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

Bsi bs en 10246 12 2000

15 1 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

Tiêu đề Non-destructive Testing Of Steel Tubes
Tác giả Akin Koksal
Trường học British Standards Institution
Chuyên ngành Non-destructive Testing
Thể loại British Standard
Năm xuất bản 2000
Thành phố London
Định dạng
Số trang 15
Dung lượng 164,77 KB

Các công cụ chuyển đổi và chỉnh sửa cho tài liệu này

Nội dung

Li ce ns ed C op y A ki n K ok sa l, B ec ht el L td , 1 0 D ec em be r 20 02 , U nc on tr ol le d C op y, ( c) B S I | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |[.]

Trang 1

Licensed Copy: Akin Koksal, Bechtel Ltd, 10 December 2002, Uncontrolled Copy, (c) BSI

British Standard

A single copy of this British Standard is licensed to

Akin Koksal

10 December 2002

This is an uncontrolled copy Ensure use of the most current version of this document by searching British Standards Online at bsonline.techindex.co.uk

Trang 2

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

|

10246-12:2000

The European Standard EN 10246-12:2000 has the status of a

British Standard

ICS 23.040.10; 77.040.20

NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

Non-destructive testing

of steel tubes Ð

Part 12: Magnetic particle inspection of

seamless and welded ferromagnetic steel

tubes for the detection of surface

imperfections

Trang 3

This British Standard, having

been prepared under the

direction of the Engineering

Sector Committee, was published

under the authority of the

Standards Committee and comes

into effect on 15 June 2000

 BSI 06-2000

ISBN 0 580 34176 3

BS EN 10246-12:2000

Amendments issued since publication

Amd No Date Comments

National foreword

This British Standard is the official English language version of EN 10246-12:2000 The UK participation in its preparation was entrusted by Technical Committee ISE/73, Steels for pressure purposes, to Subcommittee ISE/73/1, Steel tubes for pressure purposes, 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 subcommittee 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 2 to 11 and a back cover

The BSI copyright notice displayed in this document indicates when the document was last issued

Trang 4

1250((8523e(11(

(8523b,6&+(1250

(1

)HEUXDU\

,&6

(QJOLVKYHUVLRQ

1RQGHVWUXFWLYHWHVWLQJRIVWHHOWXEHV±3DUW0DJQHWLF SDUWLFOHLQVSHFWLRQRIVHDPOHVVDQGZHOGHGIHUURPDJQHWLFVWHHO

WXEHVIRUWKHGHWHFWLRQRIVXUIDFHLPSHUIHFWLRQV

(VVDLVQRQGHVWUXFWLIVVXUGHVWXEHVHQDFLHU±3DUWLH

&RQWU{OHSDUPDJQpWRVFRSLHGHVWXEHVHQDFLHU IHUURPDJQpWLTXHVVDQVVRXGXUHHWVRXGpVSRXUODGpWHFWLRQ

GHVLPSHUIHFWLRQVGHVXUIDFH

=HUVW|UXQJVIUHLH3UIXQJYRQ6WDKOURKUHQ±7HLO 0DJQHWSXOYHUSUIXQJQDKWORVHUXQGJHVFKZHL‰WHU IHUURPDJQHWLVFKHU6WDKOURKUH]XP1DFKZHLVYRQ

2EHUIOlFKHQIHKOHUQ

7KLV(XURSHDQ6WDQGDUGZDVDSSURYHGE\&(1RQ'HFHPEHU

&(1PHPEHUVDUHERXQGWRFRPSO\ZLWKWKH&(1&(1(/(&,QWHUQDO5HJXODWLRQVZKLFKVWLSXODWHWKHFRQGLWLRQVIRUJLYLQJWKLV(XURSHDQ 6WDQGDUGWKHVWDWXVRIDQDWLRQDOVWDQGDUGZLWKRXWDQ\DOWHUDWLRQ8SWRGDWHOLVWVDQGELEOLRJUDSKLFDOUHIHUHQFHVFRQFHUQLQJVXFKQDWLRQDO VWDQGDUGVPD\EHREWDLQHGRQDSSOLFDWLRQWRWKH&HQWUDO6HFUHWDULDWRUWRDQ\&(1PHPEHU

