Basic Flange Parameters

1. Flange Diameter
The flange diameter refers to the outer circular diameter of the flange and is a very important parameter when assembling flanges. Common flange diameters include DN15, DN20, and DN25, where "DN" stands for nominal diameter, representing the flange's inner diameter.
2. Number of Flange Holes
The number of flange holes refers to the number of holes in the flange, used to connect two flanges together with fasteners such as bolts and nuts. Typically, the number of flange holes is an even number, with 4 or 8 being common.
3. Flange Aperture
The flange aperture refers to the diameter of the flange holes and is one of the parameters that determines the specifications of the fasteners. Flange apertures vary depending on the flange's pressure rating, typically ranging from 5mm, 8mm, and 10mm.
4. Flange Thickness
Flange thickness refers to the thickness of the flange, which also affects the flange's pressure-bearing capacity. Generally, high-pressure flanges are thicker, while low-pressure flanges are relatively thin, typically around 15mm. 5. Flange Valve Spacing
Flange valve spacing refers to the distance between two valves connected by flanges and is typically measured based on specific applications. Generally, flange valve spacing depends on factors such as flange size and fastener dimensions.
6. Flange Material
Flange material refers to the material used for the flange, typically including carbon steel, stainless steel, cast iron, and other materials. The appropriate material and specifications should be selected based on the specific application.
Summary: The above is a detailed introduction to flange dimensional parameters. By understanding these dimensional factors, you can better select the flange that suits your needs.