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GB/T 30807-2025Thermal insulating products for building applications - Determination of long-term water absorption by immersion (English PDF)

建筑用绝热制品浸泡法测定长期吸水性

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

June 30, 2025

Implementation date

January 1, 2026

Scope

GB/T 30807-2025 is the English-translated version of 建筑用绝热制品浸泡法测定长期吸水性.

GB/T 30807-2025 is a Chinese recommended national standard. Its English version is available from this page.

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Document preview — GB/T 30807-2025

National Standard of the People's Republic of China

ICS: 91.120.10
Classification: Q25

Issued by: State Administration for Market Regulation, China National Standardization Administration

1 Scope
2 Normative references
3 Terms and Definitions
4 Principle
4.1 Method 1.Partial immersion
4.2 Method 2.Full immersion
5 Instruments
6 Sample
6.1 Specimen size
6.2 Number of samples.
6.3 Sample preparation
6.4 Sample Condition Adjustment
7 Step
7.1 Test conditions
7.2 Test Step
8 Calculation and Expression of Results
8.1 General
8.2 Long-term water absorption after partial immersion
8.3 Long-term water absorption after full immersion
9 Test Accuracy
10 Test Report
1 Scope
2 Normative references
3 Terms and Definitions
4 Principles
4.1 Method 1.Partial immersion

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