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 specified period or until they fail. The test duration is subject to the tension generated by the internal pressure and the temperature. The IPT test ovens are specially designed for testing thermoplastic pipes and fittings. The high reliability, long service life of the materials used and the constant temperatures in the test oven with respect to both volume and time provide particularly reliable test conditions. The efficient use of energy with low servicing and maintenance costs guarantees efficient longterm operation. There are a wide range of connection options, enabling the ovens to be flexibly adapted to various operating conditions.