1. Womic Steel: Mphamvu Zopangira ndi Mphamvu za Kampani
Womic Steel Group imagwiritsa ntchito mizere yambiri yopangira ya LSAW yomwe imagwiritsidwa ntchito makamaka popangira makoma olemera komanso mainchesi akuluakulu. Mapaipi a ASTM A252 Giredi 3 amafunika kusinthasintha kwakukulu komanso mphamvu zokhazikika zoyendetsera matabwa (kuponya nyundo) popanda kusweka.
● Mzere wa JCOE:Pa mainchesi 406mm – 1,422mm (16″–56″), makulidwe a khoma mpaka 50.8mm. Yoyenera kugwiritsidwa ntchito pa milu ya maziko a milatho ndi nyumba.
●Mzere wa UOE:Pa mainchesi 508mm – 1,220mm (20″–48″), makulidwe a khoma mpaka 40mm. Amapanga milu yozungulira kwambiri kuti azitha kuyendetsa bwino.
●Mbale Yozungulira (Msoko Umodzi - Khoma Lolemera):Pa mainchesi 600mm – 3,500mm (24″–138″), makulidwe a khoma kuyambira 25mm mpaka 100mm. Chingwe chimodzi chopindidwa ndi kulumikizidwa motalikirana. Chabwino kwambiri pa milu yayikulu yamadzi ndi milu ya jekete lakunja.
● Mbale Yokulungidwa (Msoko Wawiri):Pa mainchesi 1,200mm – 3,500mm (48″–138″), makulidwe a khoma mpaka 100mm. Mizere iwiri yopingasa. Yogwiritsidwa ntchito ngati milu yayikulu kwambiri ya maziko a m'nyanja.
Mphamvu yonse ya LSAW imaposa matani 300,000 pachaka, ndipo kupanga mapaipi owonjezera kumapitirira matani 120,000 pachaka. Womic Steel ili ndi ISO 9001, CE (EN 10219, EN 10248), ndipo imatha kupereka kuwunika kwa chipani chachitatu ndi SGS, BV, ABS, DNV, ndi TÜV. Mapaipi opitilira 500 km opangidwa padziko lonse lapansi amaperekedwa padziko lonse lapansi kuti agwiritsidwe ntchito m'madoko, milatho, ndi maziko akunja.
Kusinthasintha kwa Kupanga kwa ASTM A252 Giredi 3:
●JCOE: 406–1,422mm OD × 6.0–50.8mm WIT × ≤ 18m
●UOE: 508–1,220mm OD × 6.0–40.0mm Kulemera × ≤ 24m
●Mbale yozungulira (msoko umodzi): 600–3,500mm OD × 25–100mm Kulemera × ≤ 18m (mpaka 60m polumikiza zigawo zingapo)
●Mbale yozungulira (msoko wawiri): 1,200–3,500mm OD × 25–100mm Kulemera × ≤ 18m
Pa kutalika kwakukulu mpaka 60m, Womic imatha kulumikiza magawo angapo kuyambira kumapeto mpaka kumapeto pogwiritsa ntchito ma weld ozungulira a SAW olowera kwathunthu (omwe amayesedwa 100% UT). Milu yayitali iyi imachepetsa ma splices amunda panthawi yoyika.
2. ASTM A252 Giredi 3: Kapangidwe ka Zinthu & Makhalidwe Abwino
ASTM A252 Giredi 3 ndiye giredi yamphamvu kwambiri mu A252 specification ya mapaipi olumikizidwa komanso osalumikizana. Mphamvu yocheperako yopezera mphamvu ndi 345 MPa (50,000 psi) ndi mphamvu yokoka ya 455 MPa (66,000 psi). Mosiyana ndi API 5L, A252 ilibe magulu a PSL1/PSL2 koma imafuna ductility yabwino (longation) ndi weld kulimba kuti iyendetsedwe pamunda.
