Polyethylene under stress: Unique slow-motion footage of a CRB test

Ever seen a Cracked Round Bar (CRB) test? In this video, we showcase in slow motion how a polyethylene test specimen fails under cyclic loading. The CRB test is specifically designed to simulate the slow crack growth (SCG) process in polyethylene (PE) and delivers faster results than traditional methods such as PENT and FNCT.

Kiwa is a global expert in SCG testing and conducts the CRB test in accordance with ISO 18489. This test is performed at operating temperature and without accelerating agents such as detergents, making it highly representative of real-world conditions.

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Strain Hardening Test for PE 100 RC: rapid insight into SCG resistance

With the publication of CEN/TS 12201-7, the conformity assessment of PE pipes for water supply now also contains PE 100-RC. For PE 100 RC the Cracked Round Bar (CRB) Test, the Strain Hardening Test (SHT), the accelerated Full Notch Creep Test (aFNCT) and the accelerated Notched Pipe Test (aNPT) form part of the mandatory test program to assess the resistance to Slow Crack Growth (SCG). Together, these tests determine if the material may be called PE 100-RC.

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Want to learn more about independent material testing, such as our CRB and other SCG tests? Ask our experts!