DNV-OS-F101 L450 SAWL Cov Yeeb Nkab Hlau Subsea: Kev Muaj Peev Xwm Tsim Khoom & Cov Khoom Qhia Tshwj Xeeb Duab Tshwj Xeeb

DNV-OS-F101 L450 SAWL Cov Yeeb Nkab Hlau Subsea: Kev Muaj Peev Xwm Tsim Khoom & Cov Lus Qhia Txog Khoom

Kev Piav Qhia Luv:

Womic Steel muab cov yeeb nkab hlau DNV-OS-F101 L450 SAWL (Submerged Arc Welded Longitudinal) zoo rau cov kav dej hauv qab dej thiab ntug dej hiav txwv. L450 muaj lub zog tsawg kawg nkaus ntawm 450 MPa (65,300 psi), sib npaug rau API 5L X65, nrog rau cov kev cai ntxiv rau kev siv ntug dej hiav txwv suav nrog kev tawg tawv (CTOD), kev tiv thaiv kev tawg, thiab kev ua haujlwm qaug zog. Cov txheej txheem SAWL (LSAW) siv UOE lossis JCOE tsim nrog kev nthuav dav kho tshuab kom ua tiav qhov kev kam rau siab nruj rau kev teeb tsa dej tob. Sab nraud txoj kab uas hla los ntawm 219mm txog 1,220mm (8″ - 48″) rau UOE, phab ntsa tuab los ntawm 6.0mm txog 40mm, ntev txog 24m. Daim ntawv pov thawj zeb nrog EN 10204 3.2, 100% UT nrog TOFD, hydro xeem, CTOD xeem, DWTT, thiab tag nrho traceability. Haum rau cov kab xa tawm roj hauv dej tob, cov kab ntws hauv qab dej hiav txwv, cov chaw nres nkoj tawm ntawm ntug dej hiav txwv, thiab cov kav dej sib txuas.

LSAW Hlau Yeeb Nkab Loj:Sab Nraud Txoj Kab uas hla: 219mm – 1,220mm (8″ – 48″) rau UOE; txog li 1,600mm (63″) rau JCOE/dov phaj, Phab Ntsa Thickness: 6.0mm – 40mm (UOE), txog li 60mm rau JCOE, Ntev: 12m – 24m tus qauv

Tus Qauv & Qib ntawm LSAW Steel Pipe:DNV-OS-F101 L450 (sib npaug rau API 5L X65); kuj muaj L360, L415, L485; nrog rau kev pabcuam ntxiv

Kev siv LSAW Steel Pipe:Cov kav dej xa tawm roj av tob (qhov tob ntawm dej > 1,000m), cov kav dej roj thiab roj av hauv qab dej hiav txwv, cov kav dej tawm hauv hiav txwv (dynamic thiab static), cov kav dej sib txuas, cov kav dej sib txuas, cov ntug dej hiav txwv (cov kav dej hla thaj chaw surf), cov khoom sib txuas hauv hiav txwv.

Womic Steel muab cov yeeb nkab hlau DNV-OS-F101 L450 SAWL zoo thiab sib tw nqi ntawm DNV-OS-F101 L450 SAWL, yeeb nkab kab hauv qab dej hiav txwv, yeeb nkab UOE offshore, yeeb nkab DNV tau ntawv pov thawj. Daim ntawv pov thawj zeb EN 10204 3.2, hydro test, UT/TOFD, CTOD, DWTT, beveled end, 3LPE/3LPP txheej muaj. Lub Hoobkas ncaj qha muab khoom rau cov haujlwm EPC offshore thoob ntiaj teb.

