GB 28374-2025 Fireproof coating for electric cable English
1 Scope
This document provides the classification and coding of products, specifies the general requirements, technical requirements, inspection rules, marking, packaging, transport and storage, and describes the corresponding test methods.
This document applies to various types of cable fireproof coatings for different application sites.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 1723 Determination of viscosity of coatings
GB/T 1724-2019 Paints varnishes and printing inks - Determination of fineness of grind
GB/T 1728-2020 Determination of drying time of coatings and putty films
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB/T 17651.2 Measurement of smoke density of cables or optical fiber cables burning under defined conditions - Part 2: Test procedure and requirements
GB/T 18380.32-2022 Tests on electric and optical fibre cables under fire conditions - Part 32 : Test for vertical flame spread of vertically-mounted bunched wires or cables - Category A F/R
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
fireproof coating for electric cable
fireproof coating applied on the surface of electric cable with rubber, polyethylene, polyvinyl chloride, cross-linked polyethylene or other materials as insulation and sheath, which is fireproof and flame retardant
3.2
smoke density
minimum light transmittance of the smoke generated by the fireproof coating for electric cable measured by a photometric device under the specified test conditions
4 Classification and coding
4.1 Classification
Fireproof coatings for electric cable are classified into the following categories according to the dispersion medium:
a) Water‑based cable fireproof coating: cable fireproof coating using water as the dispersion medium;
b) Solvent‑based cable fireproof coating: cable fireproof coating using organic solvent as the dispersion medium;
c) Other categories: fireproof coatings for electric cable other than water‑based and solvent‑based ones
4.2 Coding
The product code for fireproof coating for electric cable is denoted by DT. The dispersion medium characteristic codes for fireproof coating for electric cable are S, R and Q, representing water‑based, solvent‑based and other categories respectively. The coding method for fireproof coating for electric cable is as follows:
Example: DT‑S‑HY1, indicating a water‑based fireproof coating for electric cable with the enterprise‑defined code HY1.
5 General requirements
5.1 Fireproof coating for electric cable shall be capable of being blended and diluted with water or an organic solvent.
5.2 Fireproof coating for electric cable shall be applied by spraying, brushing or roller coating, or the combination of them, and shall be capable of drying and curing under normal natural environmental conditions. The coating surface shall be free from irregularities on its surface. The coating shall be free of irritating odor after hard dry.
Contents
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and coding
5 General requirements
6 Technical requirements
7 Test methods
8 Inspection rules
9 Marking, packaging, transport and storage
GB 28374-2025 Fireproof coating for electric cable English
1 Scope
This document provides the classification and coding of products, specifies the general requirements, technical requirements, inspection rules, marking, packaging, transport and storage, and describes the corresponding test methods.
This document applies to various types of cable fireproof coatings for different application sites.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 1723 Determination of viscosity of coatings
GB/T 1724-2019 Paints varnishes and printing inks - Determination of fineness of grind
GB/T 1728-2020 Determination of drying time of coatings and putty films
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB/T 17651.2 Measurement of smoke density of cables or optical fiber cables burning under defined conditions - Part 2: Test procedure and requirements
GB/T 18380.32-2022 Tests on electric and optical fibre cables under fire conditions - Part 32 : Test for vertical flame spread of vertically-mounted bunched wires or cables - Category A F/R
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
fireproof coating for electric cable
fireproof coating applied on the surface of electric cable with rubber, polyethylene, polyvinyl chloride, cross-linked polyethylene or other materials as insulation and sheath, which is fireproof and flame retardant
3.2
smoke density
minimum light transmittance of the smoke generated by the fireproof coating for electric cable measured by a photometric device under the specified test conditions
4 Classification and coding
4.1 Classification
Fireproof coatings for electric cable are classified into the following categories according to the dispersion medium:
a) Water‑based cable fireproof coating: cable fireproof coating using water as the dispersion medium;
b) Solvent‑based cable fireproof coating: cable fireproof coating using organic solvent as the dispersion medium;
c) Other categories: fireproof coatings for electric cable other than water‑based and solvent‑based ones
4.2 Coding
The product code for fireproof coating for electric cable is denoted by DT. The dispersion medium characteristic codes for fireproof coating for electric cable are S, R and Q, representing water‑based, solvent‑based and other categories respectively. The coding method for fireproof coating for electric cable is as follows:
Example: DT‑S‑HY1, indicating a water‑based fireproof coating for electric cable with the enterprise‑defined code HY1.
5 General requirements
5.1 Fireproof coating for electric cable shall be capable of being blended and diluted with water or an organic solvent.
5.2 Fireproof coating for electric cable shall be applied by spraying, brushing or roller coating, or the combination of them, and shall be capable of drying and curing under normal natural environmental conditions. The coating surface shall be free from irregularities on its surface. The coating shall be free of irritating odor after hard dry.
Contents of GB 28374-2025
Contents
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and coding
5 General requirements
6 Technical requirements
7 Test methods
8 Inspection rules
9 Marking, packaging, transport and storage
