ANSI B16.5 Reducing Flange

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Reducing Pipe Flange Suppliers | ASME/ANSI B16.5, B16.47 Series A & B, B16.48

A reducing flange is a type of flange designed to connect pipes or fittings of different sizes. It features two different diameter openings: one side has a larger bore, while the other side has a smaller bore. This allows the flange to facilitate a transition between two pipes or components with different sizes, making it a critical part of systems that require a size reduction in fluid or gas flow. The design of reducing flanges allows for a secure, leak-proof connection while accommodating different pipe sizes. It is available in both slip-on and weld-neck designs, with the choice depending on the application’s pressure and temperature requirements. Reducing flanges are manufactured to meet various industry standards, such as ASME B16.5, DIN, and ANSI, ensuring compatibility and reliable performance.

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Reducing Flange

ANSI reducing flange, Pipe reducing flange, Flange reducing adapter, Reducing slip-on flange, Weld neck reducing flange, Stainless steel, Carbon steel reducing flange, High-pressure reducing flange, Custom reducing flange, Flange reducers, Reducing flange fitting, Flange reducer coupling

ANSI B16.5 Reducing pipe flange Specifications

SIZE RANGE

15mm (1/2" NPS ) up to 600mm ( 24" NPS ), For 2500# in sizes from NPS 1/2 to NPS 12

STANDARDS / DIMENSION

ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN

PRESSURE CLASS

150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64.

FLANGE FACE TYPE

FF—Flat Face, RF—Raised Face, FM—Female Face, M—Male Face, T—Tongue Face, G—Groove Face, RJ—Ring Joint.

CARBON STEEL

ASTM A105/A105N (SA105N), LTCS A350 LF2, A694

DUPLEX & SUPER DUPLEX

ASTM A182 / ASME SA182 - S31803, S32205, 2205, S32750, S32760, S32950, 2507.

STAINLESS STEEL

ASTM A182 F304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 321H, 310, 310S, 347, 904L, etc.

ALLOY STEEL

ASTM A182 / SA182 - F1 / F5 / F9 / F11 / F12 / F22 / F91

MTC

EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103

Flanges ANSI/ASME B16.5 & B16.47
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Materials

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Stainless Steel ➜ Carbon Steel ➜ Alloy Steel ➜
Reducing Flange Diagram

ASME B16.5 REDUCING FLANGE - DIMENSIONS & WEIGHT

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Nominal Size Type Ø A D Liner Thickness
DN1 DN2
In. In. mm mm mm
3/4" 1/2" 1 98.5 30 5.0
1" 1/2" 1 108 30 5.0
1" 3/4" 1 108 30 5.0
1.1/2" 1/2" 1 127 30 5.0
1.1/2" 3/4" 1 127 30 5.0
1.1/2" 1" 1 127 30 5.0
2" 1/2" 3 152 30 5.0
2" 3/4" 2 152 30 5.0
2" 1" 2 152 30 5.0
2" 1.1/2" 1 152 30 5.0
3" 3/4" 3 190.5 35 5.0
3" 1" 3 190.5 35 5.0
3" 1.1/2" 2 190.5 35 5.0
3" 2" 1 190.5 35 5.0
4" 3/4" 3 228.6 35 5.0
6" 3/4" 3 280 40 5.0
6" 1" 3 280 40 5.0
6" 1.1/2" 3 280 40 5.0
6" 2" 3 280 40 5.0
6" 3" 3 280 40 5.0
6" 4" 2 280 40 5.0
8" 1" 3 343 35 5.0
8" 1.1/2" 3 343 35 5.0
8" 2" 3 343 40 5.0
8" 3" 3 343 40 5.0
8" 4" 3 343 40 5.0
8" 6" 2 343 40 5.0
10" 1" 3 406 35 2.5
10" 1.1/2" 3 406 35 2.5
10" 2" 3 406 35 2.5
10" 3" 3 406 35 2.5
10" 4" 3 406 35 2.5
10" 6" 3 406 35 2.5
10" 8" 2 406 35 3.5
12" 1" 3 483 35 3.5
12" 1.1/2" 3 483 35 3.5
12" 2" 3 483 35 3.5
12" 3" 3 483 35 3.5
12" 4" 3 483 35 3.5
12" 6" 3 483 35 3.5
12" 8" 3 483 35 3.5
12" 10" 2 483 35 3.5
14" 12" 1 533 40 3.5
16" 12" 3 597 40 3.5
16" 14" 2 597 35 3.5

ANSI Reducing Flange Standards

Reducing Flange Standards are established to ensure compatibility, reliability, and safety when using reducing flanges in piping systems. These standards govern dimensions, materials, pressure ratings, and manufacturing tolerances for various types of reducing flanges.

