GB/T 33579-2017 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 33579-2017 | English | 560 |
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Safety of machinery - Control methods of hazardous energy - Lockout/Tagout
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GB/T 33579-2017: Safety of machinery - Control methods of hazardous energy - Lockout/Tagout---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/GBT33579-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.110
J 09
Safety of machinery - Control methods of hazardous energy
- Lockout/tagout
Issued on. MAY 12, 2017
Implemented on. DECEMBER 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword... 4
Introduction... 5
1 Scope... 7
2 Normative references... 7
3 Terms and definitions... 8
4 Responsibilities... 10
5 Design... 11
6 Hazardous energy control solutions... 15
Appendix A (Normative) Lockout/tagout solution... 29
Appendix B (Normative) Universal lockout/tagout procedures... 37
Appendix C (Informative) Example of energy control procedure... 40
Appendix D (Informative) Sample lockout/tagout posting... 42
Appendix E (Informative) Team lockout/tagout... 43
Appendix F (Informative) Alternatives for printing industry... 49
Appendix G (Informative) Alternatives for the plastics industry... 50
Appendix H (Informative) Alternatives for robots... 52
Appendix I (Informative) Sample of lockout/tagout checklist... 53
References... 56
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by AND shall be under the jurisdiction of the National
Machinery Safety Standardization Technical Committee (SAC/TC 208).
Drafting organizations of this standard. Suzhou Aokun Intelligent Robot Technology
Co., Ltd., Pilz Automation Trading (Shanghai) Co., Ltd., Lihong Safety Equipment
Engineering (Shanghai) Co., Ltd., China Machinery Productivity Promotion Center,
Nanjing Forestry University Optomechanical and Electrical Instrument Engineering
Research Institute, Fujian Minxuan Technology Co., Ltd., China Institute of
Standardization.
The main drafters of this standard. Li Zhengde, Huang Zhijiong, Li Qin, Li Liyan, Hou
Hongying, Zhang Xiaofei, Xu Kai, Ju Ronghua, Cheng Hongbing, Ning Yan, Chen
Nengyu, Chen Zhuoxian, Zhu Bin, Fu Huiqing, Liu Zhiyong, Yin Zhiyao, Liu Xia.
1 Scope
This standard specifies requirements for the control of hazardous energy that may cause
personal injury.
This standard also specifies the protection steps, technology, design, methods,
performance indicators for controlling the accidental release of hazardous energy 1), so
as to avoid personal injury.
This standard applies to the design, manufacturing, installation, construction, repair,
adjustment, inspection, dredging, setting, fault finding, testing, cleaning, disassembly,
service, maintenance during the entire life cycle of the machine.
This standard does not apply to service or maintenance work on electrical equipment,
that is connected to the power supply by wires and plugs, AND where the plugging and
unplugging of the power plug is only under the personal control of the service or
maintenance personnel. In this case, unplugging the power cord may control the
possible injury, which is caused by accidentally energizing or accidentally starting the
machine.
This standard also does not apply to pressure pipeline transmission and distribution
systems involving water, steam, natural gas or petroleum products.
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) is
applicable to this standard.
GB 5226.1-2008 Electrical safety of machinery - Electrical equipment of machines
- Part 1.General requirements
GB/T 15706-2012 Safety of machinery - General principles for design - Risk
assessment and risk reduction
1 From the perspective of the person exposed to the risk, any unexpected action, such as energization, starting and
release of stored energy, is an accidental release of hazardous energy.
GB/T 19876 Safety of machinery - Positioning of protective equipment with respect
to the approach speeds of parts of the human body
3 Terms and definitions
The terms and definitions as defined in GB 5226.1-2008 and GB/T 15706-2012, as well
as the following terms and definitions, apply to this document.
3.1
Alarm
Use of auditory or visual means to remind personnel of impending dangers, such as
the start-up, movement, failure or malfunction of machines.
3.2
Authorized individual
Personnel assigned to perform hazardous energy control.
3.3
Control circuit
A circuit used to start or interrupt the energy of a machine, OR a circuit of a control
device or system used to control the performance of a machine without directly
interrupting the energy.
Note. The control circuit can adopt hydraulic, pneumatic, electrical, electromechanical and
other methods.
3.4
Control reliability
The ability of a system to prevent or avoid hazardous movement, when a single
component of the equipment or system fails.
3.5
Control system
Sensors, manual input and mode selection components, interlocking and voting
circuits, output components provided to machine's operating devices or mechanisms.
3.6
De-energized
All energy sources are disconnected and there is no residual or stored energy.
4 Responsibilities
4.1 Manufacturer’s responsibilities
Manufacturers shall consider the control of hazardous energy, when designing,
manufacturing, installing machines, so that users can effectively control hazardous
energy when engaging in relevant activities (see Chapter 1), during the entire life cycle
of the machine.
4.2 User responsibilities
Users shall follow the relevant provisions of this standard, to formulate effective plans,
to protect personnel engaged in relevant activities (see Chapter 1) during the entire life
cycle of the machine, from dangerous energy injuries.
