HDPE PIPE L INE IO N SERVIC ES DAC O N INSPEC T INSPE CT ION - PowerPoint PPT Presentation

HDPE PIPE L INE IO N SERVIC ES DAC O N INSPEC T INSPE CT ION P R E S E N T A T I O N

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

Pr e se ntation Ove r vie w HDPE use d as T ailings L ine s for mining • E ro sio n in HDPE line s • Da c o n’ s invo lve me nt • HDPE Pipe De ve lo pme nt ac y Inspe c tion Ac c ur • Da ta Co mpa riso n vs. Ac tua l Co nd itio n • Ina c c ura c y Co ntrib utio ns • Re ma ining T hic kne ss fo r H3 • Inspe c tio n Re po rt fo r H3 • Re ma ining T hic kne ss fo r H4 Hyb rid • Re po rt o n HDPE Hyb rid line • Inspe c tio n Re po rt fo r H4 Hyb rid IL I Re c ove r y at Se a S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

HDPE IO N SERVIC ES DAC O N INSPEC T USE AS T AI L I NGS L I NE S F OR MI NI NG

E r osion in HDPE Pipe s Sinc e mine s sta rte d using HDPE line s fo r T a iling s tra nspo rt, e ro sio n in the b o tto m o f the se line s ha ve b e e n a n issue . A le a k wa s fo und in 2005 a nd a pro g ra m to inspe c t a nd ve rify the pipe c o nd itio n b e fo re it b e c o me s c ritic a l ha s sinc e b e e n in pla c e . S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

Da c o n’s invo lve me nt Da c o n Inspe c tio n Se rvic e s first sta rte d te sting Inte llig e nt Pig g ing fo r HDPE pipe s in 2001 a nd c o nd uc te d the first c o mme rc ia l inspe c tio ns in 2004. Mo re the n 150 hund re d c o mme rc ia l inspe c tio n runs in la rg e d ia me te r HDPE pipe line s ha s b e e n c o mple te d b y e nd o f 2009. T he te c hno lo g y Da c o n utilize s ha s b e e n spe c ia lly d e ve lo pe d fo r HDPE a nd pla stic s ma te ria l a nd pro vid e une q ua le d a c c ura c y a nd inspe c tio n c o ve ra g e . T his e na b le s HDPE Pipe line o wne rs to a c c ura te ly ve rify the c o nd itio n o f a ny line in re g a rd to re ma ining wa ll thic kne ss, d a ma g e s a nd inte g rity o f the pipe line . T hus e na b ling full F itne ss F o r Se rvic e (F F S) a nd inte g rity stud ie s o f the se line s. S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

HDPE Pipe De ve lopme nt • Until 2006 T a iling s L ine s we re 46.5” 85 mm HDPE • F r om 2006 T a iling s L ine s we re 48.0” 110 mm HDPE ate Ye ar E r osion gr oove width Appr ox. e r osion r 2005 - 2006 25 - 40 c m 3 mm/ mo nth 2006 - 2007 20 - 30 c m 5 mm/ mo nth 2008 10 - 25 c m 11 mm/ mo nth Ab o ve value s are a ppro xima te value s b ase d o n multiple inspe c tio ns a nd wo rst lo c a tio n S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

IO N SERVIC ES DAC O N INSPEC T INSPE CT ION ACCURACY S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

Inspe c tion Ac c ur ac y Pic ture L o c a tio n Ma na ul UT M Me a sure m e nt IL I Da ta * Me a a sure m e nt Va ria tio n m m 58 mm -3 mm Jo int -1 53 mm Jo int -2 54 mm 55 mm -1 mm Jo int -3 55 mm 56 mm -1 mm Jo int -4 52 mm 50 mm +2 mm 0 mm Jo int -5 56 mm 56 mm Jo int -6 51 mm 55 mm -4 mm Jo int -7 53 mm 50 mm +3 mm Jo int -8 53 mm 49 mm +4 mm Jo int -9 56 mm 58 mm -2 mm Jo int -10 55 mm 52 mm +3 mm Ba se d o n wha t wa s le a rnt fro m the c o rre la tio n b e twe e n a c tua l thic kne ss a nd IL I d a ta inte rpre te d thic kne ss, it is c le a r tha t the thic kne ss a c c ura c y is q uite c lo se to re a l wo rld thic kne ss. So me va ria tio ns will a lwa ys b e e nc o unte re d d ue to the physic a l c o nfig ura tio ns a nd / o r d a ma g e / d isfig ura tio n to the pipe . T he wo rst c a se va ria tio n in L ine “A” using the hig he st a nd lo we st d iffe re ntia tio n tha t wa s ind ic a te d in the a b o ve ta b le will se t a ma rg in o f e rro r a t: +/ - 4 mm. S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

