FOR STUDY ONLY 
 
 
 
 
 
 
 
 
النهائيةالمسودة  
 
 
 
 
 
خليط البروبان والبيوتان – المسال البترولي الغاز  
Liquified Petroluem Gas- propane butane mixture  
 
 
 
 
 
 إعداد
 دائرة المواصفات 
 المديرية العامة للمواصفات والمقاييس
وزارة التجارة والصناعة  
 
 
ICS:75:160. 30 
 
 
هذه الوثيقة مشروع  مواص فة قياسية ع مانية        تم توزيعها 
لإبداء الرأي والملحوظات بشأنها، لذلك فإنها عرضة 
للتغيير والتبديل، ولا يجوز الرجوع إليها كمواصفة  قياسية 
ع مانية        إلا بعد اعتمادها. 
 This document is  a draft Omani  standard  
circulated for comments. It is, therefore, 
subject to alt eration and modification and 
may not be referred to as a n Omani  
standard  until is approved.  
 
 
FOR STUDY ONLYOma ni Standard   OS:       /201 9 
1 
  
 تقديم
المديرية العامة للمواصفات والمقاييس جهاز التقييس الوطني بالسلطنة أنشئت بموجب المرسوم السلطاني رقم 93/1391،ومن  
مهامها إعداد المواصفات ا لقياسية العمانية واللوائح الفنية إستنادا  للمرسوم السلطاني رقم                                                               1/79 
وقد قامت دائرة المواصفات  بالمديرية  بإعداد هذه المواصفة القياسية العمانية " الغاز البترولي المسال – خليط البروبان والبيوتان " 
وقد تم إعداد المشروع باللغة الإنجليزية بعد إستعراض المواصفات الق ياسية العربية  والأجنبية والدولية والمؤلفات المرجعية ذات 
الصلة. 
 م/  /  الموافق  ، ه/   /   وقـد اعتمدت هذة المواصفة كـمواصفة قياسية عمانية بتاريخ  
 
 
Forward  
General Directorate of Standardization and Metrology (DGSM) is the National standard body in 
Sultan ate of Oman. It was established according to RoyalDecree No. 39/1976. DGSM is 
responsible of issuing Omani standards and technical regulations.  
Director of standards, in the DGSM has prepared this standard “ Liquified Petrolu em Gas - propane 
butane mixture . The draft standard has been prepared in English language based on relevant 
international and National foreign standard and references,  
This standards was approve d as an Omani Standard on /       /    H,    /   /     G  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 FOR STUDY ONLYOma ni Standard   OS:       /201 9 
2 
 Liquified Petrolu em Gas - propane butane mixture  
1. Scope : 
This Omani  Standard is concerned with specification and requirement for the  Propane & Butane  
mixture used as domestic  or industrial  heating  fuel. 
NOTE: For the purposes of this Standard, the terms “% (m/m)” and “% (V/V )” are used to 
represent the mass fraction and the volume fraction respectively.  
2. Complementary References : 
2.1 GSO 60/1987 Industrial Safty and He alth Reqairments -Liquified Petroluem Gas . 
2.2 GSO 673/1997: Methods of Testing Liquefied Petroleum Gases(LPG) - A mixtu re of 
Commercial Propane and Butane.  
2.3 ASTM D1838 -16 : Standard Test Method for Copper Strip Corrosion by Liquefied 
Petroleum (LP) Gases.  
2.4 ASTM D6667 -14:Test Method for Determination of Total Volatile Sulfur in Gaseous 
Hydrocarbons and Liquefied Petroleum Gas es by Ultraviolet Fluorescence.  
2.5 IP 272 : Determination of Mercaptan and Hydrogen Sulphide content of LPG –
electrometric titration method.  
2.6 UOP  212-05 :Determination of Hydrogen Sulphide, Mercaptan Sulphur and Carbonyl 
Sulphide in Hydrocarbon Gases by Potenti ometric Titration.  
2.7 GSO ASTM D2420 -13(2018) :Standard test method for hydrogen sulfide in liquefied 
Petroleum (LP) gases (lead acetate method) . 
2.8 ASTM D 5504 -12:  Standard Test Method for Determination of Sulfur Compounds in 
Natural Gas and Gaseous Fuels by Ga s Chromatography and Chemiluminescence . 
2.9 ASTM D2784 -11: Standard Test Method for Sulfur in Liquefied Petroleum Gases 
(Oxy -Hydrogen Burner or Lamp) . 
2.10 ASTM D1266 -18: Standard Test Method for Sulfur in Petroleum Products (Lamp 
Method).  
2.11 ASTM D 2598 -16: Practice for calculation of certain Physical Properties of LPG from 
compositional analysis.  
2.12 ASTM D1267 -12:Standard Test Method for Gage Vapor Pressure of Liquefied 
Petroleum (LP) Gases (LP -Gas Method) . 
2.13 ASTM D6897 – 16:Standard Test Method for Vapor Pressure of Liqu efied Petroleum 
Gases (LPG) (Expansion Method) . 
2.14 GSO ASTM D1837 -17: Standard test method for volatility of liquefied petroleum (LP) 
gases  FOR STUDY ONLYOma ni Standard   OS:       /201 9 
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 2.15 GSO ASTM D2158 -16:Standard test method for residues in liquefied petroleum (LP) 
gases . 
2.16 ASTM D2163 - 14e1: Standard Test  Method for Determination of Hydrocarbons in 
Liquefied Petroleum (LP) Gases and Propane/Propene Mixtures by Gas 
Chromatography . 
2.17 GSO ISO 4257/2008: Liquefied petroleum gases - Method of sampling . 
2.18 ASTM D3700 - 16 :Standard Practice for Obtaining LPG Samples Using a Floating 
Piston Cylinder.  
2.19 ASTM D1265 - 11(2017)e1:Standard Practice for Sampling Liquefied Petroleum (LP) 
Gases, Manual Method  
3. Defin ition s: 
3.1 Liquid Petroleum Gas (LPG):A mixture of hydrocarbons principally propane and butane 
obtained from refinery g ases, Natural Gas Liquid Condensate, Heavy Oil etc which can be 
stored and handled as liquid at ambient temperature and moderate pressure LPG can be 
used for  domestic,commercial and industrial .  
3.2  PB mixtures, n —mixtures of propane and butane for use where  intermediate volatility is 
required.  
 