1. ASME/ANSI Standards (American)

  • ASME B16.5– Pipe Flanges and Flanged Fittings (NPS 1/2" to 24").
  • ASME B16.47 – Large Diameter Steel Flanges (Series A & B, NPS 26" to 60").
  • ASME B16.36 – Orifice Flanges.
  • ASME B16.48 – Line Blanks (Spectacle, Spade, and Spacer Flanges).
  • ANSI B16.1 – Cast Iron Flanges and Flanged Fittings.
  • ANSI B16.42 – Ductile Iron Pipe Flanges and Flanged Fittings.

2. ISO Standards (International)

  • ISO 7005-1 – Steel Flanges for General Applications.
  • ISO 7005-2 – Cast Iron Flanges.
  • ISO 7005-3 – Copper Alloy Flanges.

3. EN Standards (European)

  • EN 1092-1 – Steel Flanges.
  • EN 1092-2 – Cast Iron Flanges.
  • EN 1092-3 – Copper Alloy Flanges.
  • EN 1092-4 – Aluminium Alloy Flanges.

4. DIN Standards (German)

  • DIN 2527 – Blind Flanges.
  • DIN 2576 – Slip-On Flanges (PN 10).
  • DIN 2633 – Weld Neck Flanges (PN 16).
  • DIN 2634 – Weld Neck Flanges (PN 25).
  • DIN 2635 – Weld Neck Flanges (PN 40).

5. JIS Standards (Japanese)

  • JIS B2220 – Steel Pipe Flanges.

6. GOST Standards (Russian)

  • GOST 12820 – Flat Flanges for Steel Pipe Joints.
  • GOST 12821 – Steel Welded Flanges for High-Pressure Applications.
  • GOST 33259 – Flange Connections for Industrial Equipment and Pipelines.

7. BS Standards (British)

  • BS 4504 – Circular Flanges for Pipes, Valves, and Fittings.
  • BS 10 – Specification for Flanges and Bolting.

8. API Standards (Oil & Gas)

  • API 6A – Wellhead and Christmas Tree Equipment Flanges.
  • API 605 – Large-Diameter Carbon Steel Flanges (merged into ASME B16.47 Series B).

9. AWWA Standards (Waterworks)

  • AWWA C207 – Steel Ring Flanges for Waterworks Service.

10. MSS Standards (Manufacturer's Standardization Society)

  • MSS SP-44 – Steel Pipe Flanges (merged into ASME B16.47 Series A).
  • MSS SP-51 – Flanges for Glass-Lined Equipment.

11. Material-Specific Standards (ASTM)

  • ASTM A105 – Carbon Steel Forged Flanges.
  • ASTM A182 – Alloy and Stainless Steel Forged Flanges.
  • ASTM A350 – Carbon and Low-Alloy Steel Flanges for Low-Temperature Service.
  • ASTM A694 – High-Strength Carbon and Alloy Steel Flanges for High-Pressure Applications.

12. Other Regional and Specialized Standards

  • KS B1511 – Korean Standard Flanges.
  • NF E29-206 – French Standard Flanges.
  • SANS 1123 – South African Standard for Steel Flanges.

WHY Arrow Piping Solutions For Pipe reducing flange!

Arrow Piping Solutions competitive pricing, on-time delivery, and exceptional after-sales support, making it the preferred choice for high-quality Reducing Flanges worldwide.

Quality Assurance

Arrow Piping Solutions offers high-quality pipe reducing flanges that meet international standards such as ASME, ANSI, and DIN, ensuring superior performance in every application.

Customization

Arrow Piping Solutions provides customized reducing flanges to meet specific project requirements, offering a wide range of sizes, materials, and pressure ratings.

Durability

Made from premium materials like stainless steel, carbon steel, and alloy steel, Arrow Piping Solutions' reducing flanges are designed for durability and resistance to corrosion, pressure, and temperature fluctuations

Expert Support

The team at Arrow Piping Solutions provides expert guidance and support, assisting in selecting the right reducing flange for each application, ensuring efficiency and reliability.

Can reducing flanges be custom-made?

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Yes, reducing flanges can be customized to meet specific project requirements, including size, material, and pressure ratings. Customization ensures compatibility with unique piping systems.

What is the difference between a reducing flange and a standard flange?

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The main difference is that a reducing flange has two different-sized openings to connect pipes of varying diameters, while a standard flange has the same size openings on both sides for connecting pipes of equal size.

Are reducing flanges available in different pressure classes?

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Yes, reducing flanges are available in a range of pressure classes, typically from 150 lbs to 2500 lbs, based on the specific needs of the application and the piping system.

AVAILABLE TYPES OF FLANGES

TONGUE AND GROOVE FLANGES

MALE AND FEMALE FLANGES

WELD NECK FLANGES

BLIND FLANGES

Orifice Flange

Socket Weld Flange / SWRF Flange