7.1 Preventive Maintenance Scope   预防性维护范围
For A and B ranked equipments, the maintenance mitigations are identified in FMECA’s and the general equipment type maintenance strategies. Preventive maintenance activities also cover the C ranked equipment as manufacturer recommendations and people experiences.
对于A级和B级设备，维护性的缓解措施在FMECA和普通型设备维护策略中指定。预防性维护活动的对象，还包括C级设备，具体按制造商的推荐和工作人员经验来规定。
The mitigations can be grouped into three separated maintenance approaches. One is Preventative Maintenance, the second is Predictive Maintenance and the third is Corrective Maintenance.
缓解技术可以划分为三种单独的维护方法。其一是预防性维护，其二是预测性维护，其三是纠正性维护。
Some maintenance activities will be used in First-line Maintenance if the maintenance activities are considered as within the duties of Operator Routines which can be performed by human senses or no data collection is required when some simple tools are used. No scheduled maintenance work orders to support these activities except for execution of the First- Line Maintenance and Operator Routines.
有些维护活动可以用在一线维护工作中，只要这些活动被认为是属于“操作员例行工作”的范围，后者是可以通过人类感官来执行的，或是只要使用一些简单的工具，而不必进行数据采集。除了执行一线维护和操作员例行工作之外，不需计划的维护工作指令来支持这些活动。
Those activities considered as Predictive Maintenance methods and are not covered in First line Maintenance will be transferred into the PdM program.
视作“预测性维护”方法并且“第一线维护”中没有涵盖的那些活动将转移到 PdM 计划中。
Those activities that may need materials, special tools and safety restrictions such as isolation other than PdM activities will be the activities covered in Preventive Maintenance.
对于可能需要材料、专用工具以及安全限制的活动，比如隔离（PdM活动除外），将在“预防性维护”中规定。

华译网北京翻译公司翻译过大量有关预防性维护范围的文件资料,Beijing Chinese Translation Service Company has translated many technical documents about Preventive Maintenance Scope  
For those activities where it is necessary to dismantle a equipment to inspect internal parts for looseness, wear or damage will be considered as corrective tasks and called out based on fault finding. The fault finding can be the condition findings from Predictive Maintenance by vibration/thermal analysis, oil/coolant analysis and performance analysis.
对于在执行时必须要将拆开来检查内部零件是否松散、磨损或伤损的活动，则视同于纠正性任务，并依据故障查找的结果来指派。故障查找包括以振动分析/热分析、油分析/冷却剂分析和性能分析，从预测性维护中进行的条件查找。
For filters, preventive maintenance will only cover those filters without differential pressure indication. The mandatory replacement for these with special elements, such as paper tubes, coal granules, wood chips, desiccants, sand etc, will be done as per manufacturers’ recommendations. In addition, Preventive Maintenance also covers filter analysis.
对于过滤器，预防性维护的范围中只能包括不带差压指示的过滤器。对于规定的以特殊部件来进行的替换，比如纸管、煤粒、木屑、干燥剂、砂子等，应当依据制造商的推荐来执行。此外，预防性维护活动中也包括过滤器分析。
Since lube oil and coolant sample analysis are covered in Predictive Maintenance, the Preventive Maintenance only covers drain samples, visual inspections for levels/color/clarity and the present of free water.
因为润滑油和冷却剂采样分析包括在预测性维护中，预防性维护就只包括了排放采样，进行液位/颜色/清澈度方面的视检，同时观察是否有水存在。
Preventive maintenance may cover some vibration and temperature inspection, but it is only for operative first line diagnosis by comparing the parameters before and after the maintenance execution. This kind of inspection usually carried out by utilizing simple handheld instruments without history trending required, such as, vibration pen and IR temperature gun.
预防性维护可以包括一些振动和温度方面的检查，但只是为操作性一线故障诊断而执行，方法是比较维护执行前后的参数。这类检查通常是采用简单的手持式工具来执行的，不需趋势性历史数据，比如振动笔和IR温度枪。
Usually the frequency of a preventive maintenance activity is not less than one month, except for the maintenance strategies for some Safety Critical Elements, such as Fire water pumps and life boats. Where the minimum frequency for a planned maintenance task is mandated by regulations.
预防性维护活动的频率通常不短于一个月，用于某些“安全关键元件”（如火灾水泵和救生船）的维护战略除外。其中，计划维护任务的最低频率是规章制度所定的。