1. For conventional size, you can refer to the metal wound gasket standards, such as HG/T20610-2009 (Ministry of Chemical Industry standard) and HG/T20631-2009 (American standard), these two standards are commonly used standards for metal wound gaskets, the specific specifications The size corresponding to the model can refer to the implementation standard, but each specification is not only one size. For example, the pressure is different, the size of the gasket of the same specification is different; the implementation standard is different, the inner and outer diameters of the gasket are also different. The metal wound gasket should be selected according to the implementation standard and pressure of the flange, such as hHG/T20610-2009 standard, the flange is dn200-16, the inner and outer diameter of the gasket should be 200-16=222*273, then the method The flange is dn200-25, the inner and outer diameter of the gasket should be 200-25=222*284, so if a 16 kg flange is equipped with a 25 kg gasket, it cannot be used and cannot be installed.
The size of the gasket is different depending on the flange surface. The flange has tongue and groove surface, concave-convex surface, full plane, protruding table surface, etc.; For flanges, the gasket size is 34*57; for example, the flange with a raised table flange DN25-16, the inner and outer diameter of the gasket is 34*71, all of which are DN25-16, but the size is different, we are not sure before purchasing Flange parameters, be sure to verify the size of the metal wound gasket, you can also consult us, here I will not list the size of each gasket for you one by one, you can use the method I told you to understand the metal winding in detail before purchasing Gasket size, check and purchase after comparison.
3. Special-shaped size, because we may use special-shaped flanges due to special working conditions, such as the same DN32 flange, the size may be changed before ordering the flange, then we cannot refer to it before purchasing To implement the standard pressure size, inform the supplier before ordering, the size of the gasket used, i.e. inner diameter * outer diameter * thickness, and in another case, for example, it is not used on flanges, but used in other parts, Just be sure to confirm the size before ordering.