Xa email rau peb Cov Lus Qhia Txog Khoom

Cov Khoom Qhia Txog Khoom

Cov Cim Npe Khoom

1. Womic Steel: Kev Muaj Peev Xwm Tsim Khoom & Lub Zog ntawm Lub Tuam Txhab

Womic Steel Group tuav DNV GL kev pom zoo rau kev tsim cov kav dej SAWL raws li DNV-OS-F101. Tus qauv no muaj cov kev cai nruj dua li API 5L rau cov kav dej hauv hiav txwv, suav nrog:

● Kev kam rau siab dua ntawm qhov ntev (ovality ≤ 0.2% rau UOE, ≤ 0.3% rau JCOE)

● Yuav tsum tau kuaj xyuas qhov tawv ntawm qhov tawg (CTOD - Qhov Qhib Ntawm Qhov Tawg)

● Qhov yuav tsum tau muaj zog ntau dua (feem ntau yog 50J min ntawm -20°C)

● Cov kev txwv ntawm qhov nyuaj ntawm kev vuam (feem ntau ≤ 85 HRB rau kev pabcuam qaub, ≤ 90 HRB rau cov tsis qaub)

● Kev taug qab tag nrho los ntawm lub phaj mus rau cov yeeb nkab tiav

● Kev soj ntsuam los ntawm DNV lossis lwm lub koom haum lees paub txog kev faib tawm

Cov txheej txheem tsim khoom: UOE (nyiam dua rau cov dej tob vim nws qhov puag ncig zoo dua thiab qhov tsis tshua muaj kev ntxhov siab) thiab JCOE. Womic's UOE kab suav nrog hydraulic O-press (6,000t) thiab mechanical expander (72 ntu) ua tiav ovality ± 0.15%.

Muaj peev xwm ua tau txhua xyoo ntawm DNV-certified LSAW:40,000 tons.

Kev Yooj Yim Tsim Khoom rau DNV-OS-F101 L450:

● UOE: 508–1,220mm OD × 6.0–40.0mm WT × ≤ 24m (nyiam dua rau dej tob)

● JCOE: 406–1,422mm OD × 6.0–50.8mm WT × ≤ 18m (rau cov dej ntiav thiab ntug dej hiav txwv)

● Txhua lub kav dej tau txais 100% UT nrog TOFD, hydrotest, thiab CTOD kev kuaj raws li qhov xav tau.

2. DNV-OS-F101 L450: Cov Khoom Siv Sib xyaw & Cov yam ntxwv ua tau zoo

DNV-OS-F101 L450 sib npaug rau API 5L X65 tab sis muaj cov kev cai ntxiv rau kev siv hauv hiav txwv. Lub npe "L" qhia txog cov yeeb nkab kab, thiab "450" yog lub zog tsawg kawg nkaus hauv MPa.

Cov Tshuaj Lom Zem (qhov siab tshaj plaws % los ntawm pawg, feem ntau rau L450):

Khoom	DNV-OS-F101 L450 (ib txwm)	Kev Pab Cuam Qab Zib (xaiv tau)
C	≤ 0.12 (feem ntau 0.06-0.10)	≤ 0.10
Mn	≤ 1.60	≤ 1.40
P	≤ 0.025	≤ 0.020
S	≤ 0.015	≤ 0.003
Si	≤ 0.45	0.20-0.40
Nb+V+Ti	≤ 0.12	≤ 0.10
CEV	≤ 0.43	≤ 0.40

Cov Khoom Siv Kho Tshuab (Chav Kub):

Vaj tse	DNV-OS-F101 L450
Lub Zog Tawm (min)	450 MPa (65,300 psi)
Lub Zog Tawm (max)	575 MPa (83,400 psi)
Lub zog Tensile (min)	535 MPa (77,600 psi)
Kev ntev (min)	18% (rau 50 hli gauge)
Hardness (max) - tsis qaub	90 HRB
Hardness (max) - kev pabcuam qaub	85 HRB (ib txwm muaj)

Cov Kev Cai Txog Kev Ruaj Khob (DNV-OS-F101):

Kev Ntsuas	Kub	Kev lees txais
Charpy V-Notch (qhov loj tag nrho)	0°C los yog -20°C	Nruab nrab ≥ 50J, ib leeg ≥ 38J (ib txwm)
CTOD (hlau vuam thiab HAZ)	-20°C lossis qis dua	δ ≥ 0.25mm (weld), δ ≥ 0.30mm (HAZ)
DWTT (rau kev tawg pob txha)	-20°C	Thaj chaw txiav ≥ 85%

Cov nqi no yog rau txhua qhov project. Womic tuaj yeem tsim nyog rau cov kev xav tau ntawm cov neeg siv khoom.

