GB/T 700-2006 Qib C Ob Chav Sided Submerged Arc Vuam (DSAW) Hlau Yeeb Nkab
Lub ntsiab lus tseem ceeb
GB/T 700-2006 Qib C (Q235C) Ob Chav Sided Submerged Arc Vuam (DSAW) steel yeeb nkabyog carbon structural steel yeeb nkab nrog guaranteed tsawg -kub tej yam toughness ntawm0 degree. Qhov no ua rau nws tsim nyog rau cov qauv sab nraum zoov hauv cov huab cua txias uas Qib B chav - qhov ntsuas kub tsis txaus.
Cov txheej txheem DSAW (tseem hu ua LSAW - Longitudinal Submerged Arc Vuam) txheej txheem yog qhov siab - vuam txoj kev ncaj ncees uas siv ob sab hauv thiab sab nraud welds, tsim ib qhoib leeg siab -zoo weld nugget. Cov txheej txheem no yog qhov tshwj xeeb tshaj yog zoo - haum rau loj - txoj kab uas hla, tuab - cov kav dej phab ntsa siv hauv cov txheej txheem, piling, thiab qis - cov ntaub ntawv siv kua hauv cov cheeb tsam uas muaj qhov kub thiab txias.
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 C | Qib zoo –guarantees cuam tshuam toughness ntawm 27 J ntawm 0 degree; Kev tswj nruj dua ntawm P (0.040%) thiab S (0.040%) dua qib B |
| 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 |
Ntsiab Specifications
| Yam ntxwv | Kev piav qhia |
|---|---|
| Khoom Txheem | GB/T 700-2006- Cov Khoom Siv Hluav Taws Xob |
| Qib Steel | Q235C- Yam tsawg kawg nkaus yield zog 235 MPa (rau thickness Tsawg dua los yog sib npaug rau 16mm) |
| Qib zoo | Qib C- Guaranteed cuam tshuam toughness ntawm0 degree(27 J yam tsawg kawg nkaus) |
| 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 C)
| Element | Ntau tshaj % | Sau ntawv |
|---|---|---|
| Cov pa roj carbon (C) | 0.17-0.18% | qis dua Qib A (0.22%) thiab Qib B (0.20%); txhim kho qis-kub toughness |
| Silicon (Si) | 0.35% | Deoxidizer |
| Manganese (Mn) | 1.40% | Muab lub zog |
| Phosphorus (P) | 0.040% | Tighter dua qib B (0.045%); txhim kho qis -kub kev ua haujlwm |
| Sulfur (S) | 0.040% | Tighter dua qib B (0.045%); txo kub cracking txaus ntshai |
* Ceebtoom: Qib C muaj cov ntsiab lus qis dua (tsawg dua lossis sib npaug rau 0.17-0.18%) thiab nruj dua phosphorus / sulfur txwv piv rau cov qib qis, ua rau muaj kev kub ntxhov zoo dua.*
Q235 Qib Sib Piv (Qib Zoo)
| Qib | Impact Test Temperature | P max (%) | S max (%) | C max (%) | Ntsiab Feature |
|---|---|---|---|---|---|
| Q235A | Tsis tau lav | 0.045 | 0.050 | 0.22 | Kev lag luam tshaj plaws; cov qauv |
| Q235B | +20℃(27J min) | 0.045 | 0.045 | 0.20 | Kev tsim kho dav dav, kev nyab xeeb me me |
| Q235C | 0℃(27J min) | 0.040 | 0.040 | 0.17 | Cov huab cua txias, cov qauv sab nraum zoov |
| Q235D | -20℃(27J min) | 0.035 | 0.035 | 0.17 | Qhov chaw txias txias |
Qib C muaj kev lav phib xaub toughness ntawm0 degree, ua rau nws haum rau cov qauv sab nraum zoov hauv cheeb tsam uas qhov kub thiab txias poob mus rau khov.
