API 5L PSL2 Qib X70 Ob Chav -Sided Submerged Arc Vuam (DSAW) Hlau Yeeb Nkab
Lub ntsiab lus tseem ceeb
API 5L PSL2 Qib X70 DSAW (Ob chav-Sided Submerged Arc Vuam) steel yeeb nkabyog tus hwm siab tshaj -lub zog, micro- cov kab sib txuas ua ke tsim los rau American Petroleum Institute specification rau cov kav xa dej tseem ceeb. Qhov kev xaiv "X70" qhia txog qhov tsawg kawg nkaus tawm lub zog ntawm70,000 psi (483 MPa), sawv cev rau qib hwm ntawm qib siab - cov khoom siv kav dej muaj zog .
PSL2 (Product Specification Level 2) yog tustxhim kho qib zoonrog cov kev xav tau nruj dua li PSL1, suav nrog kev tswj cov tshuaj lom neeg nruj dua, yuav tsum muaj kev sim cuam tshuam, kev txwv lub zog siab tshaj plaws, tawm los- rau - tensile ratio tswj, thiab tag nrho traceability . Rau X70, PSL2 yog tus qauv kev xaiv rau cov ntawv thov tseem ceeb xws li ntev -qhov deb siab- cov pa xa hluav taws xob, cov kav dej tawm ntug dej hiav txwv, kev pabcuam arctic, thiab qhov chaw pabcuam qaub.
Txoj kev tsim khoom DSAW-tseem hu ua LSAW (Longitudinal Submerged Arc Vuam)- yog qhov siab - vuam txoj kev ncaj ncees uas siv ob sab hauv thiab sab nraud welds, tsim ib qhoib leeg siab -zoo weld nugget. Cov txheej txheem no yog tsim tshwj xeeb rauloj- txoj kab uas hla, tuab- phab ntsa kavsiv rau hauv kev thov pipeline thov.
Lub npe piav qhia
| Ib feem | Lub ntsiab lus |
|---|---|
| API | Lub koom haum American Petroleum |
| 5L | Specification rau kab yeeb nkab siv nyob rau hauv pipeline tsheb thauj mus los systems |
| PSL2 | Khoom Specification Qib 2 - txhim kho qib zoo nrog cov kev cai nruj dua (yuav tsum tau kuaj xyuas, nruj dua chemistry, max zog txwv) |
| X70 | Qib kev xaiv: "X" qhia qib pipeline, "70" sawv cev rau qhov tsawg kawg nkaus yield zog hauv ksi (70,000 psi / 483 MPa) |
| DSAW | Muab ob npaug rau-Sided Submerged Arc Vuam - ob qho tib si sab hauv thiab sab nraud yog siv; Lub vuam arc yog submerged hauv granular flux thaum vuam |
| Kuj Paub Raws li | LSAW (Longitudinal Submerged Arc Vuam) - thaum lub vuam seam khiav longitudinally raws cov yeeb nkab |
Cov ntsiab lus tseem ceeb
| Yam ntxwv | Kev piav qhia |
|---|---|
| Txuj | API 5L (46th Edition, ua raws li ISO 3183) |
| Khoom Specification Level | PSL2 - txhim kho qib zoo |
| Qib | X70 (L485 hauv ISO cim) |
| Yam tsawg kawg Yield Strength | 483-485 MPa (70,000-70,300 psi) |
| Maximum Yield Strength | 620-635 MPa (90,000-92,100 psi)- PSL2 qhia txog min thiab max |
| Yam tsawg kawg Tensile Strength | 565-570 MPa (82,000-82,700 psi) |
| Maximum Tensile Strength | 758-760 MPa (110,000-110,200 psi) |
| Yield-rau-Tensile Ratio (max) | 0.93- xyuas kom txaus ductility |
| Kev tsim khoom | DSAW (Ob chav -Sided Submerged Arc Vuam) / LSAW (Longitudinal Submerged Arc Vuam) |
| Txoj kev tsim | JCOE(progressive J-C-O forming) los yogUAE(U-ing, O-ing, Expanding) |
