Definite Value and Application of Apparent Viscosity of Polyethylene Pipe Material for Internal Quality Control Samples in Laboratory

The pellets of polyethylene pipe material were selected as samples, then the particle size was screened. In accordance with the method in CNAS-GL03, the homogeneity and stability of samples were tested, and the testing data was fixed. According to the requirements of the method in GB 3359-1982, the statistical tolerance interval of a single measurement was given. The results showed that the nominal viscosity values of polyethylene pipe material for internal quality control sample in laboratory were (2 140.13 ± 41.84) Pa·s.