Lined Tee
Three-way branch fittings — available as Equal Tee (equal-diameter branches) and Unequal Tee (reduced branch).
1/2" – 12"
Size Range
Flanged, RF
Connection
Equal / Unequal
Types
PFA / FEP / PVDF
Lining
Branch Fittings for Lined Pipelines
UNP’s Lined Tee provides a 90° branch off a main pipe run — the most common branching fitting in lined-pipe networks. Available in two configurations to cover both equal-diameter splits and reduced-branch take-offs.
The Equal Tee has all three legs at the same diameter — used where flow splits roughly evenly. The Unequal Tee has a smaller branch take-off from a larger main — standard for instrumentation tappings, drains, vents, and reduced-flow process lines.
Both share the same body materials (WPB / WP 316), lining options (PFA, FEP, PVDF, ETFE, PPH), and flange dimensions.
Why Choose This Fitting
- ✓Equal & Unequal configurations
- ✓Investment cast bodies
- ✓PFA / FEP / PVDF / ETFE / PPH lining
- ✓Sizes 1/2" through 12"
- ✓Pressure & vacuum rated
Choose Your Tee Configuration
Variant A — EqualLined Equal Tee
All three legs at the same diameter. Use for symmetric branching, distribution headers, and process loops where flow splits roughly evenly.
- All branches same diameter
- Sizes: 1/2" through 12"
- Standard ANSI / DIN flanges
- Best for: distribution headers, process loops
Variant B — UnequalLined Unequal Tee
Reduced branch take-off from a larger main pipe. Standard for instrumentation tappings, drain/vent points, and reduced-flow side-streams.
- Smaller branch off larger main
- Sizes: 1" through 8" (mixed)
- Standard ANSI / DIN flanges
- Best for: instrumentation, drains, vents
Common to Both Variants
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 |
Other Lined Fittings
Lined Elbow
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Lined Equal Cross
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Lined Reducing Flange
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Lined Y Type Strainer
LINED PIPE & FITTINGS
Get the Right Tee for Your Line
Tell us your main and branch sizes, lining preference, and quantity — we’ll spec the exact tee for your line in 24 hours.