| Size Range (DSAW/LSAW) | 406mm txog 1829mm(16 "mus rau 72") OD - raug rau DSAW; mus txog 84 "muaj |
| Phab ntsa Thickness | 6.0mm txog 50mm (txog 75mm rau kev siv tshwj xeeb) |
| Ntev | 6 m txog 12 m txheem; mus txog 18 m muaj |
| Xaus Xaus | Plain xaus, beveled xaus (30℃bevel kaum sab xis) |
| Kev Xa Khoom | X70M(Thermomechanical dov / TMCP) - feem ntau; X70Q (Quenched thiab tempered) muaj |
Tshuaj muaj pes tsawg leeg (PSL2 Requirements)
Tshuaj muaj pes tsawg leeg rau PSL2 X70 (Welded yeeb nkab)
| Lub ntsiab | Qhov siab tshaj % | PSL1 Sib piv |
|---|---|---|
| Cov pa roj carbon (C) | 0.12-0.24% | PSL1 X70: 0.26% - tswj nruj dua |
| Silicon (Si) | 0.45% | Tsis tau teev rau PSL1 |
| Manganese (Mn) | 1.65-1.85% | PSL1 X70: 1.65% - qhov zoo sib xws |
| Phosphorus (P) | 0.025% | PSL1: 0.030% - nruj dua |
| Sulfur (S) | 0.015% | PSL1: 0.030% -50% txo |
| Vanadium (V) | Raws li pom zoo | Micro-Alloying rau cov nplej refinement |
| Niobium (Nb) | Raws li pom zoo | Micro{0}} alloying rau lub zog |
| Titanium (Ti) | Raws li pom zoo | Micro-Alloying rau cov nplej refinement |
| Carbon sib npaug (CEIIW) | 0.43% max | Yuav tsum tau thiab tswj rau weldability |
| Carbon sib npaug (CEpcm) | 0.25% max | Yuav tsum tau thiab tswj |
* Ceeb toom: Tag nrho cov ntsiab lus ntawm micro-alloying ntsiab (Nb + V + Ti) tsis tshaj 0.15%. PSL2 yuav tsum muaj cov pa roj carbon sib npaug (CE) suav thiab tswj kom ntseeg tau tias thaj chaw zoo weldability .*
Mechanical Properties
| Khoom | PSL2 Kev Xav Tau | PSL1 Sib piv |
|---|---|---|
| Yield zog (min) | 483-485 MPa (70,000-70,300 psi) | Yam tsawg kawg nkaus |
| Yield zog (max) | 620-635 MPa (90,000-92,100 psi) | Tsis tau teev tseg |
| Tensile zog (min) | 565-570 MPa (82,000-82,700 psi) | Yam tsawg kawg nkaus |
| Tensile zog (max) | 758-760 MPa (110,000-110,200 psi) | Tsis tau teev tseg |
| Yield-rau-Tensile Ratio | 0.93 max | Tsis tau teev tseg |
| Elongation | Ib tus qauv API 5L (nws txawv ntawm phab ntsa tuab) | Tib yam mis nyuj |
| Charpy Impact (CVN) | Yuav tsum tau- 27J-101J ntawm qhov ntsuas kub (feem ntau 0℃txog -20 degree) | Tsis xav tau |
| Hardness (max) | 250 HV 10(Kev pabcuam qaub: 248 HV10) | Tsis tau teev tseg |
X70 vs. Qhov sib piv Qib Sib Piv (PSL2)
| Qib | Yield zog (min) | Yield zog (max) | Tensile zog (min) | Daim ntawv thov |
|---|---|---|---|---|
| X52 | 359 MPa (52 ksi) | 531 MPa (77 ksi) | 455 MPa (66 ksi) | General kis tau tus mob |
| X60 | 414 MPa (60 ksi) | 565 MPa (82 ksi) | 517 MPa (75 ksi) | High -siab kis |
| X65 | 448 MPa (65 ksi) | 600 MPa (87 ksi) | 531 MPa (77 ksi) | Siab -siab, offshore |
| X70 | 483 MPa (70 ksi) | 620-635 MPa (90-92 ksi) | 565 MPa (82 ksi) | Ntev -qhov deb siab -siab, sab ntug dej hiav txwv, arctic |
| X80 | 552 MPa (80 ksi) | 690-705 MPa (100-102 ksi) | 621 MPa (90 ksi) | Ultra-siab- siab lub cev kab |
X70 muaj kwv yees li 8% siab dua qhov muaj zog tshaj X65, 17% siab dua X60, thiab 35% siab dua X52 .