7KLV(XURSHDQ6WDQGDUGH[LVWVLQWKUHHRIILFLDOYHUVLRQV (QJOLVK)UHQFK*HUPDQ $YHUVLRQLQDQ\RWKHUODQJXDJHPDGHE\WUDQVODWLRQ XQGHUWKHUHVSRQVLELOLW\RID&(1PHPEHULQWRLWVRZQODQJXDJHDQGQRWLILHGWRWKH&HQWUDO6HFUHWDULDWKDVWKHVDPHVWDWXVDVWKHRIILFLDO YHUVLRQV

&(1PHPEHUVDUHWKHQDWLRQDOVWDQGDUGVERGLHVRI$XVWULD%HOJLXP&]HFK5HSXEOLF'HQPDUN)LQODQG)UDQFH*HUPDQ\*UHHFH ,FHODQG,UHODQG,WDO\/X[HPERXUJ1HWKHUODQGV1RUZD\3RUWXJDO6SDLQ6ZHGHQ6ZLW]HUODQGDQG8QLWHG.LQJGRP

(8523($1 &200,77(( )25 67$1'$5',=$7,21

& 2 0 , 7 e  ( 8 5 2 3 e ( 1  ' (  1 2 5 0 $ / , 6 $ 7 , 2 1 ( 8 5 2 3 b, 6 &+ ( 6  2 0 , 7 ( (  ) h 5  12 5 0 8 1 *

&HQWUDO6HFUHWDULDWUXHGH6WDVVDUW%%UXVVHOV

‹&(1 $OOULJKWVRIH[SORLWDWLRQLQDQ\IRUPDQGE\DQ\PHDQVUHVHUYHG

Trang 5

(1

‹%6,

&217(176

3DJH )25(:25'

 6&23(

 1250$7,9(5()(5(1&(6

 *(1(5$/5(48,5(0(176

 0(7+2'2)7(67

 $&&(37$1&(/(9(/6

 (9$/8$7,212),1',&$7,216

 $&&(37$1&(

 7(675(3257,1*

$11(;$ LQIRUPDWLYH 7DEOH$3DUWVRI(11RQGHVWUXFWLYHWHVWLQJRIVWHHOWXEHV

Trang 6

3DJH (1

‹%6,

)25(:25'

7KLV(XURSHDQ6WDQGDUGKDVEHHQSUHSDUHGE\7HFKQLFDO&RPPLWWHH(&,667&6WHHO WXEHVDQGILWWLQJVIRUVWHHOWXEHVWKH6HFUHWDULDWRIZKLFKLVKHOGE\81,

7KLV(XURSHDQ6WDQGDUGVKDOOEHJLYHQWKHVWDWXVRIDQDWLRQDOVWDQGDUGHLWKHUE\SXEOLFDWLRQ RIDQLGHQWLFDOWH[WRUE\HQGRUVHPHQWDWWKHODWHVWE\$XJXVWDQGFRQIOLFWLQJQDWLRQDO VWDQGDUGVVKDOOEHZLWKGUDZQDWWKHODWHVWE\$XJXVW

$FFRUGLQJWRWKH&(1&(1(/(&,QWHUQDO5HJXODWLRQVWKHQDWLRQDOVWDQGDUGVRUJDQL]DWLRQVRI WKHIROORZLQJFRXQWULHVDUHERXQGWRLPSOHPHQWWKLV(XURSHDQ6WDQGDUG$XVWULD%HOJLXP

