Lined Fittings
Lined Fittings
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Full technical data and dimensions
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PTFE Lined Unequal Cross
Reducing four-way cross, NB 3/4"×1/2" to 16"×14"
Lined cross with branches smaller than the run — 38 combinations from 3/4"×1/2" to 16"×14", centre-line-to-face 75 mm to 381 mm.
| Product type | Lined unequal (reducing) cross |
|---|---|
| Body / steel grade | Cross 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.
The unequal cross takes two reduced branches off a lined run at a single point. It is the manifold equivalent of the reducing tee, and removes both the reducers and the extra joints that two separate reducing tees would need.
The catalogue lists 38 combinations covering run sizes NB 3/4" to 16". Body, flanges and lining follow the equal cross.
Features
Built into every unit.
- Two reduced branches at a single point on the run
- 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
- Class 300 flanges and stainless steel body 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 distribution manifolds off a lined main
- Opposed dosing or sampling points at one location
- Combined feed and drain 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 Cross.
Figures below are for this product only — every item in the range carries its own dimension table.
| Product type | Lined unequal (reducing) cross |
|---|---|
| Body / steel grade | Cross 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.
Available on request
- Flange connection: 1 fixed and 3 loose flanges, or 4 loose flanges
- ANSI B16.5 Class 300 flanges
- Stainless steel body
FAQ
Questions we are asked about this item.
Yes — the table gives one branch size NB₂ per combination, applied to both branches.
No. X follows the run size NB₁, matching the equal cross of that bore.
Related products
Commonly specified alongside PTFE Lined Unequal Cross.
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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