FEP tubing is the preferred fluoropolymer for continuous-length small diameter applications, offering an optimal balance of performance and economy. While maximum service temperature is limited to 204°C (400°F), FEP delivers chemical and dielectric properties comparable to PTFE with superior optical clarity and processing characteristics.
Performance Characteristics
• Exceptional optical clarity ideal for sight glass and flow monitoring applications
• Chemical inertness to most industrial chemicals and solvents
• Non-flammable with high thermal stability
• Superior gas and vapor permeability control
• Excellent UV transmission properties
• Enhanced processability for complex geometries
Available Configurations
Standard and custom diameters available in straight lengths, coiled configurations, convoluted designs, and heat-shrink constructions. Multiple colors available to meet specific identification and routing requirements.
Applications
FEP tubing serves critical functions across aerospace and transportation technology, electronics components and insulators, chemical and pharmaceutical manufacturing, food processing, and environmental sciences. Its clarity and chemical resistance make it ideal for air sampling systems, precision fluid transfer devices, water processing systems, and applications requiring visual flow confirmation.
Key Advantages
Compared to PTFE, FEP offers superior transparency, better gas permeability control, and enhanced fabrication flexibility, making it the economical choice for applications requiring chemical resistance with visual monitoring capabilities.
3/32
1/32
0.031
0.094
+/- 0.004
+/- 0.003
480 (33)
2400 (165)
1/2
1/8
1/16
0.031
0.125
+/- 0.004
+/- 0.003
360 (25)
1800 (124)
1/2
5/32
3/32
0.031
0.157
+/- 0.005
+/- 0.003
282 (19)
1412 (97)
1/2
3/16
1/8
0.031
0.188
+/- 0.005
+/- 0.003
231 (16)
1154 (80)
1/2
3/16
1/16
0.062
0.188
+/- 0.005
+/- 0.003
480 (33)
2400 (165)
1/2
1/4
3/16
0.031
0.250
+/- 0.005
+/- 0.003
168 (11.6)
840 (58)
1
1/4
3/16
0.047
0.250
+/- 0.005
+/- 0.003
263 (18)
1315 (91)
3/4
1/4
1/8
0.062
0.250
+/- 0.005
+/- 0.003
360 (24.8)
1800 (124)
1/2
5/16
1/4
0.031
0.313
+/- 0.005
+/- 0.003
132 (9.1)
359 (24.8)
3/4
5/16
3/16
0.062
0.313
+/- 0.005
+/- 0.003
282 (19.4)
1412 (97.4)
1/2
3/8
5/16
0.031
0.375
+/- 0.005
+/- 0.003
109 (7.5)
541 (37.3)
2-1/2
3/8
1/4
0.062
0.375
+/- 0.005
+/- 0.003
231 (15.9)
1154 (79.6)
1
7/16
3/8
0.031
0.438
+/- 0.005
+/- 0.003
92 (6.3)
459 (31.6)
8
7/16
5/16
0.062
0.438
+/- 0.005
+/- 0.003
195 (13.4)
973 (67.1)
12
1/2
7/16
0.031
0.500
+/- 0.006
+/- 0.003
80 (5.5)
398 (27.4)
4
1/2
3/8
0.062
0.500
+/- 0.006
+/- 0.003
168 (11.6)
840 (57.9)
2
9/16
1/2
0.031
0.562
+/- 0.006
+/- 0.003
70.3 (4.8)
352 (24.3)
4-1/2
5/8
9/16
0.031
0.625
+/- 0.006
+/- 0.003
63 (4.3)
315 (21.7)
5-1/2
5/8
1/2
0.062
0.625
+/- 0.006
+/- 0.003
132 (9.1)
659 (45.4)
3
11/16
5/8
0.031
0.688
+/- 0.006
+/- 0.003
57 (3.9)
285 (19.7)
4
3/4
11/16
0.031
0.750
+/- 0.006
+/- 0.003
52 (3.6)
260 (17.9)
8
3/4
5/8
0.062
0.750
+/- 0.006
+/- 0.003
108 (7.4)
541 (37.3)
6
7/8
3/4
0.062
0.875
+/- 0.007
+/- 0.003
92 (6.3)
459 (31.6)
12
1
7/8
0.062
1.000
+/- 0.010
+/- 0.003
80 (5.5)
398 (27.4)
16
1.1
1
0.040
1.100
+/- 0.010
+/- 0.004
57 (3.9)
285 (19.7)
1-1/8
1
0.062
1.125
+/- 0.015
+/- 0.003
70 (4.8)
352 (24.3)
1-1/4
1-1/8
0.062
1.250
+/- 0.015
+/- 0.004
63 (4.3)
315 (21.7)
1-3/8
1-1/4
0.040
1.375
+/- 0.015
+/- 0.004
57 (3.9)
285 (19.7)
FEP Fractional Sizes, O.D. 3/32", I.D. 1/32"
O.D. (in):
3/32
I.D. (in):
1/32
Wall (in):
0.031
Nominal O.D.:
0.094
O.D.