&]HFK5HSXEOLF'HQPDUN)LQODQG)UDQFH*HUPDQ\*UHHFH,FHODQG,UHODQG,WDO\

/X[HPERXUJ1HWKHUODQGV1RUZD\3RUWXJDO6SDLQ6ZHGHQ6ZLW]HUODQGDQGWKH8QLWHG LQJGRP

Trang 7

(1

‹%6,

 6&23(

7KLVSDUWRI(1VSHFLILHVWKHUHTXLUHPHQWVDQGWKHDFFHSWDQFHOHYHOVIRUPDJQHWLFSDUWLFOH LQVSHFWLRQ RI VHDPOHVV DQG ZHOGHG IHUURPDJQHWLF VWHHO WXEHV IRU WKH GHWHFWLRQ RI VXUIDFH LPSHUIHFWLRQV

7KLVSDUWRI(1LVWREHXVHGIRUWKHGHWHFWLRQRIVXUIDFHLPSHUIHFWLRQVRQWKHHQWLUHRUDQ\ SDUWRIWKHRXWHUVXUIDFHRIWXEHVH[FOXGLQJWKHHQGEHYHOIDFH

,QDGGLWLRQWKLVVWDQGDUGPD\EHXVHGDVDSSURSULDWHWRORFDWHWKHSRVLWLRQRIH[WHUQDOVXUIDFH LPSHUIHFWLRQV GHWHFWHG E\ DQRWKHU QRQGHVWUXFWLYH WHVWLQJ PHWKRG HJ XOWUDVRQLF SULRU WR GUHVVLQJRIWKHWXEHVXUIDFHDQGWRHQVXUHFRPSOHWHUHPRYDORIWKHLPSHUIHFWLRQDIWHUGUHVVLQJLV FRPSOHWH

(XURSHDQ 6WDQGDUG (1  1RQGHVWUXFWLYH WHVWLQJ RI VWHHO WXEHV FRPSULVHV WKH SDUWV VKRZQLQ$QQH[$

 1250$7,9(5()(5(1&(6

7KLV SDUW RI (1  LQFRUSRUDWHV E\ GDWHG RU XQGDWHG UHIHUHQFH SURYLVLRQV IURP RWKHU SXEOLFDWLRQV7KHVHQRUPDWLYHUHIHUHQFHVDUHFLWHGDWWKHDSSURSULDWHSODFHVLQWKHWH[WDQG WKH SXEOLFDWLRQV DUH OLVWHG KHUHDIWHU )RU GDWHG UHIHUHQFHV VXEVHTXHQW DPHQGPHQWV WR RU UHYLVLRQVRIDQ\RIWKRVHSXEOLFDWLRQVDSSO\WRWKLVSDUWRI(1RQO\ZKHQLQFRUSRUDWHGLQ LW E\ DPHQGPHQW RU UHYLVLRQ )RU XQGDWHG UHIHUHQFHV WKH ODWHVW HGLWLRQ RI WKH SXEOLFDWLRQ UHIHUUHGWRDSSOLHV

SULQFLSOH ,62)',6

'HWHFWLRQPHGLD ,62',6

(TXLSPHQW ,62',6

RQWXEHVDIWHUFRPSOHWLRQRIDOOWKHSULPDU\SURGXFWLRQSURFHVVRSHUDWLRQV

VDQGRUVFDOHRUDQ\RWKHUIRUHLJQPDWWHUWKDWZRXOGLQWHUIHUHZLWKWKHFRUUHFWLQWHUSUHWDWLRQRIWKH LQGLFDWLRQVREWDLQHGIURPPDJQHWLFSDUWLFOHLQVSHFWLRQ

