GB/T 20829-2021Performance requirements and test method of fixed aerosol fire-extinguishing systems for ships (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 20829-2007 "Performance requirements and test methods for fixed aerosol fire extinguishing systems on ships", and Compared with GB/T 20829-2007, in addition to structural adjustments and editorial changes, the main technical changes include.

a) Modified normative references (see Chapter 2, Chapter 2 of the 2007 edition);

b) The definitions of pyrotechnic aerosol and design density have been changed, and the definitions of aerosol extinguishing agent generators and efficiency coefficients have been added (see section 3. Chapter, Chapter 3 of the 2007 edition);

c) Deleted the definition of "full submerged fire extinguishing system" (3.8 in 2007 edition);

d) The formula for calculating the quality of the fire extinguishing agent has been changed (see 4.3.3, 4.3.3 of the 2007 edition);

e) The test requirements for polymer plates have been added (see 4.4.9);

f) The requirements of the user manual are changed, and the title of 4.5 is revised to "Precautions for Use" (see 4.5, 4.5 in the 2007 edition);

g) Added spray test requirements (see 5.7);

h) The installation height and quality requirements of the test medium are changed (see 5.8.3, 5.8.3 of the 2007 edition);

i) The test fire combination requirements are changed (see Table 4, Table 4 of the 2007 edition).

1 Scope

This document specifies the performance requirements of the fixed fully submerged aerosol fire extinguishing system (hereinafter referred to as the fire extinguishing system) of the ship's Class A machinery space Summation test method.

This document applies to the design, layout and testing of fire extinguishing systems.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 2423.1-2008 Environmental testing of electric and electronic products Part 2: Test method Test A. Low temperature

GB/T 2423.2-2008 Environmental testing of electric and electronic products Part 2: Test method Test B. High temperature

GB/T 2423.4 Environmental testing of electrical and electronic products Part 2: Test method Test Db Alternating damp heat (12h 12h cycle ring)

GB/T 2423.10 Environmental Test Part 2: Test Method Test Fc. Vibration (Sine)

GB/T 2423.18 Environmental test Part 2: Test method Test Kb. Salt spray, alternating (sodium chloride solution)

GB/T 4968-2008 Fire Classification XF499.1-2010 Aerosol Fire Extinguishing System Part 1: Hot Aerosol Fire Extinguishing Device

XF/T 506 Fire Smoke Toxicity Hazard Evaluation Method Animal Test Method

ISO 14520-1:2015 Gas Fire Extinguishing System Physical Properties and System Design Part 1: General Requirements (Gaseous fire-extinguishingsystems-Physicalpropertiesandsystemdesign-Part 1: Generalrequirements)

3 Terms and definitions

The following terms and definitions defined in GB/T 4968-2008 apply to this document.