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Hoek Cell Membrane

The Hoek Cell Polyurethane Membrane is a specialized elastic sleeve designed for use in rock triaxial compression testing systems. It is installed inside a Hoek-type triaxial pressure cell to isolate the rock specimen from the confining fluid while allowing uniform pressure to be applied around the sample. These membranes are manufactured from high-performance polyurethane elastomer, offering superior tear resistance and durability compared with traditional latex membranes. They are widely used in geotechnical laboratories, universities, and rock mechanics research institutes for testing cylindrical rock core specimens.
Applicable Testing Standards
Hoek Cell membranes are used in laboratory systems designed according to international rock testing standards, including:

  • ASTM D7012.

  • ISRM Suggested Methods.

  • ISO 17892.


    These standards are commonly followed in rock triaxial compression and confining pressure tests.
Material Advantages The membrane is manufactured from polyurethane elastomer, which provides several advantages: High tear resistance Excellent elastic recovery Strong pressure resistance Long service life Good chemical resistance to laboratory fluids Compared with standard latex membranes, polyurethane membranes are more durable during repeated high-pressure testing cycles.
D.C.D.M.A.(Diamond Core Drilling Manufacturer Association)
Core Diameter

Core Diameter (inch)

Recommended Membrane ID
Typical Membrane Length
AX
30 mm
1.18 in
31–32 mm
60-70 mm
1.5 inch core
38 mm
1.50 in
39–40 mm
70–80 mm
BX
42 mm
1.65 in
43–44 mm
80-90 mm
NX
54.7 mm
2.16 in

56 mm

130 mm

HQ
63.5 mm
2.50 in
62 mm
180 mm
Custom
As required
Custom
Custom

Thickness 2.0-2.5mm

Typical Applications Hoek Cell membranes are mainly used for:

Rock triaxial compression testing Confining pressure testing of rock cores Elastic modulus measurement of rock specimens Laboratory research in rock mechanics and geotechnical engineering

High tear resistance

Compatibility These membranes are compatible with Hoek-type triaxial pressure cells used in rock mechanics laboratories, including systems supplied by major testing equipment manufacturers. Typical compatible equipment includes: Hoek Triaxial Cells Rock Triaxial Compression Systems Laboratory Rock Mechanics Testing Frames

Excellent elastic recovery

All membranes are manufactured under strict quality control procedures to ensure: Consistent thickness Uniform elasticity Reliable sealing during testing Each batch is inspected to ensure the membrane performs reliably under laboratory confining pressures.

Strong pressure resistance

Custom membranes can be produced according to customer drawings or sample specifications. Available options include: Custom diameter Custom length Different thickness levels Special material formulations This allows the membrane to match specific Hoek Cell pressure chamber designs used in different laboratories.

Long service life

Professional manufacturing experience in geotechnical testing membranes Support for custom laboratory equipment sizes Stable quality suitable for research laboratories and universities Global supply to Europe, North America, and research institutions

Common Questions

Most Popular Questions

Thickness and Diameter Options: We offer latex membranes in various thicknesses, including 0.3mm,0.635mm,1.0mm,2.0mm,3mm and more , with diameters ranging from 1.4 inches to 6 inches, suited for different specimen sizes in triaxial and permeability tests..

Our membranes are designed to meet ASTM standards, specifically ASTM D2850 and D4767, ensuring they are suitable for professional soil testing requirements.

Yes, we can provide technical data sheets for review and offer samples upon request to verify quality..

We offer customization options, including different shapes, drainage holes, and specific dimensions. We collaborate closely with our design team to meet unique testing requirements.

Custom designs may require a minimum order quantity, depending on complexity, with pricing based on the specifics of the customization. Feel free to share details, and we’ll provide a tailored quote.

Our quality control includes rigorous inspection at multiple production stages, and we conduct performance tests to confirm durability, elasticity, and non-porosity..

We typically work with flexible payment terms for bulk orders and may offer discounts based on volume. Please inquire for specific terms that suit your purchasing requirements.

Standard orders are typically fulfilled within 1-2 weeks, while customized orders may take slightly longer depending on specifications.

In the rare event of a quality issue, we offer replacement or refund options based on the specifics of the case.

Our team is available to answer any questions post-purchase and provide support to ensure optimal product performance.

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