ASTM A252 Kauv Welded Steel Pipe (SSAW)
Lub ntsiab lus tseem ceeb
ASTM A252 Kauv Submerged Arc Welded (SSAW) steel yeeb nkabyog acarbon steel yeeb nkabtsim tshwj xeeb raukev siv lub hauv paus thiab kev txhawb nqa. Tsis zoo li cov kav dej siab (xws li API 5L), cov kav dej no ua haujlwm zoo liruaj khov load- nqa cov tswv cuablos yog raws li lub plhaub rau cam khwb cia-hauv- tso cov pob zeb ua vaj tse .
SSAW manufacturing txheej txheem tso cai rauloj - txoj kab uas hlalos tsim kev lag luam, ua ASTM A252 kauv welded yeeb nkab yog qhov kev xaiv zoo raumarine structures, choj foundations, siab -cov tsev nce siab, thiab av reclamation tej yaam num .
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 | Qib 1, Qib 2, Qib 3- muaj peb theem zog |
| SSAW | Kauv Submerged Arc Vuam - ob npaug -sab vuam nrog muab tub lim hlau; weld seam khiav tsis tu ncua nyob rau hauv ib tug kauv raws cov yeeb nkab ntev |
Ntsiab Specifications
| Yam ntxwv | Kev piav qhia |
|---|---|
| Txuj | ASTM A252 / A252M - "Standard Specification rau Welded thiab Seamless Steel Pipes" |
| Kev tsim khoom | Spiral Submerged Arc Vuam (SSAW) - ob npaug -sab tsis siv neeg vuam |
| Qib | Qib 1, Qib 2, Qib 3– Qib 2 feem ntau yog |
| Size Range (SSAW) | 219mm txog 4064mm(8 "mus rau 160") OD |
| Phab ntsa Thickness | 3.2mm txog 60mm(ntau ntau 6-25.4mm) |
| Ntev | 6 m txog 24 m txheem; mus txog 32 m muaj |
| Xaus Xaus | Plain xaus, beveled xaus (30℃bevel), threaded |
Chemical Composition (Txhua Qib)
ASTM A252 qhia tshwj xeeb tshaj yog txwv rau phosphorus. Tag nrho peb qib muaj tib qhov txwv tsis pub muaj:
| Element | Ntau tshaj % |
|---|---|
| Cov pa roj carbon (C) | 0.26% (tus qauv, tsis muaj cai) |
| Manganese (Mn) | 1.60% (tseem, tsis muaj cai) |
| Silicon (Si) | 0.45% (tus qauv, tsis muaj cai) |
| Phosphorus (P) | 0.050%(yuav tsum tau) |
| Sulfur (S) | 0.030% (tus nqi) |
Lus Cim: Tus qauv tsuas yog tswj hwm qhov siab tshaj plaws phosphorus. Cov tshuaj muaj pes tsawg leeg muaj txiaj ntsig tau pom yog ib txwm los ntawm cov ntaub ntawv tsim khoom.