4.3 Responsibilities of authorized individual
Authorized individual shall comply with user-provided programs, procedures, and
training for performing hazardous energy control.
5 Design
5.1 Requirements for manufacturers
5.1.3 Partially energized
For those functions that require partial energization, the manufacturer shall conduct a
risk assessment, in accordance with Chapter 5 of GB/T 15706-2012, to determine the
safest method of entering the machine. When it is necessary to maintain partial
energization (such as to clamp workpieces, preserve information, maintain heat, or
provide local lighting), other control methods shall be provided, to ensure the safety of
personnel.
5.2 Energy isolation device
5.2.1 General requirements
To meet the requirements of 6.3, the design, construction, and installation of machines
shall take into account energy isolation devices, according to their intended use. Energy
isolation devices shall be able to control and/or dissipate hazardous energy. Energy
isolation devices should be an integral part of the machine.
5.2.2 Location
Energy isolation devices shall be installed in easily accessible locations. If feasible, it
shall be located so that the locking device is easy to apply during repair and
maintenance.
5.2.3 Identification
All energy isolation devices shall be adequately identified or marked, unless their
location and arrangement make their purpose obvious. The identification shall include
the following.
5.2.4 Performance
Energy isolation devices shall be able to be locked or fixed in an effective isolation
position.
5.2.5 Applicability
Each energy isolation device shall be evaluated to determine its applicability for its
intended use.
5.4 Warnings and special instructions
The manufacturer shall determine whether warnings and special instructions are
required when servicing or maintaining the machine. The manufacturer shall provide
appropriate information in the user manual.
5.5 Local component isolation
If a component or system of components requires individual service or maintenance,
local component isolation shall be provided when the machine is installed. The number
and location of energy isolation devices shall be determined, based on the configuration
and intended use of the machine.
5.6 Documentation requirements
The user manual provided by the manufacturer shall detail.
5.7 Stored energy and residual energy
If stored or residual energy has been determined to be hazardous, means for safely
dissipating or confining the stored or residual energy shall be integrated into the
machine. Devices used to dissipate stored energy shall be designed with means or
methods for verifying their location and status.
5.8 Control integration
If other methods are used for setting up, troubleshooting or other tasks requiring de-
energization or partial energization, a protection system shall be used, to ensure that the
failure of individual components within the device or system can still stop or prevent
hazardous movement or release of hazardous energy.
6 Hazardous energy control solutions
6.1 User responsibilities
6.1.1 Equipment
The user's machine shall meet the requirements of Chapter 5.If the user's machine does
not meet the requirements of Chapter 5, the user shall modify and upgrade the machine,
to comply with the requirements of Chapter 5.
6.1.2 Solution
Users shall develop a written solution for hazardous energy control; refine the
requirements of 6.3 or 6.4.The purpose of the solution is to ensure that before the
authorized individual perform the installation, construction, repair, adjustment,
inspection, unclogging, setting, troubleshooting, testing, cleaning, disassembly, service,
maintenance of machinery, that could unexpectedly energize, start, or release stored
energy and cause injury, the risk of exposure to hazard is eliminated or minimized (see
Figure 1).
6.2 Control methods
The choice of hazardous energy control method depends on whether the task can be
performed under energized conditions. Generally, the preferred method of hazardous
energy control is lockout/tagout as specified in 6.3.
6.3.2.3.3 Confirmation
Each procedure shall be verified by industry experts for accuracy, completeness, and
effectiveness of energy controls.
6.3.2.3.4 Approval
Each procedure shall be approved by the user's designated personnel before
implementation.
6.3.2.4 Protective materials and hardware
The user shall provide all protective materials and hardware, which are needed to
achieve energy isolation.
6.3.2.5 Energy isolation
Lockout and tagout shall only be done by authorized individual.
6.3.3 Energy control elements
6.3.3.1 General requirements
Energy control elements shall include the following actions; meanwhile it shall be
performed in the order of 6.3.3.2 ~ 6.3.3.10.
6.5 Communication and training
6.5.1 Communication
It is the user's responsibility to inform all personnel of the appropriate levels of
hazardous energy control and to notify appropriate authorized individual of all aspects
of the hazardous energy control solution, such as plan changes, incident experience,
plan progress, work performance data, review results, other relevant details.
6.6 Review of hazardous energy control solution
6.6.1 General requirements
Users shall regularly evaluate the condition and effectiveness of each element of
hazardous energy control solution (see 6.2). The assessment shall include at a minimum.
written procedures, specific machinery and processes, lockout/tagout hardware, energy
isolation devices, other control methods, communication and training.
6.6.3 Application of specific procedures
Compliance with specific hazardous energy control procedures is critical. Therefore,
users shall establish an ongoing audit plan, to provide the latest information on the
effectiveness of maintenance applications. Users are responsible for executing an audit
plan, to verify full compliance with procedures. Audits shall be conducted at least
annually; documentation shall be retained for at least 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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