Delivery Conditions (Kev kho cua sov Suffixes)
PSL2 X70 DSAW cov kav dej tau muab nrog cov lus qhia txog kev kho cua sov:
| Lub ntsiab lus | Qhov xwm txheej | Daim ntawv thov |
|---|---|---|
| X70N | Li qub | General kis tau tus mob, txhim kho grain qauv |
| X70Q | Quenched thiab tempered | Maximum zog uniformity |
| X70M | Thermomechanical yob (TMCP) | Feem ntau - txhim kho toughness thiab weldability |
| x70 qw | Quenched thiab tempered + Sour service | H₂S ib puag ncig nrog NACE ua raws |
| X70 MAS | Thermomechanical dov + Kev pabcuam qaub | H₂S ib puag ncig nrog txhim kho toughness |
Nco tseg: Suffix "S" qhia tias Sour Service thov rau NACE MR0175 .
Dimensional Specifications
| Parameter | Ntau / Tolerance |
|---|---|
| Sab nraud txoj kab uas hla | 406mm txog 1829mm(16 "mus rau 72") - DSAW ntau yam; mus txog 84 "muaj |
| Phab ntsa Thickness | 6.0mm txog 50mm (txog 75mm rau kev siv tshwj xeeb) |
| Txoj kab uas hla Tolerance (Lub cev yeeb nkab) | ± 0.75% ntawm OD |
| Txoj kab uas hla (Cov yeeb nkab kawg, D Tsawg dua lossis sib npaug rau 168.3mm) | -0.4 hli rau +1.6 hli |
| Txoj kab uas hla (Cov yeeb nkab kawg, 168.3mm |
± 0.005D, max ± 1.6 hli |
| Txoj kab uas hla (Cov yeeb nkab kawg, 610mm |
± 1.6 hli |
| Phab ntsa Thickness kam rau ua (t Tsawg dua lossis sib npaug li 5 hli) | ± 0.5 hli |
| Phab ntsa Thickness kam rau ua (5mm |
±0.1t |
| Phab ntsa Thickness kam rau ua (t Ntau dua lossis sib npaug li 15mm) | ± 1.5 hli |
| Ntev | 6 m txog 12 m txheem; mus txog 18 m muaj |
| Tawm ntawm - ntawm - Roundness | Tsawg dua lossis sib npaug li 1% ntawm OD teev |
Yam Loj Muaj (API 5L Qib X70 DSAW):
| OD (inch) | OD (mm) | Phab ntsa Thickness Range (mm) |
|---|---|---|
| 16" | 406 | 6.0 - 14.0 |
| 20" | 508 | 6.0 - 16.0 |
| 24" | 610 | 6.0 - 18.0 |
| 30" | 762 | 7.0 - 21.0 |
| 36" | 914 | 8.0 - 24.0 |
| 40" | 1016 | 8.0 - 26.0 |
| 48" | 1219 | 9.0 - 28.0 |
| 56" | 1422 | 10.0 - 29.0 |
| 60" | 1524 | 10.0 - 29.0 |
| 64" | 1626 | 10.0 - 30.0 |
| 72" | 1829 | 10.0 - 30.0 |
Tau qhov twg los: Raws li cov ntaub ntawv tsim khoom lag luam.