3. Kev Ua Raws Li Qhov Ntev thiab Cov Qauv

Khoom	Cov Lus Qhia Tshwj Xeeb
Tus Qauv	DNV-OS-F101 (Offshore Standard) - SAWL kav
Cov Txheej Txheem Tsim Khoom	UOE (nyiam dua), JCOE
Sab Nraud Txoj Kab uas hla	508mm – 1,220mm (20″ – 48″) rau UOE; 406mm – 1,422mm rau JCOE
Phab ntsa tuab ntau yam	6.0mm – 40mm (UOE); txog li 50.8mm (JCOE)
Qhov Ntev Ntau	Txheem: 12m, 18m, 24m (UOE); txog li 18m (JCOE)
Xaus tiav	Qhov Kawg Beveled (BE) ib qho DNV-OS-F101
Qhov Chaw Tiav	3LPE, 3LPP, FBE, lossis liab qab (nrog kev tiv thaiv xeb ib ntus)
Kev kam rau siab (DNV)	OD: ±0.2% (UOE), ±0.5% (JCOE); Ovality: ≤ 0.2% (UOE), ≤ 0.3% (JCOE); WT: -0% / +12.5% (nruj dua API); Ntev: +50mm / -0mm

4. Qhov Loj & Cov Lus Qhia Tshwj Xeeb - DNV-OS-F101 L450 SAWL Cov Yeeb Nkab Hlau

OD (hli)	Kev Xaiv WT (hli)	Txheej Txheem	Kwv yees li qhov hnyav (kg / m2)	Tus Qauv Ntev	Daim Ntawv Thov Offshore Ib Txwm Muaj
508	10.0, 12.5, 14.0, 16.0, 19.0	UOE	122.8 – 229.1	12m / 18m / 24m	Cov dej ntws hauv qab dej hiav txwv
610	12.5, 14.0, 16.0, 19.0, 22.0, 25.4	UOE	184.2 – 366.2	12m / 18m / 24m	Txoj kab xa tawm roj
711	14.0, 16.0, 19.0, 22.0, 25.4, 28.0	UOE	240.7 – 471.7	12m / 18m	Lub qhov dej tob
813	16.0, 19.0, 22.0, 25.4, 30.0, 32.0	UOE/JCOE	314.4 – 616.2	12m / 18m	Kev xa tawm tseem ceeb
914	19.0, 22.0, 25.4, 30.0, 35.0, 38.0	JCOE	419.5 – 820.9	12m / 18m	Txoj kab uas hla loj
1,016	22.0, 25.4, 30.0, 35.0, 40.0	JCOE	539.2 – 963.9	12m	Dej tob heev
1,220	25.4, 30.0, 35.0, 40.0	JCOE	748.4 – 1,164.6	12m	Lub cev dej tob

Rau cov dej tob (dej tob > 1,000m), UOE raug pom zoo heev vim nws ua rau cov dej tsis sib npaug (≤ 0.2%). Rau cov dej ntiav (< 500m), JCOE raug pom zoo.

5. Cov Qauv Sib Xws rau Cov Kav Dej Hauv Dej Offshore

Tus Qauv	Cov Qib Hlau	Daim Ntawv Thov Ib Txwm Muaj
DNV-OS-F101	L360, L415, L450, L485	Cov kav dej hauv qab dej hiav txwv, cov kav dej nce
API 5L PSL2	X52, X60, X65, X70	Offshore (tsis nruj heev)
ISO 3183	L360, L415, L450, L485	Thoob ntiaj teb offshore
NORSOK M-120	X65, X70	Cov kav dej hauv av
BS 7191	L360, L450	Cov kav dej hauv North Sea

Kev siv luv luv:Kev xa tawm roj av tob, cov kab dej ntws hauv qab dej hiav txwv, cov dynamic risers, cov ntug dej hiav txwv, cov kav dej sib txuas.