Tolerance (in):
+/- 0.004
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
480 (33)
Burst Pressure+
PSIG(bar):
2400 (165)
Minimum Bend Radius (in):
1/2
FEP Fractional Sizes, O.D. 1/8", I.D. 1/16"
O.D. (in):
1/8
I.D. (in):
1/16
Wall (in):
0.031
Nominal O.D.:
0.125
O.D.
Tolerance (in):
+/- 0.004
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
360 (25)
Burst Pressure+
PSIG(bar):
1800 (124)
Minimum Bend Radius (in):
1/2
FEP Fractional Sizes, O.D. 5/32", I.D. 3/32"
O.D. (in):
5/32
I.D. (in):
3/32
Wall (in):
0.031
Nominal O.D.:
0.157
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
282 (19)
Burst Pressure+
PSIG(bar):
1412 (97)
Minimum Bend Radius (in):
1/2
FEP Fractional Sizes, O.D. 3/16", I.D. 1/8"
O.D. (in):
3/16
I.D. (in):
1/8
Wall (in):
0.031
Nominal O.D.:
0.188
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
231 (16)
Burst Pressure+
PSIG(bar):
1154 (80)
Minimum Bend Radius (in):
1/2
FEP Fractional Sizes, O.D. 3/16", I.D. 1/16"
O.D. (in):
3/16
I.D. (in):
1/16
Wall (in):
0.062
Nominal O.D.:
0.188
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
480 (33)
Burst Pressure+
PSIG(bar):
2400 (165)
Minimum Bend Radius (in):
1/2
FEP Fractional Sizes, O.D. 1/4", I.D. 3/16"
O.D. (in):
1/4
I.D. (in):
3/16
Wall (in):
0.031
Nominal O.D.:
0.250
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
168 (11.6)
Burst Pressure+
PSIG(bar):
840 (58)
Minimum Bend Radius (in):
1
FEP Fractional Sizes, O.D. 1/4", I.D. 5/32"
O.D. (in):
1/4
I.D. (in):
3/16
Wall (in):
0.047
Nominal O.D.:
0.250
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
263 (18)
Burst Pressure+
PSIG(bar):
1315 (91)
Minimum Bend Radius (in):
3/4
FEP Fractional Sizes, O.D. 1/4", I.D. 1/8"
O.D. (in):
1/4
I.D. (in):
1/8
Wall (in):
0.062
Nominal O.D.:
0.250
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
360 (24.8)
Burst Pressure+
PSIG(bar):
1800 (124)
Minimum Bend Radius (in):
1/2
FEP Fractional Sizes, O.D. 5/16", I.D. 1/4"
O.D. (in):
5/16
I.D. (in):
1/4
Wall (in):
0.031
Nominal O.D.:
0.313
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
132 (9.1)
Burst Pressure+
PSIG(bar):
359 (24.8)
Minimum Bend Radius (in):
3/4
FEP Fractional Sizes, O.D. 5/16", I.D. 3/16"
O.D. (in):
5/16
I.D. (in):
3/16
Wall (in):
0.062
Nominal O.D.:
0.313
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
282 (19.4)
Burst Pressure+
PSIG(bar):
1412 (97.4)
Minimum Bend Radius (in):
1/2
FEP Fractional Sizes, O.D. 3/8", I.D. 5/16"
O.D. (in):
3/8
I.D. (in):
5/16
Wall (in):
0.031
Nominal O.D.:
0.375
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
109 (7.5)
Burst Pressure+
PSIG(bar):
541 (37.3)
Minimum Bend Radius (in):
2-1/2
FEP Fractional Sizes, O.D. 3/8", I.D. 1/4"
O.D. (in):
3/8
I.D. (in):
1/4
Wall (in):
0.062
Nominal O.D.:
0.375
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
231 (15.9)
Burst Pressure+
PSIG(bar):
1154 (79.6)
Minimum Bend Radius (in):
1
FEP Fractional Sizes, O.D. 7/16", I.D. 3/8"
O.D. (in):
7/16
I.D. (in):
3/8
Wall (in):
0.031
Nominal O.D.:
0.438
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
92 (6.3)
Burst Pressure+
PSIG(bar):
459 (31.6)
Minimum Bend Radius (in):
8
FEP Fractional Sizes, O.D. 7/16", I.D. 5/16"
O.D. (in):
7/16
I.D. (in):
5/16
Wall (in):
0.062
Nominal O.D.:
0.438
O.D.
