Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
5.2, 8.1 and Chapter 7 of this standard are compulsory, and the rest are voluntary.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB 12441-2005 Finishing Fire Retardant Paint.
In addition to a number of editorial changes, the following technical changes have been made with respect to GB 12441-2005:
——Classification and type (see Chapter 4) are added;
——Part of technical indexes about physical and chemical properties of finishing fire retardant paint are modified, and defect category in technical requirements is deleted (see 5.2; 4.2 in Edition 2005);
——Tunnel combustion method is replaced with difficult flammability test (see 6.11; Annex B in Edition 2005);
——Inspection rules are modified (see Chapter 7; Chapter 6 in Edition 2005).
This standard was proposed and is under the jurisdiction of the Ministry of Public Security of the People's Republic of China.
The previous editions of GB 12441-2005 are as follows:
——GB 12441-1998;
——GB 15442.1-1995, GB/T 15442.2-1995, GB/T 15442.3-1995, GB/T 15442.4-1995.
The previous edition of GB 12441-1998 is as follows:
——GB 12441-1990.
Finishing Fire Resistant Coating
1 Scope
This standard specifies terms and definitions, classification and type, technical requirements, test methods, inspection rules, marks, instructions, packaging, transportation and storage of finishing fire resistant coating.
This standard is applicable to various finishing fire resistant coatings.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1720 Method of Test for Adhesion of Paint Films
GB/T 1727 General Preparation of Paint Film
GB/T 1728 Methods of Test for Drying Time of Coatings of Paints and Putties
GB/T 1731 Determination of Flexibility of Films
GB/T 1732 Determination of Impact Resistance of Film
GB/T 1733 Determination of Resistance to Water of Films
GB/T 1740 Determination of Resistance to Heat and Humidity of Paint Films
GB/T 5907
(All Parts) Fire Protection Vocabulary
GB/T 6753.1 Paints Varnishes and Printing Inks - Determination of Fineness of Grind
GB/T 8625 Test Method of Difficult-Flammability for Building Materials
GB/T 9750 Marks for Package of Coating Products
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 5907 and the following apply.
3.1
finishing fire resistant coating
the coating on the surface of flammable substrate (e.g. timber, fibre board, paper board and products), with a certain decoration effect, which is capable of expanding and foaming to form insulating protective layer
3.2
difficult flammability
the characteristic of materials difficult to carry out flame combustion under specified test conditions
3.3
char volume
the maximum volume for material char under specified test conditions
4 Classification and Type
4.1 Classification
Finishing fire resistant coating may be classified as follows according to dispersion medium:
a) Water-based finishing fire resistant coating, with water as dispersion medium;
b) Solvent-based finishing fire resistant coating, with organic solvent as dispersion medium.
4.2 Type
Product code of finishing fire resistant coating is expressed with SMT, feature codes of dispersion medium are S (water-based) and R (solvent-based). Type compilation method of finishing fire resistant coating is as follows:
Example:
SMT-S/A, expressing water-based finishing fire resistant coating, enterprise-specified code is A.
5 Technical Requirements
5.1 General requirements
5.1.1 Raw materials used for producing fire resistant coating shall meet the requirements of national environmental protection, occupational health and relevant health laws and regulations.
5.1.2 Specified dispersion medium shall be adopted for coating mixing and dilution.
5.1.3 Any or several of brush coating, spraying, roller coating and blade coating shall be adopted for finishing fire resistant coating construction, drying and curing under normal natural environment conditions; the coating shall be free from pungent smell after complete drying. After film forming, smooth finish shall be formed without obvious unevenness or streak, fines removal, bubble, cracking or spot.
5.2 Technical requirements
Technical indexes of finishing fire resistant coating shall meet the requirements specified in Table 1.
Table 1 Technical Indexes of Finishing Fire Resistant Coating
SN Items Technical indexes
1 Condition in container Uniform, no caking after stirring
2 Fineness/μm ≤90
3 Drying time Surface dry/h ≤5
Hard dry/h ≤24
4 Adhesive force/grade ≤3
5 Flexibility/mm ≤3
6 Impact resistance/cm ≥20
7 Water resistance Film shall be free from crease or peeling after 24h of test
8 Resistance to heat and humidity Film shall be free from blistering or shedding after 48h of test
9 Flame resistance time/min ≥15
10 Difficult flammability The average value of residue lengths for specimen after combustion shall be greater than or equal to 150mm, thereinto, residue combustion length of specimen shall not be zero; the average smoke temperature determined by thermocouple in each group of tests shall not exceed 200℃
11 Mass loss/g ≤5.0
12 Char volume/cm3 ≤25
6 Test Methods
6.1 Test preparation
6.1.1 Test substrate
Substrate for physical and chemical property tests (except test of resistance to heat and humidity) shall meet the requirements of GB/T 1727. Test substrate of resistance to heat and humidity is transparent organic glass plate with dimension about 150mm×70mm×1mm. Substrate for fire resistance test shall meet the requirements of Annexes A and B. The dimension of substrate for difficult flammability test shall meet the requirements of GB/T 8625, while that of substrate for other fire resistance tests shall meet the requirements of Annexes A and B.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Type
5 Technical Requirements
6 Test Methods
7 Inspection Rules
8 Marks and Operating Instructions
9 Packaging, Transportation and Storage
Annex A (Normative) Big Plate Combustion Method
Annex B (Normative) Chamber Combustion Method
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
5.2, 8.1 and Chapter 7 of this standard are compulsory, and the rest are voluntary.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB 12441-2005 Finishing Fire Retardant Paint.
