Fittings / TEE
Tee Fitting
Used to branch off a main line or to connect two pipelines together.
Technical Specifications
Key Features
- Even flow distribution
- High mechanical strength
- Low turbulence
- Easy weldability
- Standard dimensions
- Available in straight and reducing types
Applications
- Line branching
- System connection
- Instrumentation lines
- Sampling points
- Valve connections
- Equipment interfaces
Dimension Table
| Size | Outside Diameter (mm) | Thickness (mm) | Run | Outlet |
|---|---|---|---|---|
| 1/2" | 21.3 | 2.77 | 38 | 38 |
| 1" | 33.4 | 3.38 | 51 | 51 |
| 2" | 60.3 | 3.91 | 76 | 76 |
| 4" | 114.3 | 6.02 | 152 | 152 |
| 6" | 168.3 | 7.11 | 229 | 229 |
| 8" | 219.1 | 8.18 | 305 | 305 |
Technical Notes
- 01Available in equal and reducing types.
- 02If branch diameter is smaller, use reducing tee.
- 03Weld quality is critical in high-pressure systems.
What are pipe fittings?
Pipe fittings are the components that change direction, branch, reduce or terminate a pipeline: elbows (90°/45°), tees, reducers, caps and crosses. Butt-weld fittings are produced to ASTM A234 / EN 10253 material specs and ASME B16.9 dimensions, in sizes from 1/2" to 48".
Elbow types and connection methods
The most used fitting is the elbow: made in 90° and 45° angles, long radius (LR, radius = 1.5 × diameter) and short radius (SR, radius = 1 × diameter). LR elbows are standard because they give lower pressure drop and turbulence; SR elbows serve tight layouts. By connection method there are three families: butt-weld (ASME B16.9 — larger bores), socket-weld and threaded (ASME B16.11 — typically below 2"). The material range covers carbon steel (A234 WPB), alloy (WP11/WP22/WP91), stainless (A403) and low-temperature (A420) grades. All products ship with 3.1 certificates and full traceability.
Frequently Asked Questions
What does ASTM A234 WPB mean?+
A234 is the material spec for wrought carbon and alloy steel fittings for moderate and elevated temperature service; WPB is the most common carbon steel grade (W=weldable, P=pressure, B=grade B).
Long radius (LR) vs short radius (SR) elbow?+
An LR elbow has a bend radius of 1.5 × diameter, an SR elbow 1 × diameter. LR gives less pressure drop and erosion; SR is chosen only where space is tight.
Where are butt-weld, socket-weld and threaded fittings used?+
Butt-weld (B16.9) on larger-bore main lines; socket-weld and threaded (B16.11) typically below 2", on small-bore, instrument and utility lines.
How do EN 10253 and ASME B16.9 relate?+
Both are butt-weld fitting standards: B16.9 is the American system, EN 10253 the European one. The project specification determines which system sets dimensions and materials.
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