1. Tšepe ea Womic: Bokhoni ba Tlhahiso le Matla a Khamphani bakeng sa Tšebeletso ea Bolila ea X65
Womic Steel Group e tsamaisa mela e inehetseng ea tlhahiso bakeng sa lipeipi tsa LSAW tse nang le tšebeletso e matla ea bolila. Tšebeletso ea bolila ea X65 e batla ho feta X52 ka lebaka la matla a phahameng le litlhoko tse thata tsa ho tiea. Litaolo tsa bohlokoa li kenyelletsa:
● Tekanyo e tlase ea khabone (CEV ≤ 0.40%, e tloaelehileng ≤ 0.38%)
● Sebabole se tlase haholo (S ≤ 0.0015%) le phosphorus e tlase (P ≤ 0.015%)
● Kalafo ea calcium bakeng sa taolo ea sebopeho sa ho kenyeletsoa (karolelano ea Ca/S ≥ 1.5)
● Lipoleiti tse pholileng ka potlako (TMCP) ho fihlela sebopeho sa microferrite se ka hare ho acicular
● Kalafo ea mocheso ka mor'a ho chesetsoa (PWHT) bakeng sa liphaephe tsohle, ho sa tsotelehe botenya ba lebota
● Teko ea boima ba 100% (ho tjheseletsa, HAZ, tšepe ea motheo) - sepheo ≤ 85 HRB
● Teko ea HIC le SSC ho latela maemo a NACE ntle le ho amoheloa ha mapetso bakeng sa merero e mengata
Mekhoa ea tlhahiso: JCOE, UOE (e khethoa ka lebaka la khatello e tlase e setseng), poleiti e phutholohileng, kaofela e na le PWHT e tlamang ka ontong ea koloi-tlase (bolelele ba 12m, 600°C ± 10°C). Tlhahlobo ea motho oa boraro ke SGS, BV, TÜV, DNV, ABS, kapa LR bakeng sa netefatso e felletseng ea tšebeletso e bolila.
Bokgoni ba selemo le selemo ba tšebeletso ea sour X65 LSAW:Lithane tse 25,000.
Ho tenyetseha ha Tlhahiso bakeng sa Tšebeletso ea Bolila ea X65:
● JCOE: 406–1,422mm OD × 6.0–50.8mm Boima × ≤ 18m
● UOE: 508–1,220mm OD × 6.0–40.0mm Boima × ≤ 24m (e kgethwa bakeng sa bolila ka lebaka la kgatello e tlase e setseng)
● Poleiti e phutholohileng: 600–1,600mm OD × 25–60mm Boima × ≤ 12m
● PWHT e kenngoa phaepheng e 'ngoe le e 'ngoe (e inele ka 600°C ± 10°C, e tšoare hora e le 'ngoe ka botenya ba 25mm, e pholise butle ≤ 200°C/hora)
2. Tšebeletso ea API 5L X65 PSL2 e Bolila: Sebopeho sa thepa le Litšobotsi tsa Ts'ebetso
Bakeng sa tšebeletso ea sour ea X65, k'hemistri e thata ho feta PSL2 e tloaelehileng 'me e boetse e thata ho feta sour ea X52. Sepheo ke ho fihlela matla a phahameng (tekanyo ea 450 MPa) ha ka nako e ts'oanang ho boloka khanyetso e ntle ea HIC le SSC.
