ISO 6164:2018(en) flange, is one type of hydraulic flanges, covers complete dimensional specifications for
flange o-ring size chart,
flange o-ring groove dimensions.
ports and mounting surfaces
ISO 6164 flange is applicable to four-screw, one-piece square flange clamp type tube connectors and hose fittings for use at a pressure of 42 MPa [420 bar1].
Contents as follows:
2 Normative references
3 Terms and definitions
5 Selection criteria
7 Corrosion protection
8 Pressure/temperature requirements
10 Designation of flange connections and their parts
Annex A Assembly procedures and screw torque levels for flange connections conforming to this document
Annex B O-ring designation codes and dimensions
This second edition cancels and replaces the first edition (ISO 6164:1994), which has been technically revised.
https://www.jiayuanfitting.com/standards-info-pdf-download for your standards info.