Kapangidwe ka Mankhwala (max % ndi kulemera - kawirikawiri pa Giredi 3, ASTM A252 siilamula malire okhazikika):
| Chinthu | Mtundu Wamba (Chitsulo cha Womic) |
| C | 0.20 – 0.26 |
| Mn | 0.80 – 1.30 |
| P | ≤ 0.030 |
| S | ≤ 0.030 |
| Si | 0.15 – 0.40 |
| CEV | ≤ 0.45 (nthawi zambiri ≤ 0.42) |
Womic imagwiritsa ntchito milingo yolamulidwa ya kaboni ndi manganese kuti ikwaniritse mphamvu ya Giredi 3 pamene ikusunga kusinthasintha kwabwino komanso kusinthasintha kwa nthaka.
Katundu wa Makina (Kutentha kwa Chipinda):
| Katundu | ASTM A252 Giredi 3 |
| Mphamvu Yopereka (mphindi) | 345 MPa (50,000 psi) |
| Mphamvu Yokoka (mphindi) | 455 MPa (66,000 psi) |
| Kutalika (mphindi) | 20% (ya 50mm gauge) |
| Kuuma (kwachizolowezi) | 75-85 HRB |
Kuyerekeza ndi Magiredi a ASTM A252:
| Giredi | MPa yotuluka (mphindi) | MPa yolimba (mphindi) | Ntchito Yachizolowezi |
| Giredi 1 | 205 | 310 | Ntchito yopepuka, kuyika zinthu kwakanthawi |
| Giredi 2 | 240 | 415 | Kuyika maziko onse |
| Giredi 3 | 345 | 455 | Ntchito yolemera, maziko akuya, zapamadzi |
Giredi 3 ndi yolimba pafupifupi 40% kuposa Giredi 2, zomwe zimapangitsa kuti makoma akhale ochepa kapena kuti akhale ndi mphamvu zambiri zonyamula katundu wofanana.
3. Kutsatira Miyeso ndi Magawo a Dimensional Range
| Chinthu | Kufotokozera |
| Muyezo | ASTM A252 Giredi 3 (komanso Giredi 1, Giredi 2 ikupezeka) |
| Njira Zopangira | JCOE, UOE, mbale yozungulira (msoko umodzi/wawiri) |
| Kunja kwa Makulidwe Aakulu | 219mm – 3,500mm (8″ – 138″) |
| Makulidwe a Wall | JCOE/UOE: 6.0mm – 50.8mm; Mbale yozungulira: 25mm – 100mm |
| Kutalika kwa Utali | Mulingo: 6m, 12m, 18m; Wotambasuka: mpaka 60m (zigawo zolumikizidwa) |
| Mapeto Omaliza | Mapeto Opanda Ulusi (PE), Mapeto Opindika (BE), kapena olumikizidwa ndi ulusi (ngati apempha) |
| Kumaliza Pamwamba | Wopanda kanthu, Wopaka Mafuta, Wokutidwa ndi Wakuda, Wopaka Epoxy, Wopaka Malala, Wopaka Zinc (wokhala ndi galvanized) |
| Kulekerera | OD: ± 0.75% kapena ± 3.2mm; Kulemera: -0% / + 15%; Kutalika: + 100mm / -0mm popangira zinthu (zosakhwima kwambiri kuposa API) |
| Kuwongoka | ≤ 0.2% ya kutalika (kwachizolowezi) |
4. Miyeso ndi Mafotokozedwe Omwe Alipo - Chitoliro cha Chitsulo cha ASTM A252 Giredi 3 LSAW (Makulidwe Omwe Asankhidwa)
| OD (mm) | Zosankha za WT (mm) | Njira | Kulemera pafupifupi (kg/m2) | Kutalika Kwanthawizonse | Ntchito Yachizolowezi |
| 219 | 6.4, 8.0, 10.0, 12.5 | JCOE | 33.6 – 63.6 | 12m / 18m | Maziko omanga |
| 273 | 6.4, 8.0, 10.0, 12.5 | JCOE | 42.1 – 80.1 | 12m / 18m | Doko la mlatho |
| 324 | 8.0, 10.0, 12.5, 14.0 | JCOE | 62.4 – 107.1 | 12m / 18m | Kuyika zitseko |
| 406 | 8.0, 10.0, 12.5, 14.0, 16.0 | JCOE/UOE | 78.5 – 153.9 | 12m / 18m | Maziko a doko |
| 508 | 10.0, 12.5, 14.0, 16.0, 19.0 | UOE | 122.8 – 229.1 | 12m / 18m / 24m | Kuyika zinyalala m'madzi |