Sebopeho sa Lik'hemik'hale (Tlhahlobo ea Ladle, lipheo tse tloaelehileng bakeng sa tšebeletso e bolila):
| Karolo | PSL2 e tloaelehileng ea max | Sepheo sa Tšebeletso ea Bolila sa X65 (Womic) |
| C | 0.12 | ≤ 0.08 (ka tloaelo 0.05-0.07) |
| Mn | 1.60 | ≤ 1.40 (e tloaelehileng 1.20-1.35) |
| P | 0.025 | ≤ 0.015 |
| S | 0.015 | ≤ 0.0015 (ka tloaelo 0.0010) |
| Si | 0.45 | 0.20-0.35 |
| V | 0.10 | ≤ 0.06 |
| Nb | 0.05 | 0.04-0.07 |
| Ti | 0.04 | ≤ 0.025 |
| Mo | Ha ea hlalosoa | ≤ 0.30 (bakeng sa bolila, hangata 0.15-0.25) |
| Ni | Ha ea hlalosoa | ≤ 0.50 (ha ho hlokahale bakeng sa mocheso o tlase) |
| CEV | ≤ 0.43 | ≤ 0.40 (e tloaelehileng ≤ 0.38) |
| Pcm | ≤ 0.25 | ≤ 0.22 |
Kalafo ea calcium (karolelano ea Ca/S ≥ 1.5) e netefatsa hore ho na le li-inclusions tsa globular sulfide. Ho eketsoa ha molybdenum ho ntlafatsa khanyetso ho SSC maemong a matla a holimo.
Thepa ea Mekaniki (Kamora PWHT):
| Thepa | Tšebeletso ea Bolila ea X65 PSL2 (Womic) |
| Matla a Tekanyo (metsotso) | 450 MPa (65,300 psi) |
| Matla a Tekanyo (max) | 570 MPa (82,700 psi) |
| Matla a ho Tenyetseha (metsotso) | 535 MPa (77,600 psi) |
| Ho lelefatsa (metsotso) | 19% |
| Bothata (boholo)-merero e mengata | 85 HRB (Womic o fihlella 78-85 HRB) |
| Matla a Tšusumetso @ -20°C (ha ho hlokahale) | ≥ 27 J (ka tloaelo 80-150 J) |
| Matla a Tšusumetso @ -46°C (ha ho hlokahale) | ≥ 27 J (ka tloaelo 60-100 J) |
Teko e Tlamang bakeng sa Tšebeletso ea Bolila ea X65:
● HIC ka NACE TM0284 (Tharollo A, lihora tse 96)-Kamohelo: CLR ≤ 5%, CTR ≤ 1.5%, CSR ≤ 0.5% (merero e mengata e hloka 0%)
● SSC ho latela NACE TM0177 (Mokhoa A, 720h, 90% SMYS)-ha ho petsohe
● Ho thatafala ho feta ho weld, HAZ, le tšepe ea motheo (max 85 HRB)
● Charpy V-Notch ho 0°C kapa ka tlase (hangata 27 J min)
● DWTT (bakeng sa taolo ea ho robeha ha lehe, haeba ho boletsoe)
3. Ho Latela Maemo le Litekanyetso tsa Tekanyo
| Ntho | Tlhaloso |
| E tloaelehileng | API 5L PSL2 e nang le tlatsetso ea tšebeletso e bolila |
| NACE | NACE MR0175 / ISO 15156 (khatiso ea morao-rao) |
| Mekhoa ea Tlhahiso | JCOE, UOE, poleiti e phuthiloeng (kaofela e na le PWHT) |
| Sebaka sa Bophara ba Kantle | 219mm-1,600mm (8″)-63″) |
| Botenya ba Lebota | 6.0mm-60mm (JCOE/UOE max 50.8mm, poleiti e phutholohileng max 60mm) |
| Bolelele ba Nako | 6m -Tekanyetso ea 18m; ho fihlela ho 24m (UOE) |
| Qetello ea ho Qetela | Qetello e Beveled (BE) ka API 5L |
| Qetello ea Bokaholimo | Bare, 3LPE, 3LPP, FBE (likoahelo li lokela ho ba bolila bakeng sa tšebeletso e tšoanelehang) |
| Mamello | OD: ± 0.5%; Boima: -0% / +15%; Bolelele: +50mm / -0mm |
