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PTFE Lined Instrument Tee
Bar-stock lined instrument tee, NB 1"×1/2" to 14"×2"
Lined tee with a short instrument branch, machined from carbon steel round bar — 38 combinations from 1"×1/2" to 14"×2", centre-line-to-face 90 mm to 375 mm.
| Product type | Lined instrument tee, bar-stock body |
|---|---|
| Body / steel grade | Body carbon steel round bar, pipe ASTM A 106 Gr. B, 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"×2" (38 combinations) |
Product overview
What it does, and where it fits.
An instrument tee provides a small, rigid, lined branch for a pressure transmitter, thermowell, pH probe or sampling point. Unlike a fabricated tee its body is machined from carbon steel round bar, which gives the short branch the stiffness to carry an instrument without distorting the liner.
Branch sizes run from NB 1/2" to 2" on run sizes from NB 1" to 14". The catalogue marks PFA and FEP as applicable across the whole range and gives the liner specification as ASTM D 3307 and ASTM D 4894-19.
Features
Built into every unit.
- Body machined from carbon steel round bar for branch rigidity
- 38 combinations, run NB 1" to 14" with branch NB 1/2" to 2"
- Pipe to ASTM A 106 Gr. B, flanges IS 2062 plate or ASTM A 105
- ASME/ANSI B16.5 Class 150 flange drilling
- Stainless steel body and higher diameters on request
Benefits
Why it earns its place in the line.
- Rigid lined mounting point for instruments — no branch distortion
- Keeps the instrument tapping fully fluoropolymer lined
- 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
- Pressure and temperature instrument tappings on lined lines
- pH and conductivity probe mounting
- Sampling points on corrosive service
- Chemical dosing injection points
Industries served
- Chemical processing
- Pharmaceutical
- Petrochemical
- Oil & gas
- Power generation
- Pulp & paper
- Mining & metallurgy
- Agrochemicals & dyes
Technical data
Specification for PTFE Lined Instrument Tee.
Figures below are for this product only — every item in the range carries its own dimension table.
| Product type | Lined instrument tee, bar-stock body |
|---|---|
| Body / steel grade | Body carbon steel round bar, pipe ASTM A 106 Gr. B, 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"×2" (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 |
| NB₁ | NB₂ | Centre line to face X (±2) | PTFE | PFA | FEP |
|---|---|---|---|---|---|
| 1" | 0.5" | 90 | — | ✓ | ✓ |
| 1" | 0.75" | 90 | — | ✓ | ✓ |
| 1" | 1" | 90 | — | ✓ | ✓ |
| 1.5" | 0.5" | 110 | — | ✓ | ✓ |
| 1.5" | 0.75" | 110 | — | ✓ | ✓ |
| 1.5" | 1" | 110 | — | ✓ | ✓ |
| 1.5" | 1.5" | 110 | — | ✓ | ✓ |
| 2" | 0.5" | 115 | — | ✓ | ✓ |
| 2" | 0.75" | 115 | — | ✓ | ✓ |
| 2" | 1" | 115 | — | ✓ | ✓ |
| 2" | 1.5" | 115 | — | ✓ | ✓ |
| 2" | 2" | 115 | — | ✓ | ✓ |
| 2.5" | 0.5" | 125 | — | ✓ | ✓ |
| 2.5" | 0.75" | 125 | — | ✓ | ✓ |
| 2.5" | 1" | 125 | — | ✓ | ✓ |
| 2.5" | 1.5" | 125 | — | ✓ | ✓ |
| 2.5" | 2" | 125 | — | ✓ | ✓ |
| 3" | 0.5" | 135 | — | ✓ | ✓ |
| 3" | 0.75" | 135 | — | ✓ | ✓ |
| 3" | 1" | 135 | — | ✓ | ✓ |
| 3" | 1.5" | 135 | — | ✓ | ✓ |
| 3" | 2" | 135 | — | ✓ | ✓ |
| 4" | 0.5" | 150 | — | ✓ | ✓ |
| 4" | 0.75" | 150 | — | ✓ | ✓ |
| 4" | 1" | 150 | — | ✓ | ✓ |
| 4" | 1.5" | 150 | — | ✓ | ✓ |
| 4" | 2" | 150 | — | ✓ | ✓ |
| 6" | 0.5" | 180 | — | ✓ | ✓ |
| 6" | 0.75" | 180 | — | ✓ | ✓ |
| 6" | 1" | 180 | — | ✓ | ✓ |
| 6" | 1.5" | 180 | — | ✓ | ✓ |
| 6" | 2" | 180 | — | ✓ | ✓ |
| 8" | 0.5" | 210 | — | ✓ | ✓ |
| 8" | 0.75" | 210 | — | ✓ | ✓ |
| 8" | 1" | 210 | — | ✓ | ✓ |
| 8" | 1.5" | 210 | — | ✓ | ✓ |
| 8" | 2" | 210 | — | ✓ | ✓ |
| 10" | 0.5" | 240 | — | ✓ | ✓ |
| 10" | 0.75" | 240 | — | ✓ | ✓ |
| 10" | 1" | 240 | — | ✓ | ✓ |
| 10" | 1.5" | 240 | — | ✓ | ✓ |
| 10" | 2" | 240 | — | ✓ | ✓ |
| 12" | 0.5" | 340 | — | ✓ | ✓ |
| 12" | 0.75" | 340 | — | ✓ | ✓ |
| 12" | 1" | 340 | — | ✓ | ✓ |
| 12" | 1.5" | 340 | — | ✓ | ✓ |
| 12" | 2" | 340 | — | ✓ | ✓ |
| 14" | 0.5" | 375 | — | ✓ | ✓ |
| 14" | 0.75" | 375 | — | ✓ | ✓ |
| 14" | 1" | 375 | — | ✓ | ✓ |
| 14" | 1.5" | 375 | — | ✓ | ✓ |
| 14" | 2" | 375 | — | ✓ | ✓ |
All dimensions in mm. Centre-line-to-face is governed by the run size NB₁.
Available on request
- Stainless steel body
- Higher diameters on request
FAQ
Questions we are asked about this item.
A short instrument branch has to carry the weight and bending load of a transmitter or thermowell. A bar-stock body gives that stiffness without letting the branch flex and stress the liner.
Yes — that is one of the standard uses. Tell us the instrument connection required and we will confirm the branch detail.
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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.
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