| 610 | 12.5, 14.0, 16.0, 19.0, 22.0 | UOE | 184.2 – 319.1 | 12m / 18m / 24m | Kukula kwa doko |
| 711 | 12.5, 14.0, 16.0, 19.0, 22.0, 25.4 | JCOE/UOE | 215.3 – 429.4 | 12m / 18m | Nsanja yapanyanja |
| 813 | 14.0, 16.0, 19.0, 22.0, 25.4, 30.0 | JCOE | 275.9 – 579.8 | 12m / 18m | Maziko akuya |
| 914 | 16.0, 19.0, 22.0, 25.4, 30.0, 35.0 | JCOE/Yokulungidwa | 354.4 – 759.2 | 12m / 18m | Mlatho wa Bridge |
| 1,016 | 19.0, 22.0, 25.4, 30.0, 35.0, 40.0 | Yopindidwa | 467.1 – 963.9 | 12m / 18m | Malo oimika sitima zapamadzi |
| 1,220 | 22.0, 25.4, 30.0, 35.0, 40.0, 45.0, 50.0 | Yopindidwa | 650.0 – 1,450.5 | 12m / 18m | Jekete lakunja |
| 1,422 | 25.4, 30.0, 35.0, 40.0, 45.0, 50.0, 60.0 | Yopindidwa | 875.1 – 2,016.8 | 12m / 18m | Milu ikuluikulu ya m'nyanja |
| 1,600 | 30.0, 40.0, 50.0, 60.0, 70.0, 80.0 | Yopindidwa (iwiri) | 1,162 - 3,000 | 12m / 18m | Maziko a madzi akuya |
| 2,000 | 40.0, 50.0, 60.0, 70.0, 80.0, 90.0 | Yopindidwa (iwiri) | 1,933 – 4,240 | 12m | Ntchito yaikulu ya doko |
| 2,500 | 50.0, 60.0, 70.0, 80.0, 90.0, 100.0 | Yopindidwa (iwiri) | 3,023 – 5,917 | 12m | Kapangidwe kake ka nyanja ka Mega |
| 3,000 | 60.0, 70.0, 80.0, 90.0, 100.0 | Yopindidwa (iwiri) | 4,351 – 7,149 | 12m | Famu ya mphepo ya m'mphepete mwa nyanja |
Mapaipi olemera omangira khoma (≥ 50mm) angafunike PWHT kuti achepetse kupsinjika kotsala. Pa malo ouma (a m'nyanja), njira yowonjezera yowongolera kuuma ingaperekedwe ngati itapemphedwa.
5. Miyezo ndi Magiredi Ofanana - Chitoliro Chopangira Zinthu Zomangira
| Muyezo | Magiredi a Zitsulo | Ntchito Yachizolowezi | Njira Yopangira |
| ASTM A252 | Giredi 1, 2, 3 | Kuyika maziko, za m'nyanja | JCOE/UOE/Yokulungidwa |
| EN 10248 | S235GP, S275GP, S355GP | Chitoliro chokulungidwa ndi chitoliro (chotenthetsera) | Yopindidwa |
| EN 10219 | S235JRH, S275JRH, S355JRH, S355J2H | Zigawo zopanda kanthu zopangidwa ndi chitsulo chozizira | JCOE/Yokulungidwa |
| API 5L | GR.B, X42, X52 | Kusonkhanitsa mapulatifomu a mafuta/gasi | JCOE/UOE |
| ASTM A500 | GR.B, GR.C | Kapangidwe ka chubu chozungulira | JCOE |
| BS 7191 | S275, S355 | Kapangidwe ka nyumba za m'mphepete mwa nyanja | Yopindidwa |
Chidule cha kagwiritsidwe ntchito:Maziko a mlatho, kuyika madoko ndi doko, milu ya majekete a pulatifomu ya m'mphepete mwa nyanja, maziko a ma turbine a mphepo, maziko omanga nyumba zozama, ma cofferdams, machitidwe a fender a m'madzi.
6. Njira Zopangira - LSAW ya ASTM A252 Giredi 3 Mapaipi a Chitsulo
Womic Steel imasankha njira yogwiritsira ntchito potengera kukula kwa khoma ndi m'mimba mwake. Pa ntchito zoyikamo zinthu, kulekerera kwa miyeso sikokhwima kwambiri kuposa API 5L, koma kulimba kwa weld ndi ductility ndizofunikira kwambiri poyendetsa nyundo.
