Reducing Flange

Need a dependable flange? Reducing Flange on MetalMitra comes in all standard face types and pressure classes, ready for reliable pipe-to-pipe and pipe-to-equipment joints.

Reducing Flanges provide a practical solution for size transitions in piping systems while maintaining a bolted flange connection. They are available in different dimensions, pressure classes, face types and materials according to project and application requirements.

Products can be manufactured or supplied according to approved drawings and project specifications.

Reducing Flanges are used in selected applications where a flanged connection between different pipe sizes is required. Industries include oil & gas, petrochemical, chemical processing, refinery, power generation, marine, sugar, nuclear, defence and industrial fabrication.

Performance highlights

• Size Transition — Designed to connect piping components with different nominal diameters.
• Compact Design — Combines flange connection and size reduction in a single component.
• Multiple Pressure Classes — Available in specified ASME pressure classes and DIN ratings.
• Wide Material Range — Stainless, carbon, alloy, duplex, nickel and copper alloy options.

Reducing Flanges Specifications

Dimensions — ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges and custom dimensions.

Standards — ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA and custom drawings.

Pressure Class — 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS and 2500 LBS.

DIN Ratings — ND-6, ND-10, ND-16, ND-25 and ND-40.

Size Range — 1/2″ (15 NB) to 48″ (1200 NB).

Flange Face — Flat Face (FF), Raised Face (RF) and Ring Type Joint (RTJ).

Applicable Standards

DIN Standards — DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 and DIN 2673.

ANSI / ASME Standards — ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36 and ANSI B16.48.

BS Standards — BS 4504, BS 1560 and BS 10.

Flange Face Types

Flat Face — FF — Flat-face configuration for applications requiring a flat mating surface.

Raised Face — RF — Raised-face configuration commonly specified for industrial pressure piping systems.

Ring Type Joint — RTJ — Ring-type joint configuration for specified high-integrity sealing applications.

Materials & Grades

Stainless Steel Reducing Flanges — ASTM A182 / A240 F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H and 904L.

Duplex & Super Duplex Steel — ASTM / ASME A/SA 182 F44, F45, F51, F53, F55, F60 and F61.

Alloy Steel — ASTM / ASME A/SA 182 & A387 F1, F5, F9, F11, F12, F22 and F91.

Carbon Steel — ASTM / ASME A/SA 105, A350, A181 LF2, A516 Gr.70, A36, A694 F42, F46, F52, F60, F65 and F706.

Nickel Alloys — Nickel 200/201, Monel 400/500, Inconel 600/601/625/800/825, Hastelloy C276 and Alloy 20.

Copper Alloys — Cu-Ni 90/10, Cu-Ni 70/30 and selected copper alloy UNS grades.

Detailed Material Selection

Reducing Flange Design

Different Bore Sizes — Designed with different flange and bore dimensions to accommodate specified pipe size transitions.

Integrated Reduction — Provides a compact method of transitioning between different nominal pipe diameters within a flanged connection.

Precision Machining — Machined surfaces, bore geometry and flange dimensions are produced according to the specified standard or approved drawing.

Typical applications

• Oil & Gas
• Petrochemical Plants
• Chemical Processing
• Power Generation
• Refineries
• Marine Industry
• Sugar Industry
• Nuclear Applications
• Defence
• Process Piping
• Industrial Fabrication
• Pressure Piping

Quality checks & certification

Every lot of Reducing Flange sourced through MetalMitra can be inspected and documented to the governing standard and your purchase order.

• Dimensional inspection
• Flange face and bore inspection
• Material identification and traceability
• Visual and surface inspection
• Material Test Certificate documentation
• Heat number traceability where specified
• Third-party inspection support as required
• Custom drawings and technical documentation

Why buy through MetalMitra

• Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
• One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
• Full traceability — Heat numbers, EN 10204 3.1 MTCs and third-party inspection on request.
• Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.

Ready to buy?

Send your size, grade, quantity and delivery location for Reducing Flange, and matching suppliers on MetalMitra will come back with offers.

Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the mill test certificate.