ASTM A252 Qib 3 Longitudinal Submerged Arc Vuam (LSAW) Yeeb Nkab
Lub ntsiab lus tseem ceeb
ASTM A252 Qib 3 LSAW yeeb nkab yog covqib siab zogHauv ASTM A252 specification rauwelded steel yeeb nkab pawg. Nws yog ibcarbon steel yeeb nkabmanufactured siv lubLongitudinal Submerged Arc Vuam (LSAW)txheej txheem, tshwj xeeb tsim rauhnyav- lub luag haujlwm hauv lub hauv paus piling thiab daim ntawv thov kev txhawb nqaqhov twg siab tshaj load- bearing peev yuav tsum tau .
Lub npe piav qhia
| Ib feem | Lub ntsiab lus |
|---|---|
| ASTM | ASTM International (American Society for Testing and Materials) |
| A252 | Standard specification rau welded thiab seamless steel yeeb nkab pawg |
| Qib 3 | Covqib siab zognyob rau hauv ASTM A252 specification - haum rau hnyav -load daim ntaub ntawv |
| Longitudinal Submerged Arc Vuam (LSAW) | Kev tsim cov txheej txheem - steel daim hlau yog tsim thiab welded raws ib tug ncaj longitudinal seam siv submerged arc vuam nrog muab tub lim hlau ntxiv. |
Cov yam ntxwv tseem ceeb ntawm ASTM A252 Qib 3 LSAW Yeeb Nkab
| Feature | Kev piav qhia |
|---|---|
| Hom khoom | Tsawg carbon steel / qis- alloy carbon steel- muab zoo heev toughness, ductility, thiab weldability |
| Kev tsim khoom | LSAW (Longitudinal Submerged Arc Vuam)- daim hlau tsim los ntawm UOE, JCOE, los yog yob dabtsi yog khoov txheej txheem, ces muab ob npaug rau -sab submerged arc welded |
| Daim ntawv thov tseem ceeb | Heavy-cov haujlwm piling foundations, choj kev tsim kho, marine structures, thiab siab -load applications |
| Yield zog | 310 MPa (45,000 psi) yam tsawg kawg nkaus |
| Tensile zog | 455 MPa (66,000 psi) yam tsawg kawg nkaus |
| Elongation | 20% yam tsawg kawg nkaus(nws txawv ntawm phab ntsa thickness) |
| Hom Diameter (LSAW) | 168mm txog 1820mm(6 "mus rau 72") |
| Hom Phab Ntsa Thickness | 3.4mm txog 80mm |
| Ntev | 3m32m uatxheem; mus txog 70 m muaj los ntawm qee cov tuam ntxhab |
Chemical Composition (ASTM A252 Qib 3)
| Element | Kev ntsuas kub (max%) | Product Analysis (max%) | Sau ntawv |
|---|---|---|---|
| Cov pa roj carbon (C) | 0.26 | 0.30 | Tsawg carbon rau weldability |
| Manganese (Mn) | 1.35 - 1.6 | 1.40 - 1.6 | Muab lub zog |
| Phosphorus (P) | 0.05 - 0.07 | 0.05 - 0.07 | Tight tswj kom toughness |
| Sulfur (S) | 0.03 - 0.047 | 0.045 | Tswj rau weld zoo |
| Silicon (Si) | 0.45 max | Tsis tau teev tseg | Deoxidizer |
Nco tseg:Cov hlau yuav tsum tsis pub tshaj 0.050% phosphorus.
