Lub ntsiab
A672yog ib tug neeg Asmeskas tus qauv los ntawmASTM International(yav tas los Asmeskas haiv neeg rau kev sim thiab cov ntaub ntawv). Nws cov npe tag nrho yog"Txheem cov qauv rau hluav taws xob - fusion {{} welded steel yeeb nkab kev pabcuam kub ntxhov."
Tus "LSAW" (Longitudinal submerged arc vuam) ib feem yog qhov tseem ceeb heev. Nws qhia cov txheej txheem tsim khoom siv los tsim cov yeeb nkab. Thaum lub ATTM A672 tus qauv tuaj yeem, npog Lwm yam hluav taws xob fusion vuam cov txheej txheem, nws yog feem ntau cuam tshuam nrogLsaw cov yeeb nkabrau txoj kab uas loj loj.
Cov yam ntxwv tseem ceeb ntawm A672 LSAWAS
Cov txheej txheem tsim khoom (LSAW):
Cov phiaj hlau hlau (Skelp) yog thawj tsim rau hauv ib qho U {{}} {kua xees}} {}}} {}}}}} {}}} {}}}}}}}}}} {} ing ing, nthuav dav).
Lub longitudinal seam yog welded sab hauv thiab sab nraud siv lubSubmerged Arc Vuam (pom)txheej txheem. Qhov no tsim ib tug muaj zog, txhim khu kev qha, thiab txuas ntxiv weld.
Cov txheej txheem no zoo tagnrho rau kev ua loj - txoj hauj lwm uas hla tshaj plaws (feem ntau los ntawm 16 ntiv tes.
Cawmsab thiab kev pab cuam:
High - pa siab kev pab:Tsim los ntawm cov kua dej lossis roj hauv qab lub siab sab hauv.
Kub kub:Feem ntau npaj rau kev pabcuam kub txog800℃f (425 degree)Cov. Rau qhov kub siab dua, lwm cov lus qhia zoo ib yam li ATM A691 yuav tsim nyog dua.
Kev Kho Cua Sov:
Ib qho tseem ceeb ntawm A672 cov yeeb nkab yog tias nws ib txwm muab rau hauvThaum tshav kub kub -} kho mobCov. Cov hom kev kho cua sov tshwj xeeb (piv txwv li, kev nyuaj siab- Risix (piv txwv li ntawm A672 Qib B Chav Kawm 13, qhov twg "" "ua rau" npau taws). Qhov no ua kom cov khoom siv tshuab ua kom zoo nkauj yog cov khoom sib txawv thiab cov kev ntseeg siab los ntawm vuam yog relieved.
Cov qauv qib thiab cov chav kawm
Qhov kev qhia tshwj xeeb suav nrog ntau qib raws li cov qib ntsuas, nrog ntau cov chav kawm raws li kev kho cua sov thiab cov neeg kho tshuab.
Cov Qib:Txhais los ntawm cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov hlau. Cov qib kawm muaj xws li:
Qeb A:Cov Hlau Hlau
Qib B:Carbon -} manganese steel
Qib C:Carbon {- manganese steel (siab dua mn dua b)
Qib D los ntawm H:Ntau yam qis -} cov hlau alloy (piv txwv li, nrog ntxiv ntawm chromium, npib tsib xee, molybdenum).
Cov Chav Kawm:Txhais tau los ntawm qhov kev txiav txim siab tsawg kawg zog zog (smys) thiab cov txheej txheem kev kho cua sov. Cov chav kawm feem ntau cov smys hauv KSI (KIPS rau ib square nti). Piv txwv li:
Hoob 12:30,000 Psi Min paib lub zog (205 mpa)
Chav Kawm 13:35,000 psaib Min paib zog (240 MPA)
Chav Kawm 42:42,000 Psi Min paib zog (290 MPA)
Hoob 45:45,000 Psi Min paib zog (310 mpa)
Chav Kawm 50:50,000 Psi Min tawm txiaj lub zog (345 mpa)
Chav Kawm 55:55,000 Psi Min paib zog (380 MPA)
Kawm 60:60,000 psi Min paib zog (415 MPA)
Chav Kawm Ntawv 65:65,000 Psi Min paib zog (450 MPA)
Ib qho kev qhia tshwj xeeb yuav zoo li: ASTM A672 qib B chav kawm 45(Ib tug carbon -} manganese steel yeeb nkab, cua sov {1}-}} {} nrhiav kom muaj zog ntawm 45,000 psi).
Cov Kev Siv Raug Raug
A672 LSAWaw kav yog siv nyob rau hauv qhov siab tseem ceeb - qhov kev thov siab qhov twg kev ntseeg tau yog qhov kev ntseeg tau:
Pipeline kis cov kab:Rau roj thiab nkev, ob leeg onshore thiab sab ntug.
Lub hwj huam nroj tsuag:Rau siab - qhov kab kev ua si, cov roj condenser, thiab lwm cov khoom piping.
Petrochemical Nroj Tsuag:Nyob rau hauv cov txheej txheem kab yuav tsum muaj lub zog siab thiab siab ua.
Dej Kis Tau Dej:Rau qhov loj - txoj kab uas hla, siab-} siab dej loj.
Kev sib piv nrog lwm cov qauv yeeb nkab
| Yam zoo | AV A672 (LSAW) | ASTM A53 (ERW / SSAW) | API 5L (PSL1 / PSL2) | ASTM A106 (Seamless) |
|---|---|---|---|---|
| Kev ua | Longitudinal Submerged Arc Weld | Hluav Taws Xob Ua Kom Weld / Kauv Kaw | Seamless, ERW, HFI, DSAW | Seamless (kub - ua tiav) |
| Loj heev | Txoj kab uas loj loj (16 "thiab siab dua) | Me me rau cov taub loj | Tag Nrho Muaj | Me me rau Nruab Nrab Hla |
| Qhov tseem ceeb lub hom phiaj | High - qhov siab, muaj ntsis nruab nrab | Lub Hom Phiaj Dav Dav, Tsawg / Kho Siab | HydroCarbon kis tau | High - kev pab kub |
| Lub Zog Txheej Txheem | Ntau cov chav kawm (piv txwv li, Chav Kawm 45, 55) | Qeb A & B | Cov qhab nia B rau X80 | Qeb A, B, C |
| Tus nqi | Nruab nrab - siab (phaj -} raws cov txheej txheem) | Tsawg (A53) rau nruab nrab (LSAW) | Sib txawv los ntawm hom thiab qib | Siab |
Lub ntsiab
Hauv ntej,ASTM A672 LSAWW STEEL YEEYog lub siab - Zoo, loj} - dadeer structured los ntawm steel weld. Nws yuav tsum tau kho tshav ntuj sov thiab kev sim ua kom nws tau txais txiaj ntsig zoo hauv lub zog, petrochemical, thiab kav dej kev lag luam. Thaum koj pom "A672," koj paub nws hais txog aThaum tshav kub kub -} nrhiav, longitudinally weldedyeeb nkab rau kev pabcuam tseem ceeb.
