ISO 3165:1976 Sampling of chemical products for industrial use; Safety in sampling
ISO 5940:1981 Carbonaceous materials for the production of aluminium; Pitch for electrodes; Determination of softening point by the ring-and-ball method
GOST R ISO 6257-2015 history
2015GOST R ISO 6257-2015 Carbonaceous materials used in the production of aluminium. Pitch for electrodes. Sampling