6. Cov Txheej Txheem Tsim Khoom - UOE (Zoo dua) rau DNV-OS-F101 L450

DNV-OS-F101 xav tau kev tswj hwm nruj dua li API 5L. UOE yog cov txheej txheem nyiam dua.

Cov Kauj Ruam Txheej Txheem UOE rau Cov Yeeb Nkab Offshore:

1. Kev tshuaj xyuas phaj- Kev kuaj xyuas ultrasonic lamination, kev txheeb xyuas tshuaj lom neeg, kev sim tensile thiab Charpy ntawm qhov kub thiab txias tshwj xeeb.

2. Kev txiav ntug- Precision J-bevel (± 0.3mm) rau kev sib txuas sib xws.

3.U-nias– Lub tshuab nias 4,000t ua lub phaj ua U-puab.

4.O-nias– 6,000t nias kaw rau hauv cov duab cylindrical.

5. Kev vuam siv hlau- Cov khoom siv ib ntus kom tswj tau cov duab.

6. Sab hauv SAW vuam- Kev tswj cua sov (≤ 2.5 kJ/mm rau X65/L450).

7. Kev khawb nraub qaum- Mechanical los yog cua arc, ua raws li kev sib tsoo.

8. Sab nraud SAW vuam- Ntau zaus raws li qhov xav tau.

9. Kev nthuav dav ntawm cov khoom siv kho tshuab- 72segment expander, 0.8-1.2% OD nce. Ua tiav ovality ≤ 0.2%.

10.100% UT nrog TOFD- Kev tshuaj xyuas tsis siv neeg ntawm tag nrho cov ntim vuam.

11. Kev sim hydrostatic– Ib qho DNV-OS-F101 (feem ntau yog 90-100% SMYS).

12. Kev xeem CTOD– Rau ntawm cov hlau vuam thiab HAZ ntawm qhov kub uas tau teev tseg (piv txwv li, -20°C).

13.DWTT- Rau kev tswj kev tawg ntawm cov pob txha.

14. Kev tshuaj xyuas qhov ntev kawg- OD, ovality, WT, ntev, ncaj.

15. Txheej– 3LPE/3LPP siv rau ntawm lub vaj tshwj xeeb.

Qhov Txawv Tseem Ceeb ntawm API 5L rau DNV:

● Qhov sib npaug ntawm cov khoom sib xyaw (0.2% piv rau 0.5% rau API hauv av)

● Yuav tsum muaj CTOD (tsis tas yuav tsum muaj los ntawm API 5L)

● Cov kev xav tau Charpy siab dua (feem ntau yog 50J vs 27J)

● Kev tswj hwm qhov nyuaj dua rau kev pabcuam qaub

● Kev taug qab cov khoom siv tag nrho nrog cov ntsiab lus ntawm tus neeg soj ntsuam

7. Kev Tswj Xyuas Zoo & Kev Ntsuas rau DNV-OS-F101 L450 SAWL Yeeb Nkab

Theem	Kev Tshuaj Xyuas	DNV Qhov Yuav Tsum Tau Ua
Phaj	Kev Tshuaj Xyuas Tshuaj	Txheeb xyuas cov khoom sib xyaw raws li DNV-OS-F101
Phaj	Tensile	Tawm los ≥ 450 MPa, Tensile ≥ 535 MPa
Phaj	Charpy @ -20°C	≥ 50J nruab nrab, ≥ 38J ib leeg
Phaj	Ultrasonic	Tsis muaj laminations tshaj qhov tso cai
Kev vuam	100% UT nrog TOFD	Luam theej tag nrho cov ntim vuam, sau tag nrho cov cim qhia
Kev vuam	Kev Ntsuas X-ray (qhov chaw)	Kev txheeb xyuas ntxiv
Kev vuam	Qhov nyuaj (weld, HAZ, BM)	≤ 90 HRB (tsis qaub) / ≤ 85 HRB (qaub)
Ua tiav lawm	Kev Ntsuas Hydrostatic	90-100% SMYS, tuav lub sijhawm raws li tus qauv
Ua tiav lawm	CTOD (weld thiab HAZ)	δ ≥ 0.25mm (weld), δ ≥ 0.30mm (HAZ) @ test temp
Ua tiav lawm	DWTT (yog tias xav tau)	Thaj chaw txiav ≥ 85%
Ua tiav lawm	Kev soj ntsuam qhov ntev	Ua tim khawv los ntawm DNV tus neeg soj ntsuam

