GB 21976.7-2012 PDF English
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Escape apparatus for building fire - Part 7: Filtering respiratory protective devices for self-rescue from fire
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GB 21976.7-2012: Escape apparatus for building fire - Part 7: Filtering respiratory protective devices for self-rescue from fire
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB21976.7-2012
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.220.10
C 85
Escape apparatus for building fire - Part 7.Filtering
respiratory protective devices for self-rescue from fire
Issued on. NOVEMBER 05, 2012
Implemented on. JUNE 01, 2013
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Type, model... 5
5 Technical requirements... 6
6 Test methods... 8
7 Inspection rules... 16
8 Marking, packaging, transportation, storage... 18
Foreword
Clauses 5.1 ~ 5.8, clause 7, clause 8.1.1 of this part are mandatory. The
rest are recommended.
GB 21976 “Escape apparatus for building fire” is divided into the following parts.
- Part 1.Equipment guide;
- Part 2.Automatic and repetitive rescue controlled descent device;
- Part 3.Escape ladder;
- Part 4.Escape slide;
- Part 5.Escape device;
- Part 6.Escape rope;
- Part 7.Filtering respiratory protective devices for self-rescue from fire;
- Part 8.Chemical oxygen respiratory protective devices for self-rescue from
fire;
...
This part is the part 7 of GB 21976.
This part was drafted in accordance with the rules given in GB/T 1.1-2009.
This part refers to EN 403.2004 “Respiratory protective devices for self-rescue
- Filtering devices with hood for escape from fire - Requirements, testing,
marking” (English version).
This part was proposed by the Ministry of Public Security of the People's
Republic of China.
This part shall be under the jurisdiction of the National Fire Protection
Standardization Technical Committee Fire Equipment Parts Subcommittee
(SAC/TC 113/SC 5).
Drafting organization of this part. Shanghai Fire Research Institute of the
Ministry of Public Security.
The main drafters of this part. Ling Xinliang, Dai Guoding, Yang Xiaoshi, Wang
Limiao, Zeng Yuelei, Yang Xiaohua.
This part is the first release.
Escape apparatus for building fire - Part 7.Filtering
respiratory protective devices for self-rescue from fire
1 Scope
This part of GB 21976 specifies the type, model, technical requirements, test
methods, inspection rules, marking, packaging, transportation, storage, other
requirements of the filtering respiratory protective devices for self-rescue from
fire.
This part applies to the disposable filtering respiratory protective devices for
self-rescue from fire worn by personnel when they are in a place where the
oxygen concentration in the air is not less than 17% in the event of a fire.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB 2626-2006 Respiratory protective equipment - non-powered air-purifying
particle respirator
GB 2890-2009 Respiratory protection - Non-powered air-purifying
respirators
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Filtering respiratory protective devices for self-rescue from fire
A respirator for removing harmful gases such as carbon monoxide and
smoke by adsorption, absorption, catalysis and direct filtration of a filtering
device, for a person to escape in the event of a fire.
3.2
Half mask
A mask which closely matches the face, covers the mouth and nose, or
covers the mouth, nose, jaw.
3.3
Penetrating concentration
The concentration of the medium gas as measured after passing through the
filter device.
3.4
Protective time
Under the specified test conditions, the time from when the medium gas is
introduced into the filter device to the time when the concentration of the
penetrated medium gas reaches a defined value.
3.5
Inhalation temperature
Under specified test conditions, the temperature of the inhalation airflow as
measured at 40 mm from the filter device of the specimen.
4 Type, model
4.1 Type
According to the standby state of the respirator, it is divided into storage type
and portable type. The representation of storage type is omitted. The portable
type is represented by D.
4.2 Model
The preparation of the respirator’s model shall meet the following requirements.
Example.
5 Technical requirements
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 Test methods
6.1 Structural inspection
Use visual inspection and subjective perception for determination.
6.2 Determination of wearing mass
Use the electronic scale which has a range of 0 g ~ 3000 g and an accuracy of
grade-III to measure the wearing mass of the respirator.
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.
6.3.4.2 Anti-perforation and anti-tear performance test of packaging
materials
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 6.2.2.2 and 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.
6.4.2 Test of resistance to environmental change
6.5 Test of protective performance
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 Inspection rules
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 Marking, packaging, transportation, storage
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.
8.5 Expiration date of product
The product is usually valid for 3 years.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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