1、Designation:E145314Standard Guide forStorage of Magnetic Tape Media that Contains Analog orDigital Radioscopic Data1This standard is issued under the fixed designation E1453;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、 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 guide may be used for the control and maintenanceof recorded and unrecorded magnetic and optical media ofanalog or di
3、gital electronic data from industrial radioscopy.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to
4、 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 the applica-bility of regulatory limitations prior to use.For specificprecautionary statements,see Section 6.2.Re
5、ferenced Documents2.1 ASTM Standards:2E1000 Guide for RadioscopyE1255 Practice for Radioscopy2.2 ANSI Standards:3INCITS 40 Unrecorded Magnetic TapeINCITS 39 Recorded Magnetic TapeINCITS 125 Two-Sided,Double Density DiskINCITS 46 Six-Disk PackINCITS 48 Magnetic Tape Cassettes2.3 NIST Standard:NBS Han
6、dbook,NBS SP 500.10143.Significance and Use3.1 The provisions of this guide are intended to control andmaintain the quality of recorded industrial electronic data fromradioscopy and unrecorded magnetic and optical media only,and are not intended to control the acceptability of thematerials or produc
7、ts examined.It is further intended that thisguide be used as an adjunct to Guide E1000 and PracticeE1255.3.2 The necessity for applying specific control proceduressuch as those described in this guide is dependent to a certainextent,on the degree to which the user adheres to goodrecording and storag
8、e practices as a matter of routine proce-dure.4.Unrecorded Media Storage4.1 Un-Opened Containers:4.1.1 Storage RecommendationsAny media in containerssealed by the manufacturer and not opened should be stored asshipped,whenever possible,to avoid container damage andpossible media damage.Storage tempe
9、rature should be 60 620F(16 6 11C),relative humidity range of 45 6 15%,at apressure range of 12.5 6 2.5 psi and a maximum magnetic fieldstrength of 50 Oe.The optimum storage conditions are 65F(18C)at 40%relative humidity,14.7 psi and a maximummagnetic field strength of 30 Oe.Damaging stresses in the
10、media can be produced by large temperature and humidityvariations even if they remain within the specified ranges.Specific media manufacturers recommendations should beconsulted when large variations in temperature or humidity,orboth,are anticipated or experienced.4.1.2 Higher or Lower Storage Condi
11、tionsWhen tempera-ture exceeds 90F(32C)or humidity exceeds 90%,orpressure exceeds 15 psi,some unrecorded media should beused under normal existing conditions to test for degradation.If degradation is found on these samples,subsequent samplingmay be done on other media to avoid unnecessary scrap.Ifst
12、orage temperature falls below 30F(1C),media stored atthese lower temperatures in unopened containers should beallowed to stabilize at a room temperature(60 to 90F(16 to32C)before opening the containers.The stabilization timewill vary with the bulk of the stored media and the storagetemperature.The l
13、ower the temperature and greater the bulk,1This guide is under the jurisdiction of ASTM Committee E07 on Nondestruc-tive Testing and is the direct responsibility of Subcommittee E07.01 on Radiology(X and Gamma)Method.Current edition approved Oct.1,2014.Published October 2014.Originallyapproved in 19
14、92.Last previous edition approved in 2009 as E1453-09.DOI:10.1520/E1453-14.2For 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
15、 website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.Copyright ASTM International,10
16、0 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 the longer the time required to reach room temperature.Ifcontainers are opened too soon,condensation could cause themedia to stick to whatever is touching their surfaces.If therelative humidity falls below 10%and the moisture in themedia is reduced sufficiently,damage can occur during han-dling after opening the sealed containers,and the media may besubjected to static electrical discharges.Storage humiditiesover 60%c
