Umuyoboro w'icyuma wa DNV-OS-F101 L450 SAWL Subsea Pipeline: Ubushobozi bwo gukora n'ibisobanuro by'ibicuruzwa

Kuki Womic Steel ikoreshwa mu gukwirakwiza imiyoboro ya DNV Offshore?

● Uruganda rwemewe na DNV GL mu gukora imiyoboro ya SAWL

● Uburyo bwa UOE bufite toni 6,000 za O-press na expander ya segment 72 - ovality ≤ 0.15%

● Ubushobozi bwo gupima CTOD mu kigo (Laboratwari yemewe na CNAS)

● Amateka menshi mu mishinga ya North Sea, Brezili, na Afurika y'Iburengerazuba

● Ubushakashatsi bw'umuntu wa gatatu bwakozwe na DNV, ABS, BV, cyangwa uhagarariye abakiriya

● Kubahiriza byimazeyo DNV-OS-F101 (harimo n'umugereka A, B, D uko bisabwa)

Ibibazo Bikunze Kubazwa:

Q: Ni irihe tandukaniro riri hagati ya DNV-OS-F101 L450 na API 5L X65 ku mazi yo munsi y'inyanja?
A: DNV-OS-F101 yanditswe by'umwihariko ku miyoboro y'amazi yo mu nyanja. Itandukaniro ry'ingenzi: kwihanganira cyane uburebure bw'umurambararo (0.2% vs 0.5%), gupima uburemere bw'amagufwa ya CTOD (bidasabwa na API 5L), ibisabwa byinshi ku ngaruka za Charpy (akenshi 50J vs 27J), ibindi bisabwa kugira ngo habeho guhangana no kugwa no gushushanya umunaniro. Ku mishinga yo mu mazi menshi, DNV ni yo ikoreshwa cyane.

Q: Ese mutanga ibizamini bya CTOD ku byuma bisudira na HAZ?
A: Yego. Dukora ikizamini cya CTOD (Crack Tip Opening Displacement) hakurikijwe BS 7448 cyangwa ASTM E1820. Dushobora gupima kuri -20°C, -30°C, -46°C, cyangwa nkuko byavuzwe. Ibisubizo bisanzwe: icyuma cya welded δ ≥ 0.35mm, HAZ δ ≥ 0.40mm. Ikizamini cya CTOD gitangwa n'umushakashatsi wa DNV.

Q: Ese ushobora gutanga L450 kuri serivisi ya sour (H₂S)?
A: Yego. Dutanga L450 hamwe n'inyongeramusaruro ya serivisi ya sour kuri DNV-OS-F101 Annex A. Ibi bisaba CEV iri hasi (≤ 0.40%), kongeramo Mo (0.15-0.25%), PWHT, ubukana ≤ 85 HRB, hamwe n'ibizamini bya HIC/SSC. Twatanze serivisi ya sour L450 ku mishinga yo mu Nyanja ya Ruguru no mu Burasirazuba bwo Hagati.

Q: Ni ubuhe burebure bw'amazi bushobora kwihanganira imiyoboro yawe?
A: Ubudahangarwa bwo kugwa buterwa n'igipimo cya D/t (umurambararo/ubunini bw'urukuta), uburebure, n'imbaraga z'umusaruro. Ku muyoboro usanzwe wa L450 UOE ufite D/t = 30 (urugero, 610mm × 20mm) n'uburebure bwa 0.2%, igitutu cyo kugwa kirenze 30 MPa (kingana na metero 3.000 z'ubujyakuzimu bw'amazi). Ku mazi maremare, dushobora gushushanya inkuta nini cyangwa uburebure bwa uburebure. Nyamuneka tanga ubujyakuzimu bw'amazi yawe n'igitutu cy'igishushanyo cyawe kugira ngo usuzume imiterere yo kugwa.

Q: Ese isuzuma rya DNV rikenewe kuri buri koherezwa?
A: DNV-OS-F101 isaba ko uruganda rufite sisitemu yemewe y’ubuziranenge kandi ko umusaruro ukorerwa isuzuma na DNV ahantu hagenwe n’abahamya (urugero: ikizamini cya hydrostatic, CTOD, igenzura ry’ibipimo). Ikigo cya Womic gikorerwa igenzura buri mwaka na DNV. Kuri buri komande, dukoresha abapima ba DNV kugira ngo babone ibizamini bikenewe. Dushobora kandi gutegura isuzuma rya ABS, BV, cyangwa LR iyo umukiriya abisabye.

Q: Igihe gisanzwe cyo gutanga umuyoboro wa L450 wemewe na DNV ni ikihe?
A: Iminsi 90-120, harimo na gahunda y'ubushakashatsi bwa DNV. Igihe cyo gutanga umusanzu giterwa n'uko plaque ziboneka (plaque za TMCP zo mu mazi zifite igihe kirekire cyo gutanga umusanzu, akenshi ibyumweru 10-14). Isuzuma rya CTOD ryongeraho ibyumweru 2-3. Ku bicuruzwa bisubirwamo hamwe na plaque zujuje ibisabwa mbere, igihe cyo gutanga umusanzu gishobora kugabanywa kikagera ku minsi 60-75.

Icyitonderwa cy'umushinga - Umuyoboro wo kohereza imyuka yo mu mazi y'uburengerazuba muri Afurika y'Iburengerazuba (Ikigobe cya Gineya)

Igihugu:Inkombe z'inyanja ya Nijeriya / Akarere k'umupaka wa Guinée Equatorial (Ikigobe cya Guinée)
Igipimo n'Icyiciro:DNV-OS-F101 L450 SAWL (UOE) hamwe n'inyongeramusaruro y'ubuziranenge
Ingano n'ingano:

l OD 610mm (24″) × Ubwinshi 20.6mm – 52.000 metero (hafi toni 13.500) byakozwe na UOE process

l OD 610mm (24″) × Ubwinshi 25.4mm – 8.000 metres (hafi toni 2.500) byakozwe na UOE process (igice cyo kuzamuka n'uburyo bwo ku nkombe)
Igiteranyo:Metero 60.000 (km 60), hafi toni 16.000

Ibisobanuro:Irangi ryo hanze rya 3LPE (3.2mm) rifite uburemere bwa sima (60mm, ubucucike bwa 3,050 kg/m³) kugira ngo ribe ridafite ubushobozi bwo kugenda neza. Impande zikozwe neza 30°/1.6mm. Isuzuma ry'amazi kuri 25.0 MPa (igitutu cy'igishushanyo 18.0 MPa). Ubujyakuzimu bw'amazi: 800-1,400m. Irangi risabwa kuri -20°C (ubugari bwa 50J, ryagezweho 120-180J). CTOD kuri -20°C: icyuma cyometseho ≥ 0.25mm, HAZ ≥ 0.30mm (yagezweho 0.40-0.65mm). DWTT kuri -20°C: ubuso bwo gukata ≥ 85% (yagezweho 90-98%). Ubugari bwa ovali ≤ 0.2% (UOE yagezweho 0.08-0.15%). Ubukomere ≤ 85 HRB (serivisi y'ubushyuhe). HIC kuri NACE TM0284: CLR 0%, CTR 0%, CSR 0%. SSC kuri NACE TM0177: nta gucikagurika. 100% UT hamwe na TOFD, hamwe na 25% RT. Ubushakashatsi bw'umuntu wa gatatu bwakozwe na DNV GL mu gihe cyose cyo gukora.

Porogaramu:Umuyoboro wo kohereza gaze mu mazi y’ubujyakuzimu utwara gaze karemano iva mu misozi miremire (ubujyakuzimu bw’amazi ni metero 800-1.400) ijya ku gice cy’ubutaka cya LNG kiri ku nkombe. Umuyoboro wa kilometero 60 urimo igice cy’amazi y’ubujyakuzimu (kilometero 52, 20.6mm WT), igice cy’ubujyakuzimu buhindagurika (kilometero 4, 25.4mm WT), n’inzira yo ku nkombe inyura mu gace k’amasufe (kilometero 4, 25.4mm WT hamwe n’igitambaro cya sima). Gazi irimo H₂S (5-10 ppm) na CO₂ (3-5%), bisaba ko serivisi idakora neza.

Ibibazo bya tekiniki n'ibisubizo:

1. Ubudahangarwa bw'amazi y'ubujyakuzimu (ubujyakuzimu bwa metero 1,400)– Umuvuduko w’amazi uturutse hanze kuri metero 1,400 ni hafi 14.3 MPa. Umuvuduko wo gupfuka ukenewe hamwe n’igipimo cy’umutekano ni > 25 MPa. Womic yakoze umuyoboro wa UOE wa 24″ × 20.6mm ufite D/t = 29.6. Dukoresheje uburyo bwa UOE, twageze ku gipimo cya oval cya 0.08-0.12% (munsi cyane y’umupaka wa DNV wa 0.2%). Twakoze isesengura ry’ibintu bito (FEA) n’isuzuma ry’umuvuduko wo gupfuka ku rugero rwuzuye ku bipimo bibiri. Umuvuduko wo gupfuka wagezweho: 27.8 MPa na 28.5 MPa - byombi biri hejuru y’ibisabwa.

