1. Trang chủ
  2. » Kỹ Thuật - Công Nghệ

Bsi bs en 12495 2000

36 0 0

Đang tải... (xem toàn văn)

Tài liệu hạn chế xem trước, để xem đầy đủ mời bạn chọn Tải xuống

THÔNG TIN TÀI LIỆU

Thông tin cơ bản

Định dạng
Số trang 36
Dung lượng 349,5 KB

Nội dung

www bzfxw com | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |[.]

BRITISH STANDARD Cathodic protection for fixed steel offshore structures The European Standard EN 12495:2000 has the status of a British Standard ICS 47.020.01; 77.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BS EN 12495:2000 BS EN 12495:2000 National foreword This British Standard is the official English language version of EN 12495:2000 Reference should also be made to BS 7361, Code of practice for land and marine applications, which will eventually be withdrawn when all the CEN standards relating to cathodic protection currently being prepared, are published The UK participation in its preparation was entrusted to Technical Committee GEL/603, Cathodic protection, which has the responsibility to: Ð aid enquirers to understand the text; Ð present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; Ð monitor related international and European developments and promulgate them in the UK A list of organizations represented on this committee can be obtained on request to its secretary Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ªInternational Standards Correspondence Indexº, or by using the ªFindº facility of the BSI Standards Electronic Catalogue A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages to 32, an inside back cover and a back cover The BSI copyright notice displayed in this document indicates when the document was last issued This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 2000  BSI 05-2000 ISBN 580 34821 Amendments issued since publication Amd No Date Comments (1 (8523($167$1'$5' 1250((8523e(11( (8523b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e (8523e(1 '( 1250$/,6$7,21 (8523b,6&+(6 20,7(( )h5 125081* &HQWUDO6HFUHWDULDWUXHGH6WDVVDUW%%UXVVHOV ‹&(1 $OOULJKWVRIH[SORLWDWLRQLQDQ\IRUPDQGE\DQ\PHDQVUHVHUYHG ZRUOGZLGHIRU&(1QDWLRQDO0HPEHUV 5HI1R(1( 3DJH (1 &RQWHQWV 3DJH )RUHZRUG ,QWURGXFWLRQ  6FRSH  6WUXFWXUDOSDUWV  0DWHULDOV  (QYLURQPHQW  1RUPDWLYHUHIHUHQFHV  7HUPVDQGGHILQLWLRQV  'HVLJQEDVLV  2EMHFWLYHV  &DWKRGLFSURWHFWLRQFULWHULD  (OHFWULFDOFXUUHQWGHPDQG  &RDWLQJV 10  &DWKRGLFSURWHFWLRQV\VWHPV$QRGHGLPHQVLRQV 11  'HVLJQRIJDOYDQLFDQRGHVV\VWHP 11  *HQHUDO 11  'HVLJQFRQVLGHUDWLRQV 12  *DOYDQLFDQRGHPDWHULDOV 12  /RFDWLRQRIDQRGHV 13  $QRGHV LQVHUWVDQGDWWDFKPHQWVGHVLJQ 14  'HVLJQRILPSUHVVHGFXUUHQWV\VWHP 15  *HQHUDO 15  'HVLJQFRQVLGHUDWLRQV 15  (TXLSPHQWFRQVLGHUDWLRQV 16  /RFDWLRQFRQVLGHUDWLRQV 17  'HVLJQRIPRQLWRULQJV\VWHPV 17  2EMHFWLYHV 18  'HVFULSWLRQ 18 ‹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www.bzfxw.com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í í DQDHURELFHQYLURQPHQW í í  35(1˜ í QROLPLW  35(1 í VHHQRWH QROLPLW 'XSOH[ í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‹%6, 3DJH10 (1  ZHOOV WR EH GULOOHG D FXUUHQW DOORZDQFH SHU ZHOO VKDOO EH FRQVLGHUHG GHSHQGLQJ RQ SURMHFWHG VL]HV GHSWKDQGFHPHQWLQJRIWKHZHOOV VHH$LQDQQH[$   QHLJKERXULQJVWUXFWXUHVDQGSLSHOLQHVLQHOHFWULFDOFRQWDFWZLWKWKHIL[HGVWHHORIIVKRUHVWUXFWXUHWREH SURWHFWHG 7KHVHOHFWLRQRIGHVLJQFXUUHQWGHQVLWLHVPD\EHEDVHGRQH[SHULHQFHVIURPVLPLODUVWUXFWXUHVLQWKHVDPH HQYLURQPHQWRUIURPVSHFLILFWHVWVDQGPHDVXUHPHQWV W\SLFDOYDOXHVDUHJLYHQLQDQQH[$  7KH HOHFWULFDO FXUUHQW GHQVLW\ UHTXLUHG IRU FDWKRGLF SURWHFWLRQ GHSHQGV XSRQ WKH NLQHWLFV RI WKH HOHFWURFKHPLFDO UHDFWLRQV DQG YDULHV ZLWK SDUDPHWHUV VXFK DV WKH HOHFWURGH SRWHQWLDO RI WKH VWHHO WKH GLVVROYHGR[\JHQFRQWHQWRIWKHVHDZDWHUWKHZDWHUIORZUDWHWKHWHPSHUDWXUHDQGSRVVLEO\WKHZDWHU GHSWK )XUWKHUPRUH WKH EXLOG XS RI FDOFDUHRXV GHSRVLWV DQG WKH VHWWOHPHQW RI PDULQH JURZWK PRGLI\ WKH VXUIDFHFRQGLWLRQVIRUWKHFDWKRGLFUHDFWLRQV )RU HDFK SDUWLFXODU VHW RI HQYLURQPHQWDO FRQGLWLRQV DQG VXUIDFH FRQGLWLRQV RI WKH VWHHO VXFK DV UXVWHG EODVW FOHDQHG FRDWHG ZLWK RUJDQLF RU PHWDOOLF FRDWLQJ  WKH IROORZLQJ HOHFWULFDO FXUUHQW GHQVLWLHV VKDOO EH HYDOXDWHG  LQLWLDO HOHFWULFDO FXUUHQW GHQVLW\ UHTXLUHG WR DFKLHYH WKH LQLWLDO SRODUL]DWLRQ RI WKH VWUXFWXUH LH WR DFKLHYHWKHORZHULQJRIWKHVWHHOSRWHQWLDOGRZQWRDYDOXHZLWKLQWKHUDQJHUHFRPPHQGHGLQ7DEOH  PDLQWHQDQFHHOHFWULFDOFXUUHQWGHQVLW\UHTXLUHGWRPDLQWDLQWKLVSRODUL]DWLRQOHYHORQWKHVWUXFWXUH  ILQDO RU UHSRODUL]DWLRQ HOHFWULFDO FXUUHQW GHQVLW\ UHTXLUHG IRU D SRVVLEOH UHSRODUL]DWLRQ LH IRU UHHVWDEOLVKLQJ WKH SRWHQWLDO WR WKH LQLWLDO SRODUL]DWLRQ OHYHO  RI WKH VWUXFWXUH DIWHU VHYHUH VWRUPV RU FOHDQLQJRSHUDWLRQV $V WKH LQLWLDO SRODUL]DWLRQ SHULRG SUHFHGLQJ VWHDG\ VWDWH RU PDLQWHQDQFH FRQGLWLRQV LV QRUPDOO\ VKRUW FRPSDUHG WR WKH GHVLJQ OLIH WKH WLPH ZHLJKWHG HOHFWULFDO FXUUHQW GHQVLW\ EHFRPHV YHU\ FORVH WR PDLQWHQDQFHHOHFWULFDOFXUUHQWGHQVLW\ $SURSHUHYDOXDWLRQRIWKHFXUUHQWGHQVLWLHVUHTXLUHGVKDOOEHFDUULHGRXWWRRSWLPL]HWKHFDWKRGLFSURWHFWLRQ V\VWHP ,QWHUDFWLRQV $ SODWIRUP PD\ EH SHUPDQHQWO\ RU WHPSRUDULO\ FRQQHFWHG WR RWKHU QHLJKERXULQJ VWUXFWXUHV 7KHVH VWUXFWXUHV VKRXOG EH ILWWHG ZLWK WKHLU RZQ FDWKRGLF SURWHFWLRQ V\VWHP ZKLFK VKDOO EH FKHFNHG EHIRUH HOHFWULFDOO\FRQQHFWLQJWKHPWRWKHSODWIRUPFRQVLGHUHG ,IWHPSRUDU\VWUXFWXUHVDUHQRWILWWHGZLWKDFDWKRGLFSURWHFWLRQV\VWHPRULIWKLVLVLQHIIHFWLYHWKHFDWKRGLF