Mechanical Properties Sib piv
| Qib | Yield zog (min) | Tensile zog (min) | Elongation (min) | Lub zog vs. Qib 1 |
|---|---|---|---|---|
| Qib 1 | 205 MPa (30,000 psi) | 345 MPa (50,000 psi) | 30% | Lub hauv paus |
| Qib 2 | 240 MPa (35,000 psi) | 415 MPa (60,000 psi) | 25% | +17% tawm |
| Qib 3 | 310 MPa (45,000 psi) | 455 MPa (66,000 psi) | 20% | +51% tawm |
Qhov chaw:
Dimensional Tolerances
| Parameter | Ua siab ntev |
|---|---|
| Sab nraud txoj kab uas hla (OD Tsawg dua los yog sib npaug rau 508mm) | ± 1% lossis ± 1.0mm (qhov twg ntau dua) |
| Sab nraud txoj kab uas hla (OD> 508mm) | ± 1% lossis ± 4.0mm (qhov twg ntau dua) |
| Phab ntsa Thickness | +15% / -12.5% ntawm nominal |
| Qhov hnyav | +15% / -5% ntawm qhov hnyav theoretical |
| Kev ncaj | Tsawg dua lossis sib npaug li 0.1% ntawm tag nrho qhov ntev |
Hom Loj Muaj (SSAW):
| 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 |
SSAW Manufacturing txheej txheem
Kauv welded kav hauv qab ASTM A252 yog tsim los siv cov txheej txheem hauv qab no:
| Kauj ruam | Kev piav qhia |
|---|---|
| 1. Kev npaj cov khoom nyoos | Steel coils ntsib ASTM A252 chemistry cov cai yuav tsum tau ua theem, trimmed, thiab npaj |
| 2. Ntug Kev Npaj | Cov npoo npoo yog milled rau kev vuam zoo |
| 3. Kauv sib sau | Hlau sawb txuas ntxiv tsim rau hauv cov duab cylindrical ntawm lub kaum ntse ntse tshwj xeeb |
| 4. Submerged Arc Vuam | Ob -sab tsis siv neeg submerged arc vuam(sab hauv thiab sab nraud) tsim cov kauv seam nrog rau qhov tob tob dua lossis sib npaug li 1.5mm |
| 5. Weld NDT | 100% ultrasonic tsis siv neeg qhov tsis pom kevntawm weld seam |
| 6. Kev Ntsuas Hydrostatic | Txhua cov yeeb nkab tau sim ntawm 2 × ua haujlwm siab rau ntau dua lossis sib npaug li 15 vib nas this |
| 7. Kev ua tiav tiav | Beveled kawg (30℃kaum sab xis) rau kev sib tsoo |
| 8. Txheej | Los tiv thaiv -corrosion txheej raws li xav tau (epoxy, 3LPE, thee tar epoxy) |
Kev Ntsuas & Kev Ntsuam Xyuas Cov Cai
| Hom kev xeem | Kev xav tau | Sau ntawv |
|---|---|---|
| Tshuaj ntsuam xyuas | Rau qhov kub ntau | Phosphorus txwv txwv |
| Tensile Test | Rau ntau | Txheeb xyuas qhov tawm los thiab lub zog tensile |
| 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 | 2 × ua haujlwm siab, Ntau dua lossis sib npaug li 15 vib nas this |
| Kev soj ntsuam ultrasonic (UT) | 100% ntawm weld seam | Nruam tsis siv neeg qhov tsis pom kev |
| Dimensional soj ntsuam | 100% | Raws li ASTM A252 tolerances |
| Mill Test Certificate | EN 10204 Hom 3.1B | Muab tag nrho cov kev xeem |
Daim ntawv thov
ASTM A252 kauv welded kav yog siv rau hauv kev thov hauv paus daim ntawv thov:
| Daim ntawv thov | Kev piav qhia |
|---|---|
| Marine Structures | Ports, wharves, docks, seawalls, offshore platforms |
| Choj Foundations | Pier thiab abutment kev them nyiaj yug rau hla - tus choj dej / hiav txwv |
| High-Rise Building Foundations | Core tube pawg hauv paus rau skyscrapers (ib pawg muaj peev xwm Ntau dua lossis sib npaug rau 8000kN) |
| Av Reclamation | Ntug hiav txwv embankments, reclamation bulkheads |
| Industrial Plant Foundations | Heavy equipment foundation pawg |
| Tej hauj lwm ib ntus | Kev txhawb nqa lub hauv paus, kev tsim kho platforms |
| Transmission Tower Foundations | Av corrosion aav nrog 3PE txheej |
Qib Qib Kev Qhia
| Qib | Yield zog | Daim ntawv thov |
|---|---|---|
| Qib 1 | 205 MPa (30 ksi) | Lub teeb -load daim ntawv thov, cov av zoo, cov qauv ib ntus |
| Qib 2 | 240 MPa (35 ksi) | Feem ntau- nruab nrab- cov tsev nce, choj hauv paus, piling dav |
| Qib 3 | 310 MPa (45 ksi) | Hnyav-load daim ntawv thov, txuas hniav loj, cov chaw sab nrauv, thaj tsam seismic |
Rau feem ntau daim ntawv thov hauv paus, Qib 2 yog qhov kev xaiv tus qauv.