Njira ya JCOE (406–1,422mm OD, 6.0–50.8mm WET):
● Kupera mbale m'mphepete (bevel yosavuta, palibe lamulo lokhwima la X kapena J)
● Kupanga motsatizana kwa JCO
● Kuwotcherera kwa SAW (mkati ndi kunja)
● Kukulitsa kwa makina (ngati mukufuna - mapaipi oyikamo nthawi zambiri safuna kukulitsa)
● Yoyenera milu yambiri ya maziko
Njira ya UOE (508–1,220mm OD, 6.0–40mm WET):
● Kanikizani U ndi O-kanikizani ndi kukulitsa
● Imapanga milu yozungulira kwambiri - yothandiza poyendetsa bwino m'mabowo omwe abooledwa kale
● Amagwiritsidwa ntchito popangira milu ya nsanja za m'mphepete mwa nyanja
Mbale Yopindidwa (Msoko Umodzi) wa Khoma Lolemera & M'mimba mwake Waukulu (600–3,500mm OD, 25–100mm WIT):
● Kupindika kwa mipukutu inayi mu silinda
● Kuwotcherera kwa SAW kwa Longitudinal (kulumikiza makoma okhuthala ndi ma multi-pass)
● Palibe kukulitsa kwa makina (kulekerera kwa dzira ± 0.75% ndikovomerezeka poyika mulu)
● Yabwino kwambiri pa milu ikuluikulu ya m'nyanja komwe kuzunguliridwa sikofunikira kwambiri kuposa mphamvu yonyamula katundu
Mbale Yopindidwa (Msoko Wawiri) wa Chimake Chachikulu Kwambiri (1,200–3,500mm OD, 25–100mm WIT):
● Mapepala awiri okulungidwa ndi kulumikizidwa pamodzi ndi mipiringidzo iwiri
● Msoko uliwonse wa 100% UT ndi RT unayang'aniridwa
● Amagwiritsidwa ntchito pa milu yayikulu kwambiri ya mainchesi (ma monopile a famu ya mphepo mpaka 10m OD)
Kupanga Mulu Wautali (mpaka 60m):Pa ntchito zomwe zimafuna milu yayitali kwambiri (monga milu ya mphepo ya m'mphepete mwa nyanja), Womic imatha kuluka magawo angapo a 12m kapena 18m kuyambira kumapeto mpaka kumapeto pogwiritsa ntchito milu yozungulira ya SAW yozungulira yonse. Choluka chilichonse chozungulira chimawunikidwa ndi 100% UT ndi RT. Choluka chomalizidwa chimachepetsedwa kupsinjika (PWHT) ngati makulidwe a khoma akupitirira 40mm.
7. Njira Zowongolera Ubwino ndi Kuyesa Chitoliro cha Chitsulo cha ASTM A252 Giredi 3 LSAW
| Gawo | Njira Yowunikira | Cholinga |
| Mbale | Kusanthula kwa Mankhwala | Tsimikizirani kuchuluka kwa kaboni/manganese |
| Mbale | Mayeso Olimba | Tsimikizani kuchuluka ndi kukhuthala (≥ 345/455 MPa) |
| Mbale | Mayeso Opindika | Kutsimikizira kwa Ductility |
| Mukukonzekera | Mawonekedwe (OD, WT, ovality) | Onetsetsani kuti chitoliro chili chofanana |
| Msoko wolukidwa | Kuyesa kwa Ultrasound (100% pa milu yofunika kwambiri) | Dziwani zolakwika za weld |
| Msoko wolukidwa | RT (malo - 10% yodziwika bwino poyikamo) | Kutsimikizira khalidwe la weld |
| Msoko wolukidwa | MPI (zophimba zala) | Ming'alu ya pamwamba (yofunikira pa milu yoyendetsedwa) |
| Chitoliro chomalizidwa | Mayeso a Hydrostatic (ngati mukufuna - kuyika zinthu zambiri sikufuna nthawi zambiri) | Pokhapokha ngati zatchulidwa |
| Chitoliro chomalizidwa | Mayeso Okhota Otsogozedwa (kuwotcherera) | Kusinthasintha kwa weld poyendetsa |
| Chitoliro chomalizidwa | Mayeso Ophwanyika | Kuyenda bwino kwa thupi la chitoliro |
| Chitoliro chomalizidwa | Zojambula ndi Zolemba | Mkhalidwe wa pamwamba, kutalika kwa chizindikiro |
Kwa milu yoyendetsedwa (kukhazikitsa nyundo):Mayeso a Weld MPI ndi ma guided bend tests ndi ofunikira kwambiri kuti weld isagwedezeke.