Tolerance (in):
+/- 0.005
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
195 (13.4)
Burst Pressure+
PSIG(bar):
973 (67.1)
Minimum Bend Radius (in):
12
FEP Fractional Sizes, O.D. 1/2", I.D. 7/16"
O.D. (in):
1/2
I.D. (in):
7/16
Wall (in):
0.031
Nominal O.D.:
0.500
O.D.
Tolerance (in):
+/- 0.006
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
80 (5.5)
Burst Pressure+
PSIG(bar):
398 (27.4)
Minimum Bend Radius (in):
4
FEP Fractional Sizes, O.D. 1/2", I.D. 3/8"
O.D. (in):
1/2
I.D. (in):
3/8
Wall (in):
0.062
Nominal O.D.:
0.500
O.D.
Tolerance (in):
+/- 0.006
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
168 (11.6)
Burst Pressure+
PSIG(bar):
840 (57.9)
Minimum Bend Radius (in):
2
FEP Fractional Sizes, O.D. 9/16", I.D. 1/2"
O.D. (in):
9/16
I.D. (in):
1/2
Wall (in):
0.031
Nominal O.D.:
0.562
O.D.
Tolerance (in):
+/- 0.006
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
70.3 (4.8)
Burst Pressure+
PSIG(bar):
352 (24.3)
Minimum Bend Radius (in):
4-1/2
FEP Fractional Sizes, O.D. 5/8", I.D. 9/16"
O.D. (in):
5/8
I.D. (in):
9/16
Wall (in):
0.031
Nominal O.D.:
0.625
O.D.
Tolerance (in):
+/- 0.006
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
63 (4.3)
Burst Pressure+
PSIG(bar):
315 (21.7)
Minimum Bend Radius (in):
5-1/2
FEP Fractional Sizes, O.D. 5/8", I.D. 1/2"
O.D. (in):
5/8
I.D. (in):
1/2
Wall (in):
0.062
Nominal O.D.:
0.625
O.D.
Tolerance (in):
+/- 0.006
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
132 (9.1)
Burst Pressure+
PSIG(bar):
659 (45.4)
Minimum Bend Radius (in):
3
FEP Fractional Sizes, O.D. 11/16", I.D. 5/8"
O.D. (in):
11/16
I.D. (in):
5/8
Wall (in):
0.031
Nominal O.D.:
0.688
O.D.
Tolerance (in):
+/- 0.006
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
57 (3.9)
Burst Pressure+
PSIG(bar):
285 (19.7)
Minimum Bend Radius (in):
4
FEP Fractional Sizes, O.D. 3/4", I.D. 11/16"
O.D. (in):
3/4
I.D. (in):
11/16
Wall (in):
0.031
Nominal O.D.:
0.750
O.D.
Tolerance (in):
+/- 0.006
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
52 (3.6)
Burst Pressure+
PSIG(bar):
260 (17.9)
Minimum Bend Radius (in):
8
FEP Fractional Sizes, O.D. 3/4", I.D. 5/8"
O.D. (in):
3/4
I.D. (in):
5/8
Wall (in):
0.062
Nominal O.D.:
0.750
O.D.
Tolerance (in):
+/- 0.006
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
108 (7.4)
Burst Pressure+
PSIG(bar):
541 (37.3)
Minimum Bend Radius (in):
6
FEP Fractional Sizes, O.D. 7/8", I.D. 3/4"
O.D. (in):
7/8
I.D. (in):
3/4
Wall (in):
0.062
Nominal O.D.:
0.875
O.D.
Tolerance (in):
+/- 0.007
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
92 (6.3)
Burst Pressure+
PSIG(bar):
459 (31.6)
Minimum Bend Radius (in):
12
FEP Fractional Sizes, O.D. 1", I.D. 7/8"
O.D. (in):
1
I.D. (in):
7/8
Wall (in):
0.062
Nominal O.D.:
1.000
O.D.
