ASTM_F_1792_-_97_2010.pdf

Designation:F179297(Reapproved 2010)An American National StandardStandard Specification forSpecial Requirements for Valves Used in Gaseous OxygenService1This standard is issued under the fixed designation F1792;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.1.Scope1.1 This specification covers the special requirements forvalves used in gaseous oxygen service.It is intended that thisspecification be invoked as an additional requirement inconjunction with primary valve specifications.1.2 The values stated in this specification in inch-poundunits are to be regarded as the standard.The SI equivalentshown in parenthesis are provided for information only.2.Referenced Documents2.1 ASTM Standards:2G63 Guide for Evaluating Nonmetallic Materials for Oxy-gen ServiceG88 Guide for Designing Systems for Oxygen ServiceG93 Practice for Cleaning Methods and Cleanliness Levelsfor Material and Equipment Used in Oxygen-EnrichedEnvironmentsG94 Guide for Evaluating Metals for Oxygen Service2.2 American National Standards Institute(ANSI):3ANSI B1.1 Unified Screw Threads2.3 American Society of Mechanical Engineers(ASME):4ASME Boiler and Pressure Vessel Code2.4 Military Standards and Specifications:5MIL-STD-1330 Standard Practice for Precision Cleaningand Testing of Shipboard Oxygen,Helium,Helium-Oxygen,Nitrogen,and Hydrogen SystemsMIL-V-5027 Valves,Check,Oxygen,High PressureMIL-STD-278 Fabrication,Welding and Inspection;CastingInspection and Repair for Machinery,Piping and ProcessVessels in Ships of the United States NavyMIL-STD-271 Non-destructive Testing Requirements forMetalsMIL-P-46122 Plastic Molding and Extrusion Material,Poly-vinylidene Fluoride Polymer and Copolymer3.Ordering Information3.1 Ordering documentation for valves under this specifica-tion shall include the following information,as required,todescribe the equipment adequately.3.1.1 ASTM designation and year of issue.3.1.2 Primary valve specification(see 1.1).3.1.3 End preparations,if different than specified in 4.4.3.1.4 Supplementary requirements,if any(see S1 throughS4).4.Valve Design and Construction4.1 Valves shall incorporate the features specified in 4.2-4.6.4.2 Materials of ConstructionMaterial requirements shallbe as follows:4.2.1 The pressure containing/retaining envelope(includingany bolting,union nuts,or other fastening devices establishingthe integrity of the pressure containing/retaining envelope),bellows(where applicable),and end nipples,shall be nickel-copper(70-30).Internal trim which is in contact with the linemedia shall be nickel-copper(70-30),bronze,nickel-aluminum-bronze,Inconel Alloy 600,brass,or other materialswhich are compatible with oxygen service.4.2.2 Non-metallic seat,seat insert,or seals.These materialsshall be selected from TFE,Reinforced TFE,CTFE,plastic inaccordance with MIL-P-46122,Polyamide(Vespel),or PEEK.The materials for O-rings and gaskets shall be compatible foroxygen service.4.2.3 LubricantsMaterials for lubricants shall be halocar-bon(25-5S),Dupont(Krytox 240 AC,240 AZ),Braycote 601,or other lubricants compatible with oxygen service.4.2.4 Guidance on the selection of materials for oxygenservice can be found in Guides G63 and G94.Guidance ondesigning systems for oxygen service can be found in GuideG88.1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved May 1,2010.Published June 2010.Originallyapproved in 1997.Last previous edition approved in 2004 as F1792-97(2004).DOI:10.1520/F1792-97R10.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Three Park Ave.,New York,NY 10016-5990,http:/www.asme.org.5Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.3 General Requirements:4.3.1 Fire PreventionValves shall be constructed to mini-mize the possibility of initiating ignition in gaseous oxygenservice.This shall be accomplished by the following:4.3.1.1 Materials for parts in contact with oxygen shall havethe highest spontaneous ignition temperatures and the lowestimpact sensitivities compatible with construction and perfor-mance limitations.4.3.1.2 Surfaces in cont