BS 4360 Qib 50 Ob chav -Sided Submerged Arc Vuam (DSAW) Hlau Yeeb Nkab
Lub ntsiab lus tseem ceeb
BS 4360 Qib 50 DSAW (Double-Sided Submerged Arc Welded) steel yeeb nkabyog lub siab -cov khoom siv steel hlau uas ua ke nrog tam sim no- rho tawm British Standard cov ntaub ntawv qib nrog kev ruaj khov, siab - kev ncaj ncees vuam txheej txheem. Qib 50 yog qhov siab dua - lub zog sib piv rau Qib 43, nrog rau qhov tsawg kawg nkaus lub zog ntawm kwv yees li355 MPa (51 ksi), ua rau nws tsim nyog rau kev thov cov qauv siv xws li siab- cov tsev nce siab, txuas hniav, offshore platforms, thiab cov haujlwm hnyav engineering.
Thaum BS 4360 tau hloov pauv los ntawm EN 10025 (nrog rau qhov sib npaug niaj hnubS355JR/S355J2), Qib 50 tseem yog qhov kev lees paub dav dav hauv cov haujlwm qub txeeg qub teg thiab hauv thaj chaw uas muaj kev paub txog tus qauv Askiv tseem nyob. DSAW yog txoj kev tsim khoom zoo tshaj plaws rau qhov loj - txoj kab uas hla, tuab - cov kav dej phab ntsa siv hauv kev xav tau cov qauv thiab qis - cov ntawv siv kua dej.
Lub npe piav qhia
| Ib feem | Lub ntsiab lus |
|---|---|
| BS | British Standard |
| 4360 | Qhov tshem tawm British Standard specification rau weldable structural steels |
| Qib 50 | Lub siab -lub zog carbon- qib manganese steel nrog qhov tsawg kawg nkaus tawm lub zog ntawm kwv yees li 355 MPa (51 ksi) - qhov sib npaug niaj hnub no yogS355JR/S355J2 |
| 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; cais welds noj ib feem ntawm ib leeg ua ib qho siab - zoo weld nugget |
DSAW Manufacturing Process
Ob chav -Sided Submerged Arc Vuam yog ib qho kev ua haujlwm siab - siv feem ntau rau cov kav loj - txoj kab uas hla steel:
Txheej txheem piav qhia
Vuam 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 sib cais welds noj ib feem ntawm lwm yam, ua rau aib leeg siab -zoo weld nugget
Txoj kev tsim
| Txoj kev | Kev piav qhia |
|---|---|
| JCOE / JCO | Progressive J-C-O cov kauj ruam (J-shape → C-shape → O-puab), nthuav dav tom qab vuam; Qhov no yog txoj hauv kev tshaj plaws rau LSAW / DSAW kav |
| UAE | Phaj nias rau hauv U-puab, ces O-puab, nthuav dav tom qab vuam |
Txias Expansion
Cov yeeb nkab yuav raug nthuav mus txog 1.5% kom tau txais OD qhov ntev kawg
Cov txheej txheem no tuaj yeem ua rau muaj qhov nce ntawm cov khoom muaj zog
Kev nthuav dav feem ntau yog siv nyob rau hauv UOE mills vim qhov xav tau kom rov qab tau lub zog poob thaum lub sij hawm tsim
Ntsiab Specifications
| Yam ntxwv | Kev piav qhia |
|---|---|
| Standard (Keeb kwm) | BS 4360 (tshem tawm, hloov los ntawm EN 10025) |
| Niaj hnub sib npaug | S355JR / S355J2(EN 10025-2) - Yam tsawg kawg nkaus yield zog 355 MPa |
| Qib | Qib 50 - yam tsawg kawg nkaus tawm lub zog kwv yees li 355 MPa (51 ksi) |
| Kev tsim khoom | DSAW (Ob chav -Sided Submerged Arc Vuam) / LSAW (Longitudinal Submerged Arc Vuam) |
| Txoj kev tsim | JCOE los yog UOE |
| Qhov Loj | 16" to 72" OD(406mm txog 1829mm) |
| Phab ntsa Thickness | 6.0mm txog 40mm (txog 60mm rau kev siv piling) |
| Ntev | 6 m txog 12.3 m txheem; mus txog 18 m muaj |
Chemical Composition (Qib 50D)
* Lus Cim: BS 4360 Qib 50 yog qib steel qauv. Subgrades muaj xws li 50A, 50B, 50C, thiab 50D, nrog rau qhov sib txawv ntawm qhov yuav tsum tau ua. Qib 50D muaj qhov nruj tshaj plaws qis-kub toughness.*
| Element | Ntau tshaj % | Sau ntawv |
|---|---|---|
| Cov pa roj carbon (C) | 0.20% | Tsawg carbon rau zoo weldability |
| Manganese (Mn) | 1.50% | Muab lub zog thiab hardenability |
| Silicon (Si) | 0.50% | Deoxidizer |
| Phosphorus (P) | 0.040% | Tswj rau weldability |
| Sulfur (S) | 0.040% | Tswj kom toughness |