4. Litekanyo le Litlhaloso tse Fumanehang - API 5L X65 PSL2 Tšebeletso e Bolila Pipe ea Tšepe ea LSAW
| OD (mm) | Dikgetho tsa WT (mm) | Tshebetso | Boima bo ka bang teng (kg/m2) | Bolelele bo Tloaelehileng | Litšobotsi tsa Tšebeletso e Bolila |
| 219 | 6.4, 8.0, 10.0, 12.5 | JCOE | 33.6-63.6 | 12m | PWHT, HIC e hlahlobiloe |
| 273 | 8.0, 10.0, 12.5, 14.0, 16.0 | JCOE | 52.3-101.5 | 12m / 18m | Bothata ≤ 85 HRB |
| 324 | 10.0, 12.5, 14.0, 16.0, 19.0 | JCOE | 77.4-142.8 | 12m / 18m | CEV ≤ 0.40, Mo e ekelitsoe |
| 406 | 10.0, 12.5, 14.0, 16.0, 19.0, 22.0 | JCOE/UOE | 97.7-208.4 | 12m / 18m | SSC e lekoa |
| 508 | 12.5, 14.0, 16.0, 19.0, 22.0, 25.4 | UOE | 152.7-302.3 | 12m / 18m / 24m | Tsela e felletseng ea ho tsamaea ka thata |
| 610 | 14.0, 16.0, 19.0, 22.0, 25.4, 28.0 | UOE | 205.8-401.8 | 12m / 18m / 24m | HIC CLR 0% e tloaelehileng |
| 711 | 16.0, 19.0, 22.0, 25.4, 28.0, 31.8 | UOE/JCOE | 274.3-532.9 | 12m / 18m | Tlamo ea PWHT |
| 813 | 19.0, 22.0, 25.4, 30.0, 32.0, 35.0 | JCOE | 372.1-671.4 | 12m / 18m | NACE MR0175 |
| 914 | 22.0, 25.4, 30.0, 35.0, 38.0, 40.0 | JCOE/E phutholohileng | 484.3-862.0 | 12m | S e Tlase (≤ 0.0015%) |
| 1,016 | 25.4, 30.0, 35.0, 40.0, 45.0, 50.0 | E phutholohile | 619.9-1,191.7 | 12m | Kalafo ea Ca, Mo ho fihlela ho 0.25% |
| 1,220 | 30.0, 35.0, 40.0, 45.0, 50.0, 55.0 | E phutholohile | 880.9-1,577.8 | 12m | Metsi a tebileng a bolila |
Liphaephe tsohle tsa tšebeletso ea sour tsa X65 li fumana PWHT ho sa tsotelehe botenya ba lebota. UOE e khethoa bakeng sa bophara ba ≤ 1,220mm ka lebaka la taolo e phahameng ea khatello e setseng.
5. Maemo a Tloaelehileng bakeng sa Phaephe ea Mohala oa Tšebeletso e Bolila e Matla a Phahameng
| E tloaelehileng | Kopo | Litlhoko tsa Teko |
| API 5L PSL2 + Annex H | Phaephe ea mohala oa tšebeletso e bolila | HIC, SSC, boima ≤ 90 HRB |
| NACE MR0175 / ISO 15156 | Lisebelisoa tsa tikoloho ea H₂S | Meeli holim'a ho thatafala, k'hemistri |
| NACE TM0284 | Mokhoa oa teko ea HIC | CLR, CTR, CSR |
| NACE TM0177 | Mokhoa oa teko ea SSC (Mokhoa oa A, B, C, D) | Ha ho petsohe |
| DNV-OS-F101 (tlatsetso e bolila) | Liphaephe tsa bolila tsa leoatleng | CTOD e eketsehileng le mokhathala |
| Khetla DEP 31.40.30.31 | Tšebeletso ea metsi a tebileng a bolila | Ho thatafala ho hoholo (≤ 85 HRB) |
Kakaretso ea tšebeliso:Methapo ea likutu tsa khase e bolila e nang le khatello e phahameng, liphaephe tsa oli e bolila e nang le metsi a tebileng, tšebeletso ea asiti e lebōpong la leoatle, fektheri ea ho hloekisa metsi a bolila, li-amine units, ente ea khase ea asiti, CCS e nang le H₂S.