DSAW/LSAW Manufacturing Process
Ob chav -Sided Submerged Arc Vuam (DSAW), tseem hu ua Longitudinal Submerged Arc Vuam (LSAW), yog ib qho kev ua haujlwm siab - siv feem ntau rau cov kav loj - txoj kab uas hla.
Txheej txheem piav qhia
Welding arc yog submerged hauv granular fluxThaum vuam, tiv thaiv cov vuam los ntawm atmospheric paug
Ob sab hauv thiab sab nraud welds yuav tsum tau, feem ntau ua tiav hauv cov txheej txheem sib cais
Cov welds cais noj ib feem ntawm lwm yam, ua rau ib tugib leeg siab -zoo weld nugget
Txoj kev tsim
| Txoj kev | Kev piav qhia | Hom kab |
|---|---|---|
| JCOE | Progressive J-C-O cov kauj ruam (J-shape → C-shape → O-shape), nthuav dav tom qab vuam | 406-1626 hli (16 "-64") |
| UAE | Phaj nias rau hauv U-puab, ces O-puab, nthuav dav tom qab vuam | 508-1118 hli (20 "-44") |
Txheej txheem txheej txheem
Phaj xaiv- Hlau daim hlau ntsib API 5L PSL2 X70 yuav tsum (tag nrho tua, nplua hlau hlau)
Ntug Kev Npaj- Ntug yog beveled los tsim V-puab zawj
tsim- Cov ntawv hlau yog tsim rau hauv cov duab cylindrical siv JCOE lossis UOE presses
Tack Vuam- Cov phaj tsim yog tack-welded kom zoo li qub
Ob chav Submerged Arc Vuam- Cov yeeb nkab seam welded rau ob sab hauv thiab sab nrauv
Txias Expansion- Cov yeeb nkab yuav raug nthuav mus txog 1.5% kom ua tiav qhov kawg ntawm OD
Ultrasonic soj ntsuam- Seam tshuaj xyuas los ntawm kev txuas ntxiv ultrasonic tsis siv neeg qhov tsis pom kev
Hydrostatic Pressure Test-Txhua cov yeeb nkab tau raug kuaj xyuas hydrostatic siab
Ua tiav- Xaus kev, beveling, txheej, thiab kos npe raws li specifications
Kev Ntsuas & Kev Ntsuam Xyuas (PSL2)
| Hom kev xeem | Kev xav tau | Sau ntawv |
|---|---|---|
| Tshuaj ntsuam xyuas | Rau qhov kub ntau | Tighter PSL2 txwv |
| Tensile Test | Rau ntau | Txheeb xyuas qhov txwv min thiab max |
| Yield-rau-Tensile Ratio | Tsawg dua lossis sib npaug li 0.93 | Yuav tsum tau ua pov thawj |
| Charpy Impact Test (CVN) | Yuav tsum tau | Yuav tsum muaj rau txhua qib PSL2; Feem ntau 27J-101J ntawm 0℃lossis -20 degree |
| Flattening Test | Yuav tsum tau | Txheeb xyuas qhov ductility thiab weld kev ncaj ncees |
| Khoov Test | Yuav tsum tau | Verifies weld kev ncaj ncees |
| Hydrostatic Test | Txhua lub raj | Kev ntsuas siab ncaj ncees |
| Kev soj ntsuam ultrasonic (UT) | 100% ntawm weld seam | Yuav tsum tau rau PSL2 |
| X-Ray Inspection (RT) | Thaum tau teev tseg | Rau kev siv tseem ceeb; 100% muaj raws li qhov kev thov |
| Kev Xeem Hardness | Rau kev pabcuam qaub | Hardness daim ntawv qhia yuav tsum tau; Tsawg dua lossis sib npaug rau 250 HV10 (Less dua lossis sib npaug rau 248 HV10 rau qaub) |
| Kev xeem HIC/SSC | Rau kev pabcuam qaub | Raws li NACE MR0175 / ISO 15156 |
| DWTT (Drop Weight Tear Test) | Rau cov kev siv tseem ceeb | Fracture toughness xyuas |
| Dimensional soj ntsuam | 100% | Raws li tus qauv tolerances |
