JIS G 3461 cov yeeb nkab hlauyog ib qho seamless (SMLS) lossis hluav taws xob-tsis kam-welded (ERW) carbon steel yeeb nkab, feem ntau yog siv rau hauv boilers thiab cov cua sov exchangers rau cov ntawv thov xws li kev paub txog kev sib pauv cua sov ntawm sab hauv thiab sab nraud lub raj.
STB340yog qib yeeb nkab hlau carbon hauv tus qauv JIS G 3461. Nws muaj lub zog tensile tsawg kawg nkaus ntawm 340 MPa thiab lub zog yield tsawg kawg nkaus ntawm 175 MPa.
Nws yog cov khoom siv xaiv rau ntau daim ntawv thov kev lag luam vim nws lub zog siab, kev ruaj khov thermal zoo, kev hloov pauv tau yooj yim, kev tiv thaiv corrosion, kev siv nyiaj tsim nyog, thiab kev ua haujlwm zoo.
JIS G 3461muaj peb qib.STB340, STB410, STB510.
STB340Lub zog tensile tsawg kawg nkaus: 340 MPa; Lub zog tso tawm tsawg kawg nkaus: 175 MPa.
STB410Lub Zog Tensile Yam Tsawg Kawg Nkaus: 410 MPa; Lub Zog Yield Yam Tsawg Kawg Nkaus: 255 MPa.
STB510:Lub Zog Tensile Yam Tsawg Kawg Nkaus: 510 MPa; Lub Zog Tawm Yam Tsawg Kawg Nkaus: 295 MPa.
Qhov tseeb, nws tsis nyuaj rau nrhiav pom tias JIS G 3461 qib raug faib raws li lub zog tensile tsawg kawg nkaus ntawm cov yeeb nkab hlau.
Thaum qib ntawm cov khoom nce ntxiv, nws lub zog tensile thiab yield strengths nce ntxiv raws li, uas ua rau cov khoom siv tiv taus cov loads thiab pressures ntau dua rau cov chaw ua haujlwm uas xav tau ntau dua.
Sab nraud txoj kab uas hla ntawm 15.9-139.8 hli.
Cov kev siv rau hauv cov boilers thiab cov khoom hloov pauv cua sov feem ntau tsis xav tau cov raj loj heev. Cov raj me dua ua rau muaj kev ua haujlwm thermal zoo dua vim tias qhov chaw ntawm qhov chaw thiab qhov ntim piv rau kev hloov pauv cua sov siab dua. Qhov no pab hloov pauv lub zog cua sov sai dua thiab ua haujlwm tau zoo dua.
Cov raj yuav tsum tau ua los ntawm cov khoom sivtua hlau.
Kev sib xyaw ua ke ntawm cov txheej txheem tsim yeeb nkab thiab cov txheej txheem ua tiav.
Hauv kev nthuav dav, lawv tuaj yeem raug cais ua pawg raws li hauv qab no:
Cov yeeb nkab hlau tsis muaj seamless kub tiav lawm: SH
Cov yeeb nkab hlau tsis muaj seamless txias: SC
Raws li hluav taws xob tsis kam welded steel raj: EG
Cov yeeb nkab hlau uas ua los ntawm hluav taws xob kub thiab tsis xeb: EH
Cov yeeb nkab hlau uas ua los ntawm hluav taws xob uas txias thiab tsis xeb: EC
Nov yog cov txheej txheem ntau lawm ntawm Hot-finished seamless.
Rau cov txheej txheem tsim khoom tsis muaj qhov tsis sib xws, nws tuaj yeem faib ua cov kav hlau tsis muaj qhov tsis sib xws nrog lub cheeb sab nraud ntau dua 30 hli siv cov khoom kub tiav, thiab 30 hli siv cov khoom txias tiav.
Cov txheej txheem tshuaj xyuas thermal yuav tsum ua raws li cov qauv hauv JIS G 0320.
Cov khoom sib xyaw uas tsis yog cov ntawd yuav raug ntxiv kom tau txais cov khoom tshwj xeeb.