Mechanical Properties (GB/T 700-2006)
| Khoom | Q235C 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 | 375-500 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 C) | 27j0 qib | Mandatory – tus yam ntxwv ntawm Qib C |
Dimensional Specifications
| Parameter | Ntau Yam / 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 chav -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
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 | 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 Q235C cov cai
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 tshawb nrhiav tsis tu ncua ultrasonic tsis siv neeg qhov tsis zoo; xyuas kom 100% ntawm weld seam kev pab them nqi
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 cov kev txwv muaj pes tsawg leeg 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 C | 27j0 qib |
| 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 qhabnias |
Daim ntawv thov
Q235C DSAW cov kav dej tshwj xeeb yog tsim rau cov cheeb tsam thiab cov ntawv thov uas qhov kub thiab txias poob mus rau khov:
| Daim ntawv thov | Kev piav qhia |
|---|---|
| Kev tsim kho huab cua txias | Lub tsev thav duab, kab, trusses nyob rau hauv cheeb tsam nrog txias txias (Northeast Tuam Tshoj, Inner Mongolia, Xinjiang, Gansu, Ningxia, Heilongjiang) |
| Sab nraum zoov cov qauv | Cov choj, cov kav hlau txais xov, cov qauv kev loj hauv temperate rau huab cua txias |
| Tsawg-Hloov Fluid Transmission | Dej, roj pipelines hauv cheeb tsam nrog lub caij ntuj no khov |
| Piling Foundations | Thauj khoom-cov kabmob rau cov tsev nyob hauv thaj chaw uas muaj 0℃lub caij ntuj no kub |
| Infrastructure Projects | Qhov kev txhawb nqa, khaws cov phab ntsa, chaw nres nkoj hauv thaj chaw txias dua |
| Mechanical Manufacturing | Cov khoom yuav tsum tau guaranteed toughness ntawm 0 degree |
GB/T 700-2006 Qib C vs. Qib B/D Sib piv
| Feature | Qib B (Q235B) | Qib C (Q235C) | Qib D (Q235D) |
|---|---|---|---|
| Kev ntsuam xyuas cuam tshuam | 27J ntawm +20 degree | 27j0 qib | 27J ntawm -20 degree |
| Cov pa roj carbon (C) max | 0.20% | 0.17% | 0.17% |
| Phosphorus (P) max | 0.045% | 0.040% | 0.035% |
| Sulfur (S) max | 0.045% | 0.040% | 0.035% |
| Daim ntawv thov | Kev tsim kho dav dav, kev nyab xeeb me me | Cov huab cua txias, cov qauv sab nraum zoov | Qhov chaw txias txias |
Qib C yog qhov kev xaiv zoo tshaj plaws rau cov qauv sab nraum zoov hauv huab cua sov nrog lub caij ntuj no txias txias, muab qhov zoo dua qis- qhov kub thiab txias dua li Qib B yam tsis muaj tus nqi siab dua ntawm Qib D.
Txheej txheej xaiv
Q235C DSAW yeeb nkab tuaj yeem muab nrog ntau txheej txheej rau kev tiv thaiv corrosion:
| Txheej hom | Zoo tshaj rau | Ntsiab nta |
|---|---|---|
| 3LPE (3-txheej polyethylene) | Cov kav dej faus | Feem ntau; zoo heev tiv thaiv corrosion, siab cuam tshuam kuj |
| 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 | A36 | Lub zog zoo sib xws; txawv qhov ntsuas kub |
| TS EN 10025 | S235J0 | 235 MPa tawm los, 27J ntawm 0 degree |
| JIS G3101 | TSI 400 | 245 MPa tawm los; cuam tshuam cov kev xav tau txawv |
| DIN | TSI 37-3 | Keeb kwm German sib npaug |
Qhov Zoo Tshaj Plaws
| Qhov zoo | Kev piav qhia |
|---|---|
| Guaranteed 0℃Toughness | 27 J ntawm 0℃kom ntseeg tau tias kev ua tau zoo hauv qhov txias txias |
| Cov ntsiab lus qis carbon | Tsawg dua lossis sib npaug rau 0.17-0.18% carbon txhim kho qhov kub thiab txias toughness thiab weldability |
| Tighter Chemistry Controls | P Tsawg dua lossis sib npaug rau 0.040%, S Tsawg dua lossis sib npaug rau 0.040% - nruj dua Qib B, txhim kho tag nrho cov khoom zoo |