| Mill Test Certificate | EN 10204 Hom 3.1B | Muab tag nrho cov kev xeem |
PSL1 vs. PSL2 Sib piv rau X70
| Feature | PSL 1 X 70 | PSL 2 X 70 | Qhov tseem ceeb |
|---|---|---|---|
| Cov pa roj carbon (C) max | 0.26% | 0.12-0.24% | 54% txo- zoo dua weldability, qis HAZ hardness |
| Sulfur (S) max | 0.030% | 0.015% | 50% txo- tseem ceeb rau toughness thiab HIC kuj |
| Phosphorus (P) max | 0.030% | 0.025% | Txhim kho toughness thiab weldability |
| Manganese (Mn) max | 1.65% | 1.65-1.85% | Siab dua rau lub zog optimization |
| Yield zog | 483 MPa min xwb | 483-635 MPa ntau | Tiv thaiv tshaj - cov ntaub ntawv muaj zog |
| Tensile zog | 565 MPa min xwb | 565-760 MPa ntau | Xyuas kom zoo ib yam mechanical zog |
| Yield-rau-Tensile Ratio | Tsis tau teev tseg | Tsawg dua lossis sib npaug li 0.93 | Xyuas kom txaus ductility |
| Charpy Impact Testing | Tsis xav tau | Yuav tsum tau(27J-101J ntawm 0℃lossis -20 degree) | Guarantee qis -kub toughness |
| Carbon sib npaug (CE) | Tsis xav tau | Muab xam thiab tswj | Xyuas kom zoo teb weldability |
| NDT Requirements | Txuj | 100% UT yuav tsum taurau PSL2 | Kev kuaj pom zoo dua |
| Traceability | Batch qib | Pipe -los ntawm- yeeb nkab puv traceability | Ua kom tiav cov ntaub ntawv zoo |
| Hardness Tswj | Tsis tau teev tseg | Tsawg dua lossis sib npaug li 250 HV10(qaub: Tsawg dua lossis sib npaug rau 248 HV10) | Qhov tseem ceeb rau kev siv qaub qaub |
| Hom kev siv | Kev pabcuam dav dav, kab dej, tsis yog - tseem ceeb | Kev pabcuam tseem ceeb, kev pabcuam qaub, qhov kub thiab txias, offshore, arctic |
Cov ntawv thov siv
| Daim ntawv thov | Kev piav qhia |
|---|---|
| Ntev-Nyob deb siab-Npaj roj xa mus | Cov kab loj hauv lub cev xav tau kev ua haujlwm siab |
| Offshore thiab Subsea Pipelines | Subsea pipelines xav tau lub zog siab - rau - qhov hnyav piv |
| Arctic thiab Cold Climate Pipelines | Tsawg- qhov kub thiab txias ib puag ncig yuav tsum tau lav qhov cuam tshuam toughness |
| Crude Roj Trunk Kab | Cov kab txuas tseem ceeb rau kev thauj cov roj av |
| Onshore Gathering Networks | Regional trunk systems txuas cov chaw tsim khoom rau kev ua haujlwm |
| Chaw nres tsheb thiab Header Piping | Compressor chaw nres tsheb, twj tso kua mis, metering chaw |
| Sour Service | H₂S ib puag ncig (nrog rau qib X70MS/X70QS) |
| Siab -Kev xa dej siab | Loj - txoj kab uas hla, siab - siab dej mains |
| Pipeline Chaw nres tsheb Piping | Siab - cov ntawv thov siab hauv cov kav xa hluav taws xob |
Qhov tseem ceeb ntawm PSL2 X70 DSAW Pipe
| Qhov zoo | Kev piav qhia |
|---|---|
| Lub zog siab tshaj plaws nyob rau hauv Standard Pipeline Qib | 70,000 psi tawm los - 8% siab dua X65, 17% siab dua X60, 35% siab dua X52 |
| Guaranteed Tsawg-Tsub Toughness | Yuav tsum tau Charpy qhov kev ntsuam xyuas (27J-101J ntawm 0℃rau -20 degree) ua kom ntseeg tau tias kev ua tau zoo hauv cov huab cua txias |
