ASTM D1934-20
Standard Test Method for Oxidative Aging of Electrical Insulating Liquids by Open-Beaker Method

Standard No.

ASTM D1934-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D1934-20

Scope

1.1 This test method covers two procedures for subjecting electrical insulating liquids to oxidative aging: 1.1.1 Procedure A, without a metal catalyst, and 1.1.2 Procedure B, with a metal catalyst. 1.2 This test method is applicable to insulating liquids used as impregnating or pressure media in electrical power transmission cables if less than 10 % of the insulating liquid evaporates during the aging procedures. It applies and is generally useful primarily in the evaluation and quality control of unused insulating liquids, either inhibited or uninhibited. 1.3 This test method is applicable to study the long-term behavior of an insulating liquid being considered for free breathing transformers. An unsealed vessel aging procedure, in presence of air or oxygen, allows greatly increased oxidation rate of the liquid. This procedure is rapid and provides a controlled thermal stress assessment. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 1.5 An open beaked test shall only be carried out on liquids with flash points at or above 130°C or 15°C above the oven temperature. 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. See 7.5 for a specific warning statement. 1.6 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.

ASTM D1934-20 Referenced Document

• ASTM D1169 Standard Test Method for Specific Resistance (Resistivity) of Electrical Insulating Liquids
• ASTM D445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
• ASTM D664 Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration
• ASTM D923 Standard Practices for Sampling Electrical Insulating Liquids
• ASTM D924 Standard Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids
• ASTM D971 Standard Test Method for Interfacial Tension of Oil Against Water by the Ring Method
• ASTM D974 Standard Test Method for Acid and Base Number by Color-Indicator Titration
• ASTM E145 Standard Specification for Gravity-Convection And Forced-Ventilation Ovens
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods

ASTM D1934-20 history

• 2020 ASTM D1934-20 Standard Test Method for Oxidative Aging of Electrical Insulating Liquids by Open-Beaker Method
• 2012 ASTM D1934-95(2012) Standard Test Method for Oxidative Aging of Electrical Insulating Petroleum Oils by Open-Beaker Method
• 1995 ASTM D1934-95(2005) Standard Test Method for Oxidative Aging of Electrical Insulating Petroleum Oils by Open-Beaker Method
• 1995 ASTM D1934-95(2000) Standard Test Method for Oxidative Aging of Electrical Insulating Petroleum Oils by Open-Beaker Method