Flange Lookup

Flange Lookup is an offline reference for pipe flange dimensions, bolting, facings, flanged-fitting dimensions and pressure-temperature ratings for Classes 150 through 2500, NPS 1/2 through 24. It covers the usual ASME B16.5 range and clearly marks supplemental NPS 22 entries sourced under MSS SP-44. Flange Lookup is part of the Weldbook AI family of apps from Appalachian Integrity LLC. Free access has no expiry and includes available NPS 1-1/4, 3-1/2, 5, 14 and 16 in Classes 150 and 300. A one-time Apple in-app purchase unlocks the full reference. Previous paid Apple customers keep full access without paying again; use Restore purchases if needed. No Appalachian Integrity account, ads or subscription is required. Reference content works offline after access is verified; purchases and restoration may need an Apple connection. What's inside: - Flange dimensions for Classes 150, 300, 400, 600, 900, 1500 and 2500 — outside diameter, thickness, hub dimensions, bolt-circle diameter, number and size of bolts, hole diameter, and stud or machine-bolt length, for welding-neck, slip-on, socket-weld, threaded, lap-joint and blind types. - Facings — raised-face, flat-face and ring-joint groove dimensions, plus public-source finish references with an on-screen single-source warning. - Flanged-fitting center-to-face dimensions for 90-degree and 45-degree elbows, tees, crosses, laterals, true Ys and reducers for all seven classes, 150 through 2500, each checked against two public sources; long-radius elbows for Classes 150 and 300. For Class 400 and up the numbers run to the flange edge with the 1/4-inch raised face not included, the way they are published, and the app says so on that tab. - Public-source pressure-temperature ratings for supported material groups, in both psig/deg F and bar/deg C; an on-screen CURRENT-EDITION CHECK REQUIRED warning appears where sources may lag or use a related standard, and groups with no usable table remain materials-only. - Bolting and material reference — bolt and nut specifications, material groups and gasket groups. - Reference tools — a class finder for supported rating groups, bolt/stud dimension lookup, unit converter and thread note. - Clear withheld-reference notices: this release does not publish dimensional tolerances, general flange shell-test guidance or a bolt-length calculation method; consult the governing standard and manufacturer. - A "Where these numbers came from" screen naming every source, so you can see exactly how each table was checked. Switch between inch and metric units any time. Your unit and language preferences and legal-acceptance record stay on your device. Apple supplies verified purchase entitlements. Every value in this app is reference only. Confirm every dimension, rating and other value against the current edition of the standard you are actually working to before you use it for a design, purchase, fabrication or inspection decision. Standards get revised. The app identifies the standard family and public-source lineage associated with the data; it does not certify current-edition compliance or know which edition your job calls for. This app is not affiliated with, endorsed by or licensed by ASME (the American Society of Mechanical Engineers), which publishes the standard. The standard is named only to describe what the data covers. The app does not upload your reference activity or payment details to Appalachian Integrity. Apple processes purchases and restoration. The Privacy Policy explains Apple transaction processing and any purchase or support records separately available to the developer. Built by Appalachian Integrity LLC, a Virginia inspection and engineering-documentation company, for inspectors, pipefitters, welders and engineers who need a flange number at the tailgate without pulling out a laptop.