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RELATED INFORMATION:

  • Tygon Physical Properties
  • Plastic Tubing & Hose Chemical Resistance
  • Temperature Correction Factors

 

TECHNICAL NOTES
HOW TO CALCULATE WORKING PRESSURES FOR TYGON TUBING
 

Maximum working pressure of Tygon tubing varies with different formulations. In addition, the working pressure is affected by temperature and three other factors:

  1. SIZE AND WALL THICKNESS. Working pressure increases as wall thickness increases realtive to bore size.
  2. TIME. If pressure exceeding the maximum working pressure is maintained overa period of time, tubing will gradually swell, and eventually rupture.
  3. MATERIAL TRANSMITTED. Tygon tubing can handle almost any material over short periods of time. However, prolonged exposure to these substances tends to cause swelling and loss of normal tensile strength.

The "Working Pressures" chart below contains maximum pressures, at room temperature, for various sizes of Tygon tubing formulations. Multiply "Maximum Suggested Working Pressure" shown inthe chart by the appropriate factor:
 
  • S-50-HL value x 0.90
  • B-44-4X value x 1.00
  • R-3400 value x 1.05
  • F-4040-A value x 0.80
  • R-1000 value x 0.30
  • R-3603 value x 0.70
  • Fluran® F-5500-A value x 0.30
    		•
     

    TYGON TUBING WORKING PRESSURES

    Inside
    Diameter
    (in.)

    Outside
    Diameter
    (in.)

    Wall
    Thickness
    (in.)

    Max. Suggested
    Working Pressure
    at 73° F (psi)
    1/16
    3/16
    1/16
    106
    3/32
    7/32
    1/16
    78
    1/8
    1/4
    1/16
    62
    5/32
    9/32
    1/16
    52
    3/16
    5/16
    1/16
    45
    1/4
    3/8
    1/16
    36
    5/16
    7/16
    1/16
    30
    3/8
    1/2
    1/16
    26
    7/16
    9/16
    1/16
    23
    1/2
    5/8
    1/16
    20
    3/16
    3/8
    3/32
    62
    1/4
    7/16
    3/32
    49
    5/16
    1/2
    3/32
    41
    3/8
    9/16
    3/32
    36
    7/16
    5/8
    3/32
    31
    1/2
    11/16
    3/32
    28
    9/16
    3/4
    3/32
    26
    5/8
    13/16
    3/32
    24
    11/16
    7/8
    3/32
    22
    3/16
    7/16
    1/8
    78
    1/4
    1/2
    1/8
    62
    5/16
    9/16
    1/8
    52
    3/8
    5/8
    1/8
    45
    7/16
    11/16
    1/8
    39
    1/2
    3/4
    1/8
    36
    9/16
    13/16
    1/8
    32
    5/8
    7/8
    1/8
    30
    11/16
    15/16
    1/8
    28
    3/4
    1
    1/8
    26
    7/8
    1-1/8
    1/8
    23
    1
    1-1/4
    1/8
    20
    1-1/8
    1-3/8
    1/8
    19
    1-1/4
    1-1/2
    1/8
    17
    		 

    Inside
    Diameter
    (in.)

    Outside
    Diameter
    (in.)

    Wall
    Thickness
    (in.)

    Max. Suggested
    Working Pressure
    at 73° F (psi)
    1/2
    13/16
    5/32
    42
    9/16
    7/8
    5/32
    39
    5/8
    15/16
    5/32
    36
    11/16
    1
    5/32
    33
    3/4
    1-1/16
    5/32
    31
    7/8
    1-3/16
    5/32
    27
    1
    1-5/16
    5/32
    24
    3/4
    1-1/8
    3/16
    36
    1
    1-3/8
    3/16
    28
    1-1/8
    1-1/2
    3/16
    26
    1-1/4
    1-5/8
    3/16
    24
    1-1/2
    1-7/8
    3/16
    20
    3/4
    1-1/4
    1/4
    45
    1
    1-1/2
    1/4
    36
    1-1/4
    1-3/4
    1/4
    30
    1-1/2
    2
    1/4
    26
    1-3/4
    2-1/4
    1/4
    23
    2
    2-1/2
    1/4
    20
    2-1/4
    2-3/4
    1/4
    19
    2-1/2
    3
    1/4
    17
    3
    3-1/2
    1/4
    15
    2
    2-3/4
    3/8
    28
    2-1/2
    3-1/4
    3/8
    24
    3
    3-3/4
    3/8
    20
    2
    3
    1/2
    36
    3
    4
    1/2
    26
    4
    5
    1/2
    20

     
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