ISO 12162:1995 Thermoplastics materials for pipes and fittings for pressure applications - Classification and designation - Overall service (design) coefficient
ISO 3:1973 Preferred numbers; Series of preferred numbers
GOST ISO 161-1-2004 history
2019GOST ISO 161-1-2019 Thermoplastics pipes for the conveyance of fluids. Nominal outside diameters and nominal pressures. Part 1. Metric series
2004GOST ISO 161-1-2004 Thermoplastics pipes for the conveyance of fluids. Nominal outside diameters and nominal pressures. Metric series