Threaded Elbow
What is a Threaded Elbow?
A Threaded Elbow is a pipe fitting designed to change the direction of flow in a piping system, usually at angles of 90° or 45°. It connects two threaded pipe ends and eliminates the need for welding, making it ideal for quick and easy installations in low to medium-pressure piping systems.
Threaded elbows are available in NPT, BSP, BSPT, and ISO metric threads, and are manufactured from materials such as carbon steel, stainless steel, and alloy steel to suit diverse industrial environments.
Key Features
Leak-Proof
Jointing
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Size | ½” to 6″ (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 | Threaded Elbows | 90°, 45°, Street Elbows |
| Material Options | Carbon Steel | ASTM A105, ASTM A350 LF2 |
| Stainless Steel | ASTM A182 F304, F316, F321 | |
| Alloy Steel | ASTM A182 F5, F9, F11, F22 | |
| Other Alloys | Monel, Inconel, Titanium | |
| Standards & Certifications | ASTM | ASTM A105, ASTM A182 |
| ASME / ANSI | ASME B16.11, ANSI B16.11 | |
| MSS | MSS SP-79, MSS SP-83 | |
| European Standards | EN 10222, EN 10204 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, CE Marked | |
| Design Features | Wall Thickness | Schedule 40, Schedule 80, Schedule 160 |
| End Connections | Threaded (NPT, BSP, BSPT, PT) | |
| Pressure Class | 2000#, 3000#, 6000#, 9000# | |
| Tolerance | Thread Tolerance | As per ASME B1.1, ISO 7-1 |
| Coating & Surface Finish | Anti-Corrosion Coating | Zinc Plated, Hot Dip Galvanized, Stainless Steel Finish |
| Surface Finish | Mill Finish, Pickled, Polished, Bead Blasted | |
| Testing & Inspection | Pressure Testing | Hydrostatic, Pneumatic |
| Non-Destructive Testing | Radiography (RT), Ultrasonic (UT), Magnetic Particle (MPI), Dye Penetrant (DPT) | |
| Destructive Testing | Tensile, Hardness, Impact, Elongation |
Dimensions
| Fitting Type | Nominal Size (NPS) | Outside Diameter (OD) | Wall Thickness (Schedule) | Length (L) | End Connections | Weight per Piece |
|---|---|---|---|---|---|---|
| Threaded Elbow (90°) | ½” | 21.3 mm | Schedule 40, Schedule 80 | 50 mm | Threaded (NPT, BSP, BSPT, PT) | 150g |
| Threaded Elbow (90°) | ¾” | 26.7 mm | Schedule 40, Schedule 80 | 55 mm | Threaded (NPT, BSP, BSPT, PT) | 200g |
| Threaded Elbow (90°) | 1″ | 33.4 mm | Schedule 40, Schedule 80 | 60 mm | Threaded (NPT, BSP, BSPT, PT) | 300g |
| Threaded Elbow (90°) | 1½” | 48.3 mm | Schedule 40, Schedule 80 | 70 mm | Threaded (NPT, BSP, BSPT, PT) | 450g |
| Threaded Elbow (90°) | 2″ | 60.3 mm | Schedule 40, Schedule 80 | 80 mm | Threaded (NPT, BSP, BSPT, PT) | 700g |
| Threaded Elbow (90°) | 2½” | 73.0 mm | Schedule 40, Schedule 80 | 90 mm | Threaded (NPT, BSP, BSPT, PT) | 1.0kg |
| Threaded Elbow (90°) | 3″ | 88.9 mm | Schedule 40, Schedule 80 | 110 mm | Threaded (NPT, BSP, BSPT, PT) | 1.5kg |
| Threaded Elbow (90°) | 4″ | 114.3 mm | Schedule 40, Schedule 80 | 130 mm | Threaded (NPT, BSP, BSPT, PT) | 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 | Serrated / Stock / Smooth finish per ASME B16.11 | – |
| Welding Type | Threaded Connection | – |
| Operating Temperature Range | -46 to 600 | °C (material-dependent) |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 | ASME B16.11 |
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 Threaded Elbows
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What is the purpose of a threaded elbow in piping?
Are reducing elbows available with threaded ends?
Which thread standards are supported?
Can threaded elbows be reused?
