The internal pressure creep test is a test procedure for determining the strength of thermoplastic pipes. The samples are subjected to a constant hydrostatic internal pressure at a constant ambient temperature either for a specifi ed period or until they fail. The test duration is subject to the tension generated by the internal pressure and the temperature. The 1774 Airless model is the most innovative development in state-of-the-art internal pressure creep testers. Its compact design, flexibility and precision remain unparalleled.