Mechanical Properties Comparison: ASTM A252 Qib
| Khoom | Qib 1 | Qib 2 | Qib 3 |
|---|---|---|---|
| Yield zog (min) | 205 MPa (30 ksi) | 240 MPa (35 ksi) | 310 MPa (45 ksi) |
| Tensile zog (min) | 345 MPa (50 ksi) | 415 MPa (60 ksi) | 455 MPa (66 ksi) |
| Elongation (min) | 30% | 25% | 20% |
| Lub zog txheeb ze rau qib 1 | Lub hauv paus | +17% tawm | +51% tawm |
| Kev siv zaus | Lub teeb - thauj cov ntawv thov | Feem ntau siv | Heavy-duty, siab-load |
Qhov chaw:
LSAW Manufacturing Txheej txheem rau ASTM A252 Qib 3
Txheej txheem txheej txheem
| Kauj ruam | Kev piav qhia |
|---|---|
| 1. Kev xaiv phaj | High -cov ntawv hlau zoo raug xaiv raws li ASTM A252 cov cai |
| 2. Ntug Kev Npaj | Phaj npoo yog beveled los tsim V-zoo li tus zawj rau vuam |
| 3. kev tsim | Cov phaj yog tsim rau hauv cylindrical duab siv UOE, JCOE, los yog yob dabtsi yog khoov tshuab |
| 4. Tack Vuam | Cov phaj tsim yog tack-welded kom zoo zoo ua ntej vuam kawg |
| 5. Submerged Arc Vuam | Multi-wire SAW siv rau hauv weld, ces sab nraud weld (ob -sided) rau kev nkag mus tag nrho |
| 6. Mechanical Expanding | Cov yeeb nkab yuav raug nthuav dav kom meej qhov ntev kom ua tiav qhov kev ua siab ntev |
| 7. Kev kho cua sov | Tej zaum yuav raug kev ntxhov siab los ntawm kev kho cua sov thaum teev los txhim kho toughness |
| 8. Kev Tshawb Fawb & Kev Xeem | Tsis yog-kev ntsuas kev puas tsuaj nrog rau kev kuaj xyuas ultrasonic thiab kuaj hydrostatic |
| 9. Ua tiav | Xaus beveling (ib ANSI B16.25), daim ntawv thov txheej raws li tau teev tseg |
Cov txheej txheem tsim muaj
| Txoj kev | Kev piav qhia | Haum rau Qib 3 |
|---|---|---|
| UAE | Phaj nias rau hauv U-puab, ces O-puab, mechanically expanded tom qab vuam | Tsim nyog – siab - ntim ntau lawm |
| JCOE | Progressive J-C-O ua cov kauj ruam, nthuav dav tom qab vuam | Haum - siab ua kom raug |
| RBE (Roll dabtsi yog khoov) | Phaj nce dov mus rau hauv lub tog raj kheej | Haum rau kev tsim khoom me me |
Qhov Loj Muaj
| Parameter | Ntau yam | Sau ntawv |
|---|---|---|
| Sab nraud Diameter (LSAW) | 168mm txog 1820mm(6 "mus rau 72") | Txog li 4500mm muaj los ntawm qee cov tuam ntxhab |
| Phab ntsa Thickness | 3.4mm txog 80mm | Txog li 100mm muaj los ntawm qee cov tuam ntxhab |
| Ntev | 3m32m uatxheem;mus 70mmuaj | Ntev ntev txo qhov kev sib tshuam |
| Xaus Xaus | Plain xaus, beveled xaus rau ANSI B16.25 | Beveled rau vuam txheem |
Kev Ntsuas & Kev Ntsuam Xyuas Cov Cai
| Hom kev xeem | Lub hom phiaj | Kev xav tau |
|---|---|---|
| Tshuaj ntsuam xyuas | Txheeb xyuas cov khoom muaj raws li ASTM A252 txwv | Raws li kev ntsuas kub |
| Tensile Test | Paub meej tias yield thiab tensile zog | Rau ntau |
| Flattening Test | Tshawb xyuas ductility | Yuav tsum tau |
| Khoov Test | Txheeb xyuas qhov tseeb ntawm qhov vuam | Yuav tsum tau |
| Hydrostatic Test | Cov ntaub ntawv pov thawj ntawm leak-tightness | Txhua lub yeeb nkab tau sim |
| Kev kuaj ultrasonic | Txheeb xyuas qhov tsis xws luag | 100% ntawm weld seam thaum teev |
