1、Designation: F1792 97 (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 adopti
2、on 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 gaseo
3、us 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 i
4、nformation 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 Gui
5、de 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
6、 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; Cast-ing Inspection and Repair for Machinery, Piping andProcess Vessels in Ships of the United States NavyMIL
7、-STD-271 Non-destructive Testing Requirements forMetalsMIL-P-46122 Plastic Molding and Extrusion Material,Polyvinylidene Fluoride Polymer and Copolymer3. Ordering Information3.1 Ordering documentation for valves under this specifica-tion shall include the following information, as required, todescri
8、be 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 fea
9、tures 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 appl
10、icable), 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
11、 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 (Kryto
12、x 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
13、 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/
14、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 Insti
15、tute (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 Se
16、ction D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.3 General Requirements:4.3.1 Fire PreventionValves shall be constructed to mini-mize the possibility of initiating i
17、gnition 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 co
18、ntact with oxygen shall be smoothwith well-rounded edges and without sharp or thin sectionedprotrusions (that is, all parts shall have a high ratio ofvolume-to-surface area). Sharp exterior corners are prohibited,and interior corners shall have fillets to prevent the retention orentrapment of machin
19、ing chips, burrs, or foreign material.4.3.1.3 Nonmetallic materials (O-rings, gaskets, etc.) otherthan the seating insert, if applicable, shall be well removedfrom the main flow path.4.3.2 Fire ContainmentValves shall be constructed tominimize oxygen escape in the event of an internal or externalfir
20、e. This shall be accomplished by the following:4.3.2.1 Pressure-Boundary SealingJoints for thepressure-boundary seals shall provide an effective barrier toleakage in the event of damage or consumption of thenon-metallic sealing elements by providing long, close fittingmetal-to-metal leakage or flame
21、 paths.4.3.2.2 Internal SeatingThe seat design shall be such thatin the event that the non-metallic seat is damaged, destroyed, orcarried away, there will be a secondary metal-to-metal seat tominimize through seat leakage. The construction and locationof the nonmetallic seals and seating inserts sha
22、ll minimize thepossibility of ignition under a pressure surge.4.3.2.3 Pressure SurgeValves shall be designed to preventpressure surge, which could cause auto-ignition.4.4 Design Features:4.4.1 Manual valves shall be of the packless design, with thestem sealed by a bellows.4.4.2 ThreadsThreads shall
23、conform to ANSI B1.1. Useof threads in contact with oxygen shall be minimized. Anythreads wetted by oxygen shall be of rolled construction orshall be completely chamfered and deburred to prevent thepossibility of sharp edges or machining burrs in contact withoxygen.4.4.3 CleaningPrior to assembly an
24、d testing, valves shallbe degreased and cleaned in accordance with Practice G93, andthereafter maintained clean for oxygen service.4.5 End PreparationUnless otherwise specified (see Sec-tion 3), end preparation for the valves shall be as follows:4.5.1 Valves shall be supplied with inline extension n
25、ippleswelded directly to the valve body or fabricated as an integralpart of the valve body. Nipples shall be of the same basicmaterial as the body. The length and schedule of these nipplesshall be as specified in Table 1.4.6 Welding and Nondestructive TestingWelding and non-destructive testing shall
26、 be in accordance with ASME Boilerand Pressure Vessel Code, Sections VIII and IX.5. Marking5.1 Identification PlatesA metallic corrosion-resistingidentification plate shall be securely attached to the valve andshall indicate “Valve specially made for oxygen service”.5.2 In addition, each valve shall
27、 be marked in accordancewith their applicable primary valve specification requirements.6. Quality Assurance System6.1 The manufacturer shall establish and maintain a qualityassurance system that will ensure all the requirements of thisspecification are satisfied.6.2 Awritten description of the quali
28、ty assurance system themanufacturer will use shall be available for review andacceptance by the inspection authority.6.3 The purchaser reserves the right to witness any tests andinspect the valves in the manufacturers plant to the extentspecified on the purchase order.SUPPLEMENTARY REQUIREMENTSOne o
29、r more of the following supplementary requirements S1, S2, S3, or S4 shall be applied onlywhen specified by the purchaser in the inquiry, contract, or order. Details of those supplementaryrequirements shall be agreed upon in writing by the manufacturer and purchaser. Supplementaryrequirements shall
30、in no way negate any requirement of the specification itself.S1. Supplemental TestsS1.1 Supplemental tests shall be conducted at a laboratorysatisfactory to the customer and shall consist of the examina-tions and tests selected from those specified in S1.2 throughS1.4.S1.2 Examination Prior to Testi
31、ngThe valve(s) shall beexamined visually to determine conformance with the orderingdata, dimensions, and workmanship without disassembly.S1.3 Nonmetallic Materials Compatibility TestMaterialsshall be subjected to the ozone-resistance and oxygen-bombtests as specified in MIL-V-5027, with test pressur
