【BS英國標(biāo)準(zhǔn)】BS EN 46251996 無損檢驗(yàn)—射線圖像質(zhì)量 第5部分 圖像質(zhì)量顯示計(jì)(雙線型)—圖像不清晰度的測(cè)定

《【BS英國標(biāo)準(zhǔn)】BS EN 46251996 無損檢驗(yàn)—射線圖像質(zhì)量 第5部分 圖像質(zhì)量顯示計(jì)(雙線型)—圖像不清晰度的測(cè)定》由會(huì)員分享，可在線閱讀，更多相關(guān)《【BS英國標(biāo)準(zhǔn)】BS EN 46251996 無損檢驗(yàn)—射線圖像質(zhì)量 第5部分 圖像質(zhì)量顯示計(jì)(雙線型)—圖像不清晰度的測(cè)定（12頁珍藏版）》請(qǐng)?jiān)谘b配圖網(wǎng)上搜索。

1、 國內(nèi)外標(biāo)準(zhǔn) 大全 豆丁網(wǎng)國內(nèi)外標(biāo)準(zhǔn)下載地址 BRITISH STANDARD Non-destructive testing D Image quality of radiographs Part 5. Image quality indicators (duplex wire type), determination of image unsharpness value

2、 The European Standard EN 462-5 : 1996 has the status of a British Standard ICS 19.100 | BS EN 462-5 : 1996 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

3、 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COP

4、YRIGHT LAW BS EN 462-5 : 1996 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee WEE/46, Non-destructive testing, upon which the following bodies were represented: Aluminium Federation Association o

5、f Consulting Engineers BNF (Fulmer Materials Centre) British Airways British Chemical Engineering Contractors' Association British Coal Corporation British Gas plc British Institute of Non-destructive Testing British Iron and Steel Producers' Association British Nuclear Fuels plc British Rai

6、lways Board Castings Technology International Electricity Association Engineering Equipment and Materials Users' Association Health and Safety Executive Institute of Physics Institute of Quality Assurance Lloyd's Register of Shipping Ministry of Defence National Radiological Protection Bo

7、ard Power Generation Contractors' Association (PGCA (BEAMA Ltd.)) Railway Industry Association of Great Britain Royal Society of Chemistry Safety Assessment Federation Ltd. Society of British Aerospace Companies Limited Society of Motor Manufacturers and Traders Limited United Kingdom Accredit

8、ation Service Welding Institute This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1996 BSI 1996 The following BSI references rela

9、te to the work on this standard: Committee reference WEE/46 Draft for comment 94/703765 DC ISBN 0 580 26259 6 The following body was also represented in the drafting of the standard, through subcommittees and panels: British Photographic Association Amd. No. Date Text affect

10、ed Amendments issued since publication BS EN 462-5 : 1996 Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 462-5 3

11、 BSI 1996 i BS EN 462-5 : 1996 Foreword This British Standard has been prepared by Technical Committee WEE/46 and is the English language version of EN 462-5 : 1996 Non-destructive testing D Image quality of radiographs D Part 5 : I

12、mage quality indicators (duplex wire type), determination of image unsharpness value published by the European Committee for Standardization (CEN). EN 462-5 : 1996 was produced as a result of international discussions in which the United Kingdom took an active part. BS EN 462-5 : 1996, toge

13、ther with BS EN 462-1 : 1994, BS EN 462-2 : 1994, BS EN 462-4 : 1995 and BS EN 462-3 (in preparation) supersedes BS 3971 : 1980, which will be withdrawn when all the relevant Parts of BS EN 462 have been published. Cross references Publication referred to Corresponding British Standard EN

14、444 : 1994 BS EN 444 : 1994 Non-destructive testing D General principles for radiographic examination of metallic materials by X- and gamma rays BS EN 462 Non-destructive testing D Image quality of radiographs EN 462-1 : 1994 BS EN 462-1 : 1994 Image quality indicators (wire type) D Determination

15、 of image quality value EN 462-2 : 1994 BS EN 462-2 : 1994 Image quality indicators (step/hole type) D Determination of image quality value Compliance with a British Standard does not of itself confer immunity from legal obligations. ii BSI 1996 EUROPEAN STANDARD EN 462-5 NORME EU

16、ROPE? ENNE EUROPAè ISCHE NORM March 1996 ICS 19.100 Descriptors: Non-destructive tests, industrial radiography, photographic images, quality, image quality indicators, specifications, dimensions, utilization English version Non-destructive testing D Image q

17、uality of radiographs D Part 5: Image quality indicators (duplex wire type), determination of image unsharpness value Essais non destructifs D Qualite? d'image des radiogrammes D Partie 5: Indicateurs de qualite? d'image (duplex aá fils), de? termination de l'indice de flou

18、de l'image Zerstoè rungsfreie Pruè fung D Bildguè te von Durchstrahlungsaufnahmen D Teil 5: Bildguè tepruè fkoè rper (Doppel-Drahtsteg), Ermittlung der Bildunschaè rfe This European Standard was approved by CEN on 1996-02-23. CEN members are bound to comply with the CEN/CENELEC In

19、ternal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat

20、 or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as

21、the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee f

22、or Standardization Comite? Europe? en de Normalisation Europaè isches Komitee fuè r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members  Ref. No. EN 462-5 : 1996 E Page EN 462-5: 1996 BSI 1996 Forew

23、ord This European Standard has been prepared by Technical Committee CEN/TC 138, Non-destructive Contents  Page testing, the secretariat of which is held by AFNOR. EN 462-5 is a Part of a series of European Standards; the other Parts are the following: EN 462-1 Non-destructive

24、 testing D Image quality of radiographs D Part 1: Image quality indicators (wire type), determination of image quality value EN 462-2 Non-destructive testing D Image quality of radiographs D Part 2: Image quality indicators (step/hole type), determination of image quality value EN 462-3 Non

25、-destructive testing D Image quality of radiographs D Part 3: Image quality classes for ferrous metals EN 462-4 Non-destructive testing D Image quality of radiographs D Part 4: Experimental evaluation of image quality values and image quality tables This European Standard shall be given

26、the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 1996, and conflicting standards shall be withdrawn at the latest by September 1996. According to the CEN/CENELEC Internal Regulations, the national standards organizati

27、ons of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword 2 1 Scope 3 2 Nor

28、mative references 3 3 Definitions 3 4 Specification of duplex wire IQI 3 5 Use of duplex wire 4 Page 3 EN 462-5: 1996 1 Scope This standard specifies a method of determining the image unsharpness of radiographs and real-time radioscopic systems. 2 Normative

29、references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of

30、 any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 444 Non-destructive testing D General principles for the radiographic examination of metallic

31、 materials with X- and gamma-rays EN 462-1 Non-destructive testing D Image quality of radiographs D Part 1: Image quality indicators (wire type), determination of image quality value EN 462-2 Non-destructive testing D Image quality of radiographs D Part 2: Image quality indicators (step/ho

32、le type), determination of image quality value 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 duplex wire image quality indicator (duplex wire IQI) An arrangement of pairs of wires as shown in figure 1. 3.2 image unsharpness value The number of

33、 the largest discernible element (see clause 5). The corresponding unsharpnesses are shown in table 1. 4 Specification of duplex wire IQI 4.1 Dimension/manufacture/marking 4.1.1 Design/material The duplex wire IQI shall consist of a series of 13 elements placed in a transparent r

34、igid plastic holder, each element shall consist of a pair of wires of circular section. The elements 1D to 3D are of tungsten, the others of platinum. The dimensions shall be in accordance with figure 1. Dimensions in millimetres Enlarged

35、 view of each wire pair (element) Figure 1. Duplex wire IQI Page EN 462-5: 1996 BSI 1996 4.1.2 Manufacture Table 1. Element number, corresponding image unsharpness and wire diameter Dimensions in millimetres Element no. (D = duplex) Corresponding unsharpness

36、Wire diameter and spacing, d Tolerances of wire diameter and wire spacing 13D 12D 11D 10D 9D 8D 7D 6D 5D 4D 3D 2D 1D 0,10 0,13 0,16 0,20 0,26 0,32 0,40 0,50 0,64 0,80 1,00 1,26 1,60 0,050 0,063 0,080 0,100 0,130 0,160 0,200 0,250 0,320 0,400 0,500 0,630 0,8

37、00 0,005 0,01 0,02 The wire diameters and spacing of the wires are shown in table 1. 4.1.3 Marking The marking of the duplex wire IQI (see figure1) shall give the following information: EN 462-5. 4.2 Declaration of conformity The manufacturer of this IQI shall pr

38、ovide a certificate of conformity with each duplex wire IQI. 5 Use of duplex wire The duplex wire IQI should be used in conjunction with a wire of step/hole type IQI. It shall be placed on the source side of the object being examined and be aligned as closely as possible normal to the

39、axis of the radiation beam. The image of the duplex wire IQI shall be examined with the aid of a magnifying glass up to 3 4. The largest element (i.e. pair of wires), the image of which has just merged from that of two separate wires into the single form without an identifiable space between t

40、he image of the two wires, is taken as the limit of discernibility. The image unsharpness U is given by 2d where d is the width of the wire and the wire spacing distance (see figure 1 and table 1). NOTE. The duplex wire IQI is no alternative for the wire of step/hole type IQI because it relates

41、only to unsharpness. BS EN 462-5 : 1996 List of references (see national foreword) BSI 389 Chiswick High Road London W4 4AL | | | | |

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