Lined Elbow
PFA-lined investment-cast elbows for directional changes in corrosive pipelines — available in 90° and 45° bend angles.
1/2" – 20"
Size Range
Flanged, RF
Connection
90° / 45°
Bend Angles
PFA / FEP / PVDF
Lining
Directional Change Fittings for Corrosive Pipelines
UNP’s Lined Elbow fittings provide smooth, low-turbulence directional changes in lined-pipeline systems. Investment-cast bodies (ASTM A 234 GR. WPB or A 403 GR. WP 316) are lined with PFA, FEP, PVDF, ETFE, or PPH to deliver the same corrosion resistance as the rest of the lined-pipeline system.
Two bend angles cover almost every directional requirement: the 90° elbow for sharp right-angle changes (most common in process plant layouts), and the 45° elbow for gentler diagonal changes (lower pressure drop, easier flow through bends).
Both variants share the same flange dimensions, bolt circles, and lining materials — differing only in the F (face-to-centre) distance specific to each bend angle.
Why Choose This Fitting
- ✓Two bend angles — 90° & 45°
- ✓Sizes 1/2" through 20" (15 standard sizes)
- ✓Investment cast body (WPB / WP 316)
- ✓PFA / FEP / PVDF / PPH lining options
- ✓20 KVDC Spark Tested
Choose Your Bend Angle
Both elbows share identical specs and dimensions — pick by directional change required.
Variant A — 90° Lined Elbow 90°
Right-angle directional change for sharp turns in pipeline layouts. The most common elbow used in process plant piping.
- Sharp 90° bend — standard turn
- F (face-to-centre): 65–457mm
- Same flange dims as 45° variant
- Sizes: 1/2" through 20"
- Best for: tight space transitions, racking
Variant B — 45° Lined Elbow 45°
Diagonal directional change for gentler turns. Lower pressure drop and smoother flow than 90° — preferred where two are combined for offsets.
- Gentle 45° bend — lower turbulence
- F (face-to-centre): 44–241mm
- Same flange dims as 90° variant
- Sizes: 1/2" through 20"
- Best for: offsets, gradual line shifts
Common to Both Variants
Materials, tests, and finishes are identical across both bend angles.
Materials Available
| Component | Options Available |
|---|---|
| Body Casting | ASTM A 234 GR. WPB / WPC, ASTM A 403 GR. WP 316 / WP 316L |
| Lining Materials | PFA / FEP / ETFE / PVDF / PPH / ECTFE / Antistatic PFA |
| Pipe Schedule | SCH 20 (8"+ sizes) / SCH 40 (≤6" sizes) |
Tests Performed
| Test | Standard / Result |
|---|---|
| Spark Test (Lined Components) | 20 KVDC |
| Hydrostatic Test | BS EN 12266-1 |
| Visual / Dimensional Inspection | 100% Sampled |
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Get the Right Elbow for Your Line
Tell us your size, bend angle (90° or 45°), and lining preference — we’ll spec the exact elbow for your line in 24 hours.