1、Designation: E 1453 93 (Reapproved 2002)e1Standard Guide forStorage of Media that Contains Analog or DigitalRadioscopic Data1This standard is issued under the fixed designation E 1453; 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 (e) indicates an editorial change since the last revision or reapproval.e1NOTEMade editorial corrections to ANSI standards in Referenced Documents and 6.4 in December 2002.1. Scope1.1 Thi
3、s guide may be used for the control and maintenanceof recorded and unrecorded magnetic and optical media ofanalog or digital electronic data from industrial radioscopy.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of
4、 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. Referenced Documents2.1 ASTM Standards:E 1000 Guide for Radioscopy2E 1255 Practice for Radi
5、oscopy22.2 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 Handbook, NBS SP 500.10143. Significance and Use3.1 The provisions of this guide are int
6、ended 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 products examined. It is further intended that thisguide be used as an adjunct to Guide E
7、 1000 and PracticeE 1255.3.2 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 storage practices as a matter of routine proce-dure.4. Unrecorded Media Storage4.1 Un
8、-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 temperature should be 60 620F (16 6 11C), relative humidity range of 45 6 15 %,
9、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 themedia can be produced by large temperature and humidityvariations
10、 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 ConditionsWhen tem-perature exceeds 90F (32C) or humidity exceeds 90
11、 %, 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. Ifstorage temperature falls below 30F (1C), media stored att
12、hese 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 lower the temperature and greater the bulk,the lon
13、ger 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 the1This guide is under the jurisdiction of ASTM Committee E07 on Nondestruc-tive Testing and is the direct responsibility of Subco
14、mmittee E07.11 on DigitalImaging and Communication in Nondestructive Evaluation (DICONDE).Current edition approved December 10, 2002. Published February 2003. Origi-nally approved in 1992. Last previous edition approved in 1996 as E 1453 -93(1996).2Annual Book of ASTM Standards, Vol 03.03.3Available
15、 from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.4Available from National Institute of Standards and Technology (NIST),Gaithersburg, MD 20899.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United St
16、ates.relative 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 % can also cause the media to stick to whateve
17、r istouching their surfaces.4.2 Opened ContainersThe same considerations de-scribed in 4.1 for un-opened containers apply. Opened contain-ers are those on which the manufacturers inner bag around themedia has been opened. This can cause the unrecorded mediato stick/degrade more rapidly when exposed
18、to high humidityand temperature.5. Recorded Media Storage5.1 Recorded media are normally stored in some form ofenclosures to exclude dust/dirt and protect them against physi-cal deterioration and damage. Storage conditions can bedesigned for archival preservation, normally considered to befor at lea
19、st 20 years or for moderate time periods by using theguidelines in 4.1; however, the recorded media must have beensufficiently recorded in accordance with manufacturers rec-ommendations and stored in suitable enclosures to ensurepreservation. The storage enclosure should limit dust particlesto 50 m
20、maximum.5.1.1 Enclosure Materials for Recorded Media:5.1.1.1 GeneralThe enclosure material shall be free ofacids and corrosives, and be chemically stable.5.1.1.2 Activity Test for Enclosure MaterialsAt least threerepresentative samples of recorded media to be stored togetherwith the proposed enclosu
21、res shall be placed in close contactwith each other and subjected to an accelerated aging test of 856 5F (30 6 3C), 70 6 10 % relative humidity for 30 days.No materials should be transferred from the enclosure materialto the media and the recorded data should not be affected.5.2 Storage Area Conditi
22、ons:5.2.1 Air ImpuritiesInert or inactive solid particles can bedeposited on recorded media and interfere with readability andproduce degradation. Reactive types of solids may causedegradation of the media and gaseous impurities may causedata deterioration. Never smoke, wax the floors, use steel woo
23、lpads on a buffer machine, eat or drink in the media storagearea. Solvents should 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 thedew point of
24、 the air may produce condensed moisture on therecorded data and cause sticking. In general, a moderatetemperature range, as described in 4.1, along with the minimi-zation of large variations, is recommended.5.2.3 HumidityThe extremes must be avoided as pro-longed exposures to relative humidities ove
25、r 60 % will tend todamage the media and may cause fungus growth and sticking.Under conditions of low or changing humidity, defects in themedia may occur. Low humidities will also increase thepotential of static charges on the recorded media attractingsolids that could harm them. In general, a relati
26、ve humidityrange of 30 to 60 % is recommended.5.3 Fire ResistanceRecorded media can withstand tem-peratures as high as 120F (49C) without significant loss ofdata quality, however, they may become distorted or stick toeach other or to the enclosure material.6. Special Precautions6.1 Damaging stresses
27、 in a tape pack can be produced bylarge temperature and humidity variations even if they remainwithin the specified ranges. Excessive temperature and humid-ity conditions can also cause tape layer-to-layer adhesion(blocking) even if they are maintained constant. Extremely dryenvironment can cause la
28、yer-to-layer adhesion due to staticbuild-up. Torn windings in the middle of a pack is a sure signthat the tape has been subjected to an extreme environment.The coatings on some storage media which have been sub-jected to very high humidities can breakdown and becomegummy due to hydrolysis. This medi
29、a coating deterioration canusually be reversed by storing the media in a cool and dryenvironment for an extended period of time.6.2 Stray magnetic fields, which are of sufficient intensity toobliterate data on magnetic media, at a distance greater than 3in. (76 mm) from the source are rarely, if eve
30、r, encountered innormal environments.6.3 Some media contain integral sensors that indicate tem-perature excursions exceeding manufacturers specifications.These indicators should be inspected before media use, thenperiodically during storage.6.4 Further guidance for the storage and care of specificpr
31、oducts may be found in ANSI standards, INCITS 40, IN-CITS 39, INCITS 125, INCITS 46, INCITS 48 and the NISTstandard, NBS SP 500.101.7. Precision and Bias7.1 No statement is made about the precision or bias of thisguide for measuring the amount of degradation of the media,since the results of the tes
32、ting merely show whether the mediaare of sufficient quality to record and preserve radioscopic data.8. Keywords8.1 analog; data; digital; electronic; media; radioscopic;storageE 1453 93 (2002)e12ASTM International takes no position respecting the validity of any patent rights asserted in connection
33、with 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 te
34、chnical 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 consider
35、ation 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
36、Harbor 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).E 1453 93 (2002)e13
