs, bolt-hole sizes and sealing details can differ. Always match the applicable standard.
Can I use these dimensions for fabrication?
Use the tool as a quick reference only. Verify against the latest applicable standard, approved drawing and project specification before fabrication or procurement.