2. Uburemere bwa CTOD bwo gucika intege ku gikoresho gikurura imirasire (dynamic riser)– Igice cyo kuzamuka cy’umuyoboro w’amazi kigira umunaniro mwinshi bitewe n’ingendo z’imitsi n’imiraba. DNV isaba isuzuma rya CTOD kuri -20°C. Womic yakoze CTOD ku byuma byometseho ubushyuhe na HAZ ku miyoboro ya 25.4mm WT. Ibisubizo: icyuma cyometseho ubushyuhe δ = 0.42-0.55mm, HAZ δ = 0.48-0.65mm. Twanatanze imiyoboro ya SN yometseho ubushyuhe kugira ngo ifashe umukiriya gusuzuma ubuzima bw’umunaniro.

3. Serivisi y'umusemburo irimo H₂S y'inyuma– Nubwo igipimo cya H₂S kiri hasi (5-10 ppm), umushinga wasabye serivisi yuzuye y’ubushyuhe bitewe n’umuvuduko mwinshi (18 MPa) n’ibyago byo kwangirika mu gace runaka. Womic yakoresheje plaque za sulfur nkeya (S ≤ 0.0010%), CEV ≤ 0.38%, Mo yongewemo 0.20%, na PWHT kuri 580°C mu gihe cy’amasaha 1.5. Ubukomere nyuma ya PWHT: icyuma cy’ibanze 78-82 HRB, weld 80-85 HRB. Ibizamini bya HIC na SSC byatsinze nta mvune.

4. Gusiga uburemere bwa beto no guhuza 3LPE– Igice cyo kugera ku nkombe cyasabaga gusiga uburemere bwa sima (mm 60, gikomejwe n'icyuma) kugira ngo hasi habeho uburimbane. Gusiga sima byashyizwe hejuru ya 3LPE hamwe n'icyuma gifatana. Womic yahujwe n'ikigo cyihariye cyo gusiga muri Angola. Twatanze amakarita yo gupima kugira ngo dukore neza kandi dupime ingaruka. Gusiga sima byatsinze ikizamini cyo gusiga (1m igwa, nta gucika).

5. Guhuza ishyirwaho rya reel-lay– Umuyoboro washyizweho hakoreshejwe uburyo bwo gushyiramo uruziga (bushyizwe ku gikoresho cyo kuzunguruka). Ibi bisaba kugenzura cyane uburebure bw'uruziga (≤ 0.2%) no gusimbuza uburebure bw'umuyoboro ≤ 0.5mm. Ubugari bw'uruziga bugenzurwa n'abagore kugeza kuri 0.08-0.15% n'imigozi yo gusimbuza hasi kugeza kuri ≤ uburebure bwa 0.3mm. Twakoze imikino 10 yo gusimbuza uruziga ku muyoboro w'igerageza - nta gucika cyangwa kwangirika kw'uruziga.

6. Ubushakashatsi bwa DNV n'inyandiko– Abashakashatsi ba DNV babonye isuzuma rya hydrostatic, CTOD, HIC, SSC, n'igenzura ry'ibipimo kuri buri cyiciro. Womic yatanze dosiye y'ubuziranenge y'amapaji 1.500 (harimo raporo zose z'ibizamini, imbonerahamwe za PWHT, inyandiko za UT, n'inyandiko z'umugenzuzi) mu byumweru 4 nyuma yo koherezwa. Dosiye yemejwe nta bibazo.

7. Ibisubizo:Umuyoboro washyizwemo neza mu gihembwe cya kabiri cya 2025 hakoreshejwe ubwato bunini bwa Deep Constructor. Nta kintu na kimwe cyabaye mu gihe cyo gupima, gushyira mu bikorwa, cyangwa nyuma yo gupima. Umuyobozi w'umushinga w'umukiriya yagize ati: “Igenzura ry'ingufu za Womic n'ibyavuye mu ikoranabuhanga rya CTOD byarenze ibyo twari twiteze. Imiyoboro yasutswe mu buryo buhoraho mu murima, aho 98% byemewe mu buryo bwa mbere.” Womic Steel ubu iri ku rutonde rw'abatanga gazi mu yindi mishinga ibiri yo kohereza mu mahanga gaze yo mu mazi menshi muri Afurika y'Iburengerazuba.

Umuntu wo kuvugana nawe:
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Imeri: sales@womicsteel.com

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Womic Steel – Umufatanyabikorwa wawe wiringirwa w’imiyoboro y’icyuma ya DNV-OS-F101 L450 SAWL yo kohereza imyuka yo mu mazi yo mu burengerazuba, inzira zo munsi y’inyanja, n’uburyo bwo kuzamuka mu mazi ku isi yose.