6. Ts'ebetso ea Tlhahiso - LSAW bakeng sa Tšebeletso ea Sour ea X65 PSL2
Tšebeletso ea X65 sour e hloka lipoleiti tse tsoetseng pele tsa TMCP le taolo e thata haholo ea ts'ebetso.
Khetho ea Poleiti:
● Khabone e tlase (≤ 0.08%), manganese e tlase (≤ 1.40%), sebabole se tlase haholo (≤ 0.0015%)
● Khalsiamo e phekotsoeng (Ca/S ≥ 1.5)
● Ho eketsa Mo (0.15-0.25%) bakeng sa khanyetso ea SSC
● TMCP e nang le pholiso e potlakileng-sebopeho se senyenyane sa ferrite sa acicular
Mehato e Ikhethang ea ho Theha JCOE / UOE + Bolila:
●Ho sila ka bohale -Ho nepahala ± 0.5mm, bevel ea J bakeng sa ho kenella hantle ha weld.
●Ho theha -Ho khethoa UOE (khatello e tlase e setseng). JCOE e amoheleha bakeng sa lebopong.
●Ho tjheseletsa ka SAW -Mocheso o kenang ≤ 2.2 kJ/mm (o ka tlase ho o tloaelehileng). Mocheso wa diphaseje tse pedi ≤ 150°C.
●100% UT ka TOFD -E bonolo ho feta UT e tloaelehileng.
●Kalafo ea Mocheso Kamora ho Welded (PWHT) -Hoa hlokahala bakeng sa ts'ebeletso eohle e bolila X65. Kolobisa ho 580-600°C (mocheso o tlase ho feta X52 ho qoba tahlehelo ea matla). Tšoara hora e le 'ngoe ka botenya ba 25mm. Setofo se pholise ho ≤ 150°C ka hora.
●Katoloso ea mechini (UOE) -E lekanyelitsoe ho 0.5-0.8% (ha e bapisoa le 1.5% bakeng sa maemo a tloaelehileng) ho qoba ho thatafala ha mosebetsi o batang.
●Teko ea ho thatafala -Methati e meraro e felletseng ka phaephe (tšepe ea motheo, HAZ, mohala o bohareng oa weld). Boholo ba 85 HRB.
●Teko ea HIC -Ho ya ka NACE TM0284 Tharollo A, dihora tse 96. Disampole tse tswang dipheletsong tsa diphaephe.
●Teko ea SSC -Ho ya ka NACE TM0177 Mokhoa A, 720h ho 90% SMYS.
Liparamente tsa Sebōpi sa PWHT bakeng sa X65 Sour:
● Mocheso: 590°C ± 10°C (e ka tlase ho X52 ho boloka matla)
● Nako ea ho kolobisa: hora e le 'ngoe ka 25mm (bonyane hora e le 'ngoe)
● Sekhahla sa ho pholisa: ≤ 150°C ka hora ho tloha ho 590°C ho isa ho 300°C
● Li-thermocouple tse ngata holim'a phaephe
7. Taolo le Teko ea Boleng bakeng sa X65 Sour Service LSAW
| Sethaleng | Tlhahlobo | Mekhoa ea ho Amohela |
| Poleiti | Khemikhale (OES) | C ≤ 0.08, S ≤ 0.0015%, CEV ≤ 0.38, Mo 0.15-0.25% |
| Poleiti | Ultrasonic (lamination) | Ha ho li-lamination tse fetang 3mm |
| Poleiti | Tensile + Charpy ho -20°C | Tlhahiso ≥ 450 MPa, CVN ≥ 50J |
| Ho tjheseletsa | 100% UT ka TOFD | Ha ho na matšoao > 1.6mm |
| Ho tjheseletsa | RT (bonyane ba 10%) | Ha ho mapetso, ho hloka ho kopana |
| Kamora PWHT | Boima (HRB)-BM, Weld, HAZ | ≤ 85 HRB (sebaka ka seng) |
| E felile | HIC (NACE TM0284) | CLR ≤ 2% (hangata 0%), CTR ≤ 1%, CSR ≤ 0.5% |
| E felile | SSC (NACE TM0177 Mokhoa oa A, 720h) | Ha ho petsohe |
| E felile | Charpy ho -20°C kapa ka tlase ho moo | ≥ 27 J (min), e tloaelehileng 80-150 J |
| E felile | Thapo | Tlhahiso 450-570 MPa, Tensile ≥ 535 MPa |
| E felile | Teko ea Hydrostatic | 90-100% SMYS |
Sephutheloana sa litokomane se kenyelletsa: MTC Type 3.2, lichate tsa PWHT, limmapa tsa thatafalo, litlaleho tsa HIC le SSC, li-log tsa UT/TOFD, litifikeiti tsa tlhahlobo ea metsi.
