Short-term flexural modulus is one of the primary CIPP liner testing properties used in the design of a pipe liner. Tangent modulus is used to characterize the ASTM F1216 testing properties of a material loaded in bending. We are fully conversant with and capable of performing all American (ASTM), European (EN) and Quebec (BNQ) test procedures.
Paragon Systems introduced the ASTM D2290 Apparent Tensile test to the pressure pipe lining industry. The method provides a technique for more readily measuring the 90 deg orientation tensile properties on liners where the hoop direction properties prevail.
Wall thickness is another critical liner property which is used to determine conformance to a liner design. We’ve tested dozens of different liner designs and are familiar with American (ASTM), European (EN) and Quebec (BNQ) test procedures for measuring liner thickness.
The principle benefit of CIPP liners is the 50 to 75 year life extension that the material provides. The life extension for sewer liners is predicated on long term creep testing of the specific resin chemistry used. Spectral analysis of a CIPP liner resin sample taken during installation of the liner can be compared to the “fingerprint” of the resin used for the original creep testing to confirm that the correct resin is being installed.
Download peer reviewed CIPP liner testing papers