原文：
            国内常用的燃气分为四种：天然气、液化气、人工煤气和液化气与空气的混合气，其中天然气的腐蚀性最小，液化气次之，电站阀门腐蚀性最大的是人工煤气，人工煤气中的有害物质主要是二氧化硫、萘、煤焦油等。 天然气用阀门的材料可以没有特殊要求，锻钢阀门如果使用了普通碳钢，一定做表面处理防止锈蚀。然而在人工煤气用阀门上最好不要使用普通铜材，针型阀它和二氧化硫遇水后变成硫酸铜，对零件的腐蚀很大。要说明的是；人工煤气在阀门、衬里阀门管道上非常容易结萘，是一种白色的结晶，很硬，不容易除掉，影响阀门的关闭和开启。煤焦油粘呼呼的在阀门、管道内到处都是，非常难清理。目前，没有很好的办法解决。 人工煤气用阀门的阀体压力低的可以使用铸铁，低温阀门压力中等的可以使用球墨铸铁、压力高的可以使用铸造不锈钢（316）。最好不要使用普通铸钢。气动调节阀的橡胶膜片腔壳体最好不要用钢板冲压结构，非要用的，内部要做比较高级的表面处理（如：镍磷化学镀等）。

“ What materials to use gas valve ”是由中国过滤器网提供的国际阀门新闻，译文仅供参考。另外，中国过滤器网还提供相关产品搜索： SY4P法兰连接Y型过滤器、 Y型拉杆伸缩过滤器(YSTF)、 SRB系列篮式过滤器、 SB14/ST34法兰连接T型过滤器、 ZPG系列自动排污反冲洗过滤器等。

译文：
           Gas commonly used in China is divided into four types: natural gas, liquefied petroleum gas, artificial gas and liquefied Cast Gate, Globe, Check Valvespetroleum gas and air mixture, in which the minimum corrosion of natural gas, liquefied second, and corrosion is the biggest artificial gas, artificial gas Ball Valvesin hazardous substances are mainly sulfur dioxide, naphthalene, coal tar, etc.. Gas valve materials with no special requirements can, if you use a common carbon steel, some do surface treatment Forged Gate, Globe, Check Valvesto prevent corrosion. However, the best artificial gas valves do not use ordinary copper, which, after contact with water into a copper sulfate and sulfur dioxide, the corrosion of the great parts. To show that; artificial gas in the valve, the pipe is very easy to end Naphthalene is a white crystalline, Automatic Control Valvesvery hard, not easy to remove, affect the closing and opening the valve. Stick the whirring of coal tar in valves, tubes everywhere, very hard to clean up. Currently, there is no good solution. Artificial gas with low pressure valve body can use cast iron, ductile iron pressure medium can be used, use high pressureResilient Seated Gate Valves casting of stainless steel (316). Best not to use ordinary steel. Rubber diaphragm pneumatic valve chamber shell is best not to use steel stamping structure, insist with the internal need to do more advanced surface treatment (such as: nickel-phosphorus plating, etc.).

原文来源：http://www.1guolvqi.com/

2010-08-30 08:53

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