Flange Finder — EN 1092-1 PN6 to PN40 and ASME B16.5 Class 150/300 by DN, Pressure Rating and Type (Weld Neck, Slip-On, Blind, Plate)

Flange Finder

Flanges are matched by nominal size (DN / NPS), pressure rating (PN6, PN10, PN16, PN25, PN40 to EN 1092-1; Class 150, 300, 600 to ASME B16.5), type (type 01 plate/slip-on, type 05 blind, type 11 weld neck, type 02 loose with collar, threaded) and material (carbon steel P250GH/A105, stainless 1.4301/1.4404, A182 F304/F316). Bolt circle, bolt count and hole diameter are fixed by the standard for each DN/PN pair, so flanges of the same DN and PN from different makers mate. The finder lists the catalogue flanges by size and rating; see the linked dimension tables for bolt circles and thicknesses.

EN 1092-1 PN10 and PN16 share bolt circles up to DN150 (and PN25/PN40 up to DN50) — but gasket faces and thicknesses differ. ASME Class 150 and EN PN16 flanges do NOT interchange except by coincidence at a few sizes. Always quote DN, PN/Class, type and material.

Coverage: 243 of 243 catalogue rows with a readable size are listed (279 rows in these categories in total; the remainder can be found through the site search by part number).

PN10

PN16

PN25

PN40

PN6

Part numbers and designations are those of the original manufacturers and are given for identification. cBallast is an independent supplier; confirm ratings against the nameplate of the installed equipment before ordering. Table generated from the cBallast catalogue on 2026-09-29.

Compiled by cBallast for identification and cross-reference. Part numbers, designations and trademarks belong to their respective manufacturers. Confirm ratings and dimensions against the manufacturer's current documentation and the nameplate of the installed equipment before ordering or installation.