Zosankha pa malo okhala m'nyanja kapena owononga:
● Kuyang'anira zophimba (kuzindikira tchuthi, kumamatira, makulidwe)
● Kuyesa kuuma (kwa malo okhala ndi madzi oundana)
● PWHT ya milu yokhuthala ya makoma (> 50mm)
8. Mapulogalamu Oyambirira - Chitoliro cha Chitsulo cha ASTM A252 Giredi 3 LSAW
●Maziko a mlatho- Milu yozama ya matabwa a milatho m'mphepete mwa mitsinje ndi nthaka yofewa
● Kuyika zipilala za doko ndi doko- Madoko, makoma a doko, maziko a malo osungira ziwiya
● Milu ya majekete a pa pulatifomu yakunja- Milu ya maziko a malo opangira mafuta/gasi m'madzi osaya kwambiri mpaka apakati
● Maziko a nsanja ya turbine ya mphepo- Ma monopile a mafamu amphepo a m'mphepete mwa nyanja (nthawi zambiri mainchesi akuluakulu, khoma lokhuthala)
● Nyumba zazitali zokhala ndi maziko olimba- Milu yonyamula katundu ya nyumba zazitali m'mizinda
● Milu yothandizira ma fender a m'nyanja- Makina otetezera sitima kuti zifike pamalo oimikapo sitima
● Makoma a Cofferdams ndi makoma otetezera- Kusunga nthaka kwakanthawi kapena kosatha
● Chikwangwani cha msewu waukulu ndi maziko a ndodo zoyatsira magetsi- Mizere yaying'ono yolumikizirana kuti igwiritsidwe ntchito poyendetsa zinthu
● Milu yokhazikika ya nthaka- Mapulojekiti okonza nthaka
● Maziko a mlatho wa sitima- Zomangamanga za sitima zolemera
9. Kupaka ndi Kutumiza - Chitoliro chachitsulo cha ASTM A252 Giredi 3 LSAW
Mapaipi opachikira nthawi zambiri amatumizidwa mochuluka, nthawi zambiri mwachindunji kumalo omanga.
Kupaka:
● Ma diameter ang'onoang'ono (≤ 610mm): Olumikizidwa ndi zingwe zachitsulo (zingwe 3-5 pa chikwama chilichonse) ndi ma pad oteteza pakona.
● Ma diameter akuluakulu (> 610mm): Mapaipi osiyanasiyana, olekanitsidwa ndi matabwa.
● Milu yolemera ya makoma: Mapaipi amodzi ndi amodzi okhala ndi zothandizira zokhala ndi malo okwana 3-4.
● Zipewa za kumapeto: Zipewa zapulasitiki za malekezero opindika; malekezero osalala angasiyidwe otseguka.
● Chitetezo cha kupaka: Pa milu yophimbidwa, padding ya rabara kapena thovu pakati pa zigawo.
Manyamulidwe:
● Ziwiya zosweka zokhala ndi mainchesi akuluakulu komanso aatali (mpaka mamita 60)
● Malo osungira zinthu okhala ndi mipando yotseguka kapena ziwiya zotseguka zokhala ndi kutalika kofika mamita 18
● Zidebe za mainchesi ang'onoang'ono (< 610mm, ≤ 12m)
● Sitima kapena galimoto yotumizira katundu mkati mwa dzikolo
Zolemba:Satifiketi Yoyesera ya Mill (EN 10204 Mtundu 3.1), lipoti la magawo, malipoti a UT/RT (ngati afotokozedwa), mndandanda wa zolongedza, invoice yamalonda, COO.
