Lined Unequal Tee
Reduced branch take-off from a larger main pipe. Used for instrumentation tappings, drains, vents, and reduced-flow side-streams.
1" – 8" (mixed)
Size Range
Flanged, RF
Connection
Reduced
Branch
PFA / FEP / PVDF
Lining
Unequal Tee Configuration
The Lined Unequal Tee provides a smaller-diameter branch take-off from a larger main run — the standard fitting for instrumentation tappings (pressure / temperature sensors), drain points, vent connections, and any reduced-flow side-stream.
Available in a range of size combinations from 1″ main / 1/2″ branch up to 8″ main / 6″ branch. Both legs share the same body, lining materials, and flange dimensions as the rest of the UNP lined-pipeline range.
Use this in conjunction with our Lined Sampling Valves, Lined Sight Glasses, and lined instrument-line valves for a complete corrosion-resistant instrumentation setup.
Why Choose This Fitting
- ✓Reduced branch off main run
- ✓Multiple main/branch size combinations
- ✓Standard for instrumentation tappings
- ✓ANSI / DIN flange options on both legs
- ✓Investment cast for uniform lining
Dimensions, Materials, Tests
Dimensional Table — Unequal Tee
All dimensions in inches and millimeters.
| Main Size | Branch Size | Main Face-to-Face (mm) | Branch Face-to-Centre (mm) | Lining Thk (mm) |
|---|---|---|---|---|
| 1" x 1/2" | 1" x 1/2" | 108 | 79 | 3.2 |
| 1.5" x 1" | 1.5" x 1" | 127 | 98 | 3.2 |
| 2" x 1" | 2" x 1" | 152 | 98 | 3.5 |
| 2" x 1.5" | 2" x 1.5" | 152 | 121 | 3.5 |
| 3" x 1.5" | 3" x 1.5" | 190 | 121 | 4.0 |
| 3" x 2" | 3" x 2" | 190 | 152 | 4.0 |
| 4" x 2" | 4" x 2" | 229 | 152 | 4.5 |
| 4" x 3" | 4" x 3" | 229 | 190 | 4.5 |
| 6" x 3" | 6" x 3" | 279 | 190 | 5.5 |
| 6" x 4" | 6" x 4" | 279 | 229 | 5.5 |
| 8" x 4" | 8" x 4" | 343 | 229 | 5.5 |
| 8" x 6" | 8" x 6" | 343 | 279 | 5.5 |
Materials Available
| Component | Options Available |
|---|---|
| Body Casting | ASTM A 234 GR. WPB / WPC, ASTM A 403 GR. WP 316 / WP 316L |
| Lining Materials | PFA / FEP / ETFE / PVDF / PPH / ECTFE / Antistatic PFA |
| Standard Flange Rating | ANSI B 16.5 150# / DIN PN 10 / JIS |
Tests Performed
| Test | Standard / Result |
|---|---|
| Spark Test (Lined Components) | 20 KVDC |
| Hydrostatic Test | BS EN 12266-1 |
| Visual / Dimensional Inspection | 100% Sampled |
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Order the Unequal Tee
Tell us your main and branch sizes, lining preference, and quantity — we’ll spec the exact unequal tee for your line.