8. Likopo tsa mantlha - API 5L X65 PSL2 Tšebeletso e Bolila ea LSAW Steel Pipe
●Methapo ea likutu tsa khase ea tlhaho e bolila e nang le khatello e phahameng -Phetiso ea sebaka se selelele ho 10-15 MPa ka H₂S ho fihlela ho 50 ppm
● Liphaephe tsa oli e bolila tse tsoang metsing a tebileng a leoatleng -Methapo ea metsing a ka tlas'a lefatše libakeng tsa H₂S (teko ea UOE + CTOD)
● Methapo ea oli e tala e bolila -Mehala e nang le khatello e phahameng ho tloha lithabeng tsa liliba ho ea litsing tse bohareng
● Methapo ea metsi a bolila ea fektheri ea ho hloekisa -Ammonium bisulfide le tšebeletso ea H₂S (mocheso o phahameng)
● Liphaephe tsa yuniti ea phekolo ea amine -Amine e ruileng le e se nang mafura (H₂S le CO₂)
● Liliba tsa ho kenya khase ea asiti -Ho kenya hape metsoako ea H₂S/CO₂ libakeng tsa ho lahla
● Mehala ea ho phahamisa peterole -Ente ea khase e bolila bakeng sa ho phahamisa ka maiketsetso
● Liphaephe tsa CCS tse nang le litšila tsa H₂S -Ho hapa le ho boloka khabone moo molapo oa CO₂ o nang le H₂S
9. Pakete le Thomello - X65 Tšebeletso e Bolila Pipe ea LSAW
Ho tšoana le sephutheloana se tloaelehileng sa LSAW se nang le tšireletso e ntlafalitsoeng ea pheletso (likhahlo tsa tšepe e sa hloekang li khothaletsoa ho qoba tšilafalo). Litokomane li kenyelletsa faele e felletseng ea boleng ba tšebeletso e bolila ho phaella litokomaneng tse tloaelehileng tsa ho romella.
10. Melemo le Lipotso Tse Botsoang Khafetsa ka Tšepe ea Womic - X65 PSL2 Tšebeletso e Bolila LSAW
Hobaneng Womic Steel e le Tšebeletso ea X65 Sour?
● Sebōpi sa PWHT se inehetseng (bolelele ba 12m) se nang le taolo e nepahetseng ea mocheso (590°C ± 10°C)
● Teko ea ka hare ea HIC le SSC (laboratori e netefalitsoeng ke CNAS)
● Lipoleiti tse entsoeng ka mo-alloy bakeng sa khanyetso e phahameng ea SSC
● Ts'ebetso ea UOE bakeng sa khatello e tlase ea masala (e khethiloeng bakeng sa bolila ba metsi a tebileng)
● Motho oa boraro o bone liteko tsa bolila li fumaneha (SGS, BV, TÜV, DNV)
● Liphaephe tsa tšebeletso ea bolila tsa X65 tse fetang 300 km li fanoa lefatšeng ka bophara
Lipotso Tse Botsoang Khafetsa:
P: Phapang ke efe pakeng tsa tšebeletso ea X52 sour le X65 sour?
