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

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

Feb 13, 2023 1.1k likes •1.26k views

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

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SLIDE 1

ADVANCE UL T RASONIC INSPE CT ION

DAC O N INSPEC T IO N SERVIC ES

VISUAL T E ST ING

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SLIDE 2

Who we ar e

Co nve ntio na l a nd Adva nc e d NDT a nd Inspe c tio n Se rvic e s Oil a nd Ga s, Re fine ry, Pe tro c he mic a l, He a vy Industry, Mining Ove r 400 pe rso nne l inc luding mo re tha n 300 inspe c to rs T ha ila nd he a dq ua rte rs with Inte rna tio na l e xpe rtise sinc e 1979

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SLIDE 3

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED S

  • 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
  • r inspe c tio n o f re stric te d a c c e ss a re a ’ s

Visual T e sting

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SLIDE 4

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED S

F

  • r

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

Visual T e sting

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SLIDE 5

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED S

Visual T e sting

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

  • 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
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SLIDE 6

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED S

Visual T e sting

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

  • und
  • 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
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SLIDE 7

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED S

Visual T e sting

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

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SLIDE 8

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED S

Visual T e sting

Re mote Visual T e sting (RVI)

F

  • r

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

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SLIDE 9

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED S

Visual T e sting

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

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SLIDE 10

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED S

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

Visual T e sting

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SLIDE 11

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED S

Visual T e sting

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
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SLIDE 12

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED S

Visual T e sting

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
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SLIDE 13

DACON INSPE CT ION SE RVICE S

FO R A LL YO UR INSPEC TIO N NEED 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