This paper introduces the calculation methods of pressure temperature rating for ASTM materials using in power station valves,and also introduces the relations between pressure and class for high pressure and high temperature power station valves

• 介绍了电站阀门用ASTM材料的压力温度等级的计算方法及常用高温高压电站阀门压力温度等级与磅级制阀门的关系