ISO 7203-3:2019
Fire extinguishing media — Foam concentrates — Part 3: Specification for low-expansion foam concentrates for top application to water-miscible liquids
This document specifies the essential properties and performance of liquid foam concentrates used to make low-expansion foams for the control, extinction and inhibition of re-ignition of fires of water-miscible liquids. Minimum performance on certain test fires is specified.
These foams are suitable for top application to fires of water-miscible liquids. Those foams that also comply with ISO 7203-1 are also suitable for top application to fires of water-immiscible liquids.
The foam concentrates can be suitable for use in non-aspirating sprayers or for subsurface application to liquid fires, but requirements specific to those applications are not included in this document.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Grades and uses of foam concentrates
4.1 Grades
4.2 Use with sea water
5 Tolerance of the foam concentrate to freezing and thawing
6 Sediment in the foam concentrate
6.1 Sediment before ageing
6.2 Sediment after ageing
7 Determination of viscosity
7.1 Newtonian foam concentrates
7.2 Pseudo-plastic foam concentrates
8 pH of the foam concentrate
8.1 pH limits
8.2 Sensitivity to temperature
9 Expansion and drainage of foam
9.1 General
9.2 Expansion limits
9.3 Drainage limits
10 Test fire performance
11 Marking, packaging and specification sheet
11.1 Marking
11.2 Packaging
11.3 Specification sheet
Annex A (normative) Preliminary sampling and conditioning of the foam concentrate
Annex B (normative) Determination of tolerance to freezing and thawing
Annex C (normative) Determination of percentage of sediment
Annex D (normative) Determination of viscosity for pseudo-plastic foam concentrates
Annex E (normative) Determination of expansion and drainage time
Annex F (normative) Determination of test fire performance
Annex G (informative) Determination of radiation measurement method
Annex H (informative) Compatibility
Annex I (informative) Small-scale fire test
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Grades and uses of foam concentrates
4.1 Grades
4.2 Use with sea water
5 Tolerance of the foam concentrate to freezing and thawing
6 Sediment in the foam concentrate
6.1 Sediment before ageing
6.2 Sediment after ageing
7 Determination of viscosity
7.1 Newtonian foam concentrates
7.2 Pseudo-plastic foam concentrates
8 pH of the foam concentrate
8.1 pH limits
8.2 Sensitivity to temperature
9 Expansion and drainage of foam
9.1 General
9.2 Expansion limits
9.3 Drainage limits
10 Test fire performance
11 Marking, packaging and specification sheet
11.1 Marking
11.2 Packaging
11.3 Specification sheet
Annex A (normative) Preliminary sampling and conditioning of the foam concentrate
Annex B (normative) Determination of tolerance to freezing and thawing
Annex C (normative) Determination of percentage of sediment
Annex D (normative) Determination of viscosity for pseudo-plastic foam concentrates
Annex E (normative) Determination of expansion and drainage time
Annex F (normative) Determination of test fire performance
Annex G (informative) Determination of radiation measurement method
Annex H (informative) Compatibility
Annex I (informative) Small-scale fire test
Bibliography