G/TBT/N/UGA/1639  
1 July 2022  
(22-5108) 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  
Plot 2 -12 ByPass Link, Bweyogerere Industrial and Business Park  
P.O. Box 6329  
Kampala, Uganda  
Tel: +(256) 4 1733 3250/1/2  
Fax: +(256) 4 1428 6123  
E-mail: info@unbs.go.ug  
Website: https://www.unbs.go.ug  
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 [  ], 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):  Petroleum 
gases and other gaseous hydrocarbons. (HS code(s): 2711); Fuels (ICS code(s): 75.160), 
Gaseous Fuels  
5. Title, number of pages and language(s) of the notified document:  DUS 2535:2022, 
Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density 
of Gaseous Fuels, First Edition; (26 page(s), in English)  
6. Descrip tion of content:  This Draft Uganda Standard covers procedures for calculating 
heating value, relative density, and compressibility factor at base conditions (14.696 psia 
and 60°F (15.6°C)) for natural gas mixtures from compositional analysis.2 It applies t o 
all common types of utility gaseous fuels, for example, dry natural gas, reformed gas, oil 
gas (both high and low Btu), propane -air, carbureted water gas, coke oven gas, and retort 
coal gas, for which suitable methods of analysis as described in Section 6 are available. 
Calculation procedures for other base conditions are given.  
7. Objective and rationale, including the nature of urgent problems where 
applicable:  Prevention of deceptive practices and consumer protection; Quality 
requirements  G/TBT/N/UGA/1639  
 
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  8. Relevant documents:   
1. D1717  
2. D1945  
3. D1946  
4. D2163  
5. D2650  
6. GPA 2145 Physical Constants for the Paraffin Hydrocarbons and Other 
Components in Natural Gas  
7. GPA Standard 2166 Methods of Obtaining Natural Gas Samples for Analysis by 
Gas Chromatography  
8. GPA 2172 Calculation of Gross Heating Value, Relative Density, and 
Compressibility Factor for Natural Gas Mixtures from Compositional Analysis  
9. GPA Standard 2261 Method of Analysis for Natural Gas and Similar Gaseous 
Mixtures by Gas Chromatography  
10. GPA Technical Publication TP -17 Table of Physical Properties of Hydrocarbons for 
Extended Analysis of Natural Gases  
11. GPSA Data Book, Fig. 23 -2, Physical Constants  
12. TRC Thermodynamic Tables —Hydrocarbons  
ANSI Z 132.1 -1969: Base Conditions  of Pressure and Temperature for the 
Volumetric Measurement of Natural Gas  
9. Proposed date of adoption:  To be determined  
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:   
Uganda National Bureau of Standards  
Plot 2 -12 ByPass Link, Bweyogerere  Industrial and Business Park  
P.O. Box 6329  
Kampala, Uganda  
Tel: +(256) 4 1733 3250/1/2  
Fax: +(256) 4 1428 6123  
E-mail: info@unbs.go.ug  
Website: https://www.unbs.go.ug