In addition to a number of editorial changes, the following technical changes have been made with respect to GB 12441-2005:
——Classification and type (see Chapter 4) are added;
——Part of technical indexes about physical and chemical properties of finishing fire retardant paint are modified, and defect category in technical requirements is deleted (see 5.2; 4.2 in Edition 2005);
——Tunnel combustion method is replaced with difficult flammability test (see 6.11; Annex B in Edition 2005);
——Inspection rules are modified (see Chapter 7; Chapter 6 in Edition 2005).
This standard was proposed and is under the jurisdiction of the Ministry of Public Security of the People's Republic of China.
The previous editions of GB 12441-2005 are as follows:
——GB 12441-1998;
——GB 15442.1-1995, GB/T 15442.2-1995, GB/T 15442.3-1995, GB/T 15442.4-1995.
The previous edition of GB 12441-1998 is as follows:
——GB 12441-1990.
Finishing Fire Resistant Coating
1 Scope
This standard specifies terms and definitions, classification and type, technical requirements, test methods, inspection rules, marks, instructions, packaging, transportation and storage of finishing fire resistant coating.
This standard is applicable to various finishing fire resistant coatings.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1720 Method of Test for Adhesion of Paint Films
GB/T 1727 General Preparation of Paint Film
GB/T 1728 Methods of Test for Drying Time of Coatings of Paints and Putties
GB/T 1731 Determination of Flexibility of Films
GB/T 1732 Determination of Impact Resistance of Film
GB/T 1733 Determination of Resistance to Water of Films
GB/T 1740 Determination of Resistance to Heat and Humidity of Paint Films
GB/T 5907
(All Parts) Fire Protection Vocabulary
GB/T 6753.1 Paints Varnishes and Printing Inks - Determination of Fineness of Grind
GB/T 8625 Test Method of Difficult-Flammability for Building Materials
GB/T 9750 Marks for Package of Coating Products
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 5907 and the following apply.
3.1
finishing fire resistant coating
the coating on the surface of flammable substrate (e.g. timber, fibre board, paper board and products), with a certain decoration effect, which is capable of expanding and foaming to form insulating protective layer
3.2
difficult flammability
the characteristic of materials difficult to carry out flame combustion under specified test conditions
3.3
char volume
the maximum volume for material char under specified test conditions
4 Classification and Type
4.1 Classification
Finishing fire resistant coating may be classified as follows according to dispersion medium:
a) Water-based finishing fire resistant coating, with water as dispersion medium;
b) Solvent-based finishing fire resistant coating, with organic solvent as dispersion medium.
4.2 Type
Product code of finishing fire resistant coating is expressed with SMT, feature codes of dispersion medium are S (water-based) and R (solvent-based). Type compilation method of finishing fire resistant coating is as follows:
Example:
SMT-S/A, expressing water-based finishing fire resistant coating, enterprise-specified code is A.
5 Technical Requirements
5.1 General requirements
5.1.1 Raw materials used for producing fire resistant coating shall meet the requirements of national environmental protection, occupational health and relevant health laws and regulations.
5.1.2 Specified dispersion medium shall be adopted for coating mixing and dilution.
5.1.3 Any or several of brush coating, spraying, roller coating and blade coating shall be adopted for finishing fire resistant coating construction, drying and curing under normal natural environment conditions; the coating shall be free from pungent smell after complete drying. After film forming, smooth finish shall be formed without obvious unevenness or streak, fines removal, bubble, cracking or spot.
5.2 Technical requirements
Technical indexes of finishing fire resistant coating shall meet the requirements specified in Table 1.
Table 1 Technical Indexes of Finishing Fire Resistant Coating
SN Items Technical indexes
1 Condition in container Uniform, no caking after stirring
2 Fineness/μm ≤90
3 Drying time Surface dry/h ≤5
Hard dry/h ≤24
4 Adhesive force/grade ≤3
5 Flexibility/mm ≤3
6 Impact resistance/cm ≥20
7 Water resistance Film shall be free from crease or peeling after 24h of test
8 Resistance to heat and humidity Film shall be free from blistering or shedding after 48h of test
9 Flame resistance time/min ≥15
10 Difficult flammability The average value of residue lengths for specimen after combustion shall be greater than or equal to 150mm, thereinto, residue combustion length of specimen shall not be zero; the average smoke temperature determined by thermocouple in each group of tests shall not exceed 200℃
11 Mass loss/g ≤5.0
12 Char volume/cm3 ≤25
6 Test Methods
6.1 Test preparation
6.1.1 Test substrate
Substrate for physical and chemical property tests (except test of resistance to heat and humidity) shall meet the requirements of GB/T 1727. Test substrate of resistance to heat and humidity is transparent organic glass plate with dimension about 150mm×70mm×1mm. Substrate for fire resistance test shall meet the requirements of Annexes A and B. The dimension of substrate for difficult flammability test shall meet the requirements of GB/T 8625, while that of substrate for other fire resistance tests shall meet the requirements of Annexes A and B.
Contents of GB 12441-2018
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Type
5 Technical Requirements
6 Test Methods
7 Inspection Rules
8 Marks and Operating Instructions
9 Packaging, Transportation and Storage
Annex A (Normative) Big Plate Combustion Method
Annex B (Normative) Chamber Combustion Method
