PUL SE D E DDY IO N SERVIC ES DAC O N INSEPEC T CURRE NT (PE C) S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
Who we ar e Co nve ntio na l a nd Oil a nd Ga s, Re fine ry, Ove r 400 pe rso nne l T ha ila nd he a dq ua rte rs Adva nc e d NDT a nd Pe tro c he mic a l, He a vy inc luding mo re tha n with Inte rna tio na l Inspe c tio n Se rvic e s Industry, Mining 300 inspe c to rs e xpe rtise sinc e 1979 S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT T hic kne ss re a ding s thro ug h c o a ting s a nd insula tio n E le c tro ma g ne tic te c hniq ue fo r me a suring the thic kne ss o f ste e l o b je c ts suc h a s pipe a nd ve sse ls E ddy Curre nt se nso r is pla c e d o n to p o f the the rma l insula tio n Ma g ne tic fie ld g e ne ra te d in the ma te ria l By me a suring the dura tio n fo r e ddy c urre nt to “de c a y” a re fe re nc e to the thic kne ss o f the ma te ria l c a n b e ma de . S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Pr inc iple S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Ma g ne tic pulse se nt o ut • E ddy Curre nts g e ne ra te d in the (pe rme a b le ) ma te ria l • E ddy c urre nts g e ne ra te a ma g ne tic fie ld o f the ir o wn, a ffe c ting the re c e ive r c o il • S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT While pe ne tra ting the ma te ria l the e ddy c urre nts g e t we a ke r a nd de c a y • Whe n the E ddy c urre nts hit the b a c k wa ll a sudde n dro p in E ddy c urre nt stre ng th • ta ke s pla c e T he time o f b e twe e n the first pulse a nd whe n this sudde n dro p o ff ta ke s pla c e is a • me a sure fo r the thic kne ss o f the ma te ria l PE C signal 3 2 1 S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Applic a tio ns: CUI • I nsula te d Piping • I nsula te d Ve sse ls • I nsula te d T a nks • Hig h te mp a pplic a tio ns • Surfa c e s c o ve re d b y ma rine g ro wth • Offsho re rise rs • Ca isso ns • Po rt struc ture s, ste e l she e t piling • Ship hulls • Co mpo site wra p re pa ire d a re a s • Be hind c o nc re te fire pro o fing • Sphe re le g s • Ve sse l skirts • Bo ile rs • Co nc re te c o a te d pipe s • Po we r pla nt piping (F lo w Ac c e le ra te d Co rro sio n, F AC) • S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Applic a tio n e xa mple : Sphe re le g s S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Applic a tio n e xa mple : CUI Piping • T a nks • Ve sse ls • • S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Applic a tio n e xa mple : Offsho re Rise rs/ Ca isso ns S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Applic a tio n e xa mple : Sub se a a pplic a tio ns S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Ca pa b ilitie s Hig h te mpe ra ture no c o nc e rn (-100 to 550 De g re e s C) • 3-35 mm thic kne ss • Pipe dia me te r 3” to fla t • L ift o ff ra ng e 0-200 mm (up to 200 mm insula tio n • Ac c ura c y +/ - 10% • Me a sure thro ug h Aluminum a nd SS she e ting • Re sults hig hly re pe a ta b le , suita b le fo r c o rro sio n mo nito ring • S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Disadvantage s Can only be use d on fe r r o- magne tic mate r ials • Me asur e s var iations in wall thic kne ss within an obje c t, not absolute thic kne ss • Can’t me asur e thr ough galvanize d she e te d insulation • Small isolate d c or r osion pits c an be misse d. • Me asur e s the ave r age wall thic kne ss ove r the footpr int of the pr obe • De pe nds on size of pr obe and amount of lift off • S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Re po rting S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
PUL SE D E DDY CURRE NT Re por ting S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
How Can We He lp ? Contac t E ma il : info @ d a c o n-inspe c tio n.c o m Pho ne : +66 (0) 33 012 484-7 www.dac on- inspe c tion.c om S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE
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