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GB 811-2010 (GB811-2010)

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GB 811-2010: PDF in English
GB 811-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.340.20
C 73
Replacing GB 811-1998
Helmets for motorcyclists
ISSUED ON. NOVEMBER 10, 2010
IMPLEMENTED ON. MAY 1, 2011
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Terms and definitions ... 5 
3 Categories, shapes and specifications ... 7 
4 Requirements ... 9 
5 Test methods ... 14 
6 Inspection rules ... 26 
7 Marks ... 28 
References ... 30 
Foreword
4.1.2 (except item d), 4.1.5, 4.1.6, 4.2 of Clause 4 and 7.1 of Clause 7 in this
Standard are mandatory, and the rest are recommendatory.
Class-A helmet’s indicators such as stiffness performance and stability of
helmet fixture refer to ECE 22-2002 “Motorcycle protective helmets”; Class-B
helmet’s indicator collision energy absorption refer to Japanese standard - JIS
T8133-1994 “Protective helmets for motorcycle and moped riders and
passengers” and Chinese Taiwan standard CNS 3902-92 “Riding motorcycle
helmets”.
This Standard replaces GB 811-1998 “Helmets for motorcyclists”.
Main changes between this Standard and GB 811-1998 are as follows.
- Added and modified some of the terms and definitions (Clause 2 of this
Edition);
- Classified helmets by helmet performance (Clause 3 of this Edition);
- Added the requirements for helmet stiffness performance, requirements for
helmet fixture stability; modified helmet projection, wearing device, goggle,
protection area, vision, collision energy absorption, and penetrating
performance (Clause 4 of this Edition);
- Specified test requirements for added items (Clause 5 of this Edition);
- Rewrote the inspection rules, and specified exit-factory inspection and type
inspection (Clause 7 of 1998 Edition and Clause 6 of this Edition);
- Added marks of helmet classification (Clause 7 of this Edition).
This Standard was proposed by The Ministry of Public Security of the People’s
Republic of China.
The drafting organizations of this Standard. National Road Traffic Safety
Product Quality Supervision and Inspection Center, Hebei Provincial Product
Quality Supervision and Inspection Institute AND Shanghai Hehui Safety
Products Manufacture Co., Ltd.
Main drafters of this Standard. Yu Chunjun, Qin Dongwei, Yang Youtao, Zheng
Genchao and Xu Xiangrong.
This Standard replaces the following previous standards.
- GB 811-1989, GB 811-1998.
Helmets for motorcyclists
1 Scope
This Standard specifies the basic structure, categories and specifications,
technical requirements, test methods, inspection rules and marks of helmets for
motorcyclists (hereinafter referred to as the “Helmets”).
This Standard is applicable to the helmets for motorcyclists (including riders
and passengers).
2 Terms and definitions
The following terms and definitions apply to this Standard.
2.1 Helmet
Device that is to reduce motorcyclist’s head injuries in a motorcycle accident.
2.2 Shell
Helmet’s outer layer structure, presenting the basic shape of the helmet.
2.3 Protective padding
Aptamer cushion that is to absorb impact energy.
2.4 Comfort padding
Padding that is to ensure comfort of wearing on the head.
2.5 Retention system
The part that is to ensure helmet firmly worn on the head.
2.6 Goggles
Eyes and face protection part that is to shelter the eyes and face without
affecting observation.
2.7 Luminous transmittance
The ratio of luminous flux of visible light through goggles and incident flux.
- There shall be no external projection of which the length is 5 mm on the
outer surface of helmet. However, parts that are easy to fall off shall not
be included, not including the following ones. device of fixed glasses
and device of fixed lens.
Note. The parts, which are easy to fall off refer to those parts that are easy to fall off
when they are impacted, not including the parts that are easy to be dismounted by
screwdrivers.
4.1.3 Protective padding
Protective padding shall meet the following technical requirements.
a) Use material that has cushioning performance, is able to absorb more
collision energy, and is non-toxic and harmless to human body;
b) The shape and specifications are body-fitted; shall not shift during wearing;
c) It shall cover testing area with even thickness.