| Radiographic Examination (X{0}}ray) | Txheeb xyuas qhov zoo ntawm weld | Thaum tau teev tseg |
| Dimensional soj ntsuam | Txheeb xyuas OD, phab ntsa thickness, ncaj | 100% |
| Impact Test | Xyuas kom toughness | Thaum tau teev tseg |
| Kev tshuaj xyuas qhov muag | Deg mob, weld tsos | 100% |
Mill Test Certificate:EN 10204 / 3.1B feem ntau muab
Daim ntawv thov ntawm ASTM A252 Qib 3 LSAW Yeeb Nkab
Qib 3 yog qhovkev xaiv lub zog siab tshaj plawsthiab tau teev tseg rau cov ntawv thov uas xav tau tshaj plaws:
| Daim ntawv thov cheeb tsam | Kev siv tshwj xeeb |
|---|---|
| Kev tsim kho choj | Lub hauv paus tseem ceeb ntawm lub hauv paus, kev thauj khoom loj-cov kabmob, kev txhawb nqa choj loj |
| Ports thiab Marine Structures | Docks, piers, wharves, offshore platforms yuav tsum tau ntev -lub sij hawm corrosion kuj thiab muaj peev xwm tiv thaiv nkoj berthing cuam tshuam thiab yoj yaig |
| High-Rise Building Foundations | Lub hauv paus sib sib zog nqus rau skyscrapers thiab cov qauv hnyav uas yuav tsum muaj peev xwm thauj khoom siab tshaj plaws |
| Heavy Civil Engineering | Tej yaam num uas nyuaj av tej yam kev mob yuav tsum tau ntxiv load- bearing peev |
| Hydraulic Engineering | Kev txhim kho lub pas dej, qhov dej ntws, qhov chaw nres tsheb hydropower foundation tsim |
| Kev Nyuaj Siab Cov Av | Tej yaam num uas nyuaj hauv av xav tau qhov siab tshaj plaws pawg |
Nco tseg:Qib 3 tshwj xeeb yog xaiv rauloj - cov phiaj xwm lojxws li txuas hniav, chaw nres nkoj, thiab siab -nce vaj tse nyob qhov twgntxiv load-cov kabmob muaj peev xwm thiab siab tshaj plawsyuav tsum tau.
Txheej & Kev Tiv Thaiv Kev Xaiv
| Txheej hom | Daim ntawv thov |
|---|---|
| Dub( liab qab) | Standard zeb tiav, siv sab hauv tsev |
| Varnish / Anti- xeb roj | Kev tiv thaiv ib ntus thaum caij tsheb npav |
| Dub painting | Basic kev tiv thaiv corrosion |
| FBE (Fusion Bonded Epoxy) | Kev tiv thaiv corrosion rau faus kev pabcuam |
| 3LPE (3-txheej polyethylene) | Cov kav dej faus, hnyav ib puag ncig |
| Coal Tar Epoxy | Heavy-lub luag haujlwm tiv thaiv |
| Bitumen txheej | Kev pabcuam faus |
| Galvanized | Sab nraum zoov raug siv |
| Cathodic tiv thaiv | Nws tuaj yeem siv los txuas ntxiv lub neej kev pabcuam |
Kev sib piv: ASTM A252 Hom Kev Tsim Khoom
| Yam | LSAW (Longitudinal) | ERW | SSAW (kauv) | Seamless |
|---|---|---|---|---|
| Weld Seam | Ib leeg ncaj seam | Ib leeg ncaj seam | Nruam kauv seam | Tsis muaj seam |
| Txoj kab uas hla | 6" rau 72" + | Tsawg dua los yog sib npaug rau 24 "tus qauv | 8" rau 120" + | Tsawg dua los yog sib npaug rau 24 "tus qauv |
| Phab ntsa Thickness | Txog li 80 mm | Nruab nrab | Nruab nrab | tuab muaj |
| Daim ntawv thov | Heavy piling, foundations, structural | Me me piling | Loj txoj kab uas hla | Cov ntawv thov tshwj xeeb |
| Qhov tseem ceeb Advantage | Lub zog siab tshaj, zoo heev qhov tseeb | Tus nqi -zoo rau cov kab me me | Loj heev diameters | Uniform quab yuam yam ntxwv |
