1、Designation: E1453 09E1453 14Standard 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
2、 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 guide may be used for the control and maintenance of recorded and unrecorded magnetic and optical m
3、edia of analogor digital electronic data from industrial radioscopy.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.3 This standa
4、rd does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use. For specific precautionary stat
5、ements, see Section 6.2. Referenced 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 Casset
6、tes2.3 NIST Standard:NBS Handbook, NBS SP 500.10143. Significance and Use3.1 The provisions of this guide are intended to control and maintain the quality of recorded industrial electronic data fromradioscopy and unrecorded magnetic and optical media only, and are not intended to control the accepta
7、bility of the materials orproducts examined. It is further intended that this guide be used as an adjunct to Guide E1000 and Practice E1255.3.2 The necessity for applying specific control procedures such as those described in this guide is dependent to a certain extent,on the degree to which the use
8、r adheres to good recording and storage practices as a matter of routine procedure.4. Unrecorded Media Storage4.1 Un-Opened Containers:4.1.1 Storage RecommendationsAny media in containers sealed by the manufacturer and not opened should be stored asshipped, whenever possible, to avoid container dama
9、ge and possible media damage. Storage temperature should be 60 6 20F(16 6 11C), relative humidity range of 45 6 15 %, at a pressure range of 12.5 6 2.5 psi and a maximum magnetic field strength1 This guide is under the jurisdiction of ASTM Committee E07 on Nondestructive Testing and is the direct re
10、sponsibility of Subcommittee E07.01 on Radiology (X andGamma) Method.Current edition approved July 1, 2009Oct. 1, 2014. Published July 2009October 2014. Originally approved in 1992. Last previous edition approved in 20022009 asE1453 - 93E1453 - 09.(2002). DOI: 10.1520/E1453-09.10.1520/E1453-14.2 For
11、 referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from American National Standards Institute (ANSI), 25
12、W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.4 Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http:/www.nist.gov.This document is not an ASTM standard and is intended only to provide the user of an ASTM
13、standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by
14、 ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1of 50 Oe. The optimum storage conditions are 65F (18C) at 40 % relative humidity, 14.7 psi and a maximum magnetic fieldstrength of 30 Oe.
15、Damaging stresses in the media can be produced by large temperature and humidity variations even if theyremain within the specified ranges. Specific media manufacturers recommendations should be consulted when large variations intemperature or humidity, or both, are anticipated or experienced.4.1.2
16、Higher or Lower Storage ConditionsWhen temperature exceeds 90F (32C) or humidity exceeds 90 %, or pressureexceeds 15 psi, some unrecorded media should be used under normal existing conditions to test for degradation. If degradationis found on these samples, subsequent sampling may be done on other m
17、edia to avoid unnecessary scrap. If storage temperaturefalls below 30F (1C), media stored at these lower temperatures in unopened containers should be allowed to stabilize at a roomtemperature (60 to 90F (16 to 32C) before opening the containers. The stabilization time will vary with the bulk of the
18、 storedmedia and the storage temperature. The lower the temperature and greater the bulk, the longer the time required to reach roomtemperature. If containers are opened too soon, condensation could cause the media to stick to whatever is touching their surfaces.If the relative humidity falls below
19、10 % and the moisture in the media is reduced sufficiently, damage can occur during handlingafter opening the sealed containers, and the media may be subjected to static electrical discharges. Storage humidities over 60 %can also cause the media to stick to whatever is touching their surfaces.4.2 Op
20、ened ContainersThe same considerations described in 4.1 for un-opened containers apply. Opened containers are thoseon which the manufacturers inner bag around the media has been opened. This can cause the unrecorded media to stick/degrademore rapidly when exposed to high humidity and temperature.5.
21、Recorded Media Storage5.1 Recorded media are normally stored in some form of enclosures to exclude dust/dirt and protect them against physicaldeterioration and damage. Storage conditions can be designed for archival preservation, normally considered to be for at least 20years or for moderate time pe
22、riods by using the guidelines in 4.1; however, the recorded media must have been sufficientlyrecorded in accordance with manufacturers recommendations and stored in suitable enclosures to ensure preservation. The storageenclosure should limit dust particles to 50 m 0.002 in. (0.05 mm) maximum.5.1.1
23、Enclosure Materials for Recorded Media:5.1.1.1 GeneralThe enclosure material shall be free of acids and corrosives, and be chemically stable.5.1.1.2 Activity Test for Enclosure MaterialsAt least three representative samples of recorded media to be stored together withthe proposed enclosures shall be
24、 placed in close contact with each other and subjected to an accelerated aging test of 85 6 5F(30 6 3C), 70 6 10 % relative humidity for 30 days. No materials should be transferred from the enclosure material to the mediaand the recorded data should not be affected.5.2 Storage Area Conditions:5.2.1
25、Air ImpuritiesInert or inactive solid particles can be deposited on recorded media and interfere with readability andproduce degradation. Reactive types of solids may cause degradation of the media and gaseous impurities may cause datadeterioration. Never smoke, wax the floors, use steel wool pads o
26、n a buffer machine, eat or drink in the media storage area. Solventsshould not come into contact with the media, because they may soften the coatings and cause degradation.5.2.2 TemperatureContinuous temperatures above 120F (49C) may accelerate degradation and temperatures below the dewpoint of the
27、air may produce condensed moisture on the recorded data and cause sticking. In general, a moderate temperature range,as described in 4.1, along with the minimization of large variations, is recommended.5.2.3 HumidityThe extremes must be avoided as prolonged exposures to relative humidities over 60 %
28、 will tend to damagethe media and may cause fungus growth and sticking. Under conditions of low or changing humidity, defects in the media mayoccur. Low humidities will also increase the potential of static charges on the recorded media attracting solids that could harmthem. In general, a relative h
29、umidity range of 30 to 60 % is recommended.5.3 Fire ResistanceRecorded media can withstand temperatures as high as 120F (49C) without significant loss of dataquality, however, they may become distorted or stick to each other or to the enclosure material.6. Special Precautions6.1 Damaging stresses in
30、 a tape pack can be produced by large temperature and humidity variations even if they remain withinthe specified ranges. Excessive temperature and humidity conditions can also cause tape layer-to-layer adhesion (blocking) evenif they are maintained constant. Extremely dry environment can cause laye
31、r-to-layer adhesion due to static build-up. Torn windingsin the middle of a pack is a sure sign that the tape has been subjected to an extreme environment. The coatings on some storagemedia which have been subjected to very high humidities can breakdown and become gummy due to hydrolysis. This media
32、coating deterioration can usually be reversed by storing the media in a cool and dry environment for an extended period of time.6.2 Stray magnetic fields, which are of sufficient intensity to obliterate data on magnetic media, at a distance greater than 3 in.(76 mm) from the source are rarely, if ev
33、er, encountered in normal environments.6.3 Some media contain integral sensors that indicate temperature excursions exceeding manufacturers specifications. Theseindicators should be inspected before media use, then periodically during storage.E1453 1426.4 Further guidance for the storage and care of
34、 specific products may be found in ANSI standards, INCITS 40, INCITS 39,INCITS 125, INCITS 46, INCITS 48 and the NIST standard, NBS SP 500.101.7. Precision and Bias7.1 No statement is made about the precision or bias of this guide for measuring the amount of degradation of the media, sincethe result
35、s of the testing merely show whether the media are of sufficient quality to record and preserve radioscopic data.8. Keywords8.1 analog; data; digital; electronic; media; radioscopic; storageASTM International takes no position respecting the validity of any patent rights asserted in connection with
36、any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technic
37、al committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration
38、at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor
39、 Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 143
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