10. Ubwino ndi Mafunso Ofunsidwa Kawirikawiri pa Chitsulo cha Womic - Chitoliro cha Chitsulo cha ASTM A252 Giredi 3 LSAW
Chifukwa chiyani Womic Steel ya ASTM A252 Giredi 3 Piling Piling?
●Kutha kwakukulu kwa mainchesi mpaka 3,500mm (138″) - koyenera kwambiri pa ma monopiles ndi ma piles akuluakulu am'madzi
●Khoma lolemera mpaka 100mm - limathandizira katundu wolemera kwambiri wa axial ndi lateral
●Kupanga milu yayitali mpaka 60m - kumachepetsa zomangira za m'munda ndi nthawi yokhazikitsa
●Njira zingapo (JCOE, UOE, mbale yozungulira) zopangira zotsika mtengo
●Kuwunika kwa chipani chachitatu kulipo (SGS, BV, ABS, DNV)
●Mapaipi opitilira 500 km aperekedwa padziko lonse lapansi
●Mitengo yopikisana pa ntchito zazikulu zomanga nyumba
Mafunso Ofunsidwa Kawirikawiri:
Q: Kodi kusiyana pakati pa ASTM A252 Giredi 3 ndi API 5L X52 ndi kotani popangira zinthu?
A: Giredi 3 ili ndi mphamvu zochepa (345 MPa poyerekeza ndi X52's 360 MPa) koma idapangidwira makamaka kuyika zingwe zoyendetsedwa. Ili ndi ductility yayikulu komanso yofunikira kutalika (20% min) ndipo imalekerera kwambiri kukweza katundu panthawi yoyendetsa nyundo. API 5L X52 ingagwiritsidwenso ntchito poyika zingwe, koma Giredi 3 ndiye muyezo wamakampani opangira maziko ku North America ndi mapulojekiti ambiri apadziko lonse lapansi.
Q: Kodi mungapereke milu yayitali kuposa 18m?
A: Inde. Tikhoza kulumikiza zigawo zingapo za 12m kapena 18m pamodzi kuti tipange kutalika mpaka 60m. Chophimba chilichonse chozungulira chimawunikidwa ndi 100% UT ndipo chikhoza kuwunikidwa ndi RT ngati titapempha. Milu yayitali iyi imagwiritsidwa ntchito kwambiri pa ma monopile amphepo ya m'mphepete mwa nyanja (kutalika kwa 30-50m).
Q: Kodi makulidwe a khoma lalikulu kwambiri la chitoliro cha LSAW cha Giredi 3 ndi otani?
Yankho: Msoko umodzi wopindidwa mpaka 100mm, msoko wawiri komanso mpaka 100mm. Kuti muone makulidwe a khoma opitirira 100mm (monga 120mm), chonde titumizireni uthenga kuti muwunikenso ntchito yapadera. Tapereka milu ya 120mm WT ya maziko apadera a madzi akuya.
Q: Kodi mapaipi awa amafunika kuyezetsa madzi?
A: ASTM A252 sifunikira kuyezetsa madzi chifukwa mapaipi opachikira madzi saletsa kupanikizika. Komabe, ngati polojekiti yanu ikufuna kuyezetsa madzi (monga, popachikira madzi pamodzi ndi kunyamula madzi), titha kuchita izi pamtengo wowonjezera.
Q: Ndi chophimba chiti chomwe chikulimbikitsidwa poyika zinthu za m'madzi?
Yankho: Pa malo okhala m'madzi a m'nyanja, epoxy ya malasha (makulidwe a 600-800 microns) kapena epoxy yagalasi ndi yofala. Pa malo okhala ndi splash zone, tikupangira FBE kapena 3LPE yokhala ndi kukana kukwawa. Pa madzi abwino kapena dothi, chitoliro chakuda chopanda kanthu kapena pamwamba pa mafuta nthawi zambiri zimakhala zokwanira.
Q: Kodi mumaonetsetsa bwanji kuti ma welds akupulumuka poyendetsa nyundo?
A: Timachita 100% UT ya weld seam kuphatikiza MPI (magnetic particle inspection) ya zala za weld kuti tizindikire ming'alu iliyonse pamwamba. Timachitanso mayeso owongolera ma bend pa zitsanzo za weld kuti titsimikizire kulimba kwa ductility. Pa ma piles oyendetsedwa ndi critical, titha kuperekanso Charpy impact test pa 0°C kapena kutsika.