Qhov zoo ntawm ASTM A252 Qib 3 LSAW Yeeb Nkab
| Qhov zoo | Kev piav qhia |
|---|---|
| Qib Siab Muaj Zog | Qib 3 muab covlub zog siab tshaj plawsntawm ASTM A252 qib, nrog 51% siab zog yield zog dua qib 1 |
| Superior Load-Bearing Capacity | Qhov zoo tshaj plaws rau kev sib sib zog nqus hauv paus thiab kev siv cov txheej txheem hnyav uas yuav tsum tau muaj peev xwm thauj khoom siab tshaj plaws |
| Zoo heev Toughness & Impact Resistance | Tiv thaiv kom tawg thaum muaj kev ntxhov siab, ua kom muaj kev ntseeg siab nyob rau hauv dynamic thiab siab -load puag ncig |
| Loj Loj Muaj peev xwm | LSAW txheej txheem tso cai rau kev tsim cov loj - cov kab loj (txog 72 "+), zoo tagnrho rau cov phiaj xwm loj |
| Phab ntsa tuab | Haum rau cov ntawv thov uas xav tau cov phab ntsa tuab heev (txog 80 hli) |
| High Structure Integrity | Ib leeg longitudinal seam nrog tag nrho - nkag mus rau ob - sab vuam kom ruaj khov thiab txhim khu kev qha |
| Zoo heev Dimensional raug | Mechanical expanding achieves nruj tolerances, kom meej meej tswj cov yeeb nkab qhov ntev |
| Hloov tau ntev | Muaj peev xwm tsim cov pawg ntev (txog 70 m) txo qhov kev sib tshuam thiab txhim kho kev tsim kho |
| Corrosion Resistance Options | Ntau qhov kev xaiv txheej muaj los txuas ntxiv kev pab cuam lub neej nyob rau hauv ib puag ncig hnyav nrog rau cov dej hiav txwv thiab kev lag luam |
| Weldability | Yuav tau welded los yog kho ntawm -site yam tsis tau poob kev ncaj ncees |
| Seismic Resistance | Kev hloov pauv tau zoo thiab kev cuam tshuam tsis zoo, haum rau av qeeg - thaj chaw uas tuaj yeem |
Cov yam ntxwv ua haujlwm
| Yam ntxwv | Kev piav qhia |
|---|---|
| Siab zog & Hardness | Yam tsawg kawg nkaus lub zog ntawm 45,000 psi (310 MPa) thiab tensile zog ntawm 66,000 psi (455 MPa) |
| Kub Kub Resistance | Khaws cov khoom siv kho tshuab hauv qab qhov kub siab |
| Compact nto tiav | Smooth nto txo kev sib txhuam thaum lub sij hawm installation thiab txhim kho cov qauv kev ruaj ntseg |
| Corrosion Resistance | tuaj yeem txhim kho los ntawm 3PE txheej, epoxy hmoov txheej, los yog kev tiv thaiv cathodic rau ntev -lub sij hawm durability nyob rau hauv marine, underground, los yog industrial tej yam kev mob |
| Adaptability | Haum rau ntau yam av thiab complex geological ib puag ncig, tshwj xeeb tshaj yog nyuaj hauv av |
Cov Lus Cim Xaiv Tseem Ceeb
1. Qib 3 vs. Lwm Qib
Qib 3yog covkev xaiv lub zog siab tshaj plaws, haum rau cov kev xav tau tshaj plaws hauv cov ntawv thov suav nrog cov txuas hniav, cov chaw nres nkoj, thiab cov tsev siab -nce
Rau feem ntau cov kev siv hauv paus,Qib 2yog tus qauv xaiv
Rau lub teeb -load lossis daim ntawv thov ib ntus,Qib 1tej zaum yuav txaus
2. Thaum xaiv ASTM A252 Qib 3 LSAW
Kev tsim kho choj- lub hauv paus loj pier pawg yuav tsum muaj peev xwm thauj khoom siab tshaj plaws
Chaw nres nkoj thiab marine lug- docks, wharves, offshore platforms
High-nce tsev hauv paus- lub hauv paus tob rau skyscrapers