| Kev Tswj Xyuas Chemistry nruj dua | 50% qis sulfur cov ntsiab lus (0.015% vs . 0.030%) txhim kho weldability thiab HIC tsis kam |
| Tswj lub zog ntau yam | Lub zog tawm los siab tshaj plaws (635 MPa) tiv thaiv ntau tshaj - cov ntaub ntawv muaj zog uas tuaj yeem ua rau muaj teeb meem vuam |
| Tag nrho Traceability | Pipe-los ntawm- yeeb nkab traceability kom tiav cov ntaub ntawv zoo |
| 100% Ultrasonic soj ntsuam | Yuav tsum tau NDT ua kom muaj kev ncaj ncees ntawm weld seam |
| Micro{0}} alloyed nrog TMCP | Ultra- qis carbon acicular ferrite qauv nrog siab - ntom dislocations muab cov pob txha zoo heev |
| Sour Service Muaj peev xwm | Muaj nrog NACE MR0175 / ISO 15156 ua raws (X70MS / X70QS qib) |
| Loj Loj Muaj peev xwm | DSAW tsim cov kav dej ntawm 16 "mus rau 72" OD - zoo tagnrho rau cov ntawv loj - txoj kab uas hla |
| High Weld Integrity | Muab ob npaug rau- sab vuam tsim ib qho siab - zoo weld nugget |
Txheej txheej xaiv
API 5L PSL2 X70 DSAW yeeb nkab tuaj yeem muab nrog ntau txheej txheej rau kev tiv thaiv corrosion:
| Txheej hom | Zoo tshaj rau | Cov yam ntxwv tseem ceeb |
|---|---|---|
| 3LPE (3-txheej polyethylene) | faus cov kav dej | Feem ntau; kev tiv thaiv corrosion zoo heev, muaj kev cuam tshuam zoo heev |
| FBE (Fusion Bonded Epoxy) | Roj & roj pipelines | Muaj zog adhesion, tshuaj tiv thaiv |
| Coal Tar Epoxy | Marine ib puag ncig | Heavy-lub luag haujlwm tiv thaiv |
| CWC (Concrete Weight Txheej) | Offshore / subsea pipelines | Tsis zoo buoyancy thiab mechanical tiv thaiv |
| 3LPP (3-txheej polypropylene) | Offshore pipelines | Kub kub tsis kam (txog 140 degree) |
| Varnish / Anti- xeb roj | Kev tiv thaiv ib ntus | Luv -lub sij hawm tiv thaiv corrosion thaum thauj |
| Bitumen txheej | Kev pabcuam faus | Tus nqi -kev tiv thaiv zoo |
| Dub Roj Txheej | Standard zeb tiav | Kev tiv thaiv ib ntus |
Xaus Xaus
Muaj cov kev kho mob kawg suav nrog:
Plain xaus (PE)- txheem rau ntau daim ntawv thov
Beveled xaus (BE)- rau qhov chaw vuam (30℃bevel kaum sab xis)
Xov xaus- rau kev sib txuas tshuab
International Approximations
| Txuj | Qib sib npaug | Sau ntawv |
|---|---|---|
| TS EN ISO 3183 | L485ME or X70ME | Kev sib haum xeeb nrog API 5L; "E" qhia tias tsim nyog rau offshore / arctic |
| GB/T 9711 | L485 | Suav sib npaug |
| DNV OS{0}}F101 | Qib 485 | Offshore txheem |
| TS EN 10208-2 | L485 MB | European sib npaug |
Kev txiav txim siab tseem ceeb
1. PSL2 yog tus qauv rau kev siv tseem ceeb X70
PSL2yog yuav tsum tau rau qis- kev pabcuam kub (tshwj xeeb tshaj yog qis dua 0 degree), kev pabcuam qaub (H₂S ib puag ncig), cov kav dej tswj hwm (FERC, DOT), cov ntawv thov sab nrauv, kev pabcuam arctic, thiab cov txheej txheem tseem ceeb
PSL1tsis tshua muaj teev rau X70 hauv cov ntawv thov tseem ceeb
2. Kev ntsuas qhov ntsuas kub
