API 5L X70 Offshore Roj Thiab Roj Pipeline
Cov ntaub ntawv qib ntawmx70 cevUa raws li API 5L tus qauv, muaj qhov tsawg kawg nkaus lub zog ntawm 485 MPa thiab lub zog tensile xws li 570 MPa rau 760 MPa. Qhov siab - tus yam ntxwv muaj zog no ua rau nws tuaj yeem tiv taus siab - kev sib kis ib puag ncig, thaum nws cov weldability zoo heev thiab qis - qhov kub thiab txias ua rau nws haum rau kev siv hauv huab cua hnyav.
Tsis txhob cia lub sij hawm txhuas ncua sij hawm koj cov kev tsim kho vaj tse . 10, 000+ tons ntawm API 5L X70 seamless thiab LSAW kav hauv Tshuag.Fast shipping rauHouston, Dubai, thiab Singapore.
API 5L X70 Offshore Pipeline Size Daim Ntawv Qhia (NPS/DN)
| Nominal Pipe Size (NPS - Ntiv) | Nominal Diameter (DN - hli) | Sab nraud txoj kab uas hla (OD - mm) | Common Phab Ntsa Thickness (Schedules) | Phab ntsa Thickness Range (WT - hli) | Kev tsim khoom |
| 8-5/8" | DN200 | 219.1 | 40, 80, 120, 160 | 8.18 - 23.01 | SMLS / HFW |
| 10-3/4" | DN250 | 273.1 | 40, 80, 120, 160 | 9.27 - 28.58 | SMLS / HFW |
| 12-3/4" | DN300 Nws | 323.8 | 40, 80, 120, 160 | 10.31 - 33.32 | SMLS / HFW |
| 16" | DN400 | 406.4 | 40, 80, 120, 160 | 12.70 - 40.49 | SMLS / LSAW |
| 20" | DN500 | 508.0 | 40, 80, 120, 160 | 15.09 - 50.01 | SMLS / LSAW |
| 24" | DN 600 Nws | 610.0 | Sch40, XS, 80, 160 | 17.48 - 59.54 | LSAW / SMLS |
| 30" | DN750 ua | 762.0 | STD, Sch 80, 120 | 9.53 - 40.00 | LSAW |
| 36" | DN900 Nws | 914.4 | STD, Sch 80, 120 | 9.53 - 50.00 | LSAW |
| 42" | DN1050 | 1066.8 | STD, Sch 80, 100 | 9.53 - 60.00 | LSAW |
| 48" | DN1200 Nws | 1219.2 | STD, Sch 80, 100 | 9.53 - 65.00 | LSAW |
API 5L X70 PSL2 Offshore Pipeline Dimensional Tolerances
| Parameter | Qhov Loj (OD) | Yeeb Nkab Tolerance | Yeeb Nkab End Tolerance |
| OD Tolerance | 60.3mm Tsawg dua los yog sib npaug rau OD <168.3mm | ± 0.75% OD | ± 0.5% OD (Max ± 1.6mm) |
| 168.3mm Tsawg dua lossis sib npaug rau OD Tsawg dua lossis sib npaug rau 610mm | ± 0.75% OD | ± 0.5% OD (Max ± 1.6mm) | |
| OD > 610mm | ± 1.0% OD | ± 1.6 hli | |
| WT kam rau ua | Seamless (SMLS) | +15%, -12.5% | Ib yam li cov yeeb nkab lub cev |
| Welded yeeb nkab | ± 10% lossis ± 1.5mm (Qhov twg me dua) | Ib yam li cov yeeb nkab lub cev | |
| Tawm ntawm - ntawm - roundness (Ovality) | OD Tsawg dua lossis sib npaug rau 610mm | 0.020 Nws | 0.015 OD (Max 15mm) |
| OD > 610mm | 0.020 Nws | 0.010 OD (Max 13mm) | |
| Kev ncaj | Tshaj tag nrho Length | Tsawg dua lossis sib npaug li 0.2% ntawm Tag Nrho Length | N/A |
| Bevel / End Prep | Txuj kev xav tau | 30℃(+5 degree, -0 degree) | Hauv paus ntsej muag: 1.6mm (± 0.8mm) |
API 5L X70 PSL1 vs. PSL2 Kab Pipes rau roj & roj
| Feature | X70 PSL1 | X70 PSL 2 |
| Yield Strength Range | Min 485 MPa | 485 - 635 MPa(Tshwj xeeb nruj) |
| Impact Toughness | Tsis yuam | Yuav tsum tau Charpy V-Ntch Test (0℃lossis -20 degree) |
| Tshuaj muaj pes tsawg leeg | Txheem txwv | Strict Carbon Equivalent (CE) txwv |
| Weld Kho | Tso cai rau qee kis | Txwv tsis pub ntawm cov yeeb nkab lub cev |
API 5L X70 Pipeline Txheej Txheem
Mainstream Manufacturing Process: LSAW (Longitudinal Submerged Arc Vuam) - Qhov Kev Xaiv Zoo Tshaj Plaws rau Loj - Txoj kab uas hla:
UOE Txheej Txheem (Synonymous nrog Precision):
Process Flow: Steel plate edge milling -> U-forming -> O-forming -> Pre-welding -> Internal and external submerged arc welding ->Mechanical expansion (Cold Expansion).
