G/TBT/N/THA/661  
31 March 2022  
(22-2631) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  English  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6  
 
1. Notifying Member:  THAILAND  
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible:   
Thai Industrial Standards Institute (TISI), Ministry of Industry  
Name and address (including telephone and fax numbers , email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated  if different from above:   
WTO/TBT Enquiry Point and Notification Authority  
Thai Industrial Standards Institute (TISI), Ministry of Industry  
Tel: (662) 430 6831 ext. 2130  
Fax: (662) 354 3041  
E-mail: thaitbt@tisi.mail.go.th  
Website: https://www.tisi.go.th  
3. Notified under Article 2.9.2 [X], 2.10.1 [  ], 5.6.2 [  ], 5.7.1 [  ],3.2 [  ], 7.2 [  ], 
other  :  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading. ICS numbers may be provided in addition, where applicable):  Hot-Dip 
Zinc-Coated Cold Reduced Flat Steel (ICS 77.140.50)  
5. Title, number of pages and language(s) of the noti fied document:  Draft Ministerial 
Regulation on  Hot-Dip Zinc -Coated Cold Reduced Flat Steel (TIS 50 -25xx (20xx) ; (36 
page(s), in Thai)  
6. Description of content:  The draft ministerial regulation mandates hot -dip zinc -coated 
cold reduced flat steel to comply with the standard TIS 50 -25xx (20xx) 
TIS 50 -25xx (20xx) covers : 
- Hot-dip zinc -coated cold reduces flat steel coated by substance mainly composed of zinc 
to improve rust protection properties and may be processed by chemical treatment, oil 
coating for more varied applications, in form of sheets, strips and corrugated sheets . 
- Hot-dip zinc -coated cold reduced flat steel with a nominal thickness up to 3 .20 mm . 
- Hot-dip zinc -coated cold reduced flat steel corrugated sheet with a minimum thick ness 
of 0.11 mm, with pitch of 76 mm and depth of 18 mm (large corrugated ), and  pitch of 
32 mm and depth of 9 mm (small corrugated ). 
TIS 50 -25xx (20xx) excludes:  
- Hot-dip zinc -coated cold reduced flat steel contained with zinc -ferrous alloy layer 
(galvann eal) G/TBT/N/THA/661  
 
- 2 - 
 
  - Hot-dip zinc -coated cold reduced flat steel for automobile uses, which are already 
developed as industrial products standards.  
- Hot-dip zinc -coated cold reduced flat steel alloy with other metals, which are already 
developed as industrial products standards, such as hot -dip zinc -5% to 13% aluminium -
2% to 4% magnesium alloy -coated flat steel  
TIS 50 -25xx (20xx) specifies scope, definitions, types, grades and surface finishes, 
dimensions and normative tolerances, chemical compositions, requirements, ma rking and 
labelling, sampling and criteria for conformity, and testing . 
7. Objective and rationale, including the nature of urgent problems where 
applicable:  Protection of human health or safety  
8. Relevant documents:   
ASTM A902 –18a Standard Terminology Relating to Metallic Coated Steel Products  
JIS G 3302: 2019 Hot -dip zinc -coated steel sheet and strip  
JIS G 3316: 1987 Shapes and dimensions of corrugated steel sheets  
JIS G 0320: 2009 Standard test method for heat analysis of steel products  
JIS G 0320: 2009/ Standard test method for heat analysis of steel products (Amendment 
1) 
AMENDMENT 1: 2015  
JIS G 0320: 2009/ Standard test method for heat analysis of steel products (Amendment 
2) 
AMENDMENT 2: 2017  
JIS G 0321:2017 Product analysis and its tolerance for wrought steel  
JIS G 0404: 2014 Steel and steel products – General technical delivery requirements  
JIS G 3193: 2019 Dimensions, shape, mass and permissible variations of hot rolled steel  
plates, sheets and strips  
JIS K 0119: 2008 General rules for X -ray fluorescence analysis  
JIS Z 2241: 2020 Metallic materials - Tensile testing - Method of test at room temperature  
JIS Z 2244: 2018 Vickers hardness test - Test method  
JIS Z 2245: 2021 Rockwell hardness test - Test method  
JIS Z 8401: 2019 Rounding of numbers  
9. Proposed date of adoption:  To be determined  
Proposed date of entry into force:  To be determined  
10. Final date for comments:  60 days from notification  
11. Texts available from:  National enquiry point [ ] or address, telephone and fax 
numbers and email and website addresses, if available , of other body:   
WTO/TBT Enquiry Point and Notification Authority  
Thai Industrial Standards Institute (TISI), Ministry of Industry  
Tel: (662) 430 6831 ext. 2130  
Fax: (662) 202 3511, 354 3041  
E-mail: thaitbt@tisi.mail.go.th  
Website: https://www.tisi.go.th  
 
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