GB 4066.2-2004Fire extinguishing media -- Part 2: ABC powder (English PDF)

Foreword

Article 4 and Article 6 of this Part are compulsory; the others are voluntary.

GB 4066, Fire Extinguishing Media, is divided into two parts.

-- Part 1. BC Powder;

-- Part 2. ABC Powder.

This Part is Part 2 of GB 4066. This Part is nonequivalent to ISO 7202.1987, Fire

Protection – Fire Extinguishing Media – Powder, and the major difference between

them are as follows.

-- some modifications in formatting are made in accordance with the Chinese

language codes;

-- some expressions applicable to international standards are changed into those

applicable to Chinese standards;

-- the requirements for moisture content, moisture absorption and color are added;

-- the test methods for fire extinguishing performance are modified;

-- Annex A "Ammonium Dihydrogen Phosphate Content Test Method" and Annex B

"Flowability Test Method" are added.

This Part replaces GB 15060-2002, Ammonium Phosphate Fire Extinguishing Powder.

In addition to the reference of ISO 7202-1987, this revision is made by referencing

United States Federal Specification O-D-1380B 1990.12 Ammonium Phosphate Fire

Extinguishing Powder and the third part of Malaysian standard MS 1180 1990 Fire

Extinguishing Media – Part 3 – Specification for Powder.

Compared with GB 15060-2002, the major changes of this Part are as follows.

-- the requirements for color and discharge performance are added;

-- the requirements for content, density and grain size distribution are modified;

-- the test methods for moisture content and fire extinguishing performance are

modified;

-- the normative annex "Ammonium Dihydrogen Phosphate Content Test Method"

is added (see Annex A);

-- the informative annex "Flowability Test Method" is added (see Annex B).

From the date of implementation of this Part, GB 13532-1992 General Specifications

Fire Extinguishing Media – Part 2. ABC Powder

1 Application Scope

This Part of GB 4066 specifies the definition, requirements, test methods, inspection

rules, marking, packaging, transportation and storage of ABC fire extinguishing powder.

This Part applies to fire extinguishing powders suitable for use against fires of classes

A, B and C.

2 Normative References

The provisions in following documents become the provisions of this Part of GB 4066

through reference in this Part. For dated references, the subsequent amendments

(excluding corrigendum) or revisions do not apply to this Part, however, parties who

reach an agreement based on this Part are encouraged to study if the latest versions

of these documents are applicable. For undated references, the latest edition of the

referenced document applies.

GB 4066.1-2004, Fire Extinguishing Media – Part 1. BC Powder (ISO 7202.1987,

NEQ)

GB/T 6682-1992, Water for Analytical Laboratory Use – Specification and Test

Methods (neq ISO 3696.1987)

3 Terms and Definitions

The following term and definition applies to this Part of GB 4066.

3.1

ABC fire extinguishing media – powder

fire extinguishing powders suitable for use against fires of classes A, B and C

4 Requirements

The main performance of ABC fire extinguishing powder shall be as specified in Table

1.

Table 1

Item Technical requirement

Carry out tests as specified in 5.4 of GB 4066.1-2004.

7 Marking, Packaging, Operating Instructions,

Transportation and Storage

10 mL of nitric acid solution, use grade 3 water to dilute to 100 mL and preheat to

nearly boiling. Add (40 ~ 45) mL of quinolamethanone reagent, put on the cover for the

watch glass, heat to slightly boiling for 1 min on a closed electric furnace or place on a

water bath to preserve heat until the precipitates separate into layers, take the beaker

out, cool to room temperature and rotate the beaker for 3 to 4 times during the cooling

process.

A.4.3 Filter on a crucible filter which has been pre-dried for 45 min at (180 ± 2)°C,

filter all supernatant liquid before using about 100 mL of grade 3 water to wash

precipitates, place the precipitates and filter in an electrothermal constant-temperature

drying oven to dry for 45 min at (180 ± 2)°C, transfer to a desiccator to cool for 45 min

and weigh.

A.5 Results

Ammonium dihydrogen phosphate content x1 (%) in samples is calculated in

accordance with Formula (1).

where,

m0—the mass of sample taken during test, in g;

......