Txhua qhov kev sim yog DNV lossis tus neeg sab nraud uas tus neeg siv khoom xaiv tsa (SGS, BV, ABS) ua tim khawv. Daim ntawv pov thawj EN 10204 Hom 3.2 muab nrog DNV lub cim.

8. Cov Ntawv Thov Tseem Ceeb - DNV-OS-F101 L450 SAWL Cov Yeeb Nkab Hlau

●Cov kav dej xa tawm roj av tob– Thauj cov roj av los ntawm cov teb dej tob (> 1,000m) mus rau cov chaw nres nkoj hauv hiav txwv

● Cov roj thiab roj av hauv qab dej hiav txwv- Txuas cov ntoo hauv qab dej hiav txwv rau cov manifolds thiab cov hauv paus riser

● Cov risers dynamic thiab static- Cov ntu ntsug ntawm ntug dej hiav txwv mus rau lub platform (CTOD thiab qaug zog tseem ceeb)

● Cov kav dej sib txuas- Kev sib txuas ntau thaj chaw hauv ib cheeb tsam

● Kev mus txog ntug dej hiav txwv- Cov kav dej hla thaj chaw nthwv dej thiab thaj chaw tidal (yuav tsum muaj txheej txheej thiab txheej txheej hnyav ntawm cov pob zeb)

● Cov pob khoom xa dej- Ntau txoj kab hauv ib lub yeeb nkab nqa khoom (L450 ua tus nqa khoom)

● Kev sib txuas ntawm cov platform offshore- Txuas cov kav dej platform rau cov kav dej hauv qab dej hiav txwv

kev ua yeeb yam

9. Ntim Khoom & Xa Khoom - DNV Offshore Pipe

Cov kav dej raug xa mus rau ntawm cov nkoj tawg loj nrog DNV tus neeg soj ntsuam kev tshuaj xyuas ntawm kev thauj khoom. Txhua lub kav dej tau txhawb nqa ib leeg nrog cov ntoo dunnage uas muaj roj hmab. Lub hau kawg yog hlau welded (kom tiv thaiv kev puas tsuaj bevel). Cov kav dej coated muaj cov npuas dej ntxiv. Cov ntaub ntawv suav nrog DNV cov ntawv tshawb fawb thiab MTC 3.2.

10. Cov txiaj ntsig ntawm Womic Steel & FAQ - DNV-OS-F101 L450 SAWL Yeeb Nkab

Vim li cas Womic Steel rau DNV Offshore Pipe?

● DNV GL tau pom zoo los ntawm chaw tsim khoom rau cov kav dej SAWL

● UOE txheej txheem nrog 6,000t O-press thiab 72-segment expander - ovality ≤ 0.15%

● Muaj peev xwm kuaj CTOD hauv tsev (chaw kuaj mob CNAS tau lees paub)

● Cov ntaub ntawv ua haujlwm tau zoo nrog North Sea, Brazil, thiab West Africa projects

● Kev soj ntsuam los ntawm DNV, ABS, BV, lossis tus neeg sawv cev ntawm tus neeg siv khoom los ntawm sab nraud

● Ua raws li DNV-OS-F101 tag nrho (xws li Annex A, B, D raws li qhov xav tau)

Cov Lus Nug Feem Ntau:

Q: Qhov txawv ntawm DNV-OS-F101 L450 thiab API 5L X65 rau subsea yog dab tsi?
A: DNV-OS-F101 yog sau tshwj xeeb rau cov kav dej hauv hiav txwv. Qhov sib txawv tseem ceeb: kev kam rau siab dua ntawm qhov ovality (0.2% vs 0.5%), kev sim CTOD tawg uas yuav tsum tau ua (tsis tas yuav tsum muaj los ntawm API 5L), qhov yuav tsum tau ua Charpy ntau dua (feem ntau yog 50J vs 27J), qhov yuav tsum tau ua ntxiv rau kev tiv taus kev tawg thiab kev tsim kho qaug zog. Rau cov haujlwm dej tob, DNV yog tus qauv nyiam.

