This standard specifies the classification and requirements for marine cast iron flanges (hereinafter referred to as flanges) used on ship piping accessories and mechanical equipment bodies. This standard applies to nominal pressure PN6, PN10 and PN16 marine cast iron flanges.
CB/T 4325-2013 Referenced Document
CB/T 4196 Marine pipe flanges-connection dimensions and mating face
GB/T 1804-2000 General tolerances Tolerances for linear and angular dimensions without individual tolerance indications