| Weldability zoo heev | Tsawg carbon cov ntsiab lus tso cai rau welding nrog tsawg preheat |
| 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 | Muab ob npaug rau- sab vuam tsim ib qho siab - zoo weld nugget nrog 100% UT tshuaj xyuas |
| Tus nqi -Cov | Kev lag luam ntau dua li Qib D thaum muab kev ua haujlwm qis dua - kub dua li Qib B |
Kev txiav txim siab tseem ceeb
1. Qib C vs. Qib B/D Xaiv
Qib B- 27 J ntawm +20℃- haum rau kev siv huab cua sab hauv lossis sov
Qib C – 27j0 qib- zoo rau cov qauv sab nraum zoov nyob rau hauv temperate climates nrog freezing winters
Qib D- 27 J ntawm -20℃- rau qhov chaw txias txias thiab xav tau daim ntawv thov
Xaiv Qib C thaum qhov ntsuas kub tsawg kawg yog nyob ib puag ncig 0℃tab sis tsis tas yuav muaj peev xwm -20 degree
2. Cov ntawv thov hauv cheeb tsam
Q235C DSAW kav yog dav siv nyob rau hauv cov cheeb tsam txias ntawm Tuam Tshoj xws li:
Jilin, Liaoning, Heilongjiang (Northeast Tuam Tshoj)
Sab hauv Mongolia, Ningxia, Gansu
Xinjiang
3. Daim Ntawv Ceeb Toom Txheem
GB / T 700-2006 tau hloov pauv 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
Q235C 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 siab tshaj plaws qhov kev pab cuam qhov kub thiab txias:350℃(662℃F)
luv-lub sij hawm raug mus txog 450℃ua tau
Qhov ntsuas kub tsawg kawg nkaus: 0 degree(nrog guaranteed cuam tshuam toughness)
Rau cov ntawv thov qis dua 0 degree, qhia Qib D (-20 degree) hloov
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 0.17-0.18%) ua kom muaj kev sib txuas zoo heev
Haum rau txhua txoj kev vuam txheej txheem (SMAW, GTAW, GMAW, SAW)
Tsis muaj kev tshaj tawm -weld cua sov yuav tsum tau kho rau feem ntau thicknesses
Cov ntsiab lus
GB/T 700-2006 Qib C (Q235C) Ob Chav Sided Submerged Arc Welded (DSAW) steel yeeb nkabyog ib tug carbon structural steel yeeb nkab tshwj xeeb tsim rau daim ntaub ntawv uas yuav tsum tau guaranteed tej yam toughness ntawm0 degree. Nrog yam tsawg kawg nkaus tawm lub zog ntawm235 MPa (34,000 psi)thiab tensile zog ntawm375-500 MPa, cov khoom siv no yog qhov kev xaiv zoo tshaj plaws rau cov qauv sab nraum zoov hauv cov huab cua sov nrog lub caij ntuj no txias txias.
Cov yam ntxwv tseem ceeb:
Khoom txheem: GB/T 700-2006 Q235C
Qib C guarantees 27 J cuam tshuam toughness ntawm 0 degree- tus tseem ceeb sib txawv ntawm Qib B
Tsawg cov ntsiab lus carbon(tsawg dua lossis sib npaug li 0.17-0.18%) thiabnruj dua phosphorus / sulfur tswj(0.040% max) tshaj Qib B
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 los yog UOE tsimcov txheej txheem kom paub meej qhov tseeb qhov tseeb
100% ultrasonic kuajntawm weld seam kom zoo
Weldability zoo heevthiab zoo formability
Dav siv nyob rau hauv cheeb tsam txias(Northeast Tuam Tshoj, Inner Mongolia, Xinjiang, thiab lwm yam)
Cov ntawv thov uas muaj xws li:
Kev tsim kho huab cua txias (tsev thav duab, kab, trusses)
Sab nraum zoov cov qauv hauv qhov txias txias (choj, xa cov yees)
Tsawg-kev sib kis ntawm cov kua hauv cov cheeb tsam nrog lub caij ntuj no khov
Piling foundations thiab infrastructure tej yaam num
Cov cuab yeej siv tshuab yuav tsum tau lav 0℃toughness
Thaum ordering, qhia:GB/T 700-2006, Qib Q235C, DSAW (Double-Sided Submerged Arc Welded), Loj (OD x WT), Ntev, Qhov Kawg Finish (plain/beveled), Cov Txheej Txheem Txheej Txheem, thiab Daim Ntawv Pov Thawj Zeb Xeem.
Rau cov ntawv thov uas xav tau kev lees paub qis -kub toughness ntawm -20 degree, qhia meejQib Dxwb. Rau kev tsim kho hauv cov huab cua me me uas khov tsis muaj kev txhawj xeeb,Qib Byog txaus thiab nyiaj txiag ntau.