K: Tšebeletso ea bour ea X65 e batla ho le boima haholo. X65 e hloka matla a phahameng (450 vs 360 MPa) ha e ntse e boloka meeli e tšoanang kapa e thata ea ho thatafala (≤ 85 HRB). Sena se hloka ho eketsoa ha Mo (0.15-0.25%), taolo e thata ea CEV (≤ 0.38% vs ≤ 0.40%), 'me hangata mocheso oa PWHT o tlase (590°C vs 600°C) ho qoba tahlehelo ea matla. X65 hangata e hlalosoa bakeng sa liphaephe tsa khatello e phahameng (> 10 MPa) le lits'ebetso tsa metsi a tebileng lebopong.
P: Na PWHT e tlamehile bakeng sa liphaephe tsohle tsa tšebeletso ea sour tsa X65 ho sa tsotelehe botenya ba lebota?
A: E, ho ya ka NACE MR0175 le ditlhaloso tsohle tse kgolo tsa mosebedisi. Esita le bakeng sa diphaephe tsa 6.4mm WT, PWHT e a hlokahala ho fihlella boima ba ≤ 85 HRB le ho imolla kgatello e setseng. Womic e sebedisa PWHT ho diphaephe tsa X65 tse 100% tse nang le tshebeletso e bolila.
P: Mekhoa e tloaelehileng ea ho amohela HIC bakeng sa tšebeletso ea X65 sour ke efe?
A: NACE TM0284 e dumella CLR ≤ 5%, CTR ≤ 1.5%, CSR ≤ 0.5%. Leha ho le jwalo, merero e mengata ya metsi a tebileng le a boleng bo hodimo e hloka CLR = 0% (ha ho mapetso). Dipoleiti tsa sebabole tse tlase haholo tsa Womic (S ≤ 0.0015%) le kalafo ya calcium di fihlella CLR 0% ka ho tswela pele.
P: Na liphaephe tsa tšebeletso ea sour tsa X65 li ka sebelisoa libakeng tsa arctic kapa tse mocheso o tlase?
K: E, ka teko e eketsehileng ea Charpy ea mocheso o tlase. Womic e ka fana ka tšebeletso ea X65 sour ka teko ea tšusumetso ho -20°C, -40°C, kapa -46°C (metsotso ea 27J). Bakeng sa tšebeletso ea arctic sour, re boetse re fana ka DWTT (sebaka sa ≥ 85% sa ho kuta mochesong oa teko). Hlokomela hore mocheso o tlase le tšebeletso ea sour hammoho li hloka moralo o hlokolosi oa alloy (tlatsetso ea Ni, CEV e tlase). Ka kopo fana ka mocheso oa hau oa ts'ebetso le khatello e sa fellang ea H₂S bakeng sa tlhahlobo e loketseng.
P: Kgatelelo e phahameng ka ho fetisisa ya karolo ya H₂S bakeng sa tshebeletso ya sour ya X65 ke efe?
A: Ho ya ka NACE MR0175, X65 e loketse tshebeletso e bolila ho fihlela ho 0.3 psi (0.02 bar) kgatello e sa fellang ya H₂S. Bakeng sa kgatello e phahameng ya karolo (mohlala, 0.5-1.0 psi), ho hlokahala lengolo le eketsehileng (HIC e nang le pH e tlase, SSC kgatellong e phahameng). Womic e na le X65 e tshwanelehang bakeng sa kgatello e sa fellang ya H₂S ho fihlela ho 1.0 bar bakeng sa diporojeke tse itseng. Ka kopo arolelana maemo a hao a tshebetso.
P: Nako e tloaelehileng ea ho etella pele bakeng sa tšebeletso ea sour ea X65 LSAW ke efe?
A: Matsatsi a 80-120, ho latela ho fumaneha ha poleiti e alloyed Mo (nako ea pele ke libeke tse 8-12) le tlhahlobo ea HIC/SSC (libeke tse 4-6). Liodara tse potlakileng (matsatsi a 60-90) lia khoneha haeba lipoleiti li le teng. Teko ea batho ba bang e eketsa libeke tse 1-2.