4.1.4 Comfort padding
Comfort padding shall meet the following technical requirements.
a) Use durable material that feels comfortable, is absorbent, breathable, non-
toxic to the skin and harmless;
b) It shall ensure the comfort of helmet wearing.
4.1.5 Retention system
Parts of retention system shall be permanently connected to retention system
or helmet, and comply with the following technical requirements.
a) If retention system contains chin strap of which the width shall not be less
than 20 mm;
b) If retention system has fastening device, e.g., double D ring and sliding
stick, it shall remain enough allowance for adjustment during retention
system adjustment, so as to prevent strap loosing;
c) Quick release device like retention button shall be easy to open.
Meanwhile, it must prevent possible false operation. Putter, button or other
components used for opening mechanism shall be red or orange, and
shall be opened only during conscious operation. If retention system is
designed to open by applying pressure on some parts, retention buttons
Note. a refers to horizontal distance from central axis of headform to front part direction of
headform; b refers to horizontal distance from central axis of headform to back part
direction of headform; AC refers to horizontal distance from headform front part
backward on AA plane; HD refers to horizontal distance from headform back part
forward.
4.2.2 Helmet mass (including accessories)
Examine according to the methods specified in 5.3. Class-A shall not be greater
than 1.6 kg; Class-B shall not be greater than 1.0 kg.
4.2.3 Visual field of helmet
Conduct the test according to the method specified in 5.4. Left and right
horizontal visual field is not less than 105°, the upper-visual field is not less than
7° and the lower-visual field is not less than 45°.
4.2.4 Helmet goggles
Conduct the test according to the method specified in 5.5.1. If goggles were
broken, there must be no fragments that are less than 60°.
Conduct the test according to the method specified in 5.5.2. Visible light
transmittance of goggles is not less than 85%.
4.2.5 Stiffness (this test is only applicable to Class-A helmet)
Conduct the test according to the method specified in 5.6 and the following
requirements.
a) Under 630N force, the difference between deformation along with testing
axis and deformation of 30N, the initial load, is not greater than 40 mm;
b) When gradually unloading and recovering to 30N, the initial load, the
difference between the measured deformation and deformation of 30N,
the initial load, it not greater than 15 mm.
4.2.6 Fixture stability
Conduct the test according to the method specified in 5.7. The helmet cannot
be separated from the headform.
4.2.7 Strength properties of helmet wearing
Conduct the test according to the method specified in 5.8. There must be no
elongation of more than 25 mm, torn lace, connector falling off or buckle loosing.
4.2.8 Collision energy absorption of helmet
It shall be measured by acceleration transferred to the headform and its acting
time. Conduct the test in the method specified in 5.9 and.
a) Class-A helmet shall meet the following technical requirements.
1) Acceleration peak value is not greater than 300 g;
2) The acting time of which the acceleration peak value exceeds 150 g
should be less than 4 ms.
b) Class-B helmet shall meet the following technical requirements.
1) Acceleration peak value is not greater than 400 g;
2) The acting time of which the acceleration peak value exceeds 200 g
should be less than 2 ms (except the situation when he acceleration
peak value does not exceed 300 g);
3) The acting time of which the acceleration peak value exceeds 150 g
should be less than 4 ms.
Note. g=9.80665 m/s2.
4.2.9 Penetration resistance performance of helmet
Conduct the test in the method specified in 5.10. Steel pricker cannot penetrate
the helmet to touch the headform.
5 Test methods
5.1 Ambient conditions for laboratory
Temperature. 21°C ± 5°C; relative humidity. 40% ~ 80%.
5.2 Helmet structure, specifications, protect range test
5.2.1 Test tools
Length measuring instrument of which the division value is 0.5 mm; leveler;
protractor of which the division value is not greater than 0.1°; and testing
headforms of small, medium and large sizes.
5.2.2 Test procedures
Use measuring instrument to detect the connector of shell’s inner and outer
surfaces, chin strap, and the highest open position of lens. Measure helmet’s
specifications and protect range. put the helmet on the testing headform of
corresponding...
......
(Above excerpt was released on 2016-03-04, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GB811-2010