G/TBT/N/MEX/423  
27 June 2018 
(18-4064) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  Spanish  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6.  
 
1. Notifying Member : MEXICO  
If applicable, name of local government involved (Articles 3.2 and 7.2):   
2. Agency responsible : Secretaría de Economía  (Ministry of the Economy)  
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:  
Comité Consultivo Nacional de Normalización de la Secretaría de Economía  (National 
Advisory Committee on Standardization of the Ministry of the Economy), Av . Puente de 
Tecamachalco No. 6, Col . Lomas de Tecamachalco, Sección Fuentes, Naucalpan de Juárez, 
C.P. 53950, Estado de México ; Tel.: 57 29 91 00, Ext. 43274 and 43244, Fax : 55 20 97 15 
or Email: juan.rivera@economia.gob.mx  and sofia.pacheco@economia.gob.mx  
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) : Meters for 
cold potable water and hot water Tariff heading : 902820  
5. Title, number of pages and language(s) of the notified document : Proyecto de 
Norma Oficial Mexicana PROY -NOM-012-4-SCFI-2017, Instrumentos de medición -
Medidores para agua potable fría y caliente -Parte 4 : Requisitos no metrológicos (Draft 
Mexican Official Standard PROY -NOM-012-4-SCFI-2017, Measuring instruments - Meters 
for cold potable water and hot water - Part 4 : Non-metrological requirements) (cancels  
Mexican Official Standard NOM -012-SCFI-1994) (26 pages, in Spanish)  
6. Description of content : The notified draft Mexican Official Standard applies to water 
meters used to measure the volume of cold potable water and hot water flowing through a 
fully ch arged, closed conduit . These water meters incorporate devices which indicate the 
integrated volume.  
In addition to water meters that operate mechanically, the notified draft Mexican Official 
Standard also applies to electric and electronic water meters and  to mechanical water 
meters which include electronic devices, and which are used to measure the volume of cold 
potable water and hot water . It also applies to electronic auxiliary devices . In general, 
auxiliary devices are optional . However, it is possible  that, in line with international 
regulations, some auxiliary devices may become mandatory according to the use of water 
meters.  
7. Objective and rationale, including the nature of urgent problems where 
applicable : The notified draft Mexican Official Stan dard establishes the technical 
characteristics and pressure -loss requirements for water meters for cold potable water and 
hot water . It applies to water meters that can withstand:  
(a) a maximum admissible pressure of at least 1 MPa [0.6 MPa for meters using ducts with 
a nominal diameter of at least 500mm];  G/TBT/N/MEX/423  
- 2 - 
  (b) a maximum admissible temperature for cold potable water meters of 30°C;  
(c) a maximum admissible temperature for hot water m eters of up to 180°C, depending on 
class.  
8. Relevant documents:  
 NOM-008-SCFI-2002, Sistema general de unidades de medida (Mexican Official 
Standard NOM -008-SCFI-2002: General system of units of measurement), 
published in the Official Journal on 2 7 Novemb er 2002; 
 ISO 228 -1:2000 Pipe threads where pressure -tight joints are not made on the 
threads - Part 1 : Dimensions, tolerances and designation;  
 ISO 4064 -1:2014 Water meters for cold potable water and hot water -Part 1 : 
Metrological and technical requirements ; 
 ISO 7005 -2:1988 Metallic flanges -Part 2 : Cast iron flanges;  
 ISO 7005 -3:1988 Metallic flanges -Part 3 : Copper alloy and composite flanges.  
9. Proposed date of adoption : To be determined.  
Proposed date of entry into force : The notified Mexican Official Standard will enter into 
force 60 calendar days after publication as a final standard in the Official Journal.  
10. Final date for comments : 19 August 2 018 
11. Texts available from : National enquiry point [X] or address, telephone and fax 
numbers and emai l and website addresses, if available, of other body:  
Secretaría de Economía  (Ministry of the Economy)  
Subsecretaría de Competitividad y Normatividad (Under -Secretariat of Competitiveness 
and Standardization)  
Dirección General de Normas  (Directorate -Genera l of Standards)  
Tel.: (+52) 55 5729 9100, Ext. 43244  
Fax: (+52) 55 5520 9715  
Website: http://www.economia.gob.mx/comunidad -negocios/normalizacion/catalogo -
mexicano -de-normas  
Email: normasomc@economia.gob.mx  / sofia.pacheco@economia.gob.mx  / 
jose.ramosr@economia.gob.mx  
 
Text available from:  
http://www.dof.gob.mx/nota_detalle.php?codigo=5527062&fecha=20/06/2018  
 
https://members.wto.org/crnattachments/2018/TBT/MEX/18_ 3289_00_s.pdf