GB/T 21790-2025 Active National standards

GB/T 21790-2025 Determination of flash point—Method for flash no-flash and flash point by small scale closed cup tester

Publish Date: 2025-10-05 Implement Date: 2026-02-01 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 21790-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Logo, packaging, transportation, storage

ICS Name: \nProtection against dangerous goods

Publish Date: 2025-10-05

Implement Date: 2026-02-01

Pages: 32 pages

Scope

This document describes three procedures (A, B, and C) for determining flash point and flammability, and specifies the principles, reagents and materials, instruments, samples, test steps, test data processing, result expression, precision, and test reports for the three procedures.
Procedures A and B in this document are applicable to color paints (including water-based paints), varnishes, paint bases for color paints and varnishes, adhesives, solvents, petroleum products (including aviation turbine fuels), diesel and kerosene fuels, methyl esters of fatty acids, and related products for flash point and flammability testing within the temperature range of -30 °C to 300 °C. Procedures A and B in this document are respectively applicable to determining whether a product will flash at a specified temperature (Flammability Determination Procedure A) and the flash point of a sample (Procedure B). When using a flash point detector, this document is also applicable to determining the flash point of methyl esters of fatty acids (FAMEs).
Procedure C in this document is applicable to petroleum products (including aviation turbine fuels), diesel and kerosene fuels, and petroleum-related products with a flash point temperature within the range of -20 °C to 300 °C. Its precision is determined within the range of 40 °C to 135 °C.