127( 7KH W\SH RI LQGLFDWLRQV DV ZHOO DV WKH PLQLPXP GLPHQVLRQ RI WKH VXUIDFH

LPSHUIHFWLRQVWREHGHWHFWHGDUHGHSHQGHQWRQWKHVSHFLILFWXEHPDQXIDFWXULQJ SURFHVVDQGWKHVXUIDFHILQLVK



 ,QSUHSDUDWLRQXQWLOWKLVGRFXPHQWLVSXEOLVKHGDVD(XURSHDQ6WDQGDUGWKHFRUUHVSRQGLQJQDWLRQDO VWDQGDUG V VKRXOGEHDJUHHGDWWKHWLPHRIHQTXLU\DQGRUGHU

Trang 8

3DJH (1

‹%6,

FLUFXPIHUHQWLDOGLUHFWLRQIRUWKHGHWHFWLRQRIORQJLWXGLQDOVXUIDFHLPSHUIHFWLRQVRULQWKHGLUHFWLRQ SDUDOOHOWRWKHPDMRUD[LVRIWKHWXEHIRUWKHGHWHFWLRQRIWUDQVYHUVHVXUIDFHLPSHUIHFWLRQVZLWK VLPXOWDQHRXVDSSOLFDWLRQRIWKHSRZGHURUVXVSHQVLRQDVDSSURSULDWHWRUHYHDOWKHSUHVHQFHRI VXUIDFHLPSHUIHFWLRQVXVLQJDQLOOXPLQDWLRQRIQRWOHVVWKDQOX[

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

7KHXVHRIUHVLGXDOPDJQHWLVPLHDSSOLFDWLRQRIPDJQHWLFSDUWLFOHVDIWHULQLWLDOPDJQHWL]DWLRQLV RQO\SHUPLWWHGE\SULRUDJUHHPHQWEHWZHHQWKHSXUFKDVHUDQGWKHPDQXIDFWXUHU

7KHHQWLUHRXWHUVXUIDFHRIHDFKWXEHRUSRUWLRQRILWDVUHTXLUHGVKDOOEHLQVSHFWHGXVLQJWKH PDJQHWLFSDUWLFOHPHWKRGIRUWKHGHWHFWLRQRIORQJLWXGLQDODQGRUWUDQVYHUVHVXUIDFHLPSHUIHFWLRQV XVLQJ DF RU GF PDJQHWL]DWLRQ DQG SRZGHU RU VXVSHQVLRQ DV DSSURSULDWH WR WKH PDJQHWLF SDUWLFOH WHFKQLTXH DGRSWHG JHQHUDOO\ LQ DFFRUGDQFH ZLWK WKH UHTXLUHPHQWV JLYHQ LQ SU(1,62SU(1,62DQGSU(1,62

7KH PDJQHWLF SDUWLFOH LQVSHFWLRQ PHWKRG GRHV QRW PDNH LW SRVVLEOH WR GHWHUPLQH WKH QDWXUH VKDSH RULHQWDWLRQ DQG PRUH SDUWLFXODUO\ WKH GHSWK RI VXUIDFH LPSHUIHFWLRQV UHYHDOHG DV LQGLFDWLRQV7KHGLPHQVLRQVDQGH[WHQWRIPDJQHWLFSDUWLFOHµEXLOGXS¶RILQGLFDWLRQVGRQRWGLUHFWO\ UHSUHVHQWWKHDFWXDOGLPHQVLRQVRIWKHVXUIDFHLPSHUIHFWLRQFDXVLQJWKHLQGLFDWLRQ

D  OLQHDULQGLFDWLRQVLQZKLFKWKHOHQJWKLVHTXDOWRRUPRUHWKDQWKUHHWLPHVWKHZLGWK

E  URXQGHG LQGLFDWLRQV ZKLFK DUH FLUFXODU RU HOOLSWLFDO LQ VKDSH ZKHUH WKH OHQJWK RI WKH LQGLFDWLRQLVOHVVWKDQWKUHHWLPHVWKHZLGWK

