Lined Fittings
Lined Fittings
Request a quotation
Full technical data and dimensions
Request the datasheet
PTFE Lined Unequal Tee
Lined reducing tee, NB 3/4"×1/2" to 16"×14"
Lined tee with a smaller branch than the run — 38 size combinations from 3/4"×1/2" to 16"×14", centre-line-to-face 75 mm to 381 mm.
| Product type | Lined unequal (reducing) tee |
|---|---|
| Body / steel grade | Tee ASTM A 106 Gr. B or cast SG iron, flanges IS 2062 plate / ASTM A 105 |
| Lining material | PTFE / PFA / FEP |
| Liner standard | ASTM D 3307 (PFA), ASTM D 4894-19 |
| Lining options | Virgin or anti-static (conductive black) PTFE to ASTM D 4894 & D 4895, PFA to ASTM D 3307, FEP to ASTM D 2116 |
| Flange standard | ASME/ANSI B16.5 |
| Flange class | Class 150 standard; Class 300 on request |
| Size range | NB 3/4"×1/2" to NB 16"×14" (38 combinations) |
Product overview
What it does, and where it fits.
An unequal or reducing tee takes a smaller branch off a larger lined run without needing a separate reducer, saving a joint and a length of pipe. The catalogue lists 38 combinations covering run sizes NB 3/4" to 16".
Body and lining follow the equal tee: fabricated ASTM A 106 Gr. B or SG iron casting, IS 2062 or ASTM A 105 flanges to B16.5 Class 150, all flanges fixed as standard, and PFA and FEP marked applicable across the range.
Features
Built into every unit.
- Smaller branch taken directly off the run — no separate reducer needed
- 38 size combinations from NB 3/4"×1/2" to 16"×14"
- Fabricated ASTM A 106 Gr. B body or SG iron casting
- All flanges fixed as standard; loose flange options available
- Jacketed and stainless steel bodies on request
Benefits
Why it earns its place in the line.
- Outstanding corrosion resistance to aggressive organic and inorganic chemicals across a wide temperature range
- Non-stick, non-wetting bore — low surface energy keeps product moving and simplifies cleaning
- Chemically inert and pure; no additives, plasticisers, stabilisers or lubricants to contaminate the process fluid
- The lowest coefficient of friction of any solid, reducing pressure drop and deposit build-up
- Completely resistant to hydrolysis with an excellent barrier to water permeation
- Steel strength on the outside, fluoropolymer chemistry on the inside — at a fraction of the cost of solid exotic alloys
Applications & industries
Where it is specified.
Typical applications
- Reduced branch take-offs from lined headers
- Feeding smaller distribution lines from a main run
- Drain and vent connections below line size
- Corrosive acid, alkali and solvent transfer
- High-purity duties where metal pick-up is unacceptable
Industries served
- Chemical processing
- Pharmaceutical
- Petrochemical
- Oil & gas
- Power generation
- Pulp & paper
- Mining & metallurgy
- Agrochemicals & dyes
Technical data
Specification for PTFE Lined Unequal Tee.
Figures below are for this product only — every item in the range carries its own dimension table.