| Vanadium (V) | 0.003-0.150% | Micro-Alloying rau cov nplej refinement |
| Niobium (Nb) | 0.003-0.100% | Micro{0}} alloying rau lub zog |
Mechanical Properties
| Khoom | Qib 50 tus nqi | Sau ntawv |
|---|---|---|
| Yield zog (min) | 345-355 MPa(50-51 hli) | Ntawm thickness Tsawg dua los yog sib npaug li 16 hli |
| Tensile zog (min) | 450-480 MPa(65-70 hli) | Nws txawv ntawm subgrade |
| Elongation | 20-24% | Nyob ntawm thickness |
| Charpy Impact | 27j0 qib(Qib 50C/50D) | Qib 50D kuaj ntawm -15℃lossis -20 degree |
Qib 50 Subgrades Sib piv
| Subgrade | Yield zog (min) | Tensile zog (min) | Impact Test Temperature | Daim ntawv thov |
|---|---|---|---|---|
| 50A | 345 MPa rau | 450 MPa | Tsis xav tau | Kev tsim qauv dav dav, tsis yog - tseem ceeb |
| 50B | 345 MPa rau | 450 MPa | Tsis tau teev tseg | General qauv |
| 50C | 345 MPa rau | 450 MPa | 27j0 qib | Sab nraum cov qauv nyob rau hauv temperate climates |
| 50D | 345 MPa rau | 480 MPa rau | 27 J ntawm -15℃rau -20 degree | Cov huab cua txias, thov thov |
* Qib 50D muaj qhov toughness siab tshaj plaws, haum rau qis -kub thiab offshore daim ntaub ntawv.*
Dimensional Specifications
| Parameter | Ntau Yam / Tolerance |
|---|---|
| Sab nraud txoj kab uas hla | 16 "mus rau 72"(406mm txog 1829mm) |
| Phab ntsa Thickness | 6.0mm txog 40mm (txog 60mm rau piling) |
| Txoj kab uas hla Tolerance | ± 0.75% ntawm OD (tseem ceeb) |
| Phab ntsa Thickness kam rau ua | +15% / -12.5% ntawm nominal (tus qauv) |
| Ntev | 6 m txog 12.3 m txheem; mus txog 18 m muaj |
Phab ntsa Thickness Muaj los ntawm Diameter:
| 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 |
Qhov chaw:
Kev Ntsuas & Kev Ntsuam Xyuas Cov Cai
| Hom kev xeem | Kev xav tau | Sau ntawv |
|---|---|---|
| Tshuaj ntsuam xyuas | Rau qhov kub ntau | Txheeb xyuas qhov txwv tsis pub muaj |
| 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 |
| Charpy Impact Test | Thaum tau teev tseg | Rau qis- daim ntawv thov kub (27J ntawm 0℃txog -20 degree) |
| Hydrostatic Test | Raws li qhov project / tus qauv | Rau kev siv siab |
| NDT (Ultrasonic/X{0}}ray) | Weld seam soj ntsuam | Standard xyaum rau DSAW |
| Mill Test Certificate | EN 10204 Hom 3.1B | Muab tag nrho cov kev xeem |
Cov ntawv thov siv
| Daim ntawv thov | Kev piav qhia |
|---|---|
| High-Rise Building Construction | Cov kab, kab teeb, trusses rau cov qauv siab |
| Bridge Engineering | Cov tswv cuab cov qauv, kev txhawb nqa, cov choj loj |
| Offshore Platforms | Marine structures, roj/gas platforms |
| Piling Foundations | Load-cov kabmob rau cov qauv hnyav |
| Heavy Engineering | Crane booms, excavator Cheebtsam, hnyav machinery |
| Cua Turbine Ntauwd | Loj - txoj kab nruab nrab txhawb nqa |
| Tsawg-Hloov Fluid Transmission | Dej, roj, thiab roj kav dej |
| Infrastructure Projects | Tunnels, tuav phab ntsa, txoj kev loj |
Niaj hnub nimno Equivalent Standards
BS 4360 tau raug tshem tawm thiab hloov los ntawm EN 10025. Qhov sib npaug niaj hnub ncaj qha ntawm Qib 50 yog:
| BS 4360 Qib | Niaj hnub nimno EN sib npaug | Cov yam ntxwv tseem ceeb |
|---|---|---|
| 50A | S355 JR | 27 J ntawm +20 degree |
| 50B | S355J0 | 27j0 qib |
| 50C | S355J2 | 27 J ntawm -20 degree |
| 50D | S355K2 | 40 J ntawm -20℃(siab dua toughness) |
International sib npaug:
ASTM A572 Qib 50(US standard)
EN 10025 S355JR / S355J2(Tebchaws Europe)
TSW 52-3(German standard, keeb kwm)
GB/T 1591 Q355B(Suav standard)
Kev txiav txim siab tseem ceeb
1. Cov xwm txheej txheem
BS 4360 uatshem tawm thiab hloov los ntawm EN 10025. Qhov ncaj qha niaj hnub sib npaug ntawm Qib 50 yogS355JR/S355J2(EN 10025-2). Rau cov haujlwm tshiab, qhia txog S355JR lossis S355J2 raug pom zoo.