Thaum cov khoom raug tshuaj xyuas, qhov sib txawv ntawm cov tshuaj lom neeg ntawm cov yeeb nkab yuav tsum ua tau raws li qhov yuav tsum tau ua ntawm Rooj 3 ntawm JIS G 0321 rau cov yeeb nkab hlau tsis sib xws thiab Rooj 2 ntawm JIS G 0321 rau cov yeeb nkab hlau uas tsis kam.
| Lub cim ntawm qib | C (Cov pa roj carbon) | Si (Silicon) | Mn (Manganese) | P (Phosphorus) | S (Sulfur) |
| siab tshaj plaws | siab tshaj plaws | siab tshaj plaws | siab tshaj plaws | ||
| STB340 | 0.18 | 0.35 | 0.30-0.60 | 0.35 | 0.35 |
| Tus neeg yuav khoom tuaj yeem teev tus nqi ntawm Si kom nyob rau hauv qhov ntau ntawm 0.10% txog 0.35%. | |||||
Cov tshuaj lom neeg sib xyaw ntawm STB340 yog tsim los kom ntseeg tau tias muaj cov khoom siv kho tshuab thiab kev siv tshuab tau zoo thaum ua cov khoom siv rau kev vuam thiab kev siv hauv qhov chaw kub siab.
| Lub cim ntawm qib | Lub zog tensile a | Yield point los yog proof stress | Qhov ntev tsawg kawg nkaus,% | ||
| Sab nraud txoj kab uas hla | |||||
| <10 hli | ≥10mm ＜20mm | ≥20 hli | |||
| N/mm² (MPA) | N/mm² (MPA) | Daim ntawv sim | |||
| Naj Npawb 11 | Naj Npawb 11 | Naj Npawb 11/Naj Npawb 12 | |||
| feeb | feeb | Kev taw qhia ntawm kev sim tensile | |||
| Sib luag rau lub raj axis | Sib luag rau lub raj axis | Sib luag rau lub raj axis | |||
| STB340 | 340 | 175 | 27 | 30 | 35 |
Lus Cim: tsuas yog rau cov raj xa cua sov xwb, tus neeg yuav khoom tuaj yeem, qhov twg tsim nyog, qhia qhov siab tshaj plaws ntawm lub zog tensile. Hauv qhov no, qhov siab tshaj plaws ntawm lub zog tensile yuav tsum yog tus nqi tau los ntawm kev ntxiv 120 N / mm² rau tus nqi hauv lub rooj no.
Thaum qhov kev sim tensile raug ua tiav rau ntawm Daim Ntawv Xeem No. 12 rau lub raj hauv qab 8 hli hauv phab ntsa tuab.
| Lub cim ntawm qib | Daim ntawv sim siv | Kev ntev tsawg kawg, % | ||||||
| Phab ntsa tuab | ||||||||
| >1 ≤2 hli | >2 ≤3 hli | >3 ≤4 hli | > 4 ≤ 5 hli | > 5 ≤ 6 hli | >6 ≤7 hli | >7 <8 hli | ||
| STB340 | Naj Npawb 12 | 26 | 28 | 29 | 30 | 32 | 34 | 35 |
Cov nqi elongation hauv lub rooj no yog xam los ntawm kev rho tawm 1.5% ntawm tus nqi elongation uas tau muab hauv Rooj 4 rau txhua 1 hli txo qis hauv lub raj phab ntsa tuab ntawm 8 hli, thiab los ntawm kev puag ncig qhov tshwm sim rau tus lej raws li Txoj Cai A ntawm JIS Z 8401.
Txoj kev sim yuav tsum ua raws li JIS Z 2245. Qhov nyuaj ntawm daim ntawv sim yuav tsum ntsuas ntawm nws qhov seem lossis sab hauv ntawm peb qhov chaw rau ib daim ntawv sim.
| Lub cim ntawm qib | Rockwell hardness (tus nqi nruab nrab ntawm peb txoj haujlwm) HRBW |
| STB340 | siab tshaj 77. |
| STB410 | siab tshaj 79. |
| STB510 | siab tshaj 92 |
Qhov kev sim no yuav tsum tsis txhob ua rau ntawm cov raj ntawm phab ntsa tuab 2 hli lossis qis dua. Rau cov raj hlau uas tsis kam hluav taws xob, qhov kev sim yuav tsum tau ua rau ntawm qhov chaw uas tsis yog qhov vuam lossis thaj chaw uas raug cua sov.
