Buttweld Reducer
What is a Buttweld Reducer?
A Buttweld Reducer is a pipe fitting used to join two pipes of different diameters, ensuring a smooth transition in diameter and maintaining flow integrity in a pipeline. It helps in avoiding turbulence and pressure loss, making it essential for flow control and volume regulation.
Reducers are available in two main types: Concentric Reducers, which align the centerlines of both pipes, and Eccentric Reducers, which offset the centerlines to prevent air accumulation in horizontal pipe runs.
Key Features
Leak-Proof
Jointing
Durable
Construction
High Pressure
Resistance
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Size | ½” to 48″ (custom sizes available) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300, 600, 900, 1500, 2500 |
| PN Ratings | PN6, PN10, PN16, PN25, PN40, PN64 | |
| Product Types | Butt Weld Elbow | 45°, 90°, 180° |
| Material Options | Carbon Steel | ASTM A234 WPB, ASTM A420 WPL6 |
| Stainless Steel | ASTM A403 WP304, WP316, WP321, WP347 | |
| Alloy Steel | ASTM A234 WP5, WP9, WP11, WP22 | |
| Other Alloys | Monel, Inconel, Titanium | |
| Standards & Certifications | ASTM | ASTM A234, ASTM A403 |
| ASME / ANSI | ASME B16.9, ANSI B16.9 | |
| MSS | MSS SP-75, MSS SP-43 | |
| European Standards | EN 10253-1, EN 10222 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, CE Marked | |
| Design Features | Wall Thickness | Schedule 40, Schedule 80, Schedule 160 |
| End Connections | Butt Weld Ends | |
| Pressure Class | 2000#, 3000#, 6000#, 9000# | |
| Tolerance | Dimensional Tolerance | As per ASME B16.9 / B16.28 |
| Coating & Surface Finish | Anti-Corrosion Coating | Passivation, Epoxy Coating, Zinc Plated |
| Surface Finish | Mill Finish, Polished, Pickled, Bead Blasted | |
| Testing & Inspection | Pressure Testing | Hydrostatic, Pneumatic |
| Non-Destructive Testing | Radiography (RT), Ultrasonic (UT), Dye Penetrant (DPT), Magnetic Particle (MPI) | |
| Destructive Testing | Tensile, Hardness, Impact, Flattening |
Dimensions
| Fitting Type | Nominal Size (NPS) | Outside Diameter (OD) | Wall Thickness (Schedule) | Length (L) | Weight per Piece |
|---|---|---|---|---|---|
| Butt Weld Reducer (Concentric) | ½” × ¼” | 21.3 × 13.5 mm | Schedule 40, 80 | 50 mm | 200g |
| Butt Weld Reducer (Concentric) | ¾” × ½” | 26.7 × 21.3 mm | Schedule 40, 80 | 60 mm | 300g |
| Butt Weld Reducer (Concentric) | 1″ × ¾” | 33.4 × 26.7 mm | Schedule 40, 80 | 70 mm | 450g |
| Butt Weld Reducer (Concentric) | 1½” × 1″ | 48.3 × 33.4 mm | Schedule 40, 80 | 85 mm | 600g |
| Butt Weld Reducer (Concentric) | 2″ × 1½” | 60.3 × 48.3 mm | Schedule 40, 80 | 100 mm | 800g |
| Butt Weld Reducer (Concentric) | 2½” × 2″ | 73.0 × 60.3 mm | Schedule 40, 80 | 120 mm | 1.2kg |
| Butt Weld Reducer (Concentric) | 3″ × 2½” | 88.9 × 73.0 mm | Schedule 40, 80 | 140 mm | 1.5kg |
| Butt Weld Reducer (Concentric) | 4″ × 3″ | 114.3 × 88.9 mm | Schedule 40, 80 | 160 mm | 2.0kg |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (Carbon Steel, Stainless Steel, Alloy Steel) |
| Yield Strength | 170 – 450 | MPa |
| Hardness | 120 – 200 | HB (Brinell) |
| Elongation | ≥ 20 – 30 | % |
| Density | 7.8 – 8.0 | g/cm³ (Carbon Steel), 7.9 – 8.0 g/cm³ (Stainless Steel) |
| Impact Toughness | ≥ 27 – 70 | J (Charpy, grade-dependent) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 250 – 450 | MPa |
| Corrosion Resistance | Good to Excellent (SS > CS > Alloy Steel) | – |
| Thermal Conductivity | 15 – 50 | W/m·K |
| Coefficient of Thermal Expansion | 11 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 120 – 200 | HB |
| Surface Finish | Mill Finish, Pickled, Polished, Bead Blasted | – |
| Welding Type | Butt Weld Ends | – |
| Operating Temperature Range | -46 to 600 | °C (material-dependent) |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 | ASME B16.9 / B16.28 |
Chemical Composition
| Element | SS 304 | SS 304L | SS 316 | SS 316L |
|---|---|---|---|---|
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| Carbon (C) | ≤ 0.08 | ≤ 0.03 | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
Applications of Buttweld Reducer
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What is the difference between concentric and eccentric reducers?
Can reducers be fabricated in custom thicknesses?
Are reducers available in seamless and welded forms?
What certifications are available?