Tolerance (in):
+/- 0.010
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
80 (5.5)
Burst Pressure+
PSIG(bar):
398 (27.4)
Minimum Bend Radius (in):
16
FEP Fractional Sizes, O.D. 1.1", I.D. 1"
O.D. (in):
1.1
I.D. (in):
1
Wall (in):
0.040
Nominal O.D.:
1.100
O.D.
Tolerance (in):
+/- 0.010
Wall
Tolerance (in):
+/- 0.004
Working Pressure*
PSIG (bar):
57 (3.9)
Burst Pressure+
PSIG(bar):
285 (19.7)
Minimum Bend Radius (in):
FEP Fractional Sizes, O.D. 1-1/8", I.D. 1"
O.D. (in):
1-1/8
I.D. (in):
1
Wall (in):
0.062
Nominal O.D.:
1.125
O.D.
Tolerance (in):
+/- 0.015
Wall
Tolerance (in):
+/- 0.003
Working Pressure*
PSIG (bar):
70 (4.8)
Burst Pressure+
PSIG(bar):
352 (24.3)
Minimum Bend Radius (in):
FEP Fractional Sizes, O.D. 1-1/4", I.D. 1-1/8"
O.D. (in):
1-1/4
I.D. (in):
1-1/8
Wall (in):
0.062
Nominal O.D.:
1.250
O.D.
Tolerance (in):
+/- 0.015
Wall
Tolerance (in):
+/- 0.004
Working Pressure*
PSIG (bar):
63 (4.3)
Burst Pressure+
PSIG(bar):
315 (21.7)
Minimum Bend Radius (in):
FEP Fractional Sizes, O.D. 1-3/8", I.D. 1-1/4"
O.D. (in):
1-3/8
I.D. (in):
1-1/4
Wall (in):
0.040
Nominal O.D.:
1.375
O.D.
Tolerance (in):
+/- 0.015
Wall
Tolerance (in):
+/- 0.004
Working Pressure*
PSIG (bar):
57 (3.9)
Burst Pressure+
PSIG(bar):
285 (19.7)
Minimum Bend Radius (in):
4
2
+/- 0.11
0.157
0.078
+/- 0.004
360 (25)
1800 (124)
1/2
5
3
+/- 0.11
0.197
0.118
+/- 0.004
282 (19)
1412 (97.4)
1/2
6
4
+/- 0.13
0.236
0.157
+/- 0.005
231 (16)
1154 (79.6)
1/2
7
5
+/- 0.13
0.276
0.197
+/- 0.005
195 (13)
973 (67.1)
1-3/4
8
6
+/- 0.13
0.315
0.236
+/- 0.005
168 (11.6)
840 (57.9)
1-3/4
9
7
+/- 0.13
0.354
0.276
+/- 0.005
148 (10.2)
738 (50.9)
2-1/2
10
8
+/- 0.13
0.393
0.315
+/- 0.005
132 (9.1)
659 (45.4)
2-1/2
12
10
+/- 0.15
0.472
0.393
+/- 0.006
108 (7.4)
541 (37.3)
3-1/2
14
12
+/- 0.15
0.551
0.472
+/- 0.006
92 (6.3)
459 (31.6)
4
16
14
+/- 0.15
0.63
0.551
+/- 0.006
80 (5.5)
398 (27.4)
5-1/2
FEP Metric Sizes, O.D. 4mm, I.D. 2mm
O.D. (mm):
4
I.D. (mm):
2
O.D./I.D.
Tolerance (mm):
+/- 0.11
O.D. (in):
0.157
I.D. (in):
0.078
O.D./I.D.
Tolerance (in):
+/- 0.004
Working Pressure*
PSIG (bar):
360 (25)
Burst Pressure+
PSIG(bar):
1800 (124)
Minimum Bend Radius (in):
1/2
FEP Metric Sizes, O.D. 5mm, I.D. 3mm
O.D. (mm):
5
I.D. (mm):
3
O.D./I.D.
Tolerance (mm):
+/- 0.11
O.D. (in):
0.197
I.D. (in):
0.118
O.D./I.D.
Tolerance (in):
+/- 0.004
Working Pressure*
PSIG (bar):
282 (19)
Burst Pressure+
PSIG(bar):
1412 (97.4)
Minimum Bend Radius (in):
1/2
FEP Metric Sizes, O.D. 6mm, I.D. 4mm
O.D. (mm):
6
I.D. (mm):
4
O.D./I.D.
