BS 4360 Qib 43 Ob chav -Sided Submerged Arc Vuam (DSAW) Hlau Yeeb Nkab
✅ Cov ntsiab lus tseem ceeb
BS 4360 Qib 43 DSAW (Double-Sided Submerged Arc Welded) steel yeeb nkabyog cov khoom siv steel qauv uas sib xyaw ua ke tam sim no - rho tawm British Standard cov ntaub ntawv qib nrog kev ruaj khov, siab - kev ncaj ncees vuam txheej txheem . Thaum BS 4360 tau hloov pauv los ntawm EN 10025 (nrog rau qhov sib npaug niaj hnubS275 JR), Qib 43 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 thov kua dej.
📋 Kev piav qhia lub npe
| Ib feem | Lub ntsiab lus |
|---|---|
| BS | British Standard |
| 4360 | Qhov tshem tawm British Standard specification rau weldable structural steels |
| Qib 43 | Ib hom carbon steel qib nrog qhov tsawg kawg nkaus tawm lub zog ntawm kwv yees li 275 MPa (40 ksi) - qhov sib npaug niaj hnub yogS275 JR |
| 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 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 |
|---|---|
| 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
📊 Cov ntsiab lus tseem ceeb
| Yam ntxwv | Kev piav qhia |
|---|---|
| Standard (Keeb kwm) | BS 4360 (tshem tawm, hloov los ntawm EN 10025) |
| Niaj hnub sib npaug | S275 JR(EN 10025-2) - Yam tsawg kawg nkaus yield zog 275 MPa |
| Qib | Qib 43 - yam tsawg kawg nkaus tawm lub zog kwv yees li 275 MPa (40 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 & Mechanical Properties
Lus Cim: BS 4360 Qib 43 yog qib steel qauv. Nws cov tshuaj lom neeg thiab cov khoom siv kho tshuab yog sib npaug rau cov qauv niaj hnub noEN 10025 S275 JR .
| Element | Ntau tshaj % |
|---|---|
| Cov pa roj carbon (C) | 0.21-0.25% |
| Manganese (Mn) | 1.50% max |
| Silicon (Si) | 0.05-0.40% |
| Phosphorus (P) | 0.040-0.050% max |
| Sulfur (S) | 0.040-0.050% max |
| Khoom | Yam tsawg kawg nkaus |
|---|---|
| Yield Strength (t Tsawg dua lossis sib npaug li 16mm) | 275 MPa rau |
| Tensile zog | 410-560 MPa |
| Elongation | 20-23% |
| Charpy Impact | 27 J ntawm +20℃(JR sib npaug) |
📏 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 Availability by Diameter (X52 qib piv txwv – zoo sib xws rau Qib 43):
| 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 |
🧪 Test & Inspection Requirements
| 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 (feem ntau 27J ntawm +20℃rau JR sib npaug) |
| Hydrostatic Test | Raws li qhov project / tus qauv | Rau kev siv siab |
| NDT (Ultrasonic/X{0}}ray) | Weld seam soj ntsuam | Txuj kev xyaum rau DSAW |
| Mill Test Certificate | EN 10204 Hom 3.1B | Muab tag nrho cov kev xeem |
🏭 Common Applications
| Daim ntawv thov | Kev piav qhia |
|---|---|
| Structure Engineering | Lub tsev thav duab, kab, trusses rau siab -cov tsev nce siab, chaw ntau pob, chaw ua yeeb yam |
| Piling Foundations | Thauj khoom-cov kabmob rau cov tsev thiab cov qauv |
| Kev tsim kho choj | Cov tswv cuab, kev txhawb nqa, cov neeg taug kev txuas hniav |
| Offshore Projects | Marine structures, chaw nres nkoj |
| Tsawg-Hloov Fluid Transmission | Dej, roj, thiab roj kav dej (tsis yog- tseem ceeb) |
| Infrastructure Projects | Qhov kev txhawb nqa, khaws cov phab ntsa, cov qauv kev loj |
📝 Cov ntsiab lus 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 43 yogS275 JR(EN 10025-2). Rau cov haujlwm tshiab, qhia txog S275JR raug pom zoo.
2. Qib 43 vs. Qib 50
| Qib | Yield zog | Niaj hnub sib npaug |
|---|---|---|
| Qib 43 | ~ 275 MPa | S275 JR |
| Qib 50 | ~ 355 MPa | S355JR / S355J2H |
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
Qhov kev xaiv "Qib 43" tsis qhia qhov ntsuas qhov ntsuas kub. Rau daim ntawv thov yuav tsum tau guaranteed toughness:
S275 JR– 27 J ntawm +20 degree
S275J0- 27 J ntawm 0 degree
S275J2-27 J ntawm -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 feem ntau daim ntawv thov
Beveled xaus- rau thaj 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 43 Ob chav -Sided Submerged Arc Welded (DSAW) steel yeeb nkabyog ib yam khoom txheem rau loj - txoj kab uas hla structural thiab qis - cov ntaub ntawv siv kua . Thaum tus txheej txheem BS 4360 tau raug tshem tawm, Qib 43 tseem raug lees paub dav dav, nrog rau nws qhov sib npaug niaj hnub.EN 10025 S275 JR .
Cov yam ntxwv tseem ceeb:
Qib 43muaj yam tsawg kawg nkaus yield zog ntawm kwv yees li275 MPa rau(40 hli)
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:
Structural engineering (tsev thav duab, kab, trusses)
Piling foundations thiab kev tsim choj
Offshore tej yaam num thiab marine lug
Tsawg- cov kua xa tawm siab (dej, roj, roj)
Infrastructure tej yaam num (tunnels, tuav phab ntsa)
Thaum ordering, qhia:BS 4360 Qib 43 (los yog niaj hnub sib npaug EN 10025 S275JR), DSAW (Ob chav-Sided Submerged Arc Welded), Loj (OD x WT), Length, End Finish (plain/beveled), thiab Coating Requirements. Rau tej yaam num tshiab,EN 10025 S275 JRyog qhov pom zoo cov khoom specification.