F  DFFXPXODWHGLQGLFDWLRQVZKLFKDUHOLQHDURUQRQOLQHDUDQGDOLJQHGRUFOXVWHUHG

DUUDQJHGZLWKDGLVWDQFHEHWZHHQWKHPRIQRWPRUHWKDQWKHLURZQVL]HDQGFRQVLVWLQJ RIDWOHDVWWKUHHLQGLFDWLRQV

G  QRQUHOHYDQW LQGLFDWLRQV ZKLFK DUH VLPLODU WR LQGLFDWLRQV WKDW PD\ RFFXU IURP ORFDOL]HG VXUIDFH LUUHJXODULWLHV GXH WR PDFKLQLQJ PDUNV VFUDWFKHV VL]LQJVWUDLJKWHQLQJ PDUNV RU RWKHUVXUIDFHFRQGLWLRQV

Trang 9

(1

‹%6,

WXEHV

D  PHWKRG$FXUUHQWIORZPHWKRG,QWKLVPHWKRGFXUUHQWGHULYHGIURPDFGFIXOORUKDOI ZDYH UHFWLILHG DF H[WHUQDO SRZHU VRXUFH LV SDVVHG EHWZHHQ WZR FRQWDFW DUHDV RQ WKH VXUIDFH RI WKH WXEH7KLVPHWKRG LV LQWHQGHG IRU WKH GHWHFWLRQ RI LPSHUIHFWLRQV ZKLFK OLH JHQHUDOO\SDUDOOHOWRWKHGLUHFWLRQRIFXUUHQWIORZ

E  PHWKRG%WKUHDGHGEDUFDEOHPHWKRG,QWKLVPHWKRGFXUUHQW DVLQPHWKRG$ LVSDVVHG WKURXJK D ULJLG EDU RU IOH[LEOH FDEOH SODFHG ZLWKLQ DQG DSSUR[LPDWHO\ FRQFHQWULF ZLWK WKH WXEHERUH7KLVPHWKRGLVLQWHQGHG OLNHPHWKRG$ IRUWKHGHWHFWLRQRILPSHUIHFWLRQVZKLFK OLHJHQHUDOO\SDUDOOHOWRWKHGLUHFWLRQRIFXUUHQWIORZLQWKHWKUHDGHGEDUFDEOH

F  PHWKRG&HQFLUFOLQJFRLOPHWKRG,QWKLVPHWKRGDULJLGRUVHPLULJLGFXUUHQWFDUU\LQJFRLO LV SODFHG DURXQG WKH WXEH DQG WKH VXUIDFH RI WKH WXEH ZLWKLQ WKH LQIOXHQFH RI WKH FRLO LV PDJQHWL]HGLQWKHGLUHFWLRQSDUDOOHOWRWKHPDMRUD[LVRIWKHWXEHIDYRXULQJWKHGHWHFWLRQRI JHQHUDOO\WUDQVYHUVHLPSHUIHFWLRQV

G  PHWKRG'PDJQHWLFIORZPHWKRG,QWKLVPHWKRGWKHWXEHRUSDUWRILWIRUPVSDUWRIWKH PDJQHWLFFLUFXLWRIDQHOHFWURPDJQHWFDUU\LQJFXUUHQWIURPDQH[WHUQDOSRZHUVXSSO\ DVLQ PHWKRG$ 7KLVPHWKRGIDYRXUVWKHGHWHFWLRQRILPSHUIHFWLRQVO\LQJDWULJKWDQJOHVWRDQ LPDJLQDU\OLQHFRQQHFWLQJWKHSROHVRIWKHHOHFWURPDJQHW

127( 2WKHU PDJQHWL]DWLRQ WHFKQLTXH RU FRPELQDWLRQ RI WKH WHFKQLTXHV JLYHQ DERYH

PD\EHXVHGSURYLGHGWKHUHTXLUHPHQWVIRUILHOGVWUHQJWKDQGGLUHFWLRQDUHPHW

 ,W LV RXWVLGH WKHVFRSH RIWKLV SDUWRI (1  WR VSHFLI\ OHYHOV RI PDJQHWL]DWLRQ DQG FXUUHQWOHYHOVUHTXLUHGWRUHYHDOWKHSUHVHQFHRIXQDFFHSWDEOHVXUIDFHLPSHUIHFWLRQVGXHWRWKH ZLGHYDULHW\RIPDJQHWLFSDUWLFOHWHFKQLTXHVDYDLODEOHDQGSHUPLWWHGIRUWKLVSXUSRVH

