time shutdown

The process of temperature decrease is the key to determine the safe time of shutdown in the whole pipeline due to overhead pipeline without soil thermal storage to slow up heat dissipation.

由于架空原油管道没有土壤的蓄热来减缓管内原油的热散失，架空原油管道的温降过程往往成为决定整条管道允许停输时间的关键。

Congelation Risk Assessment and Maximum Allowable Time of Shutdown Research for Heated Crude Oil Pipelines

热油管道凝管风险评价与安全停输时间研究

Automatically shutdown your computer after long time conversion, such as for big files conversion at midnight.

自动关机后,您的电脑很长一段时间的转换, 如大文件的转换在午夜.

The second is choosing reasonable startup or shutdown style, control every target in safe range at the same time of acceleration through improving operational procedure.

第二是选择合理的启停方式，通过改进操作程序，在加快启停速度的同时，控制各项指标在安全范围之内，实现优化启停。

Taking Chengdao Oil Field as an example, the methods for calculating the shutdown time, temperature dropping and restart pressure of submarine pipeline are introduced.

以埕岛油田为例，介绍海底管线停输时间及再启动压力的计算方法。

During task. ( 3) suitable protection must be taken during the time of shutdown.

执行任务时教师要督促任务的进程并对学生表现作以评价。（3）停运期间采取适当的保护。

The results of calculation indicate that the safety margin of pipeline shutdown relates not only to the product and the atmosphere temperature, but also to the initial time of pipeline shutdown.

计算结果表明：安全停输时间不仅与油品温度、大气温度有关，而且还与起始停输时间点有关；

The change of the atmosphere temperature and the initial time of pipeline shutdown which affect the safety margin of pipeline shutdown is considered in the calculation first time.

计算过程考虑了大气温度变化和起始停输时间点对安全停输时间的影响。

Suitable protection must be taken during the time of shutdown.

停运期间采取适当的保护。

The oil reservoir shall act as a barrier to trap moisture and provide sufficient time for a planned shutdown in the event of an outer seal failure.

贮油器应该在外部密封失效、设备关闭的一段时间内具有防潮屏障的功能。

Reduce the shutdown time of production caused by malfunction.

减少设备由于故障而造成的停机时间.