Oil & Gas · Flange Engineering Reference

Landee / ASME B16.5 Flange Calculator

NPS and Pressure Class are the primary selectors. The calculator now loads dimensional data instead of displaying “Reference table required” for the standard flange fields. Select flange type, facing, schedule and material to generate the complete reference record.

NPS / Nominal Size

Pressure Class

Flange Type

Facing

Pipe Schedule / Bore

Material

Unit

Data basis: Standard flange dimensions are keyed by NPS + Class. Landee publishes ASME B16.5 product tables with the same dimensional fields (OD, flange thickness, hub dimensions, bore, bolt circle, bolt holes and bolting); the dimensional backbone below is cross-checked against published ASME B16.5 reference tables. Manufacturer-specific bore/finish details can vary with schedule and product configuration, so the selected basis is shown in the result.

Dynamic Engineering Diagram

Complete Reference Table

Every standard NPS/Class combination available in the ASME B16.5 range. Class 900 starts at NPS 3; Class 2500 ends at NPS 12.

NPS	DN	Class	Type	Facing	Schedule	Material	OD	Thickness	WN Bore	SO Bore	PCD	Bolts	Bolt Hole Ø	RF Ø	RF Height	Hub Base Ø	Hub Top Ø	WN LTH	SO LTH	Basis

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