Tolerance (mm):
+/- 0.13
O.D. (in):
0.236
I.D. (in):
0.157
O.D./I.D.
Tolerance (in):
+/- 0.005
Working Pressure*
PSIG (bar):
231 (16)
Burst Pressure+
PSIG(bar):
1154 (79.6)
Minimum Bend Radius (in):
1/2
FEP Metric Sizes, O.D. 7mm, I.D. 5mm
O.D. (mm):
7
I.D. (mm):
5
O.D./I.D.
Tolerance (mm):
+/- 0.13
O.D. (in):
0.276
I.D. (in):
0.197
O.D./I.D.
Tolerance (in):
+/- 0.005
Working Pressure*
PSIG (bar):
195 (13)
Burst Pressure+
PSIG(bar):
973 (67.1)
Minimum Bend Radius (in):
1-3/4
FEP Metric Sizes, O.D. 8mm, I.D. 6mm
O.D. (mm):
8
I.D. (mm):
6
O.D./I.D.
Tolerance (mm):
+/- 0.13
O.D. (in):
0.315
I.D. (in):
0.236
O.D./I.D.
Tolerance (in):
+/- 0.005
Working Pressure*
PSIG (bar):
168 (11.6)
Burst Pressure+
PSIG(bar):
840 (57.9)
Minimum Bend Radius (in):
1-3/4
FEP Metric Sizes, O.D. 9mm, I.D. 7mm
O.D. (mm):
9
I.D. (mm):
7
O.D./I.D.
Tolerance (mm):
+/- 0.13
O.D. (in):
0.354
I.D. (in):
0.276
O.D./I.D.
Tolerance (in):
+/- 0.005
Working Pressure*
PSIG (bar):
148 (10.2)
Burst Pressure+
PSIG(bar):
738 (50.9)
Minimum Bend Radius (in):
2-1/2
FEP Metric Sizes, O.D. 10mm, I.D. 8mm
O.D. (mm):
10
I.D. (mm):
8
O.D./I.D.
Tolerance (mm):
+/- 0.13
O.D. (in):
0.393
I.D. (in):
0.315
O.D./I.D.
Tolerance (in):
+/- 0.005
Working Pressure*
PSIG (bar):
132 (9.1)
Burst Pressure+
PSIG(bar):
659 (45.4)
Minimum Bend Radius (in):
2-1/2
FEP Metric Sizes, O.D. 12mm, I.D. 10mm
O.D. (mm):
12
I.D. (mm):
10
O.D./I.D.
Tolerance (mm):
+/- 0.15
O.D. (in):
0.472
I.D. (in):
0.393
O.D./I.D.
Tolerance (in):
+/- 0.006
Working Pressure*
PSIG (bar):
108 (7.4)
Burst Pressure+
PSIG(bar):
541 (37.3)
Minimum Bend Radius (in):
3-1/2
FEP Metric Sizes, O.D. 14mm, I.D. 12mm
O.D. (mm):
14
I.D. (mm):
12
O.D./I.D.
Tolerance (mm):
+/- 0.15
O.D. (in):
0.551
I.D. (in):
0.472
O.D./I.D.
Tolerance (in):
+/- 0.006
Working Pressure*
PSIG (bar):
92 (6.3)
Burst Pressure+
PSIG(bar):
459 (31.6)
Minimum Bend Radius (in):
4
FEP Metric Sizes, O.D. 16mm, I.D. 14mm
O.D. (mm):
16
I.D. (mm):
14
O.D./I.D.
Tolerance (mm):
+/- 0.15
O.D. (in):
0.63
I.D. (in):
0.551
O.D./I.D.
Tolerance (in):
+/- 0.006
Working Pressure*
PSIG (bar):
80 (5.5)
Burst Pressure+
PSIG(bar):
398 (27.4)
Minimum Bend Radius (in):
5-1/2
* This tubing has a safety factor of 5 to 1 (ratio of burst pressure to working pressure). This data is to be used as a guideline only. You should perform actual tests according to your specific application.
+ The following equation is for calculating burst pressure. The result from this equation is to be used as a guideline only. The calculation is at ambient room temperature. It does not factor steam pressure, altitude, etc.
B=Burst Pressure
T=Tensile Strength Values: FEP-3000 psi PFA - 4000 psi PTFE - 2500 psi PVDF - 5000 psi ETFE - 6500 psi
1 bar = 14.504 ps
