華井氮化硅精密陶瓷由於本身具有的致密性，耐磨損性優越，因此也是低壓鑄造時保持壓力的封止管等相關零件的较合適的材料，並且同時保證高加工精度和高密閉性。 加之定期保養，可以使用數年。但如果操作不正確，對其不定期保養的話，可能會使之使用壽命減短。

Huajing silicon nitride ceramic has high density and abrasion resistance, it is most suitable material used for low pressure die casting. The stopper pipe has the most favorable properties of protectiveness, impermeability and excellent precision.

The life time of the stopper pipe can be used for many years if keeping regular maintenance. Otherwise, incorrect operation and less attention to a maintenance will reduce the life time.