Parameters:

1. Flange thickness: the thickness of square flanges is usually determined by the pressure level of the pipeline and equipment, the strength of the material, the temperature and the flow rate and pressure of the medium.

2. Bore diameter: the size of the bore of the square flange should be determined by the diameter of the connected pipes and equipment. Generally speaking, the aperture size should be the same as the pipe caliber.

3. Hole Pitch: The hole pitch of square flanges refers to the distance from the center of each hole to the center of the other hole. Commonly used hole spacing F, H, J and K, etc., of which hole spacing J is the most common standard hole spacing.

4. Outer diameter: the outer diameter of the square flange refers to the diameter of the outer circle of the flange. In the selection of the outer diameter, should consider the connecting rod as well as the flange extrusion pressure and support force.

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