Steel Flanges
The full domestic flange line. ASME B16.5 catalog through 24 inch, B16.47 Series A and B large diameter, API 6A pipeline pressure, AWWA C207 waterworks, DIN EN 1092-1 metric, and custom plate-cut to 203 inch.
Flange Types in Stock
Standards We Stock
ASME B16.5
Pipe flanges and flanged fittings, 1/2 inch through 24 inch NPS. Class 150, 300, 400, 600, 900, 1500, and 2500. Raised face, flat face, ring-type joint, and tongue-and-groove facings.
ASME B16.47
Large diameter flanges, 26 inch through 60 inch NPS. Series A (derived from MSS SP-44, heavier pattern, 150# and up) and Series B (derived from API 605, lighter pattern, 75# and up, not generally available above Class 600). Series A and B are not interchangeable.
API 6A / 6BX
Wellhead and pressure control flanges. 2000, 3000, 5000, 10000, 15000, 20000, and 25000 PSI working pressure classes. Ring-type joint facings with matching ring gaskets. PSL-3 and PSL-4 product specification levels available on procurement that demands the additional inspection and documentation those PSLs require.
AWWA C207
Steel pipe flanges for waterworks service. Class B (86 psi), Class D (175 psi), Class E (275 psi), Class F (300 psi). 4 inch through 144 inch. C207 uses a flat-face (FF) facing mated to a full-face rubber gasket; it does not share the raised-face (RF) or ring-type-joint (RTJ) facings used on the ASME B16.5 line above, and C207 flanges are not directly interchangeable with raised-face hardware. Plate-cut construction from A36 or A516-70 with AIS-compliant domestic melt available.
DIN EN 1092-1
European metric flanges. PN 6, 10, 16, 25, 40, 63, 100, 160, 250, 320, and 400 pressure ratings. DN 10 through DN 4000. Type 01 (plate), Type 11 (weld neck), Type 02 (loose), and others.
Materials
Domestic-melt heat lots available across the carbon, stainless, and alloy grade spectrum. See Materials for the full grade table.
- Carbon: A105, A350 LF2, A350 LF3, A516-70, A36, A694 F42 through F70
- Stainless: F304, F304L, F316, F316L, F321, F347, dual-certified
- Chrome-moly: F11, F22, F91, F92
- Duplex and super duplex: 2205, 2507
- Nickel: Inconel 625, Hastelloy C-276, Monel 400
Documentation Package
Every order ships with the documentation the project requires. BAA, BABA, or AIS compliance letters, MTRs per EN 10204 3.1 or 3.2, NACE hardness reports on sour service heats, and charpy impact reports on low temperature grades. Heat lots are segregated for domestic-melt orders so the paperwork chain is unbroken.