Nws tsis siv rau cov kav hlau tsis muaj seamless.
Txoj Kev Ntsuas Muab cov qauv tso rau hauv lub tshuab thiab ua kom tiaj tiaj kom txog thaum qhov deb ntawm ob lub platform mus txog tus nqi teev tseg H. Tom qab ntawd xyuas cov qauv kom paub seb puas muaj kab nrib pleb.
Thaum kuaj cov yeeb nkab vuam uas muaj qhov tsis kam tseem ceeb, txoj kab ntawm qhov vuam thiab qhov chaw nruab nrab ntawm cov yeeb nkab yog perpendicular rau qhov kev taw qhia compression.
H=(1+e)t/(e+t/D)
H: qhov deb ntawm cov platens (hli)
t: phab ntsa tuab ntawm lub raj (hli)
D: sab nraud txoj kab uas hla ntawm lub raj (hli)
e:qhov tsis hloov pauv tau txhais rau txhua qib ntawm lub raj. STB340: 0.09; STB410: 0.08; STB510: 0.07.
Nws tsis siv rau cov kav hlau tsis muaj seamless.
Ib kawg ntawm cov qauv raug flared ntawm chav tsev kub (5 ° C txog 35 ° C) nrog lub cuab yeej conical ntawm lub kaum sab xis ntawm 60 ° kom txog thaum lub sab nraud txoj kab uas hla loj dua los ntawm qhov sib piv ntawm 1.2 thiab kuaj xyuas seb puas muaj kab nrib pleb.
Qhov yuav tsum tau ua no kuj siv rau cov raj uas muaj sab nraud ntawm ntau dua 101.6 hli.
Qhov kev sim flaring rov qab yuav raug tshem tawm thaum ua qhov kev sim flaring.
Txiav ib daim ntawv sim uas ntev 100 hli ntawm ib kawg ntawm lub yeeb nkab thiab txiav daim ntawv sim ua ib nrab ntawm 90° ntawm txoj kab vuam ntawm ob sab ntawm qhov ncig, siv ib nrab uas muaj qhov vuam ua daim ntawv sim.
Thaum sov li chav tsev (5 °C txog 35 °C), muab daim qauv no tais ua ib lub phaj nrog qhov vuam nyob rau sab saum toj thiab tshuaj xyuas daim qauv seb puas muaj qhov tawg hauv qhov vuam.
Txhua lub yeeb nkab hlau yuav tsum tau kuaj xyuas hydrostatically lossis non-destructivelykom ntseeg tau tias cov yeeb nkab zoo thiab muaj kev nyab xeeb thiab ua tau raws li cov qauv siv.
Kev Ntsuas Hydraulic
Tuav sab hauv ntawm lub yeeb nkab kom tsawg kawg nkaus lossis siab dua P (P max 10 MPa) tsawg kawg 5 vib nas this, tom qab ntawd xyuas kom lub yeeb nkab tiv taus lub siab yam tsis muaj qhov xau.
P=2st/D
P: kev sim siab (MPa)
t: phab ntsa tuab ntawm lub raj (hli)
D: sab nraud txoj kab uas hla ntawm lub raj (mm)
s: 60% ntawm tus nqi tsawg kawg nkaus uas tau teev tseg ntawm cov ntsiab lus tawm los lossis kev ntxhov siab pov thawj.
Kev Ntsuas Tsis Ua Rau Puas Tsuaj
Kev sim tsis ua puas tsuaj ntawm cov kav hlau yuav tsum tau ua los ntawmkev kuaj ultrasonic lossis eddy tam sim no.
