FNCT is a method of determining the stress cracking resistance of polyethylene materials in any Environment.The test is carried our on notched test specimens cut from compression-moulded sheet or finished products, as applicable.

The test specimen is subjected to a static tensile load when immersed in an Environment such as a surfactant solution held at a specified temperature and the time to failure measured.This method has been specifically developed for polyethylene materials but can be used to evaluate PE extrusions, such as pipe segments, PE fusion welds/fittings and blow-moulded PE containers to study the effect of aggressive envioments.