32、e applicableto the valve under test. No charring or deterioration is allowed.S1.4 Nondestructive TestingNondestructive testing shallbe in accordance with MIL-STD-271.TABLE 1 Length and Schedule of Extension NipplesSize of Valve Pipe ScheduleMinimum Lengthof Extension,inches (ValveCenter to End)14 NP
33、S to 1 NPS (13.5 mm to 33.7 mm) 80 7.00 (178 mm)1-12 NPS to 2-12 NPS (48.3 mm to 73.0 mm) 160 12.0 (305 mm)F1792 97 (2010)2S2. Cleaning, Drying, Packaging, and MarkingRequirementsS2.1 Valves shall be cleaned, dried, packaged, and markedin accordance with MIL-STD-1330. Packaging operationsshall be ac
34、complished in an area that will prevent valvecontamination by hydrocarbons.S3. Quality AssuranceS3.1 Scope of WorkThe written description of the qualityassurance system shall include the scope and locations of thework to which the system is applicable.S3.2 Authority and ResponsibilityThe authority a
35、nd re-sponsibility of those in charge of the quality assurance systemshall be clearly established.S3.3 OrganizationAn organizational chart showing therelationship between management and the engineering, pur-chasing, manufacturing, construction, inspection, and qualitycontrol groups is required. The
36、purpose of this chart is toidentify and associate the various organizational groups withthe particular functions for which they are responsible. Theserequirements are not intended to encroach on the manufactur-ers right to establish, and from time to time to alter, whateverform of organization the m
37、anufacturer considers appropriatefor its work. Persons performing quality control functions shallhave a sufficiently well-defined responsibility and the authorityand the organizational freedom to identify quality controlproblems and to initiate, recommend, and provide solutions.S3.4 Review of Qualit
38、y Assurance SystemThe manufac-turer shall ensure and demonstrate the continuous effectivenessof the quality assurance system.S3.5 Drawings, Design Calculations, and SpecificationControlThe manufacturers quality assurance system shallinclude provisions to ensure that the latest applicable drawings,de
39、sign calculations, specifications, and instructions, includingall authorized changes, are used for manufacture, examination,inspection, and testing.S3.6 Purchase ControlThe manufacturer shall ensure thatall purchased material and services conform to specifiedrequirements and that all purchase orders
40、 give full details of thematerial and services ordered.S3.7 Material ControlThe manufacturer shall include asystem for material control that ensures the material received isproperly identified and that any required documentation ispresent, identified to the material, and verifies compliance tothe sp
41、ecified requirements. The material control system shallensure that only the intended material is used in manufacture.The manufacturer shall maintain control of material during themanufacturing process by a system that identified inspectionstatus of material throughout all stages of manufacture.S3.8
42、Manufacturing ControlThe manufacturer shall en-sure that manufacturing operations are carried out undercontrolled conditions utilizing documented work instructions.The manufacturer shall provide for inspection, where appro-priate, for each operation that affects quality or shall arrange anappropriat
43、e monitoring operation.S3.9 Quality Control PlanThe manufacturers qualitycontrol plan shall describe the fabrication operations, includingexaminations and inspections.S3.10 WeldingThe quality control system shall includeprovisions for ensuring that welding conforms to specifiedrequirements. Welders
44、shall be qualified to the appropriatestandards and the qualification records shall be made availableto the inspection authority if required.S3.11 Nondestructive ExaminationProvisions shall bemade to utilize non-destructive examination, as necessary, toensure that material and components comply with
45、the specifiedrequirements. Non-destructive examinations shall be autho-rized by their employer and/or qualified by a recognizednational body, and their authorizations/qualification recordsshall be made available to the inspection authority if required.S3.12 Non-Conforming ItemsThe manufacturer shall
46、 es-tablish procedures for controlling items not in conformancewith the specified requirements.S3.13 Heat TreatmentThe manufacturer shall providecontrols to ensure that all required heat treatments have beenapplied. Means should be provided by which heat treatmentrequirements can be verified.S3.14 I
47、nspection StatusThe manufacturer shall maintain asystem for identifying the inspection status of material duringall stages of manufacture and shall be able to distinguishbetween inspected and non-inspected material.S3.15 Calibration of Measurement and Test EquipmentThe manufacturer shall provide, co
48、ntrol, calibrate, and main-tain inspection, measuring and test equipment to be used inverifying conformance to the specified requirements. Suchcalibration shall be traceable to a national standard andcalibration records shall be maintained.S3.16 Records MaintenanceThe manufacturer shall havea system
49、 for the maintenance of inspection records, radio-graphs, and manufacturers data reports that describe theachievement of the required quality and the effective operationof the quality system.S3.17 Sample FormsThe forms used in the quality controlsystem and any detailed procedures for their use shall beavailable for review. The written description of the qualityassurance system shall make reference to these forms.S3.18 Inspection AuthorityThe manufacturer shall makeavailable to the inspection authority at the manufacturers planta current copy