+RZHYHULQDOOFDVHVWKHPDJQHWL]DWLRQUHTXLUHPHQWVDQGWKHXVHRISRZGHUVDQGVXVSHQVLRQV JLYHQLQSU(1,62SU(1,62DQGSU(1,62VKDOODSSO\

 'XULQJ WKH SURGXFWLRQ WHVWLQJ RI WXEHV WKH OHYHO RI PDJQHWL]DWLRQ DFKLHYHG XVLQJ WKH DGRSWHGWHFKQLTXHDQGHTXLSPHQWVKDOOEHFKHFNHGDWUHJXODULQWHUYDOVQRWH[FHHGLQJIRXUKRXUV XVLQJIRUH[DPSOHDIOX[LQGLFDWRURUPDJQHWLFILHOGVWUHQJWKPHWHUDVDSSURSULDWH

Trang 10

3DJH (1

‹%6,

 $&&(37$1&(/(9(/6

DQGRU WKH PD[LPXP SHUPLVVLEOH GLPHQVLRQV GLDPHWHU RU OHQJWK  KDYH EHHQ HVWDEOLVKHG LQ DFFRUGDQFHZLWKWDEOHVDQG

7DEOH7HVWLQJRIWXEHVXUIDFH3HUPLVVLEOHQXPEHUDQGGLPHQVLRQRI

LQGLFDWLRQVZLWKLQDIUDPHDSHUWXUHRIPP[PP

7\SHRILQGLFDWLRQV 5RXQGHG /LQHDU $FFXPXODWHG

$FFHSWDQFH

OHYHO 6SHFLILHG ZDOO

WKLFNQHVV

7

PP

1XPEHU PD[

'LDPHWHU PD[

PP

1XPEHU PD[

/HQJWK PD[

PP

1XPEHU PD[

&XPXODWLYH OHQJWK PD[

PP

0

0

0

0

Trang 11

(1

‹%6,

7DEOH7HVWLQJRIWKHZHOGVHDP3HUPLVVLEOHQXPEHUDQGGLPHQVLRQRI LQGLFDWLRQVZLWKLQDIUDPHDSHUWXUHPPORQJDQGPPZLGHLQDPP

ZLGHDUHDRQHLWKHUVLGHRIWKHZHOGVHDP

7\SHRILQGLFDWLRQV 5RXQGHG /LQHDU $FFXPXODWHG

$FFHSWDQFH

OHYHO 6SHFLILHG ZDOO

WKLFNQHVV

7

PP

1XPEHU PD[

'LDPHWHU PD[

PP

1XPEHU PD[

/HQJWK PD[

PP

1XPEHU PD[

&XPXODWLYH OHQJWK PD[

PP

0

0

0

0

VKRZVWKHPLQLPXPGLPHQVLRQEHORZZKLFKWKHLQGLFDWLRQVDUHQRWWREHWDNHQLQWRFRQVLGHUDWLRQ LQWKHFRUUHVSRQGLQJDFFHSWDQFHOHYHO

7DEOH0LQLPXPGLPHQVLRQRILQGLFDWLRQV

WREHFRQVLGHUHGIRUHYDOXDWLRQ

$FFHSWDQFH OHYHO 'LDPHWHURUOHQJWKRI WKHLQGLFDWLRQ

PLQ

PP

Ngày đăng: 14/04/2023, 00:22

TÀI LIỆU CÙNG NGƯỜI DÙNG

TÀI LIỆU LIÊN QUAN