Standard Charpy Impact Test yog nyob ntawm0 degreenrog 27J yam tsawg kawg nkaus rau PSL2
Rau kev siv arctic, cuam tshuam kev sim ntawm-20 degreelos yog-45 degreetuaj yeem teev nrog lub zog siab dua (txog 101J)
3. Muaj peev xwm ua kua qaub
PSL2 X70 nrog rau cov kev xav tau ntxiv tuaj yeem siv rau kev pabcuam qaub (H₂S ib puag ncig):
X70MS/X70QScov qib tshwj xeeb tsim los rau kev pabcuam qaub
Kev kuaj Hardness (tsawg dua lossis sib npaug rau 248 HV10)
HIC thiab SSC xeem rau NACE TM0284 thiab NACE TM0177
Cov ntsiab lus sulfur yuav raug txwv ntxiv rau Tsawg dua lossis sib npaug li 0.002%
4. Kev xa khoom xa tuaj
PSL2 X70 DSAW kav feem ntau yog muab rau hauv cov xwm txheej hauv qab no:
X70M- Thermomechanical dov (TMCP) - feem ntau siv rau kev txhim kho toughness thiab weldability
X70Q- Quenched thiab tempered - rau siab tshaj plaws lub zog uniformity
X70N- Normalized - rau kev txhim kho cov qauv nplej
5. DSAW Cov Kev Cai Loj
DSAW manufacturing rau X70 feem ntau muaj los ntawm16" to 72" OD
Cov kab me me (hauv qab 16 ") feem ntau yog tsim los ntawm ERW los yog seamless txoj kev
6. Weldability
Cov ntsiab lus carbon tsawg (tsawg dua lossis sib npaug li 0.12-0.24%) ua kom zoo weldability
Haum rau txhua txoj kev vuam txheej txheem (SMAW, GTAW, GMAW, SAW)
Preheat yuav tsum tau rau cov ntu tuab (feem ntau 100-150 degree)
Rau cov ntawv thov kev pabcuam qaub, yuav tsum muaj kev coj ua qis hydrogen
Cov txheej txheem vuam tsim nyog nrog kev cuam tshuam - kuaj cov khoom siv hlau tseem ceeb
7. NDT Requirements
100% ultrasonic soj ntsuam (UT) ntawm weld seamyog yuav tsum tau rau PSL2
X-Ray tshuaj ntsuam xyuas (RT) muaj nyob rau ntawm kev thov, tshwj xeeb tshaj yog rau cov ntawv thov tseem ceeb
Rau kev pabcuam qaub, yuav xav tau NDT ntxiv
8. Thib peb-Kev soj ntsuam tog
Muaj cov kev pabcuam tshuaj xyuas suav nrog SGS, BV, Lloyds, DNV, TÜV
9. Mill Test Certificate
Feem ntau muab raws liEN 10204 Hom 3.1Bnrog tag nrho cov kev xeem
Thib peb-kev tshuaj ntsuam xyuas muaj nyob rau thaum thov
10. Kev tswj hwm kev ua raws cai
PSL2 yuav tsum tau rau cov kav dej tswj los ntawm:
FERC(Federal Energy Regulatory Commission)
DOT(Department of Transportation)
FEMSA(Federal Environmental, Management thiab Safety Agency)
PED (Cov Lus Qhia Cov Khoom Siv Siab) rau Tebchaws Europe
Cov ntsiab lus
API 5L PSL2 Qib X70 Ob Chav -Sided Submerged Arc Welded (DSAW/LSAW) steel yeeb nkabyog tus hwm siab tshaj - lub zog kab yeeb nkab specification rau qhov xav tau tshaj plaws kev siv kav dej. Nrog yam tsawg kawg nkaus tawm lub zog ntawm70,000 psi (483 MPa)- kwv yees li8% siab dua X65, 17% siab dua X60, thiab35% siab dua X52- thiab tau lees tias Charpy cuam tshuam qhov hnyav, cov khoom siv no yog qhov kev xaiv zoo tshaj plaws rau qhov ntev -kev deb siab- cov roj xa hluav taws xob, cov kav dej tawm ntug dej hiav txwv, cov kev pabcuam hauv Arctic, thiab cov kev pabcuam qaub.
