Sampling inspection principle of porcelain ball
Alumina ball products must be inspected by the factory before they leave the factory. 50 tons of products of the current specifications made under the same conditions of raw materials, processes and equipment shall be counted as one batch, and less than 50 tons shall be counted as one batch. Each batch of products should be sampled in a representative and random manner. According to different specifications of the product. Different quantities of samples are drawn according to table.
The samples were mixed evenly, and a quarter of them were extracted by the method of quarter for appearance quality and dimension inspection, and the corresponding quantity was taken from them for physical and chemical performance test