GB/T 21221-2022 Active National standards

GB/T 21221-2022 Insulating liquids—Specifications for unused liquids based on synthetic aromatic hydrocarbons

Publish Date: 2022-07-11 Implement Date: 2023-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 21221-2022

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Electrician's insulating materials and their products

ICS Name: Other insulating fluids

Publish Date: 2022-07-11

Implement Date: 2023-02-01

Pages: 15 pages

Scope

This document specifies the marking and general delivery requirements, sampling, technical specifications, and test methods for several types of unused synthetic aromatic insulating fluids used as insulating liquid media for electrical equipment.
This document applies to unused alkylbenzene, diphenylethane, alkylnaphthalene, and methylpolyaromatic methane used as insulating liquid media for electrical equipment.

Development Information

Word Count: 31 Thousand words Pages: 15 pages

Replace the following standards

GB/T 21221-2007 Insulating liquids—Specifications for unused insulating liquids based on synthetic aromatic hydrocarbons

Referenced Standards

GB/T 10065-2007 Gassing of insulating liquids under electrical stress and ionization GB/T 18612-2011 Determination of organic chloride content in crude oil SH/T 0205 GB/T 261-1983 Petroleum products—Determination of flash point—Closed cup method GB/T 261-2008 Determination of flash point—Pensky-Martens closed cup method GB/T 261-2021 Determination of flash point—Pensky-Martens closed cup method GB/T 507-2002 Insulating liquids—Determination of the breakdown voltage at power frequency GB/T 1884-2000 Crude petroleum and liquid petroleum products—Laboratory determination of density—Hydrometer method GB/T 3535-1983 Petroleum oils—Determination of pour point GB/T 3535-2006 Petroleum products—Determination of pour point GB/T 5654-1985 Measurement of relative permittivity, dielectric dissipation factor at power frequency and volume resistivity of insulating liquids GB/T 5654-2007 Insulating liquids—Measurement of relative permittivity,dielectric dissipation factor and d.c.resistivity GB/T 25961-2010 Standard test method for corrosive sulfur in electrical insulating oils GB/T 27750-2011 Classification of insulating liquids GB/T 30515-2014 Petroleum products—Transparent and opaque liquids—Determination of kinematic viscosity and calculation of dynamic viscosity GB/T 41146-2021 Method of sampling insulating liquids NB/T 42140-2017 NB/T 42140-2017 Insulation liquid: Automatic Karl Fischer titration method for determination of moisture in oil-immersed paper and paperboard GB/T 3535-2025 Determination of pour point for petroleum products

Adopt standards

IEC 60867:1993

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