4. Characteristics : 
4.1 It should be stored as liquid and used as gas.  
4.2 It should be suitable for use as domestic and industrial fuel.  
4.3 It should be free from water and sediments.  
4.4 Odour: The distinctive smell that people assoc iate with LPG is actually added to it as a 
safety measure.Without the  addition of an odourant, leaking gas could collect without 
being detected.( Mercaptan  sulphate or Ethyl Mercaptan,  can be  used as an od ourent ) 
4.5 it should not conflict with standard in 2 .1. 
4.6 It should comply with the requirements covered by Table of “The  Characteristics and 
Requirements for LPG”.  
 
5. Sampling Method  
Samples should be obtained from storage tanks for testing and inspection in accordance with 
standard s of sampling mentioned in 2.17 or 2.18 or 2.19.    
 
 FOR STUDY ONLYOma ni Standard   OS:       /201 9 
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Table of “The Characteristics and Requirements for LPG”  
PROPERTY   UNITS  LIMITS  TEST METHOD  
Copper Corrosion 1 h @ 37.8 °C  __ Max 1  ASTM D1838  
GSO 673  
Free Water  __ NONE  visual  
Total Mercaptan  mg/kg 
(ppm)  Min  15  
Max 60    
UOP21 2 
IP 272  
Hydrog en sulphid e  mg/kg 
(ppm)  pass or 
Negative  UOP 212  
ASTM D2420  
Total Sulphur  mg/kg(ppm)  Max 140 ASTM D6667  
GSO 673  
ASTM D 5504  
ASTM D2784  
ASTM D1266  
Density at 15°C or relative density 
at 15.6/15.6 °C (60/60 °F ) kg/l  Report  ASTM D2598  
Vapour Pressure at 37.8 °C  kpa Max700  GSO 673  
ASTM D 2598  
ASTM D1267  
 ASTM D6897  Kpa (g) Max 670  
Volatile Residue:  
Evaporated Temperature  @95%,  °C  Max 2.2  
ASTM D1837  
Hydrocarbon Composition  
Methane  
Liq vol %  report   
Ethane  Max 2.0  
ASTM D 216 3 Propane  Max  42 
Butane  Report  
Pentane and Heavier  vol %   Max 2.0   ASTM D2163  
 
 
 
*NOTE: requirement of Mercaptan is: to detect the Odour.  
 
 
 
 FOR STUDY ONLYOma ni Standard   OS:       /201 9 
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Abbreviation  
1. GSO : Gulf Standardization Organization  
2. ASTM:  American Society for Testing and Materials.  
3. ISO: International Organization for Standardization . 
4. IP TEST METHODS:  The E nergy Publication institution  develop  and publish  
international test method  standards  known as IP Test Methods) for petroleum and related 
products.  
References:  
1. ASTM D1835 – 16: Sta ndard Specification for Liquefied Petroleum (LP) Gases.  
www.astm.org  
 
2. GSO 672/2010 : Petroleum liqefied Gas -mixture of commercial propane and butane.  
www.gso.org.sa