G/TBT/N/UGA/962  
 
18 October 2018  
(18-6512) 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: UGANDA   
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible: Uganda National Bureau of Standards  
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:   
3. Notified under Article 2.9.2 [  ], 2.10.1 [  ], 5.6.2 [ X], 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): Engine 
oils; Lubricating preparations (including cutting -oil preparations, bolt or nut release 
preparations, anti -rust or anti -corrosion preparations and mould release preparations, 
based on lubricants) and preparations of a kind used for the oil or grease treatment of 
textile materials, leather, furskins or other materials, but excluding preparations 
containing, as b asic constituents, 70% or more by weight of petroleum oils or of oils 
obtained from bituminous minerals. (HS 3403). Lubricants, industrial oils and related 
products (ICS 75.100).  
5. Title, number of pages and language(s) of the notified document: DUS 2074 :2018, 
Standard test method for determination of yield stress and apparent viscosity of engine 
oils at low temperature, First Edition. (27 page(s), in English)   
6. Description of content: This Draft Uganda Standard covers the test method for the 
measureme nt of the yield stress and viscosity of engine oils after cooling at controlled 
rates over a period exceeding 45  h to a final test temperature between -10°C and -40°C. 
The precision is stated for test temperatures from -40°C to -15°C. The viscosity 
measure ments are made at a shear stress of 525  Pa over a shear rate of 0.4s -1 to 15 s-1. 
The viscosity as measured at this shear stress was found to produce the best correlation 
between the temperature at which the viscosity reached a critical value and borderline  
pumping failure temperature in engines.  
This test method contain two procedures: Procedure A incorporates several equipment 
and procedural modifications from Test Method D4684 -02 that have shown to improve 
the precision of the test, while Procedure B is u nchanged from Test Method D4684 -02. 
Additionally, Procedure A applies to those instruments that utilize thermoelectric cooling 
technology or direct refrigeration technology of recent manufacture for instrument 
temperature control. Procedure B can use the s ame instruments used in Procedure A or 
those cooled by circulating methanol.  
 Procedure A of this test method has precision stated for a yield range from less than 
35 Pa to 210  Pa and apparent viscosity range from 4300  mPas to 270  000 mPas. 
The test proced ure can determine higher yield stress and viscosity levels.  This test 
method is applicable for unused oils, sometimes referred to as fresh oils, designed for 
both light duty and heavy duty engine applications. It also has been shown to be suitable 
for used  diesel and gasoline engine oils. The applicability to petroleum products other 
than engine oils has not been determined.  G/TBT/N/UGA/962  
 
- 2 - 
 
  7. Objective and rationale, including the nature of urgent problems where 
applicable: Prevention of deceptive practices and consumer protection; Harmonization  
8. Relevant documents:   
1. ISO 17025  General Requirements for the Competence of Testing and Calibration 
Laboratories  
2. ISO Guide 34  General Requirements for the Competence of Reference Material 
Producers  
3. ASTM D3829 -18 Standard Test Me thod for Predicting the Borderline Pumping 
Temperature of Engine Oil  
4. ASTM E563 -11(2016) Standard Practice for Preparation and Use of an Ice -Point 
Bath as a Reference Temperature  
5. ASTM E644 -11 Standard Test Methods for Testing Industrial Resistance 
Thermomet ers 
6. ASTM E1137/E1137M -08(2014) Standard Specification for Industrial Platinum 
Resistance Thermometers  
7. ASTM E2877 -12e1 Standard Guide for Digital Contact Thermometers  
9. Proposed date of adoption:  December 2018  
Proposed date of entry into force:  Not applicable  
10. Final date for comments: 60 days from notification  
11. Texts available from: National enquiry point [X] or address, telephone and fax 
numbers and email and website addresses, if available, of other body: