There are many standards for flange gaskets. Guangdong Zhongxiang can customize them according to the physical and chemical characteristics of the medium and the pressure level. Besides, everyone knows that flange gaskets include asbestos rubber gaskets, metal gaskets, four[fú] gaskets, aluminum gaskets, toothed gaskets, stainless steel gaskets, metal winding gaskets, annealed copper gaskets, etc. according to the nature of the material industry. Sealing products. Each flange gasket has its own standards in various industries and applications.

Such as the standard of flange gasket of rubber material

Tian [ran] rubber is suitable for water, sea water, air, inert gas, alkali, saline solution and other media, but it is not resistant to mineral oil and non-[jí] solvents. The long-term use temperature does not exceed 90°C, and it has excellent low temperature performance. It can be used above -60°C.

Butadiene [nitrile] rubber is suitable for petroleum, petroleum, lubricating oil, fuel oil and other petroleum products. The long-term use temperature is 120°C. For example, it can withstand 150°C in hot oil and the low temperature is -10 to -20°C.

[lǜ] Butadiene rubber is suitable for seawater, weak acid, weak alkali, salt solution, excellent (color) resistance to [oxygen] and ozone aging, and oil resistance of [nitrile] rubber is better than others. For rubber, long-term use The temperature is lower than 90°C, [zuì] high use temperature is lower than 130°C, [zuì] low temperature is -30?-50°C.

[fú] There are many types of rubber, they have good acid resistance, oxidation resistance, oil resistance and solvent resistance. Medium and certain oils and solvents can be found in almost all acids, and the long-term use temperature is below 200°C.

The rubber plate is used as a flange gasket, which is mainly used for pipes or frequently disassembled manholes, hand holes, and the pressure is not more than 1.568mpa. Due to various flange sealing gaskets, rubber gaskets are relatively soft, have good assembly performance, and have better sealing, and can play a sealing role under a small pre-tightening force. Therefore, unlike some material flange gaskets, they are easily squeezed out due to the thick or low hardness of the gasket under the internal pressure of the bearing.

When the rubber sheet is used in benzene, ketone, ether and other [organic] solvents, it is prone to swelling, weight gain, softness, and stickiness, resulting in seal failure. Generally, [zhǒng] will not be usable if the temperature exceeds 30%.

Under low pressure (especially at 0.6mpa pressure) and vacuum conditions, rubber pads are more suitable. Rubber material has good compactness and low permeability [] permeability. For example, [fú] elastomer is more suitable for flange rubber gaskets for vacuum vessels. The vacuum degree reaches 1.3×10-7Pa. When used in the vacuum range of 10-1~10-7Pa, the rubber pad needs to be baked and suctioned.