VISUAL UL T RASONIC IO N SERVIC ES DAC O N INSPEC T T E ST - PowerPoint PPT Presentation

ADVANCE VISUAL UL T RASONIC IO N SERVIC ES DAC O N INSPEC T T E ST ING INSPE CT ION

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

e sting Visual T • Old e st a nd mo st wid e ly use d inspe c tio n Me tho d • Ofte n e ye s o f inspe c to r use d is the o nly inspe c tio n e q uipme nt use d • Dire c t visua l te sting : Whe n a c c e ss a llo ws e ye s to b e within 25 inc h o f surfa c e to b e e xa mine d a nd within a n a ng le no t le ss tha n 30 d e g re e s to the inspe c tio n surfa c e • Re mo te visua l inspe c tio n: F o r inspe c tio n o f re stric te d a c c e ss a re a ’ s S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

e sting Visual T F or dir e c t visual te sting he r e ar e a var ie ty of optic al aids available : • Ma g nifie rs • Inspe c tio n mirro rs (whe n e ye c a nno t b e put in re c o mme nd e d vie wing ra ng e ) • Mic ro sc o pe • T e le sc o pe s • Ca me ra ’ s In addition to this some othe r e quipme nt is ofte n par t of visual te sting: • Ve rnie r c a lipe rs • Mic ro me te r • Pit g a ug e • Sc ra pe r • Dig ita l c a me ra S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

e sting Visual T Impor tant fac tor s in Visual inspe c tion: Visual ac uity of the inspe c tor • Ne a r d ista nc e a c uity , re a d ing a c ha rt a t c e rta in d ista nc e • Co lo r b lind ne ss, Ishiha ra te st c ha rts L ighting c onditions • Me a sure the lig ht inte nsity • Amo unt o f lig ht b e twe e n 350-1000 L ux d e pe nd ing o n c o d e re q uire me nts • Use o f a rtific ia l lig ht (fla shlig hts) • Use o f sunlig ht (mirro rs) Cle anline ss of sur fac e • No rma lly a c le a n surfa c e is re q uire d to d e te c t d isc o ntinuitie s • Re mo ve • Sc a le • Pa int • De b ris S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

e sting Visual T Impor tant fac tor s in Visual inspe c tion: Visual angle and distanc e • E ye s to b e within 25 inc h o f surfa c e to b e e xa mine d • E ye s to b e within a n a ng le no t le ss tha n 30 d e g re e s to the inspe c tio n surfa c e Pe r c e ption • L e ng th o f a rro ws ? Re fle c tanc e and bac k gr ound • T he a mo unt o f lig ht tha t is re fle c te d fro m a b a c kg ro und is o f g re a t influe nc e T e mpe r atur e (he at wave distor tion) • He a t wa ve s c o ming o ff fro m ite m d isto rting the vie w S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

e sting Visual T Impor tant fac tor s in Visual inspe c tion: Physic al c omfor t Ca n b e o f g re a t influe nc e (a pplic a b le fo r e ve ry inspe c tio n a nd NDT e xa mina tio n) • Co mfo rta b le a rra ng e me nt fo r inspe c to r will re sult in g re a te r a tte ntio n to d e ta il • Inspe c tio n fro m a wkwa rd po sitio n ma y re sult in misse d ind ic a tio ns Inspe c to r ma y hurry e xa mina tio n in o rd e r to g e t b a c k into c o mfo rta b le po sitio n S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

e sting Visual T Re mote Visual T e sting (RVI) F or inspe c tion of inac c e ssible ar e a’s • Sma ll b o re d pipe s o r tub e s • Pre ssure ve sse ls o r ta nks whic h c a nno t b e e nte re d (no t g a s fre e e tc ) T ypic al e quipme nt to be use d: • Bo re sc o pe s  Rigid bor e sc ope s (le ns- optic ) • Co nta ins a tra in o f le nse s • L ig ht so urc e a t the e nd o f sc o pe to illumina te a re a o f inte re st  F ibe r sc ope s (fibe r - optic ) • Use s a g la ss fib e r b und le • L ig ht is tra nsmitte d to the inspe c tio n a re a via g la ss fib e r • T he lig ht re fle c te d o f the o b je c t is se nd b a c k to vie wing e nd via the g la ss fib e r S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

e sting Visual T Re mote Visual T e sting (RVI) T ypic a l e q uipme nt to b e use d (c o ntinue d ): Came r a’s (Vide o sc ope s) F ibe r c ame r a • L ig ht is tra nspo rte d to a re a o f inte re st b y fib e r o ptic b und le • L ig ht wa ve s fo rm the o b je c t pa ss thro ug h a le ns a nd will hit a CCD (c ha rg e d c o uple d d e vic e ) • CCD c o nve rts the wa ve s into e le c tro nic sig na ls whic h a re tra nsmitte d to a CCU • CCU pro c e sse s re c e ive d sig na ls to pro d uc e a “pic ture ” o n a vid e o sc re e n • L imita tio n to the le ng th the fib e r b und le s c a n b e ma nufa c ture d S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

e sting Visual T Re mote Visual T e sting (RVI) T ypic a l e q uipme nt to b e use d (c o ntinue d ): Mini c ame r a’s • L ig ht so urc e is pla c e d a t the a re a o f inte re st via e le c tric a l wire • Big g e r size re q uire d b e c a use a ring o f lig ht will ha ve to b e pla c e d a t the tip. • L e ng th c a n b e b ig g e r tha n F ib e r c a me ra • Va ria tio n the F ib e r is tra nspo rte d to a re a o f inte re st b y fib e r o ptic b und le • Princ iple o f o pe ra tio n simila r to fib e r c a me ra with CCD S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

e sting Visual T Re mote Visual T e sting (RVI) T ypic a l e q uipme nt to b e use d (c o ntinue d ): Came r a’s with Pan, T ilt , Zoom le ns • Are a va ila b le with lo ng c a b le a nd re a c h (up to hund re d s o f me te rs) • Big g e r size , re q uire s:  Mo to r c o ntro ls fo r re mo te o pe ra tio n o f le ns  Mo to r c o ntro ls fo r pa nning a nd tilting  Mo re lig ht (ne e d to c o ve r se ve ra l zo ne s fo r lo ng e r vie wing d ista nc e a nd fo r c lo se up) • Pa nning a nd tilting a llo ws the c a me ra to b e po sitio ne d in a lmo st e ve ry po sitio n S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

e sting Visual T Re mote Visual T e sting (RVI) T ypic a l e q uipme nt to b e use d (c o ntinue d ): Re mote ope r ate d ve hic le s (ROV) • T he te rm ROV is mo st o fte n use d fo r Re mo te ly o pe ra te d und e rwa te r ve hic le s  Se lf pro pe lle d sub ma rine like ve hic le s tha t c o nta in a c a me ra a nd c a n b e re mo te ly o pe ra te d  Cra wle r, tra c to rs 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