When the application is more critical, and the sealingcompound may fail due to high heat or pressure, NPTF Dryseal threads are used.
当密封要求严格时，密封剂可能由于高温高压会失效，这时可以采用NPTF干密封螺纹。
2
As special function is required, the construction of polysulfide sealingcompound turns into a key procedure in project of a sewage treatment plant.
由于特殊功能要求，聚硫密封膏的施工成为某污水处理厂工程的关键工序。
3
The testing result shows that sealingcompound performance is good, costs are low, and is suitable for static seal of pipe line and valve under different temperature conditions.