Lined Fittings
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Full technical data and dimensions
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PTFE Lined Unequal Lateral Tee
45° reducing lateral tee, NB 1"×1/2" to 14"×12"
Lined 45° lateral with a smaller branch than the run — 28 combinations from 1"×1/2" to 14"×12", with X₁ and X₂ setting-out dimensions.
| Product type | Lined 45° unequal lateral 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 1"×1/2" to NB 14"×12" (28 combinations) |
Product overview
What it does, and where it fits.
The unequal lateral combines the low-turbulence 45° entry of a lateral tee with a reduced branch, so a smaller feed can be introduced into a larger lined main without a separate reducer and without the impingement of a square branch.
As with the equal lateral, two dimensions are listed for each combination: X₁ along the run and X₂ as the offset. Both are governed by the run size NB₁.
Features
Built into every unit.
- 45° reduced branch — low turbulence, no separate reducer
- 28 size combinations from NB 1"×1/2" to 14"×12"
- Fabricated ASTM A 106 Gr. B body or SG iron casting
- X₁ and X₂ setting-out dimensions given for every combination
- Stainless steel body and higher diameters on request
Benefits
Why it earns its place in the line.
- Introduces a smaller stream into a main with minimum disturbance
- Avoids the erosion point of a square reducing branch
- 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
Applications & industries
Where it is specified.
Typical applications
- Injecting a dosing or additive stream into a lined main
- Reduced returns into a recirculating header
- Slurry take-offs 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 Lateral Tee.
Figures below are for this product only — every item in the range carries its own dimension table.
| Product type | Lined 45° unequal lateral 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 1"×1/2" to NB 14"×12" (28 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 |
| Branch angle | 45° |
| NB₁ | NB₂ | X₁ (±2) | X₂ (±2) | PTFE | PFA | FEP |
|---|---|---|---|---|---|---|
| 1" | 0.5" | 146 | 44 | — | ✓ | ✓ |
| 1" | 1.75" | 146 | 44 | — | ✓ | ✓ |
| 1.5" | 0.5" | 178 | 51 | — | ✓ | ✓ |
| 1.5" | 0.75" | 178 | 51 | — | ✓ | ✓ |
| 1.5" | 1" | 178 | 51 | — | ✓ | ✓ |
| 2" | 0.5" | 203 | 64 | — | ✓ | ✓ |
| 2" | 1" | 203 | 64 | — | ✓ | ✓ |
| 2" | 1.5" | 203 | 64 | — | ✓ | ✓ |
| 3" | 1" | 203 | 64 | — | ✓ | ✓ |
| 3" | 1.5" | 254 | 76 | — | ✓ | ✓ |
| 3" | 2" | 254 | 76 | — | ✓ | ✓ |
| 4" | 1" | 305 | 76 | — | ✓ | ✓ |
| 4" | 1.5" | 305 | 76 | — | ✓ | ✓ |
| 4" | 2" | 305 | 76 | — | ✓ | ✓ |
| 4" | 3" | 305 | 76 | — | ✓ | ✓ |
| 6" | 3" | 368 | 89 | — | ✓ | ✓ |
| 6" | 4" | 368 | 89 | — | ✓ | ✓ |
| 8" | 4" | 444 | 114 | — | ✓ | ✓ |
| 8" | 6" | 444 | 114 | — | ✓ | ✓ |
| 10" | 6" | 521 | 127 | — | ✓ | ✓ |
| 10" | 8" | 521 | 127 | — | ✓ | ✓ |
| 12" | 6" | 622 | 140 | — | ✓ | ✓ |
| 12" | 8" | 622 | 140 | — | ✓ | ✓ |
| 12" | 10" | 622 | 140 | — | ✓ | ✓ |
| 14" | 6" | 686 | 152 | — | ✓ | ✓ |
| 14" | 8" | 686 | 152 | — | ✓ | ✓ |
| 14" | 10" | 686 | 152 | — | ✓ | ✓ |
| 14" | 12" | 686 | 152 | — | ✓ | ✓ |
All dimensions in mm, reproduced row for row from the catalogue including the 3"×1" row, which is listed with the 2" figures.
Available on request
- Stainless steel body
- Higher diameters on request
FAQ
Questions we are asked about this item.
That is how the catalogue prints it. We have reproduced the table exactly rather than normalising it. Confirm the dimension with us before fabricating pipework against that combination.
No — they follow the run size NB₁, in the same way as the standard unequal tee.
Related products
Commonly specified alongside PTFE Lined Unequal Lateral Tee.
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.
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