P: Na le fana ka liteko tsa CTOD bakeng sa li-risers tsa sour tsa X65 tse tsoang mose ho maoatle?
K: E. Re etsa teko ea CTOD (Crack Tip Opening Displacement) ho latela BS 7448 kapa ASTM E1820 mochesong o boletsoeng (hangata -20°C kapa -46°C). Boleng bo tlase ba CTOD: tšepe e welded ≥ 0.25mm, HAZ ≥ 0.30mm. Re fane ka liphaephe tse bolila tsa X65 tse lekiloeng ke CTOD mererong ea metsi a tebileng Leoatleng le Leboea le Koung ea Mexico.
Tšupiso ea Morero-Phaephe ea Khase e Bolila ea Shelf Leboea Bophirima (Australia)
Naha:Australia (Australia Bophirima, Shelf Leboea Bophirima)
Maemo le Kereiti:API 5L X65 PSL2 e nang le tlatsetso ea tšebeletso e bolila ho latela NACE MR0175; litlhoko tse ling tsa CTOD le mocheso o tlase
Litekanyo le Bongata:
● OD 610mm (24″) × Boima ba 15.9mm-Limithara tse 45,000 (hoo e ka bang lithane tse 9,200) tse entsoeng ka ts'ebetso ea UOE
● OD 610mm (24″) × WT 19.0mm-Limithara tse 12,000 (hoo e ka bang lithane tse 2,800) tse entsoeng ka mokhoa oa UOE (lebota le teteaneng bakeng sa karolo e phahamisang)
● OD 813mm (32″) × Boima ba 22.2mm-Limithara tse 8,000 (hoo e ka bang lithane tse 3,100) tse entsoeng ka mokhoa oa JCOE (karolo ea lebopong)
Kakaretso:Limithara tse 65,000 (65 km), hoo e ka bang lithane tse 15,100
Litlhaloso:Seaparo sa kantle sa 3LPP (3.5mm) bakeng sa mocheso o phahameng (95°C), lipheletso tse betlotsoeng 30°/1.6mm, hydrotest ho 18.0 MPa (khatello ea moralo 12.5 MPa). Tšusumetso ea Charpy e tlamang ho -20°C (metsotso 50J, e fihlelletsoe 100-160J). CTOD ho -20°C: tšepe e welded ≥ 0.25mm, HAZ ≥ 0.30mm (e fihlelletsoe 0.35-0.55mm). HIC ka NACE TM0284 Tharollo A, 96h-Kamohelo: CLR = 0%, CTR = 0%, CSR = 0%. SSC ka NACE TM0177 Mokhoa A, 720h ho 90% SMYS-Ha ho na ho petsoha. Bothata bo boholo ke 85 HRB. PWHT e sebelisoa liphaepheng tsohle (koenya 590°C ± 10°C, lihora tse 1.5). 100% UT ka TOFD hammoho le 20% RT. Tlhahlobo ea motho oa boraro ke DNV Australia.
Kopo:Phaephe ea khase e bolila e tsamaisang khase ea tlhaho ho tloha masimong a lebōpong la leoatle (e nang le H₂S ea 15-25 ppm) ho ea fekthering ea LNG e lebōpong la leoatle. Phaephe ea 65 km e kenyelletsa karolo ea metsi a tebileng a ka tlas'a leoatle (botebo ba metsi 200-300m) le karolo ea lebōpong la leoatle ka mobu o senyang. Phaephe ena e sebetsa ho 95°C le 12.5 MPa.
