ASTM A500 yog cov kav hlau carbon uas tau welded thiab seamless uas txias thiab tsis muaj qhov sib txuas rau cov choj welded, riveted, lossis bolted thiab cov qauv tsev thiab cov hom phiaj dav dav.
Qib Byog ib lub raj xa dej uas muaj ntau yam kev sib txuas ua ke los yog seamless carbon steel uas muaj zog tsis tsawg dua 315 MPa [46,000 psi] thiab lub zog tensile tsis tsawg dua 400 MPa [58,000], uas yog siv rau hauv ntau yam kev tsim vaj tsev thiab kev kho tshuab vim nws txoj kev ruaj khov thiab kev ua haujlwm ntev.
ASTM A500 faib cov yeeb nkab hlau ua peb qib,qib B,qib C, thiab qib D.
Rau cov raj xa dej uas muajsab nraud txoj kab uas hla ≤ 2235mm [88in]thiabphab ntsa tuab ≤ 25.4 hli [1 nti].
Txawm li cas los xij, yog tias siv cov txheej txheem ERW vuam, tsuas yog cov kav dej uas muaj qhov siab tshaj plaws ntawm 660 hli thiab phab ntsa tuab ntawm 20 hli tuaj yeem ua tau.
Yog tias koj xav yuav cov yeeb nkab uas muaj phab ntsa tuab dua, koj tuaj yeem xaiv siv cov txheej txheem vuam SAW.
CHS: Cov ntu khoob puag ncig.
RHS: Cov seem hollow square los yog rectangular.
EHS: Cov seem elliptical hollow.
Cov hlau yuav tsum ua los ntawm ib lossis ntau yam ntawm cov txheej txheem hauv qab no:cov pa oxygen yooj yim lossis lub cub hluav taws xob.
Cov Txheej Txheem Pa oxygen Yooj Yim: Qhov no yog ib txoj kev niaj hnub no ntawm kev tsim hlau sai, uas txo cov pa roj carbon los ntawm kev tshuab pa oxygen rau hauv cov hlau npua uas yaj thaum tshem tawm lwm yam tsis xav tau xws li sulfur thiab phosphorus. Nws yog qhov tsim nyog rau kev tsim hlau sai sai.
Cov Txheej Txheem Rauv Hluav Taws Xob: Cov Txheej Txheem Rauv Hluav Taws Xob siv cov hluav taws xob kub siab los yaj cov khoom seem thiab txo cov hlau ncaj qha, thiab nws muaj txiaj ntsig zoo rau kev tsim cov qib tshwj xeeb thiab tswj cov khoom sib xyaw, nrog rau kev tsim khoom me me.
Cov raj yuav tsum tau ua los ntawmhluav taws xob-tsis kam-welded (ERW)txheej txheem.
ERW yeeb nkab yog cov txheej txheem ntawm kev tsim ib qho vuam los ntawm kev coiling ib yam khoom siv hlau rau hauv ib lub tog raj kheej thiab siv kev tiv thaiv thiab siab raws nws qhov ntev.
Cov raj qib B tuaj yeem raug annealed lossis kev ntxhov siab-relieve.
Cov tshuaj lom neeg sib xyaw ntawm ASTM A500 Qib B hlau muaj cov pa roj carbon thiab manganese nruab nrab kom ntseeg tau tias muaj cov khoom siv kho tshuab zoo thiab weldability. Tib lub sijhawm, cov phosphorus thiab sulfur theem raug tswj hwm kom tsis txhob muaj embrittlement, thiab ntxiv cov tooj liab nruab nrab txhim kho kev tiv thaiv corrosion.
Cov khoom no zoo tagnrho rau cov ntawv thov kev tsim kho, tshwj xeeb tshaj yog nyob rau hauv cov chaw uas xav tau kev vuam zoo thiab kev ua haujlwm ntev.
Cov qauv yuav tsum ua tau raws li cov kev cai ntawm ASTM A370, Appendix A2.
| Daim Ntawv Teev Npe | Qib B | |
| Lub zog tensile, min | psi | 58,000 |
| MPa | 400 | |
| Lub zog tawm los, min | psi | 46,000 |
| MPa | 315 | |
| Kev ntev hauv 2 nti (50 hli), feeb,C | % | 23A |
| ASiv rau cov phab ntsa tuab uas tau teev tseg (t) sib npaug lossis ntau dua 0.180 nti [4.57 hli]. Rau cov phab ntsa tuab uas tau teev tseg sib dua, cov nqi elongation tsawg kawg nkaus yuav tsum tau xam los ntawm cov mis: feem pua ntawm elongation hauv 2 nti [50 hli] = 61t + 12, puag ncig mus rau feem pua nyob ze tshaj plaws. Rau A500M siv cov mis hauv qab no: 2.4t + 12, puag ncig mus rau feem pua nyob ze tshaj plaws. CCov nqi qis tshaj plaws uas tau teev tseg tsuas yog siv rau cov kev sim ua ntej xa khoom ntawm lub raj. | ||
Kev vuamdkev ua haujlwmtyogSiv cov qauv uas ntev tsawg kawg yog 4 nti (100 hli), ua kom cov qauv tiaj tiaj nrog qhov vuam ntawm 90° mus rau qhov kev taw qhia ntawm kev thauj khoom kom txog thaum qhov deb ntawm cov phaj tsawg dua 2/3 ntawm sab nraud ntawm lub yeeb nkab. cov qauv yuav tsum tsis txhob tawg lossis tawg rau sab hauv lossis sab nraud thaum lub sijhawm no.
