Buttweld Elbow
What is a Buttweld Elbow?
A Buttweld Elbow is a critical pipe fitting used to change the direction of flow in a piping system—typically at 45° or 90° angles. Welded directly to the pipe, it offers a smooth, permanent, and leak-proof transition, ensuring optimal flow with minimal turbulence or pressure drop.
Buttweld elbows are widely used in oil & gas refineries, petrochemical plants, water treatment systems, power generation, and marine pipelines, and are available in long radius (LR) and short radius (SR) designs based on flow and space requirements.
Key Features
- Directional Flow Control – Facilitates precise flow changes in pipelines.
- Multiple Angles & Radius – Offered in 45° and 90°, with LR and SR options.
- Seamless Welds – Ensures strong, pressure-tight joints.
- Smooth Bore – Minimizes erosion and reduces flow resistance.
- Standards Compliant – Manufactured to ASME B16.9, DIN, EN, and MSS-SP norms.
Types of Buttweld Elbows
- 90° Long Radius Elbow
- 90° Short Radius Elbow
- 45° Elbow
- 180° Return Bend (on request)
- Reducing Elbow (custom)
Specifications
Mechanical Properties
Chemical Composition
Equivalent Grades
Weight Chart
Specifications
| Parameter | Details |
|---|---|
| Sizes | ½" to 48" (DN15 – DN1200) |
| Radius Types | Long Radius (1.5D), Short Radius (1D) |
| Wall Thickness | SCH 10 to SCH XXS |
| Material Options | CS, SS 304/316, Alloy Steel, Duplex |
| Standards | ASME B16.9, MSS-SP-43, DIN 2605 |
| Manufacturing | Seamless or Welded, Hot Formed / Cold Formed |
| Property | Typical Value |
|---|---|
| Tensile Strength | 485 – 750 MPa |
| Yield Strength | 205 – 450 MPa |
| Elongation | ≥ 20% |
| Hardness | 120 – 250 HB |
| Temperature Range | -46°C to +650°C |
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 – 0.35 |
| Manganese (Mn) | 0.60 – 1.65 |
| Silicon (Si) | 0.15 – 0.80 |
| Chromium (Cr) | 16.0 – 20.0 |
| Nickel (Ni) | 8.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Iron (Fe) | Balance |
| Standard | Equivalent Grades |
|---|---|
| ASTM | A234 WPB (CS), A403 WP304/316 (SS) |
| ASME | B16.9, B16.28 |
| MSS-SP | SP-43, SP-75 |
| DIN | 2605 |
| EN | EN 10253 |
| Elbow Type | Size (inches) | Weight per 100 pcs (kg) |
|---|---|---|
| 90° LR Elbow | 2" | 125 |
| 90° SR Elbow | 2" | 110 |
| 45° LR Elbow | 4" | 210 |
| Reducing Elbow | 6" x 4" | 250 |
Applications of Buttweld Elbows
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What’s the difference between a long radius and short radius elbow?
Long radius (LR) elbows have a smoother bend for better flow; short radius (SR) elbows are more compact but create more turbulence.
Are elbows available in custom radius or angles?
Yes. We manufacture elbows in custom angles and radii as per project specifications.
What type of welding is used for buttweld elbows?
TIG or MIG welding is typically used to join elbows to pipes for seamless installation.
Can elbows be used in food-grade systems?
Yes. When made from SS 304/316L with polished interiors, elbows are suitable for food & pharma use.
