GB/T 700-2006 Qib B Ob Chav Sided Submerged Arc Vuam (DSAW) Hlau Yeeb Nkab
Lub ntsiab lus tseem ceeb
GB/T 700-2006 Qib B (Q235B) Ob Chav Sided Submerged Arc Vuam (DSAW) steel yeeb nkabyog cov pa roj carbon zoo tshaj plaws steel yeeb nkab qib hauv Suav teb, dav siv rau kev tsim kho, kev txhawb nqa cov qauv, thiab qis - cov kua dej xa mus. Qhov kev xaiv "Qib B" lav qhov cuam tshuam yam tsawg kawg nkaus toughness ntawm27 J ntawm chav tsev kub (+20 degree), paub qhov txawv ntawm Qib A uas tsis muaj kev cuam tshuam.
DSAW (tseem hu ua LSAW - Longitudinal Submerged Arc Welding) txheej txheem yog qhov siab - vuam txoj kev ncaj ncees uas siv ob sab hauv thiab sab nraud welds, feem ntau hauv cov txheej txheem sib cais, tsim ib qhoib leeg siab -zoo weld nugget. Cov txheej txheem no yog tshwj xeeb tshaj yog zoo- haum rau loj- txoj kab uas hla, tuab- phab ntsa kav siv nyob rau hauv structural, piling, thiab tsawg- cov ntaub ntawv siv kua.
Lub npe piav qhia
| Ib feem | Lub ntsiab lus |
|---|---|
| GB / T | Suav teb tus qauv (Guobiao / Tuijian) |
| 700-2006 | Tus naj npawb rau Carbon Structural Steels (2006 tsab) |
| Qib B | Qib zoo –guarantees cuam tshuam toughness ntawm 27 J ntawm +20 degree; Kev tswj nruj dua ntawm S (0.045%) dua qib A (0.050%) |
| 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 |
Cov ntsiab lus tseem ceeb
| Yam ntxwv | Kev piav qhia |
|---|---|
| Khoom Txheem | GB/T 700-2006- Carbon Structural Steels (tam sim no version; GB / T 700-2019 yog tshiab dua) |
| Qib Steel | Q235B- Yam tsawg kawg nkaus yield zog 235 MPa (rau thickness Tsawg dua los yog sib npaug rau 16mm) |
| Qib zoo | Qib B- Muaj kev cuam tshuam toughness ntawm chav tsev kub (27 J ntawm +20 degree); nruj dua S txwv (0.045%) |
| 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) |
| Qhov Loj | 219mm txog 1829mm(8 "mus rau 72") OD - raug rau DSAW |
| Phab ntsa Thickness | 5mm txog 40mm (txog 50mm rau kev siv piling) |
| Ntev | 6 m txog 12.3 m txheem; mus txog 18 m muaj |
Chemical Composition (GB/T 700-2006 Qib B)
| Lub ntsiab | Qhov siab tshaj % | Sau ntawv |
|---|---|---|
| Cov pa roj carbon (C) | 0.20% | qis dua Qib A (0.22%); zoo dua weldability |
| Silicon (Si) | 0.35% | Deoxidizer |
| Manganese (Mn) | 1.40% | Muab lub zog |
| Phosphorus (P) | 0.045% | Ib yam li Qib A; tswj rau weldability |
| Sulfur (S) | 0.045% | Tighter dua qib A (0.050%); txhim kho toughness |
Lus Cim: Qib B muaj cov ntsiab lus qis dua (0.20% vs . 0.22%) thiab tswj cov sulfur nruj dua (0.045% vs . 0.050}%) dua qib A, pab txhawb kom zoo dua weldability thiab cuam tshuam toughness.
