1、Designation:F30904(Reapproved 2010)Standard 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 r
2、evision.Anumber in 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:Pro
3、cedure 1Closed System(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 and health practices and determine
4、 the applica-bility of regulatory limitations prior to use.For hazard state-ments see Sections 4 and 5.2.Referenced Documents2.1 ASTM Standards:2F311 Practice for Processing Aerospace Liquid Samples forParticulate Contamination Analysis Using Membrane Fil-ters3.Summary of Practice3.1 Samples are wit
5、hdrawn 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 steel valves on e
6、ach 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 toxic and corrosive
7、 nature ofmost propellent 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 Stainless Steel Buc
8、ket.4.5 Miscellaneous Fittings,as needed for sample pointadaption.5.Hazards5.1 Care should be taken when handling 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
9、 cylinders must be clean,particulate-controlledin accordance with system requirements,and have a partialvacuum 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 val
10、ves and both sampling cylindervalves,and allow fluid to flow through the sampling cylinderfor 10 min.6.4 Close 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.6.6
11、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 atmosphe
12、ric pressure.1This practice is under the jurisdiction of ASTM Committee E21 on SpaceSimulation and Applications of Space Technology and is the direct responsibility ofSubcommittee E21.05 on Contamination.Current edition approved April 1,2010.Published May 2010.Originallyapproved in 1966.Last previou
13、s edition approved in 2004 as F309 04.DOI:10.1520/F0309-04R10.2For 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.Copy
14、right ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 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 and inlet va
15、lve ofthe sampling cylinder.7.4 Slowly open the outlet valve of the sampling cylinderand catch the overflow in a bucket.Adjust the valve until thecylinder is full.7.5 Close all three valves.7.6 Remove the sampling cylinder from system.7.7 Rinse the valve ends with demineralized water filteredthrough
16、 a 0.8 to 2.0-m absolute membrane.7.8 Replace the protective caps on the cylinder and sam-pling valves.7.9 Submit the full sampling cylinder for analysis.8.Precision and Bias8.1 Neither the precision nor the bias for this practice hasbeen determined.9.Keywords9.1 aerospace propellants;fluid sampling;samplingASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised t