Liphephetso tsa Tekheniki le Litharollo:
● Mocheso o phahameng (95°C) o kopantsoeng le tšebeletso e bolila -Bongata ba liphaephe tsa tšebeletso e bolila li sebetsa ka tlase ho 80°C. Ho 95°C, NACE MR0175 e beha meeli e thata holim'a ho thatafala le khetho ea thepa. Lipoleiti tse khethiloeng tsa Mo-alloyed tsa Womic (Mo 0.20-0.25%) le ho sebelisoa sekoahelo sa 3LPP (polypropylene, se lekantsoe ho 120°C) ho fapana le 3LPE (se lekanyelitsoeng ho 80°C). Mocheso oa PWHT o theohile ho 580°C ho qoba ho tenyetseha ho feteletseng. Ho thatafala kamora PWHT: tšepe ea motheo 78-82 HRB, weld 80-84 HRB-hantle ka hare ho moedi.
● Tlhokahalo ea HIC ea ho se be le mapetso -CLR e hlokahalang ho moreki = 0% (ha ho na mapetso a HIC). Womic e sebelisitse lipoleiti tsa sebabole tse tlase haholo (S ≤ 0.0008%) ka karolelano ea Ca/S 2.2. Kamora PWHT, liteko tsa HIC lisampoleng tse 20 (4 ka mocheso) li bontšitse CLR 0%, CTR 0%, CSR 0%. Tlhahlobo ea microstructure e bontšitse feela globular sulfides (ha ho na MnS e telele).
● Ho tiea ha CTOD bakeng sa riser e tsoang lebōpong la leoatle -Karolo e phahamisang (12 km) e ne e hloka tlhahlobo ea CTOD ho -20°C. Womic e entse CTOD holim'a tšepe ea weld le HAZ. Liphetho: tšepe ea weld 0.40-0.55mm, HAZ 0.45-0.70mm (e kaholimo ho 0.25mm/0.30mm). Re boetse re fane ka likhothaletso tse felletseng tsa ho tšoaneleha bakeng sa ts'ebetso ea welding (WPQ) bakeng sa welding ea field girth.
● Ho khomarela ha mocheso o phahameng (3LPP) -Sekoahelo sa 3LPP se hloka FBE primer (epoxy) le lera le ka holimo la polypropylene. Sekoahelo se sebelisoa ke basali setsing sa mosebetsi se laoloang ke boemo ba leholimo. Matla a ho hlohlora ho 95°C a lekanngoa ho 75 N/cm (bonyane 50 N/cm). Ho aroha ha cathodic ho 95°C kamora matsatsi a 28: ≤ 6mm radius.
● Thepa ea thepa ho ea libakeng tse hōle tsa Bophirimela ba Australia -Liphaephe li ile tsa romelloa ho tloha Shanghai ho ea koung ea Dampier (Australia Bophirima) ka sekepe se seholo (leeto la matsatsi a 28). Ka lebaka la sehla sa sefefo, thepa e 'meli e ile ea lieha. Womic e ile ea fetola kemiso ea tlhahiso ho kopanya thepa le ho qoba ho fokotseha ha litšenyehelo. Lithane tsohle tse 15,100 li ile tsa tlisoa ka har'a fensetere ea projeke.
● Sephetho:Phaephe ea khase e bolila e ile ea qala ho sebetsa kotara ea pele ea 2025. Kamora likhoeli tse 18 tsa ts'ebetso, tlhahlobo ea in-line (ILI) ha ea ka ea bontša ho se lekane ho amanang le HIC kapa SSC. Motsamaisi o amohetse Womic Steel e le mofani ea tšoanelehang bakeng sa merero ea katoloso ea khase e bolila nakong e tlang Shelf ea Leboea-Bophirima.
Ikopanye le rona:
Webosaete: www.womicsteel.com
Imeile: sales@womicsteel.com
Mohala / WhatsApp / WeChat:
Victor: +86 15575100681
Jack: +86 18390957568
Tšepe ea Womic-Molekane oa hau ea tšepahalang bakeng sa liphaephe tsa tšepe tsa LSAW tsa API 5L X65 PSL2 bakeng sa lithapo tsa trunk tsa khase e bolila tse nang le khatello e phahameng, liphaephe tsa metsi a tebileng a lebōpong la leoatle, le lits'ebetso tsa litšebeletso tse nang le asiti lefatšeng ka bophara.
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