GB/T 12579-2002 in English

《GB/T 12579-2002润滑油泡沫特性测定法》由TC280（全国石油产品和润滑剂标准化技术委员会）归口，TC280SC1（全国石油产品和润滑剂标准化技术委员会石油燃料和润滑剂分会）执行，主管部门为国家标准化管理委员会。
本标准规定了测定润滑油在中等温度下泡沫特性的方法。本标准适用于加或未加用以改善或遏止形成稳定泡沫倾向的添加剂的润滑油。本标准涉及到某些有危险性的材料、操作和设备，但是并未对所有的安全问题提出建议。因此，用户在使用本标准之前应建立适当的安全和保护措施，并制定相应的管理制度。

1 Scope

1.1 This standard specifies a method for the determination of the foaming characteristics of lubricating oils at specified moderate temperatures. It is applicable to lubricants which may or may not contain additives to modify or suppress the tendency to form stable foams.
Note: It is a serious problem to generate the foam by the lubricating oil in high gear, large-volume pumping and splash system and the potential problems in lubrication, cavitation and loss in systems will lead to mechanical fault. This method is valuable to choose the oil product to adapt to these lubrication systems. The ratings used to describe the foaming tendency and/or stability are empirical.
1.2 The use of this standard may involve hazardous materials, operations and equipment but not purport to address all of the safety problems associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Foreword I
1 Scope
2 Normative Reference
3 Terms and Definitions
4 Principle
5 Apparatus
6 Reagents and Materials
7 Preparation of the Apparatus
8 Procedure
9 Alternative Procedure
10 Precision
11 Report
Annex A (Normative) Test for Maximum Pore Diameter and Permeability of the Diffuser
Annex B (Normative) Thermometer Specifications