Lined Pipes & Spools
Lined Pipes & Spools
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Full technical data and dimensions
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PTFE Lined Spool Pipe
Straight lined spool, NB 1/2" to 16", 100–3000 mm
Straight carbon steel spool lined with PTFE, PFA or FEP — the backbone of a corrosion-resistant pipeline, supplied NB 1/2" to 16" in face-to-face lengths from 100 mm to 3000 mm.
| Product type | Straight lined spool pipe |
|---|---|
| Body / steel grade | ASTM A 106 Gr. B pipe, IS 2062 plate / ASTM A 105 flanges |
| Lining material | PTFE / PFA / FEP |
| Liner standard | ASTM D 1457 / ASTM D 4894-19 (PTFE), ASTM D 3307 (PFA), ASTM D 2116 (FEP) |
| 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 1/2" to NB 16" |
Product overview
What it does, and where it fits.
The lined spool pipe is the run element of a fluoropolymer lined pipeline. A seamless ASTM A 106 Gr. B carbon steel pipe carries the pressure and the mechanical load; a paste-extruded fluoropolymer liner, flared over both flange faces, carries the chemistry. The result is a line that takes the loads of a steel system while presenting only PTFE, PFA or FEP to the process fluid.
The standard build leaves the factory with one fixed flange and one lap-joint (loose) flange, which lets the installer rotate the loose flange to pick up bolt holes without twisting the spool or stressing the liner. Two fixed flanges or two loose flanges can be specified instead. Vent holes are drilled through the steel wall so that any permeated vapour escapes rather than collapsing the liner, and so that a liner breach shows itself at the pressure test.
Every spool is spark tested at 5000 V per millimetre of liner thickness up to 15 000 V, dimensionally checked against the tolerance table, and finished in zinc epoxy primer over grit-blasted steel.
Features
Built into every unit.
- Seamless carbon steel body to ASTM A 106 Gr. B with ASME/ANSI B16.5 Class 150 flanges
- Paste-extruded PTFE, PFA or FEP liner flared over both flange faces
- Standard build: one fixed flange and one lap joint flange for easy bolt-hole alignment
- Vent holes to relieve permeation pressure behind the liner
- Face-to-face 100 mm to 3000 mm across the full NB 1/2" – 16" range
- Jacketed and stainless steel bodies available 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
- Main process runs carrying strong acids, alkalis and solvents
- High-purity transfer where metal pick-up cannot be tolerated
- Effluent headers and process waste lines
- Replacement of glass-lined or exotic-alloy piping at lower cost
- Retrofitting corroded carbon steel lines without changing the flange pattern
Industries served
- Chemical processing
- Pharmaceutical
- Petrochemical
- Oil & gas
- Power generation
- Pulp & paper
- Mining & metallurgy
- Agrochemicals & dyes
Technical data
Specification for PTFE Lined Spool Pipe.
Figures below are for this product only — every item in the range carries its own dimension table.
| Product type | Straight lined spool pipe |
|---|---|
| Body / steel grade | ASTM A 106 Gr. B pipe, IS 2062 plate / ASTM A 105 flanges |
| Lining material | PTFE / PFA / FEP |
| Liner standard | ASTM D 1457 / ASTM D 4894-19 (PTFE), ASTM D 3307 (PFA), ASTM D 2116 (FEP) |
| 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 1/2" to NB 16" |
| 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 |
| Face to face | 100 mm minimum to 3000 mm maximum, size dependent |
| Standard version | 1 fixed flange and 1 lap joint flange |
| Size | Length L min (±2) | Length L max (±2) | PTFE | PFA | FEP |
|---|---|---|---|---|---|
| 0.5" | 100 | 3000 | ✓ | ✓ | ✓ |
| 0.75" | 100 | 3000 | ✓ | ✓ | ✓ |
| 1" | 100 | 3000 | ✓ | ✓ | ✓ |
| 1.5" | 100 | 3000 | ✓ | ✓ | ✓ |
| 2" | 100 | 3000 | ✓ | ✓ | ✓ |
| 2.5" | 120 | 3000 | ✓ | ✓ | ✓ |
| 3" | 120 | 3000 | ✓ | ✓ | ✓ |
| 4" | 120 | 3000 | ✓ | ✓ | ✓ |
| 6" | 150 | 3000 | ✓ | ✓ | ✓ |
| 8" | 150 | 3000 | ✓ | ✓ | ✓ |
| 10" | 150 | 3000 | ✓ | ✓ | ✓ |
| 12" | 200 | 3000 | ✓ | ✓ | ✓ |
| 14" | 200 | 3000 | ✓ | ✓ | ✓ |
| 16" | 200 | 3000 | ✓ | ✓ | ✓ |
All lengths in mm. ✓ = applicable, — = not applicable, exactly as marked in the catalogue.
Available on request
- Flange connection: 2 fixed flanges, or 2 loose flanges
- Jacketed body
- Stainless steel body
FAQ
Questions we are asked about this item.
3000 mm face to face across the whole NB 1/2" to 16" range. Longer runs are made up from multiple spools; a jacketed spool can be supplied up to 6000 mm in the smaller bores.
They are vent holes, 3 mm in diameter. They stop back pressure building between the steel housing and the liner from permeated vapour, reveal a liner leak during the pressure test, and let any corrosion behind the liner be spotted early. Spools under 500 mm get one central hole; longer spools get two, about 150 mm from each end.
Generally no — the flared liner faces seal against each other. A gasket is required when a lined component is bolted to a different material, and when the joint is repeatedly assembled and dismantled.
Yes. The standard build is one fixed and one lap joint flange, but two fixed or two loose flanges can be specified.
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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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