GB/T 9575-2003 Rubber and plastics hoses for general--Purpose industrial applications-Bore diameters and tolerances,and tolerances on length (English Version)
This standard specifies the preferred internal diameter dimensions and tolerances and length tolerances for rubber and plastic hoses for industrial use. This standard applies to articles that do not list their own specific diameters and tolerances. This standard does not apply to hydraulic and automotive rubber and plastic hoses.
GB/T 9575-2003 history
2013GB/T 9575-2013 Rubber and plastics hoses.Hose sizes,minimum and maximum inside diameters,and tolerances on cut-to-length hoses
2003GB/T 9575-2003 Rubber and plastics hoses for general--Purpose industrial applications-Bore diameters and tolerances,and tolerances on length