Double Containment Tubing

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Zeus provides high-quality Double Containment tubing, a material of choice in semiconductor, critical fluid, and other industries that require low levels of chemical extractables and high continuous service temperature.

In addition to our high performing conventional tubing, Zeus offers Industry Standard Double Containment tubing (also called Dual Containment tubing). This “tube-within-a-tube” configuration prevents the introduction of contaminants during installation and allows for long continuous lengths to be maintained without the need for welding or heat bending.

This high-purity tubing has an inner tube of High Purity (HP) PFA surrounded by an outer tube of FEP for protection from potential hazardous fluid leaks. Double Containment tubing offers low gas permeability, high mechanical strength at elevated temperatures, and is resistant to nearly all common solvents.

Our Double Containment tubing exceeds the stringent requirements of the SEMI F57 specification. We also offer a wide array of semiconductor industry standard and custom sizes as well as options for material combinations.

Our capabilities include manufacturing standard Double Containment tubing in sizes ranging from 0.047″ (1.194 mm) to 0.063″ (1.600 mm) wall and 0.25″ (6.35 mm) outside diameter (OD) to 1.25″ (31.75 mm) OD. This product is end capped and clean room packaged. Our Dual Containment tubing can also be provided with other special options including pre-cut spool lengths, custom laser markings, private labeling, and special packaging.

Contact us or call toll-free in US 1-800-526-3842 or +1-803-268-9500 internationally to find out how you can use Zeus Double Containment Tubing.


    Critical Fluids – For fluid management, Dual Containment tubing offers an added level of protection against leaks and as well as permeation of gases and ionic contaminants.

    Semiconductor – The extremely low levels of chemical extractables of Zeus Dual Containment tubing drive its popularity in the semiconductor industry. In addition, this product has continuous service temperature down to -320 °F (-195 °C).


    Chemically resistant to all common solvents – For critical fluids management, tubing with superior chemical resistance is a key. Zeus Dual Containment is resistant to almost all common solvents.

    Excellent surface smoothness – The highly lubricious nature of both the PFA and FEP means that this tubing product is easy to place into position within your application and allows for easy manipulation of the individual tubes.

    Flame resistant: UL 94 V-0 – Zeus Dual Containment tubing is flame resistant and meets UL 94 V-0 criteria.

    Low gas permeability – Both FEP and PFA have substantially lower permeation to gases than most other plastics making this product a good option where gas permeation is a concern.

    Maintains mechanical strength at high temperatures – FEP and PFA have maximum service temperatures of at least 392 °F (200 °C) allowing for broad flexibility for the application environments.

    Protection against ionic contamination – Should your tubing be exposed to external environments where there are harsh ionizing chemicals, Dual Containment tubing protects not only the fluid component, but also the tubing’s non-reactive chemical nature resists being eroded by the chemicals. Likewise, the reverse is true where the inner layer of the Dual Containment tubing is inert to the fluid flowing through it and thus prevents potential erosion or chemical etching of the inside diameter of the tubing.

    SEMI F57 certified material – This standard delineating the criteria for polymer materials and components used in ultrapure water and liquid chemical distribution systems has been approved by Liquid Chemicals Global Technical Committee. Thus, with Zeus’ certified materials, you know exactly what you are getting.

    Superior high purity properties – With the high degree of purity of the polymer components of Dual Containment tubing, you can have equally high confidence that this product will not adversely affect your critical fluids management.

    Thermal stability – Zeus Dual Containment tubing can operate in temperatures from -328 °F to 392 °F (-200 °C to 200 °C) giving it a wide range of temperature functionality.

    Ultra-low metallic and organic extractables – Coming from the tubing itself, these unwanted chemical entities can attack the tubing wall to degrade it while simultaneously contaminating the fluid. Zeus Dual Containment tubing offers protection against these types of contaminants.

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  • Capabilities / Sizing

    Physical Properties Test Method PFA
    Continuous Service Temp. Range -320°F TO 500°F
    Hardness, Shore D ASTM D2240 55-64
    Tensile Strength, Ultimate ASTM D638 3630-4100 PSI
    Tensile Strength, Yield ASTM D638 2180-4100 PSI
    Elongation at Break ASTM D638 300%
    Tensile Modulus ASTM D638 10-90 KSI
    Flexural Modulus ASTM D790 80-95 KSI
    Izod Impact, Notches ASTM D256 >1.2
    Coefficient of Friction ASTM D1894 0.21
    PFA & FEP Tubing – Properties
    Polymer Elongation (ASTM D638) Tensile Strength (ASTM D638) Flexural Modulus (ASTM D790) Max Service Temperature Min Service Temperature Chemical Resistance Coefficient of Friction (ASTM D1894)
    FEP 300-380% 91 Mpa 0.5 Gpa 392°F/200°C -400°F/-240°C excellent 0.005
    PFA 340-400% 19-39 Mpa 0.5-0.6 Gpa 500°F/260°C -450°F/-268°C excellent 0.2
    HP PFA* Tubing – Standard Sizes
    Line OD (inches) OD Tolerance (inches) Wall (inches) Wall Tolerance (inches) BURST PRESSURE** (PSI @ 72°F)
    Primary 1/4 +/- 0.005″ 0.047 +/- 0.005″ 1600
    Secondary Containment 1/2 +/- 0.005″ 0.063 +/- 0.005″ 1050
    Primary 1/2 +/- 0.005″ 0.063 +/- 0.005″ 1050
    Secondary Containment 3/4 +/- 0.005″ 0.063 +/- 0.005″ 700
    Primary 3/4 +/- 0.005″ 0.063 +/- 0.005″ 700
    Secondary Containment 1 +/- 0.006″ 0.063 +/- 0.007″ 525
    Primary 1/2 +/- 0.005″ 0.063 +/- 0.005″ 1050
    Secondary Containment 1 +/- 0.006″ 0.063 +/- 0.007″ 525