1、Designation:F30918Standard Practice forLiquid Sampling of Noncryogenic Aerospace Propellants1This standard is issued under the fixed designation F309;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber i
2、n parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers procedures for obtaining a sampleof noncryogenic aerospace propellant.Two procedures arecovered as follows:Procedure 1Closed Sy
3、stem(Section 6),andProcedure 2Open-End Procedure(Section 7).1.2 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 t
4、he applicability of regulatory limitations prior to use.For hazard statements see Sections 4 and 5.1.3 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
5、 Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2F311 Practice for Processing Aerospace Liquid Samples forParticulate Contamination Analysis Using Membrane Fil-ters3.Summary of Practice3.1
6、 Samples are withdrawn from the system by(1)a closedvessel capture,and(2)an open-end vessel(see Fig.1).Bothprocedures are practical for most liquid aerospace propellantsnot excessively corrosive or toxic.4.Apparatus4.1 Stainless Steel Pressure Sampling Cylinders,1-Lcapacity,equipped with stainless s
7、teel valves on each end.4.1.1 CautionPressure sampling cylinders must bemarked for the liquid being sampled.Cylinders for onematerial must not be interchanged with sampling cylinders ofother materials because of the possibility of incompatibility.4.2 Full Protective Suits.4.2.1 CautionDue to the tox
8、ic and corrosive nature ofmost propellant fluids and their vapors,extreme care must beexercised in handling.Full protective suits must be worn whensampling these fluids.4.3 Polyethylene Wash Bottle,1-L capacity,filled withdemineralized water,filtered in the manner described in Prac-tice F311.4.4 Sta
9、inless Steel Bucket.4.5 Miscellaneous Fittings,as needed for sample pointadaption.4.5.1 CautionEnsure all fittings are compatible with thepropellant being sampled.(This includes but is not limited tothe metals and soft goods,such as o-rings,valves,seals,etc.)5.Hazards5.1 Care should be taken when ha
10、ndling propellants sincemost of them are toxic to some degree.Care should also betaken when sampling fluids from a system under dynamicconditions.PROCEDURE 1CLOSED SYSTEM6.Procedure6.1 Sampling cylinders must be clean,particulate-controlledin accordance with system requirements,and have a partialvac
11、uum of 10%of atmospheric pressure.6.2 After removing protective caps,connect both ends of thesampling cylinder to the system sampling ports,using fittingsas necessary.6.3 Open both sampling valves and both sampling cylindervalves,and allow fluid to flow through the sampling cylinderfor 10 min.6.4 Cl
12、ose all four valves downstream side first,and removethe sampling cylinder from the system.6.5 Rinse the valve ends with demineralized water filteredthrough a 0.8 to 2.0-m absolute membrane.1This practice is under the jurisdiction of ASTM Committee E21 on SpaceSimulation and Applications of Space Tec
13、hnology and is the direct responsibility ofSubcommittee E21.05 on Contamination.Current edition approved Nov.1,2018.Published November 2018.Originallyapproved in 1966.Last previous edition approved in 2018 as F309 04(2018).DOI:10.1520/F0309-18.2For referenced ASTM standards,visit the ASTM website,ww
14、w.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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis internati
15、onal 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.
16、1 6.6 Replace the protective caps on the sampling cylinderand sampling valves.6.7 Submit the full sampling cylinder for analysis.PROCEDURE 2OPEN-END PROCEDURE7.Procedure7.1 Sampling cylinders must be clean and particulate-controlled in accordance with system requirements,and have avacuum of 10%of atmospheric pressure.7.2 After removing protective caps,connect the samplingcylinder to the sampling valve of the system and inlet valve ofthe sampling cylinder.7.3 Open the sampling valve of the system