WORLD TRADE  
ORGANIZATION  G/TBT/N/CHN/219 
4 September 2006 
 (06-4199) 
Committee on Technical Barriers to Trade Original:   English 
  
 
NOTIFICATION 
 
The following notification is being circ ulated in accordance with Article 10.6. 
 
1. Member to Agreement notifying:   THE PEOPLE’S REPUBLIC OF CHINA
 
If applicable, name of local government involved (Articles 3.2 and 7.2):         
2. Agency responsible:   Standardization Administration of China (SAC) 
Name and address (including telephone and fax numbers, e-mail and web-site 
addresses, if available) of  agency or authority designated to handle comments 
regarding the notification shall be  indicated if different from above:         
3. Notified under Article 2.9.2 [  X ], 2.10.1 [   ], 5.6.2 [   ], 5.7.1 [   ], other:         
4. Products covered (HS or CCCN where applicable, otherwise national tariff heading. 
ICS numbers may be provided in  addition, where applicable:  Fused Deposition 
Modeling Machine  (ICS:  25.080.99;  HS:  8477). 
5. Title, number of pages and langu age(s) of the notified document:   National Standards of 
the P.R.C., Fused Deposition Modelling Machines ─ Technical Requirements for 
Safeguarding (10 Pages, in Chinese). 
6. Description of content:   This standard applies to fused deposition modelling machines 
(FDM).  The safety requirements and safety measures of these machines are specified as 
follows: 
1 Mechanical hazard and safeguarding 1.1 There isn’t any cusped edge, sharp corn er, sharp edge and so on that may hurt 
people on the reachable places on machine. 
1.2 On normal working condition, the machine tool or other parts should not 
accidentally turnover. 
1.3 The dependable limit measure should be taken on machine tool’s advance and 
return parts. Dependable mechanical limit de vices should be installed on each moving axis. 
1.4 The interlocked shield should be equippe d in the working area of machine tool. As 
for those machine tools with enclosed construction working area, the door of forming room 
should be interlocked. 
1.5 When the interlocked protection devices are opened, the machine tool should stop 
or cannot be started up, and it cannot be star ted up before the protection devices are closed. 
For example, when the door of the forming r oom is open, the machine tool cannot run. 
1.6 The nozzle’s holding device should be safe and dependable so as to make sure the 
nozzle won’t fall or be thrown off while moving at high speed.  G/TBT/N/CHN/219 
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  1.7  In some dangerous area, multiple and different safety protection devices should be 
used to avoid invalidation due to the same cause. 
2 Safety and safeguarding devices 
Removable safeguarding device should be mounted and removed easily. 
3 Control system and devices 
3.1 No hazard should be occurred if control signal breaks off. 
3.2 Parts of control system which is easy to be mis-operated should be designed 
mistake-allowed. 
3.3 Emergency stop device should be mounted at each working station. 4 Electrical hazards and protection 
4.1  The protection degree provided by electric enclosure should be in accordance with 
12.3 of GB 5226.1—2002. 
4.2  The machine tool ought to be ea rthed dependably. The grounded insulated 
resistance should be not less than 1 M Ω and meet with the continuity requirement of 
protection circuit. 
4.3  The electric device (including components) in the forming room of machine tool 
should be equipped with heat resistant elect ric product. (see section 4.4.3  in GB 5226.1—
2002). 
4.4  The other safety requirement of machin e tools should conform to the provision in 
chapter 4~19 of GB 5226.1—2002. 
5 The protection of high temperature  
5.1 Dependable temperature controlling device which can adjust the nozzle’s 
temperature automatically should be introduced on the nozzle heating system, and heat insulation measure should be taken on the nozzl e and the exterior of the nozzle’s heating 
system.  
5.2 Dependable temperature controlling devi ce should be used on the machine tool 
which forming room need to be heated.  This device is applicable for controlling the heater 
and preventing the temperature from being too high. 
5.3 The door of the forming room should conditionally interlock with the heating 
system of the nozzle and the door cannot be open while the nozzle is being heated or the process is going on. 
6 Baneful gas protection 
6.1 The design of machine tool should conform to the principles established in 
GB/T 18569.1—2001.  Takes into account the hazard to health caused by nocuous 
substance emission and takes measures for preventing risks and protecting health. 
6.2  The test method of harmful substan ce concentration should conform with the 
provisions of GB/T 18569.2—2001. 
7 Noise 8 Lighting. 
7. Objective and rationale, including the na ture of urgent problems where applicable:  
To protect human safety and health.  G/TBT/N/CHN/219 
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  8. Relevant documents:   -  
9. Proposed date of adoption:   
Proposed date of entry into force:    90 days after circulation by WTO Secretariat 
6 months after adoption 
10. Final date for comments:   60 days after circulation by WTO Secretariat 
11. Texts available from:  National enquiry point [  X ] or address, telephone and fax 
numbers, e-mail and web-site addresses, if available of the other body:   
WTO/TBT National Notification and Enquiry Ce ntre of the People’s Republic of China 
 Tel:  (+86) 10 82260618 Fax:  (+86) 10 82262448 
Email:  tbt@aqsiq.gov.cn