Data Compar ison vs. Ac tual Condition No rma lly 3 IL I to o ls is use d fo r e a c h Sinc e 2007 a ne w inspe c tio n a nd a na lyzing inspe c tio n, e a c h o f the se g e ne ra ting so ftwa re wa s intro d uc e d to e a se the po st o ve r 80 millio n thic kne ss me a sure me nts. inspe c tio n ve rific a tio n. T he se me a sure me nts a re plo tte d in b o th 2D a nd 3D. E ve ry o ne me te r o f pipe typic a lly g e ts a ppro x. 25 000 me a sure me nts. S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

Inac c ur ac y Contr ibutor s T he re a re se ve ra l fa c to rs tha t c o ntrib ute to ma king the d a ta le ss c o mpa tib le , the se inc lud e : • Due to the c urva ture o f the g ro o ve inte rna lly, mo st me a sure me nts ha ve to b e ta ke n fro m the o utsid e using PT NNT ’ s ha nd • E xte rna lly o n the 10 sa mple jo ints the re a re q uite se ve re sc ra ping ma rks whic h a lso pre ve nt me a sure me nts in ma ny lo c a tio ns. • T he thinne st lo c a tio n in mo st jo ints is e xa c tly a t the jo int. Ho we ve r, d ue to the e xte rna l pipe o ve rla p a t the jo int, c o mb ine d with to e -in c re e p, me a sure me nts c a nno t a lwa ys b e ma d e a t the a b so lute thinne st po int. L e ft side : Illustra tio n o f the to e -in c re e p se e n e xte rna lly a t a Jo int 1. Re d line ind ic a te s the stra ig ht line . L e ft side : Inte rna l jo int, d e fle c tio n o f a ng le s c a use d b y e ro sio n, e xa c tly a t jo int itse lf. S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

Re maining T hic kne ss for H3 Ave rag e thic kne ss fro m I L I 1, 2 & 3. T hic kne ss in mm, dista nc e in me te r. I ndividual I L I data o ve rlaid. T hic kne ss in mm, distanc e in me te r. S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

Inspe c tion Re por t for H3 T ypic al jo int C Sc an Jo int 65 C Sc an S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

Inspe c tion Re por t for H3 ypic al B Sc an o f no mina l g ro o ve . ypic al B Sc an se c o ndary e ro sio n T T S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

Re maining T hic kne ss for H4 Hybr id • No te : T he first pa rt o f the g ra ph is fo r the ne w line a nd the thic kne ss is he re 100% (no t ye t use d ). • T he se c o nd ha lf is the o ld pro c e ss line (36 PE 001H3) with e ro sio n g ro o ve . T he spike s c o ming d o wn fro m the g e ne ra l g ra ph is e a c h jo int, whic h typic a lly a re 10-20 mm thinne r the n the a d jo ining pa rt. S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

Re por t on HDPE Hybr id line T ypic al 200 me te r se c tio n, c le arly marke d b y the “e xtrusio n marks” (se e b lue line ) • T he g e ne ra l e ro sio n g ro o ve in the o ffsho re se c tio n o f the pipe va rie s in d e pth b e twe e n 55 to 70 mm re ma ining wa ll thic kne ss a nd is 250 –300 mm wid e a nd runs the e ntire le ng th o f the o ld pipe . • E a c h 15 me te r se c tio n o f pipe typic a lly a ppe a rs to ha ve 2 “e xtrusio n ma rks” a ppro x. 90 a pa rt. T he se ma rks a re typic a lly 250 mm (10”) wid e e a c h a nd a re e a sily se e n in e a c h pipe a s b a c k wa ll lo ss. T he re a re slig ht o ffse ts a t e a c h jo int. S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

Inspe c tion Re por t for H4 Hybr id ypic al B with e ro sio n g ro o ve T T ypic al B Sc an (pipe c ro ss se c tio n) with no e ro sio n g ro o ve I n b o th a b o ve c ro ss se c tio n vie ws b ac k wall lo ss c an b e se e n a s re d stripe s. S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE

IO N SERVIC ES DAC O N INSPEC T IL I RE COVE RY AT SE A

IL I Re c ove r y at Se a Cur r e nt Me thod for IL I r e c ove r y at se a: Dive r jumps into the se a to a tta c h ho isting sling s a ro und the IL I . T he IL I is the n ho iste d o nto b o a t d e c k. S FO R A LL YO UR INSPEC TIO N NEED S DACON INSPE CT ION SE RVICE