Kev ntsuam xyuas kev ua haujlwm ntawm cov yeeb nkab: txuas ntxiv ua kom cov qauv tiaj tus kom txog thaum qhov deb ntawm cov phaj tsawg dua 1/2 ntawm lub yeeb nkab sab nraud. lub sijhawm no, cov yeeb nkab yuav tsum tsis muaj qhov tawg lossis tawg ntawm sab hauv thiab sab nraud.
Kev ncaj nceestyogTxuas ntxiv ua kom cov qauv tiaj tus kom txog thaum muaj qhov tawg lossis kom txog thaum cov phab ntsa tuab raws li qhov yuav tsum tau ua. Yog tias pom muaj pov thawj ntawm cov ply tev tawm, cov khoom tsis ruaj khov, lossis cov vuam tsis tiav thaum lub sijhawm sim tiaj tus, cov qauv yuav raug txiav txim siab tsis txaus siab.
Kev sim flaring muaj rau cov raj puag ncig ≤ 254 hli (10 nti) hauv txoj kab uas hla, tab sis tsis yog qhov yuav tsum tau ua.
Tag nrho cov kav dej yuav tsum tsis muaj qhov tsis zoo thiab yuav tsum muaj qhov tiav zoo li tus neeg ua haujlwm.
Cov qhov tsis zoo ntawm qhov chaw yuav tsum raug cais ua qhov tsis zoo thaum lawv qhov tob txo cov phab ntsa seem kom tsawg dua 90% ntawm cov phab ntsa tuab uas tau teev tseg.
Cov qhov tsis zoo txog li 33% ntawm qhov tuab ntawm phab ntsa uas tau teev tseg hauv qhov tob yuav raug tshem tawm tag nrho los ntawm kev txiav lossis sib tsoo kom tiav cov hlau.
Yog tias siv cov khoom siv vuam, yuav tsum siv cov txheej txheem vuam ntub thiab cov hlau vuam uas tawm los yuav tsum raug tshem tawm kom tswj tau qhov chaw du.
Cov teeb meem ntawm qhov chaw, xws li cov cim kov, cov pwm me me lossis cov cim dov, lossis cov qhov ntiav, tsis suav tias yog cov teeb meem yog tias lawv tuaj yeem tshem tawm hauv qhov tuab ntawm phab ntsa uas tau teev tseg.
Cov ntaub ntawv hauv qab no yuav tsum muaj xws li:
Lub npe ntawm tus neeg tsim khoomQhov no tuaj yeem yog lub npe tag nrho ntawm tus neeg tsim khoom lossis lub npe luv.
Hom lossis Lub Cim Lag LuamLub npe lag luam lossis cov cim lag luam uas tus neeg tsim khoom siv los qhia qhov txawv ntawm nws cov khoom.
Tus Qauv Qhia Txog Kev SivASTM A500, uas tsis tas yuav suav nrog xyoo luam tawm.
Tsab Ntawv QibQib B, C lossis D.
Rau cov kav dej uas muaj txoj kab uas hla ≤ 100 hli (4 nti), cov ntawv lo tuaj yeem siv los cim cov ntaub ntawv qhia txog tus kheej kom meej.
Feem ntau siv rau cov hom phiaj ntawm kev tsim kho, nws muab lub zog kho tshuab thiab kev sib txuas ua ke kom txhawb nqa kev tsim qauv thiab kev tsim kho ntawm cov qauv vaj tsev thiab kev tsim kho.
Cov yeeb nkab hlau no siv dav hauv kev tsim cov thav duab, cov choj, cov chaw lag luam, thiab ntau yam khoom siv uas xav tau lub zog thiab kev ruaj khov.
ASTM A370: Cov Txheej Txheem Xeem thiab Cov Lus Txhais rau Kev Xeem Tshuab ntawm Cov Khoom Hlau.
ASTM A700: Phau Ntawv Qhia rau Kev Ntim Khoom, Kev Cim, thiab Kev Thauj Khoom rau Cov Khoom Hlau rau Kev Xa Khoom.
ASTM A751: Cov Txheej Txheem Xeem thiab Kev Xyaum rau Kev Tshuaj Xyuas Tshuaj ntawm Cov Khoom Hlau.
ASTM A941 Cov Lus Hais Txog Hlau, Hlau Stainless, Cov Alloys Sib Xws, thiab Ferroalloys.
Raws li cov neeg siv khoom xav tau, kev kho mob tiv thaiv xeb ntawm cov yeeb nkab hlau tuaj yeem ua tiav ntau txoj hauv kev sib txawv los txhim kho nws txoj kev tiv thaiv xeb thiab ua kom nws lub neej ntev.
Xws li cov kua roj vanish, xim, galvanization, 3PE, FBE, thiab lwm txoj kev.
Peb yog cov chaw tsim khoom thiab cov chaw muag khoom ntawm cov yeeb nkab carbon steel zoo los ntawm Tuam Tshoj, thiab peb kuj yog cov chaw muag khoom ntawm cov yeeb nkab steel seamless, muab ntau yam kev daws teeb meem rau koj!
Yog tias koj xav paub ntau ntxiv txog cov khoom yeeb nkab hlau, koj tuaj yeem tiv tauj peb!