Offshore Advantage: Mechanical expansion yog qhov tseem ceeb. Nws tshem tawm cov kev ntxhov siab uas tshwm sim los ntawm kev tsim cov txheej txheem thiab txhim kho cov yeeb nkab geometric raug (roundness thiab straightness) -ib qho tseem ceeb rau kev siv vuam tshuab hauv qhov tob - hiav txwv ib puag ncig.
JCOE Txheej Txheem (Combining Thick Walls with Flexibility):
Txheej Txheem Flow: Hlau daim hlau tau nce mus rau hauv J-C-O daim duab.
Offshore Advantage: Piv nrog rau cov txheej txheem UOE, JCOE muaj peev xwm tuav ultra- tuab- cov kav dej (txog 40-50 mm), yog li ua tau raws li qhov xav tau nruj rau kev sib tsoo tiv thaiv sab nraud hydrostatic siab ntawm dej hiav txwv tob ntawm ntau txhiab meters.
TMCP (Thermo-Cov Txheej Txheem Kev Tswj Xyuas Tshuab)
Txheej Txheem Txheej Txheem: Los ntawm kev tswj xyuas qhov kub thiab txias thiab deformation theem thaum lub sij hawm dov ntawm cov hlau phaj, qhov zoo -grained microstructure tau ua tiav yam tsis tas yuav ntxiv cov pa roj carbon ntau lossis cov hlau alloying.
Daim ntawv thov tus nqi: Ib qho tsis tshua muaj carbon sib npaug (CEq Tsawg dua lossis sib npaug li 0.40) ua kom ntseeg tau tias X70 steel muaj qhov zoo tshaj plaws weldability nyob rau hauv hnyav offshore tsim tej yam kev mob (yuav tsum tsis txhob preheating, los yog tsuas yog me me preheating), thaum tuav tshwj xeeb heev cuam tshuam toughness txawm nyob rau hauv tsis tshua muaj kub.
Seamless Txheej Txheem (SMLS) - Siab -Txoj Risers thiab Flowlines
Txheej Txheem Flow: Steel billets yog tsim los ntawm kev tho thiab kub - dov txheej txheem.
Offshore Daim Ntawv Thov: Cov kav dej seamless tshem tawm cov kev pheej hmoo cuam tshuam nrog weld seams thiab feem ntau yog siv rau sab ntug dej hiav txwv risers -cov kav dej ntsug txuas cov seabed mus rau sab ntug dej hiav txwv platform, uas raug rau qhov hnyav tshaj plaws kev qaug zog thiab kev hloov siab. Qhov sib txawv ntawm qhov sib txawv ntawm X70 SMLS ua rau nws yog ib qho kev xaiv zoo rau kev tiv thaiv cov kev ntxhov siab nyuaj.
Loj txoj kab uas hla API 5L X70 pipeline hauv Tshuag
Siab -kev ua tau zoo LSAW API 5L X70 kav rau kev sib kis - lub teb chaws.Kev cai phab ntsa thickness mus txog 60 hli nrog JCOE / UOE precision manufacturing txheej txheem.
FAQ
Lub zog tensile ntawm X70 yeeb nkab yog dab tsi?
API 5L X70, tseem hu ua L485, muaj qhov tsawg kawg nkaus lub zog ntawm 485 MPa (70,300 psi) thiab lub zog tensile yam tsawg kawg nkaus ntawm570 MPa (82,700 psi). X70 yog lub siab - cov kav dej muaj zog uas tuaj yeem faib ua PSL1 thiab PSL2 qib. psl2 tuaj yeem faib ua ob lub xeev, Q thiab M.
Qhov hardness ntawm x70 yog dab tsi?
Nyob rau hauv cov nqe lus ntawm hardness, api 5l x70 yeeb nkab feem ntau ntog nyob rau hauv ib tug ntau yam uas sib npaug durability thiab workability. Rockwell hardness tus nqi rau cov khoom no feem ntau nyob ib ncig ntawm80-90 PAB, nyob ntawm kev kho mob thiab tshwj xeeb alloy muaj pes tsawg leeg.
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