2. Qib 43 vs. Qib 50
| Qib | Yield zog | Niaj hnub sib npaug |
|---|---|---|
| Qib 43 | ~ 275 MPa (40 ksi) | S275 JR |
| Qib 50 | ~ 355 MPa (51 ksi) | S355JR / S355J2 |
Qib 50 muaj kwv yees li29% siab dua yield zogdua qib 43.
3. Khoom Txheem
Thaum BS 4360 txhais covqib khoom siv, cov khoom tiav DSAW yeeb nkab feem ntau yog tsim los rau cov qauv khoom xws li:
TS EN 10219(txias-ua welded structural hollow seem) - rau cov qauv siv
TS EN 10217(welded raj rau lub hom phiaj siab) - rau kev siv siab
ASTM A252, ASTM A252(pipe piles) - rau kev siv piling
4. Cov khoom cuam tshuam los ntawm Subgrade
Qib 50 kev xaiv suav nrog ntau qhov kev kawm subgrades nrog cov kev xeem sib txawv:
50A: Tsis muaj kev cuam tshuam kev sim - cov qauv siv dav dav, kev siv sab hauv tsev
50B: Cov kev txwv cuam tshuam
50C: 27j0 qib- haum rau huab cua sab nraum zoov
50D: 27 J ntawm -15℃rau -20 degree- haum rau huab cua txias, offshore, thiab thov kev thov
Rau cov ntawv thov uas xav tau kev lees paub qis -kub toughness, qhia meejQib 50C(0 degree) los yogQib 50D(-20 degree).
5. Txheej txheej xaiv
DSAW yeeb nkab tuaj yeem muab nrog ntau txheej txheej rau kev tiv thaiv corrosion:
FBE (Fusion Bonded Epoxy)- rau faus pipelines
3LPE (3-txheej polyethylene)- rau daim ntawv thov faus
Coal Tar Epoxy- rau marine ib puag ncig
Varnish/Anti- xeb roj- kev tiv thaiv ib ntus
Bitumen txheej- rau kev pabcuam faus
Galvanizing- rau kev siv sab nraum zoov
6. Xaus tiav
Plain xaus- txheem rau ntau daim ntawv thov
Beveled xaus- rau qhov chaw vuam (30℃bevel kaum sab xis)
Xov xaus- rau kev sib txuas tshuab
7. Thib peb-Kev soj ntsuam tog
Muaj cov kev pabcuam tshuaj xyuas suav nrog SGS, BV, Lloyds, TUV.
Cov ntsiab lus
BS 4360 Qib 50 Ob chav -Sided Submerged Arc Welded (DSAW) steel yeeb nkabyog ib qho khoom siv siab - lub zog loj rau - txoj kab uas hla cov qauv thiab xav tau kev siv engineering. Thaum tus txheej txheem BS 4360 tau raug tshem tawm, Qib 50 tseem muaj kev lees paub dav dav, nrog rau nws qhov sib npaug niaj hnub.EN 10025 S355JR / S355J2.
Cov yam ntxwv tseem ceeb:
Qib 50muaj yam tsawg kawg nkaus yield zog ntawm kwv yees li355 MPa (51 ksi)- 29% siab dua Qib 43
Subgrade xaiv(50A, 50B, 50C, 50D) tso cai rau xaiv qhov tsim nyog cuam tshuam rau qhov chaw pabcuam
DSAW manufacturingtsim cov kav dej los ntawm16" to 72" ODnrog phab ntsa thickness mus txog40 mm(60mm rau piling)
Ob -sab vuamtsim ib lub siab -zoo weld nugget
JCOE los yog UOE tsimcov txheej txheem kom paub meej qhov tseeb qhov tseeb
Txias expansion(txog 1.5%) tuaj yeem siv tau, uas tuaj yeem ua kom muaj zog tawm los
Cov ntawv thov uas muaj xws li:
High-kev tsim kho vaj tse thiab choj engineering
Offshore platforms thiab marine qauv
Heavy engineering thiab cua turbine yees
Piling foundations rau cov qauv hnyav
Tsawg- kis tau tus mob (dej, roj, roj)
Thaum ordering, qhia:BS 4360 Qib 50 [Subgrade: A/B/C/D] (los yog niaj hnub sib npaug EN 10025 S355JR/S355J2), DSAW (Ob chav-Sided Submerged Arc Welded), Loj (OD x WT), Length, Endbe Finish (plain.
Rau tej yaam num tshiab,EN 10025 S355JR / S355J2yog qhov pom zoo cov khoom specification. Rau cov ntawv thov uas xav tau kev lees paub qis -kub toughness, qhia meejQib 50C(0 degree) los yogQib 50D(-20 degree).