Nyuaj av tej yam kev mob- tej yaam num uas nyuaj hauv av yuav tsum tau muaj zog ntxiv
Loj -scale infrastructure– qhov twg siab tshaj plaws durability thiab load- bearing peev yuav tsum tau
3. Kev tsim cov txheej txheem xaiv
LSAWyog nyiam rau:
Loj diameters (Ntau dua lossis sib npaug li 12 ")
Daim ntaub ntawv tuab phab ntsa xav tau lub zog siab
Tej yaam num yuav tsum tau ua pawg ntev
Daim ntawv thov xav tau siab qhov tseeb
Heavy-cov dej num piling yuav tsum muaj kev ntseeg siab tshaj plaws
4. Kev tiv thaiv corrosion
Rau cov qauv mus tas li, qhia cov txheej txheem tsim nyog raws li ib puag ncig
Marine ib puag ncig yuav tsum tau txhim kho kev tiv thaiv corrosion - kev xaiv suav nrog FBE, 3LPE, lossis thee tar epoxy
Kev tiv thaiv Cathodic tuaj yeem siv rau kev ua kom lub neej ntev nyob hauv ib puag ncig hnyav
Rau cov chaw nres nkoj thiab offshore daim ntaub ntawv, corrosion kuj tseem ceeb heev
5. Daim ntawv pov thawj
Txheem:EN 10204 3.1(tus neeg tsim khoom qhov kev ntsuam xyuas ywj pheej)
Xyuas kom Mill Test Certificate muaj xws li: tshuaj muaj pes tsawg leeg, mechanical properties, hydrostatic test results
Thib peb-kev tshuaj xyuas los ntawm SGS, BV, Lloyds feem ntau lees txais rau cov haujlwm tseem ceeb
6. Kev txiav txim siab tsim
Cov yeeb nkab steel ua haujlwm ruaj khov -cov kabmob tivthaiv lossis ua lub plhaub rau cov pob zeb ua vaj tse
Cov kav dej yuav tsum tau kuaj xyuas hydrostatic, flattening, thiab khoov kom ntseeg tau cov qauv kev ncaj ncees
Ntev ntev (txog 70 m) txo qhov sib txuas thiab txhim kho kev txhim kho kev ua haujlwm
Rau ib puag ncig marine, xav txog cov phab ntsa tuab ntxiv rau kev tiv thaiv corrosion
7. Kev sib piv nrog API 5L
ASTM A252 tshwj xeeb raupiling/foundation applications, tsis yog rau kev pabcuam siab
API 5L yog rauroj/gas kis pipelines
Yield zog ntawm A252 Qib 3 (310 MPa) siab dua API 5L Qib B (241 MPa) thiab zoo ib yam li X42 (290 MPa)
Kev txiav txim siab txog qhov kub thiab txias sib txawv - sab laj txog qhov project specifications rau qis - qhov yuav tsum tau muaj kub
Thaum kawg Takeaway: ASTM A252 Qib 3 LSAW Yeeb Nkabyog covlub zog siab tshaj plaws, loj - txoj kab uas hla welded yeeb nkab pawgrau feem ntau xav tau kev siv hauv paus. Nrog yam tsawg kawg nkaus tawm lub zog ntawm45,000 psi (310 MPa) – 51% siab dua Qib 1- nws muajMax load-cov kabmob muaj peev xwmrau qhov tseem ceeb infrastructure tej yaam num. LSAW manufacturing txheej txheem enables zus tau tej cov kav dej los ntawm6 "mus rau 72" diamnrog phab ntsa thicknesses mus txog80 hlithiab ntev mus txog70 m, txo cov kev xav tau ntawm thaj chaw splicing. Qib 3 yog qhov kev xaiv zoo tshaj raukev tsim kho choj, chaw nres nkoj, cov qauv hauv hiav txwv, cov tsev siab - nce siab, thiab cov haujlwm uas muaj cov av nyuajqhov twg siab tshaj plaws thiab durability yuav tsum tau. Nws kev sib xyaw ua ke ntawmHigh structural kev ncaj ncees, zoo heev toughness, thiab corrosion kuj xaivua rau nws yog qib hwm hauv ASTM A252 tus qauv rau kev thov kev siv engineering feem ntau.
