Buttweld Tee
What is a Buttweld Tee?
A Buttweld Tee is a T-shaped fitting used to combine or divide fluid flow in a pipeline. It features three connection points—two in-line and one branch—welded to the pipes to ensure a permanent, high-strength, leak-free joint.
Buttweld tees are available in equal and reducing types, making them essential for fluid distribution or collection systems in industries such as petrochemical, power generation, shipbuilding, and chemical processing.
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 Tee | Equal, Reducing |
| 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 Tee (Equal) | ½” | 21.3 mm | Schedule 40, 80 | 55 mm | 250g |
| Butt Weld Tee (Equal) | ¾” | 26.7 mm | Schedule 40, 80 | 65 mm | 350g |
| Butt Weld Tee (Equal) | 1″ | 33.4 mm | Schedule 40, 80 | 75 mm | 450g |
| Butt Weld Tee (Equal) | 1½” | 48.3 mm | Schedule 40, 80 | 90 mm | 700g |
| Butt Weld Tee (Equal) | 2″ | 60.3 mm | Schedule 40, 80 | 100 mm | 1.0kg |
| Butt Weld Tee (Equal) | 2½” | 73.0 mm | Schedule 40, 80 | 120 mm | 1.5kg |
| Butt Weld Tee (Equal) | 3″ | 88.9 mm | Schedule 40, 80 | 140 mm | 2.0kg |
| Butt Weld Tee (Equal) | 4″ | 114.3 mm | Schedule 40, 80 | 160 mm | 2.5kg |
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 Tees
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 reducing tee?
Can buttweld tees be used in horizontal and vertical orientations?
Are your tees seamless or welded?
Do tees meet PED and NACE standards?
