GB 21976.7-2012Escape apparatus for building fire - Part 7: Filtering respiratory protective devices for self-rescue from fire (English PDF)

5.1 Structure

5.1.1 The filtering respiratory protective devices for self-rescue from fire (hereinafter referred to as "respirator") shall consist of a protective hood, a filtering device, a half mask, or otherwise a protective hood and a filtering device.

5.1.2 The basic design dimensions of the respirator shall be for adults.

5.2 Wearing mass The wearing mass of the respirator shall not exceed 1000 g.

5.3 Materials

5.3.1 Surface quality of metal materials All metal parts of the respirator shall be subjected to corrosion-resistance treatment. The surface shall be free from such defects as cracks, wrinkles, burrs.

5.3.4 Strength of packaging materials The respirator shall be sealed and packaged. The packaging material shall have sufficient fastness.

5.4 Resistance to mechanical impact and environmental change The respirator shall have sufficient stability for the specified mechanical load, ambient temperature and humidity changes.

5.5 Protective performance

5.5.1 Protective performance for carbon monoxide During the rated protective time, in any single 5 min process, the time-weighted average of the carbon monoxide's penetrating concentration shall not exceed 200 mL/m3, the inhalation temperature shall not exceed 65 °C, the inhalation resistance shall not exceed 800 Pa, the exhalation resistance shall not exceed 300 Pa.

5.6 Protective hood

5.6.1 Air-leakage coefficient The air-leakage coefficient of the eye area of the protective hood shall not exceed 20%. The air-leakage coefficient of the breathing zone shall not exceed 5%. If there is no half mask in the respirator, the air-leakage coefficient of the protective hood shall not exceed 5%.

5.7 Mechanical structural integrity of the respirator at high concentrations of carbon monoxide Under high concentrations of carbon monoxide, the respirator shall maintain its mechanical structural integrity and not pose a hazard to the wearer.

5.8 Connection strength The connection between the filter device and the protective hood can withstand an axial tensile force of not less than 50 N.

5.9 Personnel wearing suitability Without the aid of tools, it shall be able to quickly open the seal of the filter device of the respirator. The wear shall be quick and easy. The strap shall be quick to tighten and disengage.

6.3 Material test

6.3.1 Surface quality of metal materials Use visual inspection to determine it.

6.3.4 Strength test of packaging materials

6.3.4.1 Anti-drop performance test Allow the packed respirators (storage-type respirators are not tested) to drop from a height of

1.5 m to a flat concrete floor for 6 times at different azimuth angles.

6.4 Test of resistance to mechanical collision and environmental change

6.4.1 Test of resistance to mechanical collision It is carried out according to the provisions of

6.2.2.3 of GB 2626- 2006.The test time of the storage-type respirator is 20 min. The test time of the portable respirator is 100 min.

6.5.1 Test of protection of carbon monoxide

6.5.1.1 Test conditions The test conditions are as shown in Table 1.

6.5.1.3 Test preparation The test preparation is carried out as follows:

6.5.1.5 Record The record shall include the following.

6.5.2 Test of smoke-filter performance The test of smoke-filtering performance is carried out according to the provisions of 7.9.2 ~

7.9.5 of GB 2890-2009.

6.6 Test of performance of protective hood

6.6.1 Test of air-leakage coefficient The test of the air-leakage coefficient of the protective hood shall be carried out in accordance with the provisions of 6.6.2 ~

6.6.5 of GB 2890-2009.

6.6.2 Test of view field The test of visual field is carried out according to the provisions of 6.8.2 ~

6.8.5 of GB 2890-2009.

6.6.3 Test of carbon dioxide content in inhaled gases

6.8 Test of connection strength Use a dynamometer to measure the tension in the direction as shown in Figure 4.

6.9 Test of personnel wearing suitability Only those respirators that have passed the inspections of 5.1 ~

5.8 can be used for the wearing suitability test.

7.1 Exit-factory inspection

7.1.1 The product shall pass the inspection by the quality inspection department of the manufacturer and accompanied by the product certificate before exit- factory.

7.2 Type inspection

7.2.1 The product shall be subjected to type inspection in one of the following cases.

7.2.2 The batch size of products as provided for type inspection shall be not less than 200.The type inspection shall be carried out according to Table 4.

7.2.3 When all the type inspection items comply with the requirements of this part, it is qualified.

8.1 Marking

8.1.1 At an eye-catching part of a single respirator, it shall be indicated of the following.

8.1.2 The surface of the package shall have the following contents.

8.1.3 The product's instruction manual shall contain at least the following.

8.2 Packaging

8.3 Transportation It shall not be mixed with oil or corrosive chemicals during transportation. It shall have measures to prevent sun exposure and rain.

8.4 Storage The product shall be stored in a well-ventilated warehouse which has a temperature of 0 °C~40 °C. It shall be kept away from heat sources and shall not be stored together with flammable or corrosive materials.