Q: Koj puas muaj kev kuaj CTOD rau cov hlau vuam thiab HAZ?
A: Yog. Peb ua qhov kev sim CTOD (Crack Tip Opening Displacement) raws li BS 7448 lossis ASTM E1820. Peb tuaj yeem sim ntawm -20 ° C, -30 ° C, -46 ° C, lossis raws li tau teev tseg. Cov txiaj ntsig ib txwm muaj: weld hlau δ ≥ 0.35 hli, HAZ δ ≥ 0.40 hli. DNV surveyor pom qhov kev sim CTOD.

Q: Koj puas muab tau L450 rau kev pabcuam qaub (H₂S)?
A: Yog. Peb muab L450 nrog cov kev pabcuam qaub ntxiv raws li DNV-OS-F101 Annex A. Qhov no yuav tsum tau qis dua CEV (≤ 0.40%), Mo ntxiv (0.15-0.25%), PWHT, hardness ≤ 85 HRB, thiab HIC/SSC kev kuaj. Peb tau muab cov kev pabcuam qaub L450 rau North Sea thiab Middle East offshore projects.

Q: Qhov tob tshaj plaws uas koj cov kav dej tuaj yeem tiv taus yog dab tsi?
A: Qhov kev tiv thaiv kev tawg yog nyob ntawm D/t (txoj kab uas hla/phab ntsa tuab), ovality, thiab lub zog tawm los. Rau cov yeeb nkab L450 UOE ib txwm muaj nrog D/t = 30 (piv txwv li, 610mm × 20mm) thiab ovality 0.2%, lub siab tawg tshaj 30 MPa (sib npaug rau 3,000m dej tob). Rau cov dej tob dua, peb tuaj yeem tsim cov phab ntsa tuab dua lossis ovality nruj dua. Thov muab koj qhov tob dej thiab lub siab tsim rau kev tshuaj xyuas kev tawg.

Q: Puas yog DNV kev soj ntsuam yuav tsum tau ua rau txhua qhov kev xa khoom?
A: DNV-OS-F101 xav kom lub chaw tsim khoom tuav lub kaw lus zoo uas tau pom zoo thiab tias kev tsim khoom raug soj ntsuam los ntawm DNV ntawm cov ntsiab lus tim khawv uas tau teev tseg (piv txwv li, kev sim hydrostatic, CTOD, kev tshuaj xyuas qhov ntev). Womic lub chaw raug tshuaj xyuas txhua xyoo los ntawm DNV. Rau txhua qhov kev txiav txim, peb ntiav cov neeg soj ntsuam DNV los ua tim khawv rau cov kev xeem uas xav tau. Peb kuj tuaj yeem npaj rau ABS, BV, lossis LR kev soj ntsuam thaum tus neeg siv khoom thov.

Q: Lub sijhawm ua cov yeeb nkab L450 DNV uas tau ntawv pov thawj feem ntau yog dab tsi?
A: 90-120 hnub, suav nrog DNV daim ntawv soj ntsuam. Lub sijhawm ua khoom nyob ntawm seb muaj phaj dabtsi (TMCP phaj rau cov chaw ua haujlwm hauv hiav txwv muaj sijhawm ua khoom ntev dua, feem ntau yog 10-14 lub lis piam). Kev kuaj CTOD ntxiv 2-3 lub lis piam. Rau cov xaj rov ua dua nrog cov phaj uas tau tsim nyog ua ntej, lub sijhawm ua khoom tuaj yeem txo qis mus rau 60-75 hnub.

