tunnel-segment-gaskets-quality

Quality & Regulations

Quality System

  • ISO 9001:2008
    International quality management system
  • CE Marking
    Declaration of performance compliant with 305/211 Regulation

Regulation on product

  • EN 681-1:1996
    Material requirements for pipe joint seals used in water and drainage applications
  • STUVA Recommendations
    For Testing and Application of sealing Gaskets in segmental Linings
  • ISO 3302-1 2014
    Specification for dimensional tolerances
  • ISO 2230:2002
    Guidelines for storage

Material properties

Property Method Unit Specified value
Hardness (Micro) ISO 48 IRHD 65 ± 5
Tensile strength ISO 37 MPa 9 min.
Elongation at break ISO 37 % 200 min.
Compression set 72 hours / 23 ºC ISO 815 % 15 max.
Compression set 24 hours / 70 ºC ISO 815 % 20 max.
Compression set 72 hours / -10 ºC ISO 815 % 50 max.
Heat ageing 7 days / 70ºC ISO 188
Hardness change +8º / -5º
Tensile strength change % -20 max.
Elongation at break change % +10 / -30
Stress relaxation 7 days / 23ºC ISO 3384 % 16 max.
Stress relaxation 100 days / 23ºC ISO 3384 % 23 max.
Stress relaxation per logarithmic decade ISO 3384 % 6,3 max.
Water absorption 7 days / 70 ºC ISO 1817 % +8 / -1
Ozone resistance ISO 1431-1 No cracking

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