Q: Kodi nthawi yogwiritsira ntchito mapaipi a Giredi 3 ndi yotani?
A: Nthawi yokhazikika yoperekera chithandizo: masiku 30-45 a mainchesi ≤ 1,422mm. Pa mapaipi akuluakulu opindidwa (> 1,422mm): masiku 45-60. Pa milu yayitali yolumikizidwa (mpaka 60m): onjezerani masabata 2-3 kuti muwongolere ndikuwunika mozungulira.
Chitsimikizo cha Pulojekiti - Kukulitsa Malo Osungira Zidebe ku Doko la Houston
Dziko:United States (Houston, Texas)
Muyezo ndi Giredi:ASTM A252 Giredi 3 (yokhala ndi mphamvu yowonjezera ya Charpy pa 0°C)
Miyeso ndi Kuchuluka:
●OD 914mm (36″) × Kulemera 19.0mm – 18,000 mamita (pafupifupi matani 7,600) yopangidwa ndi njira ya JCOE
●OD 1,067mm (42″) × Kulemera 22.2mm – 9,000 metres (pafupifupi matani 4,600) yopangidwa ndi msoko umodzi wa rolled plate
●OD 1,219mm (48″) × Kulemera 25.4mm – 3,500 metres (pafupifupi matani 2,500) yopangidwa ndi msoko umodzi wa mbale yokulungidwa (ya malo ogona madzi akuya)
Zonse:Mamita 30,500 (30.5 km) a kudzaza zinyalala, pafupifupi matani 14,700
Mafotokozedwe:Malekezero opanda kanthu (odulidwa sikweya) okhala ndi chamfer, epoxy coating (500 microns, mtundu wa epoxy wa malasha) kuti ateteze dzimbiri m'madzi a brackish Houston Ship Channel. Mayeso okakamiza ophwanyika (palibe ming'alu pambuyo pa 1/3 diameter flattening). Mayeso otsogozedwa okhota a weld ductility. 100% UT ya weld seam kuphatikiza 10% RT spot. MPI ya zala za weld. Charpy impact pa 0°C (min 20J, chizolowezi 40-60J). Kuyang'aniridwa ndi SGS ndi chipani chachitatu.
Ntchito:Kukulitsa Malo Osungira Zinyalala a Bayport ku Doko la Houston. Ntchitoyi idaphatikizapo kumanga malo awiri atsopano okhala (khoma lonse la doko la 1,200m) ndi malo osungira zinyalala m'mbali mwa nthaka. Mapaipi achitsulo amagwira ntchito ngati maziko a kapangidwe ka konkriti (ma pile onyamula katundu wowongoka) komanso ngati ma pile othandizira (kunyamula katundu wowongoka). Kuzama kwa madzi pamalo okhala: 16m.
Mavuto ndi Mayankho a Ukadaulo:
●Malo okhala ndi madzi amchere owononga– Houston Ship Channel ili ndi kuchuluka kwa chloride (10,000-18,000 ppm) ndi pH yotsika (6.5-7.0) chifukwa cha madzi otuluka m'mafakitale. Womic wopaka malasha tar epoxy coating (600 microns DFT) yokhala ndi zigawo ziwiri: primer (200 microns) + topcoat (400 microns). Coating yadutsa mayeso a salt spray a maola 3,000 (ASTM B117) yokhala ndi <2mm creep. Kuzindikira kwa tchuthi kunachitika pa 3.5kV popanda kulephera konse.
●Kuthamanga kwambiri mumchenga wokhuthala– Dothi lomwe lili pamalo oikiramo zinthu limapangidwa ndi mchenga wokhuthala wa matope wokhala ndi mayeso olowera (SPT) N-values a 30-50. Kupsinjika kwa kuyendetsa milu kunafika pa 80% ya mphamvu ya yield. Womic adachita mayeso owongolera kupindika pa ma weld coupon (bend radius 4x thickness, 180°) popanda ming'alu. Tinaperekanso weld MPI pa mulu uliwonse wa 50 kuti tiwonetsetse kuti palibe ming'alu ya zala. Kontrakitala woyendetsa milu wa kasitomala adati palibe welds yosweka panthawi yoyika milu 2,100.
