SPG is accredited by DAkks as a testing laboratory according to EN ISO/IEC 17025:2018-03 and an inspection body according to EN ISO/IEC 17020:2012-07. The testing laboratory accreditation naturally includes standards relating to creep and creep relaxation tests such as EN ISO 204:2009, EN 10319-2:2003 and ASTM E139-11.
145 creep testing machines are in use for test temperatures up to 950°C and static loads up to 20 kN. In order to achieve even higher test temperatures and more flexible load and temperature cycles, the existing testing machines were supplemented by four Kappa 50 LA-Spring creep testing machines by ZwickRoell. This enabled both creep and creep relaxation tests, including load and temperature blocks, to be performed. The testing machines are equipped with high-temperature furnaces (up to 1,200°C) and feature a nominal force of 50 kN. High-temperature extensometers are used for direct strain measurement on the specimen up to break, allowing determination of creep equations, for example. Control of the four testing machines is handled by a measuring computer; data is processed and stored on a central measured-value acquisition system.