Tiêu chuẩn quốc tế

Số hiệu

Standard Number

ASTM D5621-19
Năm ban hành 2019

Publication date

Tình trạng W - Hết hiệu lực

Status

Tên tiếng Anh

Title in English

Standard Test Method for Sonic Shear Stability of Hydraulic Fluids
Chỉ số phân loại Quốc tế (ICS)

By field

75.120 - Chất lỏng thủy lực
Số trang

Page

3
Giá:

Price

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Scope of standard

1.1 This test method covers the evaluation of the shear stability of hydraulic fluids in terms of the final viscosity that results from irradiating a sample of the hydraulic fluid in a sonic oscillator. 1.2 Evidence has been presented that a good correlation exists between the shear degradation that results from sonic oscillation and that obtained in a vane pump test procedure.2 1.3 This test method uses millimetres squared per second (mm²/s), an SI unit, as the unit of viscosity. For information, the equivalent unit, cSt, is shown in parentheses. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.