GB/T 30508-2014 in English

《GB/T 30508-2014船舶和海上技术 液压油系统 清洁度等级和冲洗导则》由TC137（全国船用机械标准化技术委员会）归口，主管部门为国家标准化管理委员会。
本标准规定了液压油系统的管路的清洁及清洁度等级要求。液压油管路系统的管路及附属部件的清洁对保证液压系统的正常工作非常重要。
本标准还规定了带有附件的液压系统中特殊零部件的清洁方法和所需设备。
清洁工作的目的是清除安装过程中遗留的污染物,检查管路及保证液压系统有足够的清洁度。
当雷诺数Re≤3000时,系统的清洁过程为透洗;当雷诺数Re≥3000时,系统的清洁过程为冲洗。
雷诺数是流体为层流或紊流的一个指标。
本标准假定液压系统管路的清洁可部分采用酸洗方法、部分采用机械方法。此外,假定由系统供应商提供的运动组件和静止组件都是足够清洁的(见第5章)。
各产品制造商都有产品清洁度要求及清洁准则,本标准所提出的要求是对其进行补充,并不能替代。在可行的情况下,优先使用制造商的产品清洁度要求及清洁准则。

Scope

This standard specifies the cleanliness and cleanliness level requirements for pipelines in hydraulic oil systems. The cleaning of the pipeline and accessory parts of the hydraulic oil pipeline system is very important to ensure the normal operation of the hydraulic system. This standard also specifies the cleaning methods and required equipment for special parts in hydraulic systems with accessories. The purpose of the cleaning work is to remove the pollutants left during the installation process, check the pipeline and ensure that the hydraulic system has sufficient cleanliness. When the Reynolds number Re≤3000, the cleaning process of the system is throughwashing; when the Reynolds number Re≥3000, the cleaning process of the system is flushing. The Reynolds number is an indicator of whether a fluid is laminar or turbulent. This standard assumes that the cleaning of hydraulic system piping can be partly pickled and partly mechanical. In addition, it is assumed that both moving and stationary components provided by the system supplier are sufficiently clean (see Chapter 5). Each product manufacturer has product cleanliness requirements and cleanliness guidelines, and the requirements in this standard are supplementary to them and cannot replace them. Where feasible, the manufacturer's product cleanliness requirements and cleaning guidelines are preferred.