●Mizere yayitali ya malo ogona madzi akuya- Malo otsetsereka kwambiri ankafunika milu yoyendetsedwa mpaka kuzama kwa 32m (20m pansi pa nyanja + 12m pamwamba pa matope). Ma connections okhazikika a 12m amafunika milu itatu yamunda pa mulu uliwonse. Womic inapereka milu 18m yayitali (msoko umodzi wopindika) pa milu 1,067mm ndi 1,219mm, kuchepetsa milu yamunda kuchoka pa 3 mpaka 2 pa mulu uliwonse (kupulumutsa nthawi yowotcherera ya 35%). Tinaperekanso milu 36m yayitali ya fender system (palibe milu yofunikira) powotcherera magawo awiri a 18m kuyambira kumapeto mpaka kumapeto ndi SAW yolowera yonse ndi 100% UT.
●Kulimba kwa mphamvu poyendetsa galimoto m'nyengo yozizira– Kutentha kwa nyengo yozizira ku Houston kumatha kutsika kufika pa -5°C. Kuyendetsa mumsewu pa kutentha kochepa kungayambitse kusweka kwa mabala. Womic yomwe imaperekedwa mu Giredi 3 yokhala ndi kulimba kwa kutentha kochepa: Kugunda kwa Charpy pa 0°C mphindi 20J (standard A252 sikufuna kuyesa kulikonse kogunda). Zotsatira zenizeni: 45-65J pa 0°C, 35-50J pa -10°C. Kasitomala adaphatikiza izi ngati chofunikira chosakhala chokakamiza koma chopindulitsa.
●Kutumiza katundu nthawi yomweyo– Malo omangirawo anali ndi malo ochepa oti akhazikitsidwe (mamita 8,000 okha). Womic inakonza zotumiza katundu kanayi (pafupifupi matani 3,700 iliyonse) m'miyezi 5. Mapaipi ankatumizidwa ndi sitima yapamadzi yothamanga kuchokera ku Shanghai kupita ku Houston, kenako n’kutumizidwa m’magalimoto akuluakulu okwana matani 200 milungu iwiri iliyonse. Gulu la Womic loyendetsa katundu linagwirizana ndi akuluakulu a doko kuti ayambe kutsitsa katundu ndi kutumiza katundu m’magalimoto akuluakulu, kupewa kusungidwa padoko. Zinthu zonse zotumizidwa zinafika mkati mwa masiku ±3 kuchokera pa masiku omwe anakonzedwa.
●Kutsatira malamulo a Buy America waiver– Pulojekiti ya Port of Houston inafuna kuti zitsulo zakunja zichotsedwe chifukwa kupanga kwa US mkati sikunakwaniritse nthawi yake. Womic inapereka zikalata zambiri kuphatikizapo zikalata zomangira, dziko lochokera, ndi kutsata zinthu. Chilolezocho chinavomerezedwa, ndipo matani onse 14,700 analipira US Customs popanda kuchedwa.
● Zotsatira:Kukulitsa malo osungiramo zinthu ku Bayport Container Terminal kunamalizidwa mu kotala lachitatu la 2024, nthawi isanakwane. Mapaipi onse achitsulo 2,100 adapambana mayeso a katundu (kuyesa kwa static load pa 5% ya ma pile: kukhazikika < 10mm pa 2x load yopangidwa). Akuluakulu a doko adanena kuti palibe vuto lililonse la ma pile kapena mavuto ophimba. Womic Steel idalandira mphotho ya "Supplier Performance Excellence" kuchokera kwa kontrakitala wamkulu (kampani yayikulu ya zomangamanga ku US). Malo osungiramo zinthu tsopano akugwira ntchito, ndipo amasamalira ma TEU 1.5 miliyoni pachaka.
Lumikizanani nafe:
Webusaiti: www.womicsteel.com
Imelo: sales@womicsteel.com
Foni / WhatsApp / WeChat:
Victor: +86 15575100681
Jack: +86 18390957568
Womic Steel - Mnzanu wodalirika wa mapaipi achitsulo a ASTM A252 Giredi 3 LSAW a maziko a mlatho, milu ya m'nyanja, maziko omanga nyumba zozama, ndi ma monopile a m'mphepete mwa nyanja padziko lonse lapansi.
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