ASTM_D_2158_-_16ae1.pdf

Designation:D215816a1Standard Test Method forResidues in Liquefied Petroleum(LP)Gases1This standard is issued under the fixed designation D2158;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEThe IP designation was removed editorially in February 2018.1.Scope*1.1 This test method covers the determination of extraneousmaterials weathering above 38 C that are present in liquefiedpetroleum gases.The extraneous materials will generally bedissolved in the LPG,but may have phase-separated in someinstances.1.2 Liquefied petroleum gases that contain certain anti-icingadditives can give erroneous results by this test method.1.3 Although this test method has been used to verifycleanliness and lack of heavy contaminants in propane formany years,it might not be sensitive enough to protect someequipment from operational problems or increased mainte-nance.A more sensitive test,able to detect lower levels ofdissolved contaminants,could be required for some applica-tions.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D96 Test Method for Water and Sediment in Crude Oil byCentrifuge Method(Field Procedure)(Withdrawn 2000)3D1796 Test Method for Water and Sediment in Fuel Oils bythe Centrifuge Method(Laboratory Procedure)D1835 Specification for Liquefied Petroleum(LP)GasesE1137 Specification for Industrial Platinum Resistance Ther-mometersE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision LiquidsE2877 Guide for Digital Contact Thermometers3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 oil stain observation,nthe volume of solvent-residue mixture required to yield an oil stain or ring thatpersists for 2 min under specified conditions on absorbentpaper.3.1.2 residue,nthe volume,measured to the nearest0.05 mL,of the residual material boiling above 38 C resultingfrom the evaporation of 100 mL of sample under the specifiedconditions of this test method.3.1.3 solvent-residue mixture,na mixture(solution)of10 mL of solvent with any residue remaining in the centrifugetube at the conclusion of the first step in this test method.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.H0 on Liquefied Petroleum Gas.Current edition approved Dec.15,2016.Published January 2017.Originallyapproved in 1963.Last previous edition approved in 2016 as D2158 16.DOI:10.1520/D2158-16AE01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.Summary of Test Method4.1 A 100 mL sample of liquefied petroleum gas is weath-ered in a 100 mL centrifuge tube.The volume of residueremaining after heating the tube to 38 C is measured andrecorded.4.2 To dissolve any residue,10 mLof solvent is added to thecentrifuge tube.Small,measured volumes of solvent-residuemixture are deposited on an absorbent paper in a specifiedmanner.The appearance of the absorbent paper to which theresidue solution has been added in measured increments isobserved and recorded.5.Significance and Use5.1 Control over the residue content(required by Specifica-tion D1835)is of considerable importance in end-use applica-tions of LPG.In liquid feed systems,residues can lead totroublesome deposits and,in vapor withdrawal systems,