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Position：Home >> News >> Select the method of sealing products News
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| Select the method of sealing products | | 发布者：admin 点击：1745 | Select the spiral wound gasket material depends primarily on the following three factors: temperature, medium pressure
Metal gasket material
1: Carbon
Recommended maximum working temperature does not exceed 538 ℃, especially when the medium has oxidizing time. High-quality thin steel sheet is not suitable for the manufacture of a mineral acid, neutral or acidic salt solution of the device, if the steel subjected to stress, the accident rate for the device under the conditions of the hot water is very high. Steel gasket typically used in many high-concentration alkaline solution and an acid. Brinell hardness of about 120.
2 :. 304
18-8 (18-20% chromium, nickel, 8-10%), the recommended maximum working temperature does not exceed 760 ℃. In the temperature range of -196 ~ 538 ℃, prone to stress corrosion and intergranular corrosion. Brinell hardness of 160.
3: 304L stainless steel
Not more than 0.03% carbon content. Recommended maximum working temperature does not exceed 760 ℃. 304 is similar to the corrosion resistance of stainless steel. Low carbon content reduces the carbon deposited from the lattice, the grain boundary corrosion resistance of stainless steel is higher than 304. Brinell hardness of about 140.
4: 316 stainless steel
18-12 (18% Cr, 12% Ni), an increase of about 2% Mo stainless steel 304, when the temperature increase their strength and corrosion resistance can be improved. When the temperature is increased higher than other ordinary stainless steel anti-creep properties. Recommended maximum working temperature does not exceed 760 ℃. Brinell hardness of about 160.
5: 316L stainless steel
Recommended maximum continuous operating temperature does not exceed 760 ℃ ~ 815 ℃. With respect to the carbon content of not more than 316 stainless steel has better resistance to stress and intergranular corrosion. Brinell hardness of about 140.
6:20 alloy
45% iron, 24% nickel, 20% chromium and small amounts of molybdenum and copper. Recommended maximum working temperature does not exceed 760 ℃ ~ 815 ℃. Particularly suitable for the manufacture of sulfuric acid corrosion-resistant equipment, Brinell hardness of about 160.
7: Aluminum
Al (content of not less than 99%). Aluminum has excellent corrosion resistance and processing properties, for the manufacture of double clamp pads. Brinell hardness of about 35. Recommended maximum continuous operating temperature does not exceed 426 ℃. |
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