Cov yam ntxwv tseem ceeb:
Khoom txheem: API 5L PSL2 X70 - hwm siab - qib zog rau kev pabcuam tseem ceeb
Yield zog483 MPa (70,000 psi) yam tsawg kawg nkaus - 8% siab dua X65, 17% siab dua X60
Tensile zog565 MPa (82,000 psi) yam tsawg kawg nkaus
PSL2 qib zoo: Kev ntsuas qhov yuav tsum tau ua, 50% qis sulfur (0.015% vs. 0.030%), siab tshaj plaws lub zog txwv (tsawg dua lossis sib npaug rau 635 MPa), tawm los- rau- qhov sib piv tensile Tsawg dua lossis sib npaug rau 0.93, thiab tag nrho traceability
DSAW manufacturingtsim cov kav dej los ntawm16" to 72" ODnrog phab ntsa thickness mus txog50 mm
Ob -sab vuamtsim ib lub siab -zoo weld nugget
JCOE lossis UOE tsimcov txheej txheem kom paub meej qhov tseeb qhov tseeb
100% ultrasonic kuajntawm weld seam yog yuav tsum tau
Weldability zoo heevnrog cov ntsiab lus carbon tsawg (tsawg dua lossis sib npaug li 0.12-0.24%)
Sour kev pabcuam muaj peev xwmNrog NACE MR0175 / ISO 15156 ua raws (X70MS / X70QS qib)
TMCP kev xa khoom(X70M) muab kev txhim kho toughness thiab weldability
Cov ntawv thov uas muaj xws li:
Ntev -qhov deb siab- cov kav xa hluav taws xob siab
Offshore thiab subsea pipelines
Arctic thiab txias huab cua pipelines
Cov ntawv thov kev pabcuam qaub (nrog rau qib X70MS/X70QS)
Crude roj trunk kab
Chaw nres tsheb thiab header piping
High -kwj dej xa hluav taws xob
Thaum ordering, qhia:API 5L PSL2 Qib X70M (los yog X70Q), DSAW / LSAW (Ob chav-Sided/Longitudinal Submerged Arc Welded), Loj (OD x WT), Ntev, Qhov Kawg Finish (plain / beveled), Coating Requirements, Impact Test Temperature (eg, 5 0 degree), EN 10204 Hom 3.1B
Rau cov ntawv thov kev pabcuam qaub, qhia meejX70MS or X70 QSnrog NACE MR0175 / ISO 15156 ua raws. Rau cov haujlwm uas xav tau tshaj plaws, xav txog kev qhia meejDNV Hom Kev Pom Zoo, EN 10204 3.2 ntawv pov thawj, thiab thib peb -kev soj ntsuamlos xyuas kom meej tag nrho ua raws li cov qauv thoob ntiaj teb.
