Our Products
ANSI, API, and AWWA pipe flanges in over 50 material grades. Stock and custom sizes from 1/2" through 60". Complete dimension tables, CAD drawings, and engineering reference tools.
Product Catalog
Flange Types
We carry a complete range of flange types for petrochemical, oilfield, waterworks, and general industrial applications.
Weld Neck Flanges
Long tapered hub for high-pressure, high-temperature service. Gradual transition reduces stress concentration at the base of the flange.
Slip On Flanges
Slides over the pipe and is welded both inside and outside. Easy to align and cost-effective for low-to-moderate pressure applications.
Blind Flanges
Used to close the ends of piping systems and pressure vessel openings. Must withstand significant mechanical loading and hydrostatic pressure.
Socket Weld Flanges
Features a socket bore to insert the pipe before fillet welding. Best for small-diameter, high-pressure piping where radiographic exam is not required.
Threaded Flanges
Joined by screwing onto the pipe thread without welding. Suited for low-pressure, non-critical services where welding is impractical.
Lap Joint Flanges
Used with a stub end for systems needing frequent dismantling. Allows easy bolt-hole alignment and is common in lined and clad piping.
Engineering Reference
Flange Dimensions & Weights
Complete dimension tables covering ASME, ANSI, API, and AWWA standards. Select a standard below to view pressure-class-specific dimension and weight data.
ANSI B16.5 Forged Flanges
NPS 1/2 through 24, Classes 150 to 2500. The workhorse standard for forged steel flanges.
Classes: 150, 300, 400, 600, 900, 1500, 2500
View DimensionsANSI B16.47 Series A
NPS 26 through 60, MSS SP-44 heavier series for large-diameter piping.
Classes: 75, 150, 300, 400, 600, 900
View DimensionsANSI B16.47 Series B
NPS 26 through 60, API 605 lighter series for large-diameter piping.
Classes: 75, 150, 300, 400, 600, 900
View DimensionsANSI B16.1 Cast Iron
Class 125 and 250 cast iron pipe flanges and flanged fittings.
Classes: 125, 250
View DimensionsAWWA C207 Waterworks
Steel pipe flanges for waterworks service, Class B through F.
Classes: B, D, E, F
View DimensionsOrifice Union B16.36
Orifice flanges for flow measurement applications.
Classes: 300, 400, 600, 900, 1500, 2500
View DimensionsSpecialty Flanges
Intermediate Connection
Reducing and nozzle connection flanges
Long Weld Neck
Extended hub flanges per MSS SP-97
Spectacle Blinds
Figure-8 blinds, spades, and spacer rings
Studding Outlet
Self-reinforcing branch connections
Engineering Tools & Charts
Bolt Chart
Bolt sizes, quantities, and stud lengths by class
Bore Chart
Standard bore dimensions by pipe size and schedule
Weight Chart
Approximate flange weights by type and class
Wall Thickness
Minimum thickness values by class
RTJ Face Dimensions
Ring groove specifications and tolerances
Alternate Facings
RF, FF, RTJ, T&G, M&F configurations
API Slide Rule
API 6A pressure-temperature ratings
Download Center
CAD/3D Flange Drawings
Browse and download professional CAD files in PDF, DXF, DWG, STEP, IGES, 3DXML, CATDrawing, and CATPart formats. Filter by size, class, type, and facing.
Inventory
Materials We Stock
Over 50 material grades across carbon steel, stainless steel, alloy steel, and high-performance nickel alloys.
A105, A350 LF2, A694 F52/F60/F65
304/304L, 316/316L, 321, 347
F5, F9, F11, F22, F91
F51, F53, F55, F60
F5, F9, F11, F22, F91, F92
Inconel, Monel, Hastelloy, Incoloy
Availability
Pressure Classes
Stock flanges across the full range of ANSI and API pressure ratings.
