GA/T 536.5-2005Grading and test method on fire hazard for flammable and explosive hazmats -- Part 5: Test method of grading for oxidizing solids (English PDF)

Foreword

GA/T 536 "Classification and Test Methods for Fire Hazard of Flammable and Explosive Dangerous Goods" is divided into 6 parts.

--- Part 1. Classification of fire hazards for inflammable and explosive dangerous goods;

---Part 2. Test method for flammable solids classification;

---Part 3. Test methods for the classification of substances that are susceptible to spontaneous combustion;

---Part 4. Test method for grading of flammable substances in contact with water;

---Part 5. Method for the classification of solid oxidizing substances;

--- Part 6. Method for the classification of liquid oxidizing substances.

This part is part 5 of GA/T 536.

This section mainly refers to the United Nations Committee of Experts on the Transport of Dangerous Goods, Recommendations on the Transport of Dangerous Goods - Manual of Tests and Criteria.

(Revision 3) Part III. The technical content of 34.4.1 is formulated, and its structure and writing rules are in accordance with GB/T 1.1-2000.

Provisions.

This part was proposed by the Fire Department of the Ministry of Public Security of the People's Republic this part is under the jurisdiction of the First Technical Committee of the National Fire Protection Standardization Technical Committee (SAC/TC113/SC1).

This section is responsible for drafting the unit. Tianjin Fire Research Institute of the Ministry of Public Security.

Participated in the drafting of this section. Hebei Provincial Public Security Department Fire Bureau.

1 Scope

This part of GA/T 536 specifies the classification test method for solid oxidizing substances.

This section applies to solid oxidizing substances that require a fire hazard classification.

2 Instruments and reagents

a) potassium bromate, analytically pure;

b) cellulose, fiber length (50 ~ 250) µm, average diameter 25µm;

c) pilot device

It consists of nickel/chromium wire and power supply and meets the following conditions.

Length (300 ± 10) mm Diameter (0.6 ± 0.05) mm Resistance (6.0 ± 0.5) ohm/m Power (150 ± 7) W

d) Inorganic insulation board Length 150mm, width 150mm, thickness 6mm, impervious, thermal conductivity at 0 ° C is not higher than 0.23W/m · K;

e) balance, the minimum sensitivity is not more than 0.1g;

f) measuring cylinder, 250mL;

g) a dryer equipped with silica gel;

h) standard mesh screen with a mesh diameter of 500 µm;

i) Oven, volume above 9L, temperature control accuracy ± 1 ° C;

j) stainless steel medicine spoon;

k) Stopwatch (minimum division 0.1s).

3 Pretreatment of reagents and test samples

a) Potassium bromate Potassium bromate was placed in an oven at 65 ° C for at least 12 h, then placed in a desiccator and cooled.

b) cellulose

The cellulose was spread into a thin layer of no more than 25 mm, ovened at 105 ° C for at least 4 h, and then placed in a desiccator for cooling.

c) test sample

The particle diameter of the test sample should be less than 500 µm.

4 Test conditions

The temperature is (20 ± 5) ° C; the humidity is (50 ± 10)% RH.