Q235 Qib Sib Piv (Qib Zoo)
| Qib | Impact Test Temperature | P max (%) | S max (%) | Ntsiab Feature |
|---|---|---|---|---|
| Q235A | Tsis tau lav | 0.045 | 0.050 | Kev lag luam tshaj plaws; cov qauv |
| Q235B | +20℃(27J min) | 0.045 | 0.045 | Kev tsim kho dav dav, kev nyab xeeb me me |
| Q235C | 0℃(27J min) | 0.040 | 0.040 | Cov huab cua txias, cov qauv sab nraum zoov |
| Q235D | -20℃(27J min) | 0.035 | 0.035 | Qhov chaw txias txias |
Qib B yog qib ntau tshaj plaws rau kev tsim kho, muab kev lees paub rau qhov toughness ntawm chav tsev kub.
Mechanical Properties (GB/T 700-2006)
| Khoom | Q235B yuav tsum tau | Qhov xwm txheej |
|---|---|---|
| Yield zog (min) | 235 MPa rau | Thickness Tsawg dua los yog sib npaug li 16 hli |
| 225 MPa | 16mm | |
| 215 MPa | 40mm | |
| 205 MPa | 60mm | |
| 195 MPa ua | 100mm | |
| 185 MPa rau | t > 150mm | |
| Tensile zog | 370-500 MPa | Tag nrho cov thickness |
| Elongation (min) | 26% | Thickness Tsawg dua los yog sib npaug li 40mm |
| 25% | 40mm | |
| 24% | 60mm | |
| 23% | 100mm | |
| 22% | t > 150mm | |
| Charpy Impact (Qib B) | 27 J ntawm +20 degree | Yuav tsum tau - tus yam ntxwv txhais ntawm Qib B |
Dimensional Specifications
| Parameter | Ntau / Tolerance |
|---|---|
| Sab nraud txoj kab uas hla | 219mm txog 1829mm(8 "mus rau 72") - DSAW ntau yam |
| Phab ntsa Thickness | 5mm txog 40mm (txog 50mm 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 |
DSAW/LSAW Manufacturing Process
Ob -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 hlau 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 GB / T 700 Q235B qhov yuav tsum tau ua
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 ua, beveling, txheej, thiab cim
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 ib GB / T 700 |
| 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 | Yuav tsum tau kawm qib B | 27 j ua+20 degree |
| Hydrostatic Test | Txhua lub raj | Kev ntsuas siab ncaj ncees |
| Ultrasonic soj ntsuam | 100% ntawm weld seam | Nruam tsis siv neeg qhov tsis pom kev |
| X-Ray Inspection | Rau "T" pob qij txha | Qhov twg strip taub qab welds cuam tshuam kauv seams |
| Dimensional soj ntsuam | 100% | Raws li tus qauv tolerances |
| Mill Test Certificate | Muab | Nrog tag nrho cov txiaj ntsig kev xeem |
Cov ntawv thov siv
| Daim ntawv thov | Kev piav qhia |
|---|---|
| General Structural Engineering | Lub tsev thav duab, kab, trusses rau industrial nroj tsuag, chaw ntau pob |
| Tsawg-Hloov Fluid Transmission | Dej, roj, cua, thiab cua sov tshuab |
| Piling Foundations | Load-cov kabmob rau cov tsev thiab cov qauv |
| Infrastructure Projects | Qhov kev txhawb nqa, khaws cov phab ntsa, cov qauv kev loj |
| Mechanical Manufacturing | Khoom ntas, machinery puag |
| Kev siv kev tsim kho | Scaffolding, handrails, fencing |
GB/T 700-2006 Qib B vs. Qib A Sib piv
| Feature | Qib A (Q235A) | Qib B (Q235B) | Qhov tseem ceeb |
|---|---|---|---|
