用于具有耐火结构的阀门在耐火试验之后的承压性能测试
适用口径:公称尺寸≤DN400
Suitable diameter: nominal size of less than DN400
适用压力:公称压力≤25MPa
Application of pressure: nominal pressure is less than 25MPa
结构要求:具有耐火结构
Structural requirements: fire resistant structure