ASTM F2178-2017b Standard Test Method for Determining the Arc Rating and Standard Specification for Eye or Face Protective Products《测定眼睛或者面部防护产品的耐电弧热性能和标准规格的标准试验方法》.pdf
《ASTM F2178-2017b Standard Test Method for Determining the Arc Rating and Standard Specification for Eye or Face Protective Products《测定眼睛或者面部防护产品的耐电弧热性能和标准规格的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM F2178-2017b Standard Test Method for Determining the Arc Rating and Standard Specification for Eye or Face Protective Products《测定眼睛或者面部防护产品的耐电弧热性能和标准规格的标准试验方法》.pdf(14页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: F2178 17bStandard Test Method forDetermining the Arc Rating and Standard Specification forEye or Face Protective Products1This standard is issued under the fixed designation F2178; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、 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 test method and product specification is used tomeasure the arc rating and specify the req
3、uirements forproducts intended for use as eye or face protection for workersexposed to electric arcs that would generate heat flux valuesfrom 84 to 25 120 kWm22 to 600 cal/cm2s. Products aretested as sold.1.2 This test method determines an arc rating for eye or faceprotective products. The faceshiel
4、d, safety spectacle, goggle oror other applicable portions of the complete product must meetANSI Z87.1. This excludes the textile or non ANSI Z87.1testable parts of the hood assemblies or other tested products.This standard does not measure optical and impact properties(seeANSI Z87.1) but does speci
5、fy requirements for optical andimpact properties.1.3 The materials covered by this standard are in the form offaceshields attached to the head by protective helmets (hardhats), headgear, hood assemblies, safety spectacles or goggles.Faceshields, safety spectacles or goggles are tested with orwithout
6、 other face and head protective products, for example,sock hoods, balaclavas, sweat shirt hoods or jacket hoods.1.3.1 Fabric layers used in the design of face protectionproducts such as in hood, neck guards, balaclava, shall meetthe requirements of Specification F1506. When fabrics aredesigned into
7、the protection provided for eye or face protectiveproducts, the arc rating of fabric system shall be determinedfirst by Test Method F1959/F1959M.1.3.2 The arc rating of the eye or face protective productwhich requires fabric to provide protection to the face or headwill not be higher than the lower
8、arc rating of either the fabricsystem or the shield/visor assembly.1.4 This test method shall be used to measure and describethe properties of materials, products, or assemblies in responseto convective and radiant energy generated by an electric arcunder controlled laboratory conditions and does no
9、t purport topredict damage from light other than the thermal aspectsmeasured.1.5 The values stated in SI units shall be regarded asstandard except as noted. Within the text, alternate units areshown in brackets.The values stated in each system may not beexact equivalents; therefore, alternate system
10、s must be usedindependently of the other. Combining values from the systemsdescribed in the text may result in nonconformance with themethod.1.6 This standard does not purport to describe or appraisethe effect of the electric arc fragmentation explosion andsubsequent molten metal splatter, which inv
11、olves the pressurewave containing molten metals and possible fragments of othermaterials except to the extent that heat energy transmission dueto these arc explosion phenomena is reduced by test specimens.1.7 This standard shall not be used to describe or appraisethe fire hazard or fire risk of mate
12、rials, products, or assembliesunder actual fire conditions. However, results of this test maybe used as elements of a fire assessment which takes intoaccount all of the factors which are pertinent to an assessmentof the fire hazard of a particular end use.1.8 This standard does not purport to addres
13、s 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.Forspecific precautions, see Section 7.1.9
14、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 Tra
15、de (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:21This test method is under the jurisdiction of ASTM Committee F18 onElectrical Protective Equipment for Workers and is the direct responsibility ofSubcommittee F18.65 on Wearing Apparel.Current edition approved Oct. 1, 2017. Published Nov
16、ember 2017. Originallyapproved in 2002. Last previous edition approved in 2017 as F2178 17a. DOI:10.1520/F2178-17B.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 t
17、he standards Document Summary page onthe ASTM website.Copyright 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
18、the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1C177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarde
19、d-Hot-Plate ApparatusD123 Terminology Relating to TextilesD3776 Test Methods for Mass Per Unit Area (Weight) ofFabricD4391 Terminology Relating to The Burning Behavior ofTextilesE457 Test Method for Measuring Heat-Transfer Rate Usinga Thermal Capacitance (Slug) CalorimeterF1494 Terminology Relating
20、to Protective ClothingF1506 Performance Specification for Flame Resistant andArc Rated Textile Materials for Wearing Apparel for Useby Electrical Workers Exposed to Momentary ElectricArcand Related Thermal HazardsF1958/F1958M Test Method for Determining the Ignitabil-ity of Non-flame-Resistant Mater
21、ials for Clothing byElectric Arc Exposure Method Using MannequinsF1959/F1959M Test Method for Determining theArc Ratingof Materials for Clothing2.2 ANSI/IEEE Standards:IEEE Standard Dictionary of Electrical and ElectronicsTerms3ANSI Z87.1-2003 Practice for Occupational and Educa-tional Eye and Face
22、Protection43. Terminology3.1 DefinitionsFor definitions of other textile terms usedin this method, refer to terminology in Terminology D123,D4391, F1494 and the IEEE Standard Dictionary of Electricaland Electronics Terms.3.2 Definitions of Terms Specific to This Standard:3.2.1 afterflame, npersisten
23、t flaming of a material after theignition source has been removed.3.2.2 afterflame time, nthe length of time for which amaterial continues to flame after the ignition source has beenremoved.3.2.3 arc duration, ntime duration of the arc, s.3.2.4 arc energy, vi dt, nsum of the instantaneous arcvoltage
24、 values multiplied by the instantaneous arc currentvalues multiplied by the incremental time values during thearc, J.3.2.5 arc gap, ndistance between the arc electrodes, cmin.3.2.6 arc rating, nvalue attributed to materials that de-scribes their performance to exposure to an electric arcdischarge, J
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