Txheej txheej xaiv
| Txheej hom | Zoo tshaj rau | Ntsiab nta |
|---|---|---|
| 3LPE (3-txheej polyethylene) | faus pawg | 50+ xyoo kev pab cuam lub neej, kev tiv thaiv corrosion zoo heev |
| FBE (Fusion Bonded Epoxy) | Marine / txaws cheeb tsam | 30+ xyoo kev pab cuam lub neej, muaj zog adhesion |
| Coal Tar Epoxy | Marine ib puag ncig | Heavy-lub luag haujlwm tiv thaiv |
| Pob zeb hnyav txheej (CWC) | Offshore / subsea | Tsis zoo buoyancy, mechanical tiv thaiv |
| Epoxy Resin / iav Flake | Corrosive ib puag ncig | Qhuav zaj duab xis Ntau dua los yog sib npaug rau 300μm rau ntsev corrosion kuj |
| Bitumen txheej | Kev pabcuam faus | Tus nqi -kev tiv thaiv zoo |
| Kub-dip Galvanized | Saum - hauv av | Lifespan 20+ xyoo nyob rau hauv ib puag ncig offshore |
SSAW vs. LSAW vs. ERW Sib piv rau ASTM A252
| Yam | SSAW (kauv) | LSAW (Longitudinal) | ERW |
|---|---|---|---|
| Tus nqi (ib ton) | qis tshaj(100% kev siv phaj) | Siab tshaj | Nruab nrab |
| OD Ntau | 219-4064 hli (8-160") | 406-1626 hli (16-64 ") | Mus txog 610 mm (24 ") |
| Phab ntsa Thickness | Txog li 60 mm | Mus txog 63.5 mm | Txwv tsis pub |
| Ntau lawm ceev | Fast (nruam kauv vuam) | Slow (JCOE / UOE tsim) | Nruab nrab |
| Daim ntawv thov | Chaw nres nkoj, av reclamation, loj - txoj kab uas hla | Heavy-phab ntsa, siab- lub zog piling | Me me txoj kab uas hla |
| Axial zog | Spiral weld disperses stress -15-20% siab duatshaj ncaj seam | Zoo | Txuj |
Qhov chaw:
Qhov zoo ntawm SSAW rau ASTM A252 Piling
| Qhov zoo | Kev piav qhia |
|---|---|
| Loj Loj Muaj peev xwm | SSAW tsim cov kav dej mus txog 4000mm OD - zoo tagnrho rau loj - txoj kab uas hla |
| Tus nqi -Cov | Kev lag luam feem ntau rau cov kab loj loj; 35% tus nqi qis dua seamless, 15% qis dua Qib 3 |
| Superior Axial zog | Spiral weld seam disperses kev ntxhov siab -15-20% siab dua axial compressive zogtshaj ncaj seam |
| Ntev ntev | Txog li 32m ntev txo cov kev xav tau ntawm kev sib tshuam |
| High Weld Integrity | 100% UT kev tshuaj xyuas ntawm weld seam; ob -sab vuam ua kom muaj kev nkag mus tag nrho |
| Kev Ntsuas Hydrostatic | Txhua cov yeeb nkab tau sim ntawm 2 × kev ua haujlwm siab - txawv ntawm ASTM A252 uas tsis ua raws li qhov no |
| Kev xaiv ntau txheej txheej | FBE, 3LPE, thee tar epoxy, CWC rau marine / corrosive ib puag ncig |
Kev txiav txim siab tseem ceeb
1. ASTM A252 yog rau Piling, Tsis Siab Siab
ASTM A252 tshwj xeeb raukev siv lub hauv paus piling
Cov kav dej yog ntim nrog pob zeb, tsis siv rau kev xa tawm cov kua
Kev ntsuam xyuas hydrostatic yog xaiv tau rau ASTM A252, tab sis feem ntau cov tuam ntxhab muab nws