| Product type | Lined unequal (reducing) tee |
|---|---|
| Body / steel grade | Tee ASTM A 106 Gr. B or cast SG iron, flanges IS 2062 plate / ASTM A 105 |
| Lining material | PTFE / PFA / FEP |
| Liner standard | ASTM D 3307 (PFA), ASTM D 4894-19 |
| Lining options | Virgin or anti-static (conductive black) PTFE to ASTM D 4894 & D 4895, PFA to ASTM D 3307, FEP to ASTM D 2116 |
| Flange standard | ASME/ANSI B16.5 |
| Flange class | Class 150 standard; Class 300 on request |
| Size range | NB 3/4"×1/2" to NB 16"×14" (38 combinations) |
| Temperature range | Continuous service to 260 °C (PTFE melting point 327 °C, PFA 306 °C, FEP 260 °C) |
| Pressure rating | ASME/ANSI B16.5 Class 150 flanges as standard; Class 300 available on request |
| Manufacturing standard | ASTM F 1545 |
| Spark testing | Every lined component spark tested at 5000 × E volts (E = liner thickness in mm), to a maximum of 15 000 V |
| Hydro testing | Hydrostatic or pneumatic test according to the lining technique; hydrostatic test on components with vent holes |
| Inspection | Dimensional and visual examination of liner and steel parts — weld aspect, overall dimensions, collar size, liner thickness, surface flaws and paint thickness |
| Vent holes | 3 mm diameter vent holes — one per fitting; spools under 500 mm get a single central hole, spools over 500 mm get two holes about 150 mm from each end |
| External protection | Zinc epoxy primer, minimum 60 μm dry film, over steel sand-blasted to SA 2.5 |
| Certification | EN 10204 3.1 mill certificates and FDA certification for the fluoropolymer available on request |
| Standard version | All flanges fixed |
| NB₁ | NB₂ | Centre line to face X (±2) | PTFE | PFA | FEP |
|---|---|---|---|---|---|
| 0.75" | 0.5" | 75 | — | ✓ | ✓ |
| 1" | 0.5" | 89 | — | ✓ | ✓ |
| 1" | 1.75" | 89 | — | ✓ | ✓ |
| 1.5" | 0.5" | 102 | — | ✓ | ✓ |
| 1.5" | 0.75" | 102 | — | ✓ | ✓ |
| 1.5" | 1" | 102 | — | ✓ | ✓ |
| 2" | 0.5" | 114 | — | ✓ | ✓ |
| 2" | 1" | 114 | — | ✓ | ✓ |
| 2" | 1.5" | 114 | — | ✓ | ✓ |
| 2.5" | 1" | 127 | — | ✓ | ✓ |
| 2.5" | 1.5" | 127 | — | ✓ | ✓ |
| 2.5" | 2" | 127 | — | ✓ | ✓ |
| 3" | 1" | 140 | — | ✓ | ✓ |
| 3" | 1.5" | 140 | — | ✓ | ✓ |
| 3" | 2" | 140 | — | ✓ | ✓ |
| 3" | 2.5" | 140 | — | ✓ | ✓ |
| 4" | 1" | 165 | — | ✓ | ✓ |
| 4" | 1.5" | 165 | — | ✓ | ✓ |
| 4" | 2" | 165 | — | ✓ | ✓ |
| 4" | 2.5" | 165 | — | ✓ | ✓ |
| 4" | 3" | 165 | — | ✓ | ✓ |
| 6" | 3" | 203 | — | ✓ | ✓ |
| 6" | 4" | 203 | — | ✓ | ✓ |
| 8" | 4" | 229 | — | ✓ | ✓ |
| 8" | 6" | 229 | — | ✓ | ✓ |
| 10" | 6" | 280 | — | ✓ | ✓ |
| 10" | 8" | 280 | — | ✓ | ✓ |
| 12" | 6" | 305 | — | ✓ | ✓ |
| 12" | 8" | 305 | — | ✓ | ✓ |
| 12" | 10" | 305 | — | ✓ | ✓ |
| 14" | 6" | 356 | — | ✓ | ✓ |
| 14" | 8" | 356 | — | ✓ | ✓ |
| 14" | 10" | 356 | — | ✓ | ✓ |
| 14" | 12" | 356 | — | ✓ | ✓ |
| 16" | 8" | 381 | — | ✓ | ✓ |
| 16" | 10" | 381 | — | ✓ | ✓ |
| 16" | 12" | 381 | — | ✓ | ✓ |
| 16" | 14" | 381 | — | ✓ | ✓ |
All dimensions in mm. Centre-line-to-face is governed by the run size NB₁. Marks reproduced exactly as printed.
Available on request
- Flange connection: 1 fixed and 2 loose flanges, or 3 loose flanges
- Jacketed body
- Stainless steel body
FAQ
Questions we are asked about this item.
No. The catalogue gives one X dimension per run size NB₁ — for example every NB 4" tee is 165 mm regardless of whether the branch is 1", 1.5", 2", 2.5" or 3".
That is how the row is printed in the catalogue. Confirm the branch size with us on the enquiry so the drawing is issued against the bore you actually need.
Related products
Commonly specified alongside PTFE Lined Unequal Tee.
Lined Fittings
Lined Fittings
Lined Fittings
Enquiry
Tell us your line size — we'll confirm the spec.
Send the bore, the media, the temperature and pressure, and the flange standard you work to. Drawings and custom sizes welcome.
Not sure which spec fits your process?
Send your requirement — media, temperature, pressure, dimensions — and we'll recommend the right product or fabricate it.
Talk to an engineer