ADVANCE D ADVANCE UL T RASONIC UL T RASONIC INSPE CT ION DAC O N INSPEC T IO N SERVIC ES INSPE CT ION T OF D
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
Ope r ational E xc e lle nc e - Our Custome r s FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D • T OF D = T ime of F light Diffr ac tion • Was or iginally de signe d for ac c ur ate sizing of flaws in nuc le ar industr y • Was found that the te c hnique is also e ffe c tive for de te c tion of flaws in we lds • Use s the diffr ac te d sound whic h initiate s at flaw tips whe n a flaw is “hit” by a wide UT be am • F laws c an be de te c te d r e gar dle ss of the or ie ntation of the flaw • Use s longitudinal sound FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D Pr inc iple of Diffr ac tion Diffra c te d UT sig na ls c a n b e c o mpa re d to the wa ve s tha t will o c c ur a ro und the e nd s o f a pie c e o f wo o d flo a ting in wa te r whe n it is hit b y inc o ming wa ve s FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D Pr inc iple of Diffr ac tion FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D • 2 Pr obe s opposite e ac h othe r . • 1 tr ansmitting and 1 r e c e iving the signals FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D • Use longitudinal sound • T r ansduc e r s with a high band width ar e use d to flood as muc h of the mate r ial thic kne ss, r e sulting in good c ove r age FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D A- sc an pr e se ntation of the T OF D signal • L ate r al wave • Bac k wall e c ho • Mode c onve r te d (she ar wave s) Rx T x L ate r al Bac k wall She ar FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D A- sc an pr e se ntation of the T OF D signal, whe n de fe c t is pr e se nt • L ate r al wave • Bac k wall e c ho • De fe c t uppe r tip signal • De fe c t lowe r tip signal FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D T OF D sc an image pr e se ntation • A- sc an ar e stac ke d toge the r to for m a gr e y sc ale image • T he image give s a pr e se ntation similar to a r adiogr aph (d iffe re nc e is tha t the we ld will b e “lo o ke d thro ug h” fo rm the sid e in ste a d o f the to p) - 100% +100% L a te ra l wa ve (Sc a n Surfa c e ) Ba c kwa ll She a r mo de sig na ls fro m b a c kwa ll FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D Ne ar Sur fac e Cr ac k 1 2 FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D Inc omple te Root Pe ne tr ation 1 1 2 3 2 3 FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
Advanc e d Ultr asonic Inspe c tion T OF D Adva nta g e s & Disa dva nta g e s Advantage s Disadvantage s • Ac c ura te Sizing • Ha s a d e a d zo ne a t the inspe c tio n surfa c e , le ss a pplic a b le o n thin wa ll • No t d e pe nd e nt o n fla w o rie nta tio n • No la te ra l po sitio n o f d e fe c t (tra nsve rse • Give s a pe rma ne nt re c o rd po sitio n in the we ld) • Re pe a ta b ility, g o o d fo r mo nito ring • Re q uire s e xpe rie nc e d te c hnic ia n fo r inte rpre ta tio n • F a st sc a nning a nd e a sy se t up • E xisting c o d e s c a n no t a lwa ys b e a pplie d • No ra d ia tio n invo lve d (so lve d b y ASME c c 2235 a nd 181) FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
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 FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE S
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