Rauultrasoniccov yam ntxwv tshuaj xyuas, lub teeb liab los ntawm cov qauv siv uas muaj tus qauv siv ntawm chav kawm UD raws li tau teev tseg hauvJIS G 0582yuav tsum raug suav hais tias yog qib ceeb toom thiab yuav tsum muaj lub teeb liab yooj yim sib npaug lossis loj dua qib ceeb toom.
Tus qauv kev ntsuas qhov rhiab heev raueddy tam sim nokev xeem yuav tsum yog pawg EU, EV, EW, lossis EX teev tseg rau hauvJIS G 0583, thiab yuav tsum tsis muaj cov cim qhia sib npaug lossis loj dua li cov cim qhia los ntawm cov qauv siv uas muaj tus qauv siv ntawm pawg no.
Yog xav paub ntxivCov Duab Qhia Txog Qhov Hnyav ntawm Cov Yeeb Nkab thiab Cov Sijhawm Yeeb Nkabnyob rau hauv tus qauv, koj tuaj yeem nyem los ntawm.
Siv ib txoj kev tsim nyog los sau cov ntaub ntawv hauv qab no.
a) Lub cim ntawm qib;
b) Lub cim rau txoj kev tsim khoom;
c) Qhov Loj: sab nraud txoj kab uas hla thiab phab ntsa tuab;
d) Lub npe ntawm cov chaw tsim khoom lossis lub npe lag luam uas qhia tau.
Thaum lub cim rau ntawm txhua lub raj mis nyuaj vim nws txoj kab uas hla sab nraud me me lossis thaum tus neeg yuav khoom thov, lub cim yuav raug muab rau ntawm txhua pob ntawm cov raj mis los ntawm txoj kev tsim nyog.
STB340 feem ntau yog siv rau hauv kev tsim cov kav dej thiab cov kav dej rau ntau yam boilers kev lag luam, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas xav tau kev tiv taus kub thiab siab.
Vim nws cov khoom siv cua sov zoo, nws kuj tsim nyog rau kev tsim cov kav dej rau cov khoom sib pauv cua sov, pab hloov pauv cua sov tau zoo ntawm ntau yam xov xwm.
Nws kuj tseem siv tau los thauj cov kua dej kub lossis cov kua dej siab, xws li cov pa dej lossis dej kub, thiab siv dav hauv kev lag luam tshuaj lom neeg, hluav taws xob, thiab kev tsim khoom siv tshuab.
ASTM A106 Qib A
DIN 17175 St35.8
DIN 1629 St37.0
BS 3059-1 Qib 320
EN 10216-1 P235GH
GB 3087 20#
GB 5310 20G
Txawm hais tias cov ntaub ntawv no yuav zoo sib xws hauv cov tshuaj lom neeg thiab cov yam ntxwv tseem ceeb, cov txheej txheem kho cua sov tshwj xeeb thiab kev siv tshuab yuav cuam tshuam rau cov yam ntxwv ntawm cov khoom kawg.
Yog li ntawd, yuav tsum tau ua qhov kev sib piv kom ntxaws thiab kev sim kom tsim nyog thaum xaiv cov ntaub ntawv sib npaug rau kev siv ua haujlwm.
Txij li thaum nws tau tsim tsa xyoo 2014, Botop Steel tau dhau los ua tus thawj coj ntawm cov yeeb nkab hlau carbon hauv Sab Qaum Teb Suav teb, paub txog kev pabcuam zoo heev, cov khoom lag luam zoo, thiab cov kev daws teeb meem dav dav. Lub tuam txhab muab ntau yam yeeb nkab hlau carbon thiab cov khoom lag luam cuam tshuam, suav nrog cov yeeb nkab hlau tsis muaj qhov txuas, ERW, LSAW, thiab SSAW, nrog rau cov khoom siv yeeb nkab thiab flanges tiav.
Nws cov khoom tshwj xeeb kuj suav nrog cov hlau alloys zoo thiab cov hlau stainless austenitic, tsim los ua kom tau raws li qhov xav tau ntawm ntau yam dej num pipeline.
