GB/T 7596-2017In-service quality criteria of mineral turbine oils used in power plants (English PDF)

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 7596-2008 "Turbine oil quality in power plant operation", compared with GB/T 7596-2008, the main technology The changes are as follows:

--- the name has been revised; - the scope of the amendment; - updated the reference standard version; - the oil quality index of the turbine in operation and the oil quality index of the gas turbine in operation are merged; The quality standard of the gas turbine used in the operation increases the "flash point", "foam" and "air release"

--- The quality index of the turbine oil in operation removes the "mechanical impurities"

--- increase the "color" indicator for running turbine oil;

--- revision of the indicators of solid particle pollution level, foam, rotating oxygen bomb value, antioxidant content and other indicators;

--- Appendix A is revised as "SAEAS4059F Particulate Contamination Classification Standard". This standard is proposed by the China Electricity Council. This standard is under the jurisdiction of the National Electrification Standardization Technical Committee (SAC/TC322). The main drafting unit of this standard. Xi'an Thermal Engineering Research Institute Co., Ltd. This standard participates in the drafting unit. Sinopec Lubricant Co., Ltd., State Grid Shandong Electric Power Company Electric Power Research Institute, State Grid Hunan Provincial Electric Power Company Electric Power Research Institute, Sichuan Electric Power Industry Adjustment Test Institute. The main drafters of this standard. Liu Yongluo, Yi Meirong, Tang Jinwei, Yu Naihai, Zhou Zhou, Xu Wei, Zhong Cheng. This standard replaced the previous version of the standard release. GB/T 7596-1987, GB/T 7596-2000, GB/T 7596-2008. Power of Mineral Turbine Oil in Power Plant Operation

1 Scope

China's national in-service quality criteria for mineral turbine oils in power plants. A turbine's oil system does two jobs at once - it lubricates the bearings and it works the hydraulic governing that controls the machine - and both fail in the same way if the oil deteriorates. The failure modes are specific. Water entering from gland steam emulsifies the oil and rusts the system; oxidation produces acids and then varnish, a soft deposit that settles on servo valves and can jam a governor, which on a turbine means either a trip or an overspeed; and particles from wear score the same valves. Since a turbine's charge is tens of thousands of litres kept for decades, monitoring is what maintains it. The standard specifies the quality criteria for mineral oils used for lubrication and speed control of steam and gas turbine systems in power plants, may also be applied to equipment such as wind turbines and feed pumps, and does not apply to non-mineral synthetic fluids.

This standard specifies the quality standards for turbine turbines, turbines and gas turbine systems for lubrication and speed control of power plants. This standard applies to the quality supervision of turbine turbines, turbines and gas turbine systems for the lubrication and regulation of mineral turbine oils. The quality standards of mineral turbine oils used in power plant equipment such as wind turbines and feed pumps are also available. This standard does not apply to a variety of non-mineral synthetic liquids for turbine lubrication and speed regulation.

2 Normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. Petroleum products - Determination of acid value GB/T Determination of kinematic viscosity of petroleum products and calculation of dynamic viscosity GB/T

GB/T 3141 Industrial fluid lubricants ISO viscosity classification

GB/T 3536 Determination of flash point and ignition of petroleum products (Cleveland Open Cup method) Petroleum products - Color determination method GB/T

GB/T 7600 Determination of moisture content of transformer oil in operation (coulometric method)

GB/T 7602 Turbine oil, transformer oil T501 Antioxidant content determination method (spectrophotometric method) Determination of emulsification degree of steam turbine oil in GB/T 7605 operation

GB 11120 Turbine oil Test method for antirust property of mineral oil in the presence of water GB/T 11143

GB/T 12579 Determination of foam properties of lubricating oils Guideline for the maintenance of oil turbine operation for the operation of power plants

GB/T 14541 DL/T 429.1 Oxygen system for power systems - Determination of transparency Method for measurement of particle contamination in power oil GB/T Determination of air release value of lubricating oil SH/T 0193 Determination of oxidation stability of lubricating oil (rotary oxygen bomb method) SAEAS4059F Aerospacefluidpower-Contamination classificationforhydraulicfluid Standard Test of Determination of Hindered Phenol and Aromatic Amine Antioxidant in Zinc-free Turbine Oil by Linear Sweep Voltammetry with ASTM D6971 Method (Standardtestmethodformeasurementofhinderedphenolicandaromaticamineantoxyantcon- tentinnon-zincturbineoilsbylinearsweepvoltammetry

3 Technical requirements

3.1 The acceptance of the new turbine oil shall be carried out in accordance with GB 11120.

3.2 The quality of turbine oil in operation shall comply with the requirements in Table 1.

3.3 The routine inspection cycle and inspection items of turbo oil in operation shall be carried out in accordance with the provisions of GB/T 14541.