2. Qib 2 yog qhov kev xaiv Standard
Qib 2yog qib uas feem ntau teev tseg rau kev siv piling
Qib 1 yog rau lub teeb -load daim ntawv thov; Qib 3 rau hnyav-load, xav tau tej yam kev mob
3. SSAW Loj Txwv
SSAW manufacturing rau ASTM A252 feem ntau muaj los ntawm8" rau 160" OD
Cov kab me me (hauv qab 8 ") feem ntau yog tsim los ntawm ERW txoj kev
4. Kev tiv thaiv corrosion rau Marine Environments
Rau cov qauv marine, qhiaepoxy resin txheej (qhuav zaj duab xis Ntau dua lossis sib npaug rau 300μm)los yog3 LPE
Rau offshore, xav txogpob zeb hnyav txheej (CWC)rau qhov tsis zoo buoyancy
5. Kev npaj kawg rau Field Vuam
Beveled kawg (30℃bevel)standard for field welding
Hauv paus ntsej muag: 1.6 ± 0.8mm
Tsav tsheb khau muaj rau kev tsav tsheb nyuaj
6. Thib peb-Kev soj ntsuam tog
Muaj cov kev pabcuam tshuaj xyuas suav nrog SGS, BV, Lloyds
7. Mill Test Certificate
Feem ntau muab raws liEN 10204 Hom 3.1Bnrog tag nrho cov kev xeem
Cov ntsiab lus
ASTM A252 Kauv Submerged Arc Welded (SSAW) steel yeeb nkabyog tus qauv specification rau loj - txoj kab uas hla steel yeeb piles siv nyob rau hauv lub hauv paus thiab marine kev tsim kho. Nrog rau qib peb lub zog (Qib 1: 205 MPa, Qib 2: 240 MPa, Qib 3: 310 MPa) thiab qhov loj txog li 4000mm OD, cov kav dej no yog qhov kev xaiv zoo tshaj plaws rau cov chaw nres nkoj, txuas hniav, siab - nce vaj tse, thiab av reclamation tej yaam num.
Cov yam ntxwv tseem ceeb:
Khoom txheemASTM A252 - Asmeskas tus qauv rau cov yeeb nkab steel
Qib: Qib 1 (30 ksi),Qib 2 (35 ksi)- Feem ntau, Qib 3 (45 ksi)
SSAW manufacturingtsim cov kav dej los ntawm8" rau 160" ODnrog phab ntsa thickness mus txog60 mm
Ob -sab vuamtsim ib lub siab -zoo weld nugget
100% ultrasonic kuajntawm weld seam kom zoo
Kev ntsuam xyuas hydrostaticntawm 2 × kev ua haujlwm siab (tus qauv tsim khoom)
Kauv weld tsimmuab 15-20% siab dua axial compressive zog dua ncaj seam
Tus nqi- zoo- kev lag luam tshaj plaws rau cov ntawv loj - txoj kab uas hla piling
Cov ntawv thov uas muaj xws li:
Marine structures (chaw nres nkoj, wharves, docks, seawalls)
Choj foundations thiab pier kev txhawb nqa
High-nce lub hauv paus tob
Av reclamation thiab ntug hiav txwv embankments
Industrial cog foundations thiab ua haujlwm ib ntus
Thaum ordering, qhia:ASTM A252, Qib [1/2/3], SSAW (Spiral Submerged Arc Welded), Loj (OD x WT), Ntev, Qhov Kawg Finish (plain / beveled), Txheej Txheej (FBE / 3LPE / epoxy), thiab Mill Test Certificate rau EN 10204 Hom 3.1B. Rau feem ntau cov kev siv piling,Qib 2yog qhov pom zoo default.