| Kev sim cuam tshuam | Tsis xav tau | Yuav tsum tau (27J ntawm +20 degree) | Qib B guarantees chav sov toughness |
| Cov pa roj carbon (C) max | 0.22% | 0.20% | Qib B muaj qis carbon rau zoo weldability |
| Sulfur (S) max | 0.050% | 0.045% | Qib B muaj kev tswj cov tshuaj sulfur nruj dua |
| Daim ntawv thov | Sab hauv, tsis yog - cov qauv tseem ceeb | Kev tsim kho dav dav, kev nyab xeeb me me | Qib B yog tus qauv xaiv rau feem ntau cov haujlwm |
Txheej txheej xaiv
Q235B 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 |
| Epoxy hmoov txheej | Corrosive ib puag ncig | Kev tiv thaiv zoo, du nto |
| 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 |
|---|---|---|
| ASTM A53 | Gr. B | Lub zog zoo sib xws (240 MPa vs . 235 MPa) |
| TS EN 10025 | S235 JR | 235 MPa tawm los, 27J ntawm +20 degree |
| JIS G3101 | SIB 400 | 245 MPa tawm los |
| DIN | TSI 37-2 | Keeb kwm German sib npaug |
Cov Lus Cim Tseem Ceeb ntawm Kev Sib Tw: Thaum feem ntau piv rau ASTM A53 Gr. B, Q235B tsis sib npaug tag nrho. A53 gr. B muaj qhov siab tshaj qhov ua tau zoo tshaj plaws (Ntau dua lossis sib npaug ntawm 240 MPa vs . 235 MPa) thiab cov khoom siv tshuaj sib txawv. Txawm li cas los xij, lawv tau siv hauv cov ntawv thov zoo sib xws.
Qhov Zoo Tshaj Plaws
| Qhov zoo | Kev piav qhia |
|---|---|
| Qib Feem Ntau | Q235B yog tus qauv xaiv rau kev tsim kho hauv Suav teb |
| Guaranteed Toughness | 27 J ntawm +20℃kom ntseeg tau tias kev ua tau zoo ntawm chav tsev kub |
| Weldability zoo heev | Cov ntsiab lus carbon tsawg (tsawg dua lossis sib npaug li 0.20%) tso cai rau vuam nrog tsawg kawg nkaus preheat |
| Zoo Formability | Haum rau txias khoov, flanging, thiab shaping yam tsis muaj cracking |
| Loj Loj Muaj peev xwm | DSAW tsim cov kav dej ntawm 8 "mus rau 72" OD - zoo tagnrho rau cov ntawv loj - txoj kab uas hla |
| High Weld Integrity | Ob -sab vuam tsim ib qho siab - zoo weld nugget nrog 100% UT tshuaj xyuas |
| Tus nqi -Cov | Kev xaiv nyiaj txiag rau kev siv cov qauv siv dav dav |
| Dav Muaj | Feem ntau stocked los ntawm Suav manufacturers |
Kev txiav txim siab tseem ceeb
1. Qib B vs. Qib A Xaiv
Qib Byog covtxheem xaivrau feem ntau ntawm kev tsim kho daim ntawv thov - guarantees chav kub cuam tshuam toughness
Qib Atsuas yog rau cov uas tsis yog - tseem ceeb, cov ntawv thov sab hauv tsev uas tsis tas yuav muaj kev cuam tshuam
Tus nqi them me me rau Qib B yog kev ncaj ncees los ntawm kev lav zoo
2. Qib B vs. Qib C/D
Qib B- 27 J ntawm +20℃- haum rau kev siv huab cua hauv tsev lossis sov so
Qib C- 27 J ntawm 0℃- rau huab cua huab cua sab nraum zoov
Qib D- 27 J ntawm -20℃- rau huab cua txias thiab thov kev thov
Rau cov ntawv thov hauv cheeb tsam txias, qhia Qib C lossis D hloov
3. Daim Ntawv Ceeb Toom Txheem
GB / T 700-2006 tau hloov los ntawmGB/T 700-2019
Thaum txiav txim, qhia qhov yuav tsum tau version xyoo kom ua raws li
Feem ntau cov tuam ntxhab tseem tsim tawm rau xyoo 2006 tus qauv specifications
4. Khoom Txheem