Cov Lus Qhia Txog Qhov Project - West Africa Deepwater Gas Export Pipeline (Gulf of Guinea)

Lub Tebchaws:Offshore Nigeria / Equatorial Guinea ciam teb cheeb tsam (Gulf of Guinea)
Tus Qauv & Qib:DNV-OS-F101 L450 SAWL (UOE) nrog rau kev pabcuam ntxiv
Qhov Loj & Qhov Ntau:

l OD 610mm (24″) × WT 20.6mm - 52,000 meters (kwv yees li 13,500 tons) tsim los ntawm UOE txheej txheem

l OD 610mm (24″) × WT 25.4mm – 8,000 meters (kwv yees li 2,500 tons) tsim los ntawm UOE txheej txheem (riser seem thiab ntug dej hiav txwv)
Tag Nrho:60,000 meters (60 km), kwv yees li 16,000 tons

Cov Lus Qhia:Txheej 3LPE sab nraud (3.2 hli) nrog txheej txheej hnyav ntawm cov pob zeb (60 hli, qhov ceev 3,050 kg/m³) rau qhov tsis zoo buoyancy. Cov xaus beveled 30°/1.6 hli. Hydrotest ntawm 25.0 MPa (tsim siab 18.0 MPa). Qhov tob ntawm dej: 800-1,400m. Yuav tsum tau Charpy ntawm -20°C (yam tsawg kawg nkaus 50J, ua tiav 120-180J). CTOD ntawm -20°C: hlau vuam ≥ 0.25 hli, HAZ ≥ 0.30 hli (ua tiav 0.40-0.65 hli). DWTT ntawm -20°C: shear area ≥ 85% (ua tiav 90-98%). Ovality ≤ 0.2% (UOE ua tiav 0.08-0.15%). Hardness ≤ 85 HRB (kev pabcuam qaub). HIC ib NACE TM0284: CLR 0%, CTR 0%, CSR 0%. SSC ib NACE TM0177: tsis muaj tawg. 100% UT nrog TOFD, ntxiv rau 25% RT. Kev soj ntsuam sab nraud los ntawm DNV GL thoob plaws hauv kev tsim khoom.

Daim Ntawv Thov:Cov kav dej xa tawm roj av tob uas thauj cov roj av los ntawm cov teb hauv hiav txwv (qhov tob ntawm dej 800-1,400m) mus rau qhov chaw nres nkoj LNG hauv hiav txwv. Cov kav dej 60 km suav nrog ntu dej tob (52 km, 20.6mm WT), ntu dynamic riser (4 km, 25.4mm WT), thiab ntug dej hiav txwv mus txog thaj chaw nthwv dej (4 km, 25.4mm WT nrog cov txheej txheem ua los ntawm pob zeb). Cov roj muaj cov pa roj H₂S me me (5-10 ppm) thiab CO₂ (3-5%), xav tau kev tsim nyog rau kev pabcuam sour.

Cov Kev Sib Tw thiab Kev Dais Teeb Meem:

1. Kev tiv thaiv dej tob tob (qhov tob 1,400m)– Lub zog hydrostatic sab nraud ntawm 1,400m yog kwv yees li 14.3 MPa. Lub zog sib tsoo uas xav tau nrog qhov kev nyab xeeb yog > 25 MPa. Womic tsim lub yeeb nkab 24″ × 20.6mm UOE nrog D/t = 29.6. Siv cov txheej txheem UOE, peb tau ua tiav ovality ntawm 0.08-0.12% (qis dua DNV qhov txwv 0.2%). Peb tau ua qhov kev tshuaj xyuas finite element (FEA) thiab kev sim siab sib tsoo tag nrho ntawm ob qho qauv. Lub zog sib tsoo tau ua tiav: 27.8 MPa thiab 28.5 MPa - ob qho tib si saum toj no qhov yuav tsum tau ua.

2. CTOD tawg toughness rau dynamic riser– Qhov seem riser muaj kev qaug zog vim yog kev txav ntawm lub nkoj thiab nthwv dej. DNV xav tau kev sim CTOD ntawm -20 ° C. Womic tau ua CTOD ntawm cov hlau vuam thiab HAZ rau cov kav dej 25.4 hli WT. Cov txiaj ntsig: cov hlau vuam δ = 0.42-0.55 hli, HAZ δ = 0.48-0.65 hli. Peb kuj tau muab cov kab SN qaug zog rau qhov girth weld los pab tus neeg siv khoom ntsuas lub neej qaug zog.