SURWHFWLRQRIWKHSODWIRUPVKRXOGEHFKHFNHGWRHQVXUHLWVHIILFLHQF\GXULQJWKHFRQQHFWLRQSHULRGDQGWKH LQIOXHQFHRIWKLVIRUHLJQVWUXFWXUHVKRXOGEHHYDOXDWHG  &RDWLQJV 7KHFDWKRGLFSURWHFWLRQV\VWHPPD\EHFRPELQHGZLWKVXLWDEOHFRDWLQJV\VWHPV7KHFRDWLQJUHGXFHVWKH HOHFWULFDO FXUUHQW GHPDQG DQG LPSURYHV WKH HOHFWULFDO FXUUHQW GLVWULEXWLRQ RQ WKH VWUXFWXUH GXH WR LWV LQVXODWLQJSURSHUWLHV 7KLVUHGXFWLRQRIWKHHOHFWULFDOFXUUHQWGHPDQGPD\EHLQDUDWLRRIWRRUHYHQPRUH+RZHYHUWKH FXUUHQWGHPDQGRIFRDWHGVWHHOZLOOLQFUHDVHZLWKWLPHDVWKHFRDWLQJGHWHULRUDWHV $QLQLWLDOFRDWLQJEUHDNGRZQIDFWRUUHODWHGPDLQO\WRPHFKDQLFDOGDPDJHRFFXUULQJGXULQJWKHLQVWDOODWLRQRI WKHVWUXFWXUHVKRXOGEHFRQVLGHUHGDQGDFRDWLQJGHWHULRUDWLRQUDWHVKDOOEHWKHUHDIWHUHYDOXDWHGLQRUGHUWR WDNH LQWR DFFRXQW WKH FRDWLQJ DJHLQJ DQG SRVVLEOH VPDOO PHFKDQLFDO GDPDJH RFFXUULQJ WR WKH FRDWLQJ GXULQJWKHVWUXFWXUHOLIH 7KHVHYDOXHVDUHFORVHO\GHSHQGHQWRQWKHDFWXDOLQVWDOODWLRQFRQGLWLRQVDQGRSHUDWLRQFRQGLWLRQV *XLGHOLQHVIRUWKHYDOXHVRIFRDWLQJEUHDNGRZQIDFWRUVDUHJLYHQLQDQQH[$ 7KHUHVXOWDQWHOHFWULFDOFXUUHQWGHQVLW\QHHGHGIRUWKHSURWHFWLRQRIFRDWHGVWHHOLVWKHUHIRUHHTXDOWRWKH SURGXFWRIWKHHOHFWULFDOFXUUHQWGHQVLW\IRUEDUHVWHHODQGWKHFRDWLQJEUHDNGRZQIDFWRU ‹%6, 3DJH (1 'XH WR SRVVLEOH LQWHUDFWLRQV EHWZHHQ WKH FDWKRGLF SURWHFWLRQ DQG WKH FRDWLQJ DOO FRDWLQJV WR EH XVHG LQ FRPELQDWLRQ ZLWK FDWKRGLF SURWHFWLRQ VKRXOG EH WHVWHG EHIRUHKDQG WR HVWDEOLVK WKDW WKH\ KDYH DGHTXDWH UHVLVWDQFHWRFDWKRGLFGLVERQGPHQW  &DWKRGLFSURWHFWLRQV\VWHPVDQRGHGLPHQVLRQV &DWKRGLFSURWHFWLRQFDQEHDFKLHYHGXVLQJ  WKHJDOYDQLFDQRGHVV\VWHP  WKHLPSUHVVHGFXUUHQWV\VWHP  DFRPELQDWLRQRIERWKFDWKRGLFSURWHFWLRQV\VWHPV K\EULGV\VWHPV  :KHQXVLQJK\EULGV\VWHPVWKHJDOYDQLFDQRGHVVKRXOGSURYLGHFDWKRGLFSURWHFWLRQGXULQJIORDWRXWLQLWLDO LQVWDOODWLRQDQGVXEVHTXHQWO\GXULQJWKHLPSUHVVHGFXUUHQWV\VWHPVKXWGRZQV *DOYDQLF DQRGHV VKRXOG DOVR EH LQVWDOOHG LQ DUHDV ZKHUH LW PD\ EH GLIILFXOW WR DFKLHYH DGHTXDWH OHYHO RI SRODUL]DWLRQE\WKHLPSUHVVHGFXUUHQWV\VWHPGXHWRVKLHOGLQJHIIHFWV $VWKHHOHFWULFDOFXUUHQWGHPDQGLVQRWFRQVWDQWZLWKWLPHWKHFDWKRGLFSURWHFWLRQV\VWHPVKDOOEHDEOHWR GHOLYHUWKHUHSRODUL]DWLRQFXUUHQWGHQVLW\UHTXLUHGIRUVKRUWSHULRGVWKURXJKRXWWKHOLIHRIWKHVWUXFWXUH 7KHQXPEHURIDQRGHVUHTXLUHGLQDQ\SDUWLFXODU]RQHRIWKHVWUXFWXUHZLOOEHGHWHUPLQHGE\WKHFDWKRGLF SURWHFWLRQ FXUUHQW GHPDQG LQ WKDW ]RQH DQG WKH LQGLYLGXDO DQRGH FXUUHQW RXWSXW 7KH FXUUHQW RXWSXW IURP HDFKLQGLYLGXDODQRGHLVFDOFXODWHGE\2KP¶VODZ , D95 ZKHUH D9 LVWKHGULYLQJYROWDJHEHWZHHQWKHDQRGHSRWHQWLDODQGWKHSURWHFWLRQSRWHQWLDORIVWHHOLQYROWV LVWKHFLUFXLWUHVLVWDQFHXVXDOO\WDNHQDVWKHDQRGHUHVLVWDQFHLQRKPV 7KHDQRGHUHVLVWDQFHLVDIXQFWLRQRIWKHUHVLVWLYLW\RIWKHDQRGLFHQYLURQPHQWDQGRIWKHJHRPHWU\ IRUP DQG GLPHQVLRQV

Ngày đăng: 14/04/2023, 00:40

TÀI LIỆU CÙNG NGƯỜI DÙNG

  • Đang cập nhật ...

TÀI LIỆU LIÊN QUAN