Thaum GB / T 700 txhais covqib khoom siv, cov khoom tiav DSAW yeeb nkab feem ntau yog tsim los rau cov qauv khoom xws li:
GB/T 3091- Welded steel kav rau qis - cov kua xa hluav taws xob
GB/T 9711- Petroleum thiab natural gas industries kab yeeb nkab
SY/T 5037- Kauv submerged arc welded yeeb nkab rau qis - cov kua dej siab
5. Kev txwv siab
Q235B yog haum rautsawg rau nruab nrab siab siv(feem ntau Tsawg dua lossis sib npaug rau 1.6 MPa rau GB / T 3091)
Rau kev xav tau siab dua, xav txog Q355 qib
6. Kev txwv kub
Qhov kub siab tshaj plaws kev pab cuam pom zoo:350℃(662℃F)
luv- lub sij hawm raug mus txog 450℃ua tau
Tsis muaj kev lees paub qis -kub toughness qis dua 0℃- rau sub-zero daim ntawv thov, qhia Qib C (0 degree) lossis D (-20 degree)
7. Txheej rau kev tiv thaiv corrosion
Rau cov ntawv thov faus, qhia meej3LPE lossis FBE txheej
Rau kev tiv thaiv ib ntus, kua roj vanish lossis anti- xeb roj txaus
8. Thib peb-Kev soj ntsuam tog
Muaj cov kev pabcuam tshuaj xyuas suav nrog SGS, BV, Lloyds
9. Weldability
Cov ntsiab lus carbon tsawg (tsawg dua lossis sib npaug li 0.20%) ua kom muaj kev sib txuas zoo heev
Preheat kub: 100-150℃pom zoo rau cov seem tuab
Tsis muaj kev tshaj tawm -weld kev kho cua sov yuav tsum tau rau feem ntau thicknesses
Haum rau txhua txoj kev vuam txheej txheem (SMAW, GTAW, GMAW, SAW)
Cov ntsiab lus
GB/T 700-2006 Qib B (Q235B) Ob Chav Sided Submerged Arc Welded (DSAW) steel yeeb nkabyog cov feem ntau carbon structural steel yeeb nkab rau kev tsim kho thiab tsawg- kev siv siab hauv Suav teb. Nrog yam tsawg kawg nkaus tawm lub zog ntawm235 MPa (34,000 psi), tensile lub zog ntawm370-500 MPa, thiab lav Charpy cuam tshuam toughness ntawm27 J ntawm chav tsev kub (+20 degree), cov khoom siv no yog tus qauv xaiv rau ntau yam kev siv uas yuav tsum tau lav chav sov toughness.
Cov yam ntxwv tseem ceeb:
Khoom txheem: GB/T 700-2006 Q235B
Qib Blav27 J cuam tshuam toughness ntawm +20 degree- qhov sib txawv tseem ceeb ntawm Qib A
Tsawg carbon cov ntsiab lus(0.20% vs . 0.22%) thiabnruj dua sulfur tswj(0.045% vs. 0.050%) dua qib A
DSAW manufacturingtsim cov kav dej los ntawm8" rau 72" ODnrog phab ntsa thickness mus txog40 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 kom zoo
Weldability zoo heevthiab zoo formability
Qib feem ntaurau kev tsim kho hauv Suav teb
Cov ntawv thov uas muaj xws li:
General structural engineering (tsev thav duab, kab, trusses)
Tsawg- cov kua xa hluav taws xob siab (dej, roj, cua, cua sov tshuab)
Piling foundations rau cov tsev thiab cov tsev
Infrastructure tej yaam num (tunnels, tuav phab ntsa)
Kev tsim kho (Scaffolding, handrails)
Thaum ordering, qhia:GB/T 700-2006, Qib Q235B, DSAW (Ob-Sided Submerged Arc Welded), Loj (OD x WT), Length, Finish Finish (plain/beveled), Coating Requirements, thiab Mill Test Certificate.
Rau cov ntawv thov uas xav tau kev lees paub qis -kub toughness, qhia meejQib C (0 degree) lossis Qib D (-20 degree)xwb.