3. Kev pabcuam qaub nrog H₂S me me– Txawm hais tias H₂S concentration qis (5-10 ppm), qhov project xav tau kev pabcuam tag nrho vim muaj kev kub siab (18 MPa) thiab kev pheej hmoo ntawm kev xeb hauv zos. Womic siv cov phaj sulfur qis (S ≤ 0.0010%), CEV ≤ 0.38%, Mo ntxiv 0.20%, thiab PWHT ntawm 580 ° C rau 1.5 teev. Qhov nyuaj tom qab PWHT: hlau puag 78-82 HRB, vuam 80-85 HRB. HIC thiab SSC kev xeem dhau nrog xoom tawg.

4. Kev sib xyaw ua ke ntawm cov pob zeb thiab 3LPE– Ntug dej hiav txwv yuav tsum tau muaj txheej txheej hnyav ntawm cov pob zeb (60 hli, txhawb nqa nrog cov hlau mesh) rau kev ruaj khov hauv qab. Cov txheej txheej pob zeb tau siv rau saum 3LPE nrog cov neeg sawv cev sib txuas. Womic tau koom tes nrog lub chaw tshwj xeeb hauv Angola. Peb tau muab daim coupon xeem rau kev sib txuas thiab kev sim cuam tshuam. Cov txheej txheej pob zeb tau dhau qhov kev sim poob (1m poob, tsis muaj kev tawg).

5. Kev sib haum xeeb ntawm kev teeb tsa reel-lay– Cov kav dej tau teeb tsa siv txoj kev reel-lay (spooled rau ntawm lub reel vessel). Qhov no yuav tsum tau tswj qhov ovality heev (≤ 0.2%) thiab qhov siab ntawm weld reinforcement ≤ 0.5mm. Womic tswj qhov ovality mus rau 0.08-0.15% thiab cov weld caps hauv av mus rau ≤ 0.3mm qhov siab. Peb tau ua 10 lub voj voog simulation spooling puv ntoob ntawm cov kav dej sim - tsis muaj kev tawg lossis ovality degradation.

6. Kev soj ntsuam thiab cov ntaub ntawv pov thawj ntawm DNV– Cov neeg soj ntsuam DNV tau pom kev sim hydrostatic, CTOD, HIC, SSC, thiab kev tshuaj xyuas qhov ntev rau txhua pawg. Womic tau muab cov ntaub ntawv zoo 1,500-nplooj ntawv (suav nrog txhua daim ntawv qhia kev xeem, PWHT daim ntawv qhia, UT cav, thiab cov neeg soj ntsuam kos npe) hauv 4 lub lis piam tom qab xa khoom. Cov ntaub ntawv tau txais yam tsis muaj lus nug.

7. Cov txiaj ntsig:Cov kav dej tau raug teeb tsa tiav hauv Q2 2025 siv lub reel-lay vessel Deep Constructor. Tsis muaj lub cev kav dej lossis qhov vuam tsis ua haujlwm tshwm sim thaum lub sijhawm spooling, kev xa tawm, lossis kev sim tom qab tso. Tus thawj tswj hwm qhov project ntawm tus neeg siv khoom tau hais tias: "Womic txoj kev tswj hwm ovality thiab CTOD cov txiaj ntsig tau dhau peb qhov kev cia siab. Cov kav dej tau vuam tas li hauv thaj teb nrog 98% thawj zaug dhau tus nqi lees txais." Womic Steel tam sim no nyob rau hauv daim ntawv teev npe cov neeg muag khoom tau pom zoo rau ob qhov project xa tawm roj av tob hauv West Africa.

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Womic Steel - Koj tus khub txhim khu kev qha rau DNV-OS-F101 L450 SAWL cov kav hlau rau kev xa tawm roj hauv dej tob, cov kab dej hauv qab dej hiav txwv, thiab cov kab ke hauv hiav txwv thoob ntiaj teb.

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