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GB/T 30807-2025: Thermal insulating products for building applications - Determination of long-term water absorption by immersion
Status: Valid GB/T 30807: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 30807-2025 | English | 284 |
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Thermal insulating products for building applications - Determination of long-term water absorption by immersion
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GB/T 30807-2025
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| GB/T 30807-2014 | English | 279 |
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Thermal insulating products for building applications -- Determination of long-term water absorption by immersion
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GB/T 30807-2014
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PDF similar to GB/T 30807-2025
Basic data | Standard ID | GB/T 30807-2025 (GB/T30807-2025) | | Description (Translated English) | Thermal insulating products for building applications - Determination of long-term water absorption by immersion | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q25 | | Classification of International Standard | 91.120.10 | | Word Count Estimation | 14,157 | | Date of Issue | 2025-06-30 | | Date of Implementation | 2026-01-01 | | Older Standard (superseded by this standard) | GB/T 30807-2014 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 30807-2025: Thermal insulating products for building applications - Determination of long-term water absorption by immersion
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT30807-2025
ICS 91.120.10
CCSQ25
National Standard of the People's Republic of China
Replaces GB/T 30807-2014
Determination of long-term water absorption of thermal insulation products for building by immersion method
(ISO 16535.2019, IDT)
Released on June 30, 2025
Implementation on January 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Principle 1
4.1 Method 1.Partial immersion 1
4.2 Method 2.Full immersion 2
5 Instruments 2
6 Sample 4
6.1 Specimen size 4
6.2 Number of samples. 4
6.3 Sample preparation 4
6.4 Sample Condition Adjustment 4
7 Step 5
7.1 Test conditions 5
7.2 Test Step 5
8 Calculation and Expression of Results 6
8.1 General 6
8.2 Long-term water absorption after partial immersion 6
8.3 Long-term water absorption after full immersion 7
9 Test Accuracy 7
10 Test Report 8
References 9
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 30807-2014 "Determination of long-term water absorption of thermal insulation products for building use by immersion method" and GB/T 30807-
Compared with.2014, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) Deleted “Long-term water absorption”, “Long-term water absorption rate” and “Long-term water absorption” (see Chapter 3 of the.2014 edition);
b) Added a description of the principle of Method 2C in “Method 2.Full Immersion” (see 4.2);
c) Added description of test conditions in tropical regions in “Tap Water” (see 5.3);
d) Added special preparation method requirements in "Specimen Preparation" (see 6.3);
e) Added the description of the sample conditioning requirements for tropical regions in “Sample Conditioning” (see 6.4);
f) Added the description of test requirements for tropical regions in “Test conditions” (see 7.1);
g) The test standard for test size in “Test Procedure” has been changed (see 7.2, 7.2 of the.2014 edition);
h) The description of Method 2C in the "Test Procedure" has been changed, and the formula for Method 2B has been added (see 7.2.2, 7.2.2 of the.2014 edition);
i) Added the formula for Method 2C in “Calculation and Expression of Results” (see 8.3);
j) Added the content description of "Test Accuracy" (see Chapter 9);
k) Added information that should be included in the "Test Report" (see Chapter 10).
This document is equivalent to ISO 16535.2019 "Thermal insulation products for building use - Determination of long-term water absorption by immersion method".
The following minimal editorial changes have been made to this document.
--- Added Notes (see Chapter 4);
--- Added the symbol Wu for the initial water discharge in formula (1) and formula (2) (see 7.2).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed by China Building Materials Federation.
This document is under the jurisdiction of the National Technical Committee for Standardization of Thermal Insulation Materials (SAC/TC191).
This document was drafted by. Nanjing Fiberglass Research and Design Institute Co., Ltd., Zhongmin Dayang Construction Group Co., Ltd., and Haichuang Intelligent Manufacturing Technology
(Zhuhai) Co., Ltd., Laminit Building Systems (Suzhou) Co., Ltd., Zhejiang Naiguang New Materials Co., Ltd., Beijing Construction Engineering Quality
The Fourth Testing Institute Co., Ltd., Xiamen Huli District Construction Service Center, and Nanjing Sinoma Standard Certification Co., Ltd.
The main drafters of this document are. Meng Hao, Lu Weiming, Cui Jun, Zhang Wenke, Shi Xianlei, Sun Qizhuo, Zhang Rui, Wu Dongdong, Hu Qingyu, Yang Xuefei,
Wang Rui, Yang Jianping, Song Nan, and Sun Jing.
This document was first published in.2014 and this is the first revision.
Determination of long-term water absorption of thermal insulation products for building by immersion method
1 Scope
This document specifies the apparatus and procedures for determining the long-term water absorption of test specimens.
This document applies to thermal insulation products.
This document describes two methods.
--- Method 1.Partial immersion;
---Method 2.Full immersion.
Partial immersion long-term water absorption is to simulate the water absorption caused by long-term exposure of the product to water.
Long-term water absorption under full immersion is a relevant test condition for products in certain applications and has no direct relationship with on-site conditions.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
3 Terms and Definitions
There are no terms or definitions that require definition in this document.
4 Principles
4.1 Method 1.Partial immersion
The long-term water absorption by partial immersion is determined by measuring the change in mass of the lower part of the specimen after 28 days of contact with water.
Excess water that is not absorbed by the sample and adheres to the surface shall be removed by the drainage method of method 1A or the removal of initial water method of method 1B.
Note 1.1A The draining method is a partial immersion method for measuring long-term water absorption. The draining method is used to remove excess water that is not absorbed by the sample and adheres to the surface.
Note 2.1B The initial water removal method is a partial immersion method for measuring long-term water absorption. The initial water removal method is used to remove excess water that is not absorbed by the sample and adheres to the surface.
of water.
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