ASTM A671 CC60 Class 73 Pipe yog dab tsi?
ASTM A671 CC60 Class 73 yeeb nkab yog ib qho hluav taws xob - fusion-welded (EFW) steel yeeb nkab ua los ntawm lub siab- lub nkoj- zoo phaj, nrog cov hlau muab tub lim ntxiv ntawm qhov ntev seam. Nws zaum hauv ASTM A671/A671M, qhov tshwj xeeb rau EFW yeeb nkab hauv atmospheric thiab qis dua - qhov kub thiab txias, thiab yog tsim nyob rau hauv qhov loj - txoj kab uas hla feem ntau txuam nrog headers thiab chaw nres tsheb piping.
Qhov kev xaiv cais peb qhov kev txiav txim siab: CC npe rau qib ntawv pawg thiab yog li cov cua sov-kev kho thiab cuam tshuam- txoj kev xeem, 60 muab qhov tsawg kawg nkaus tensile lub zog nyob rau hauv ksi (414 MPa), thiab Chav Kawm 73 txheeb xyuas cov khoom siv phaj thiab cov kev xeem uas tau xaiv los ntawm lub rooj txiav txim ntawm qhov kev qhia tshwj xeeb.
Cov lej qib siab hauv qhov kev qhia tshwj xeeb no feem ntau raug txiav txim siab qhov twg cov kab yog tuab phab ntsa thiab qhov kev pabcuam kub qis, yog li lub zeb ua haujlwm tseem ceeb ntawm kev sib txuas zoo thoob plaws lub seam, qhov sib xws, thiab kev cuam tshuam tus cwj pwm ntawm qhov ntsuas kub tau teev nyob rau hauv qhov kev txiav txim.
Qib, Chav Kawm thiab Kev Xeem Xeem
| Yam khoom | Kev xav tau |
|---|---|
| Specification | ASTM A671 / A671M, EFW yeeb nkab rau atmospheric thiab qis dua |
| Qib | CC60, qib ntawv pawg CC nrog 60 ksi (414 MPa) qib tensile yam tsawg kawg nkaus |
| Chav kawm | Chav Kawm 73, cov khoom siv phaj thiab kuaj mob los ntawm A671 lub rooj xaj |
| Seam | Longitudinal seam welded nrog muab tub lim hlau, ib leeg lossis ob chav welded |
| Toughness | Charpy V-qhov ntsuas qhov cuam tshuam ntawm qhov ntsuas qhov ntsuas kub |
| Weld xeem | Radiographic lossis ultrasonic kuaj hla tag nrho seam |
| Kev ntsuas siab | Kev ntsuam xyuas hydrostatic raws li qhov tshwj xeeb tshwj tsis yog raug txiav txim |
| Qhov xwm txheej | Raws li -welded, kev nyuaj siab-relieved los yog normalized raws li tau txiav txim |
Vim tias qib qib raug kho ntawm 60 ksi, cov txiaj ntsig tensile poob rau hauv ib qho kev kwv yees, thiab qhov sib txawv ntawm kev ua haujlwm yog qhov cuam tshuam ntawm qhov ntsuas kub ua ke nrog cov ntaub ntawv soj ntsuam weld. Ob leeg yuav tsum tau thov nrog cov khoom xa tuaj, txij li cov yeeb nkab header feem ntau yog welded rau ntawm qhov chaw thiab cov ntaub ntawv zeb yog ib feem ntawm cov fabrication pob.
Kev tsim khoom, vuam thiab tshuaj xyuas
Phaj yog txiav, edged, tsim thiab dov mus rau lub txiav txoj kab uas hla, tom qab uas lub longitudinal npoo yog npaj thiab lub seam welded nrog muab tub lim hlau raws li ib tug tsim nyog cov txheej txheem. Txoj kab uas hla, phab ntsa thickness, tawm - ntawm - roundness, straightness thiab kawg npaj yog ntsuas ua ntej kuaj.
Radiographic lossis ultrasonic kuaj npog tag nrho cov seam. Kev kho, yog tias tsim nyog, raug txwv los ntawm cov kev qhia tshwj xeeb thiab rov- tshuaj xyuas raws li cov qauv qub. Kev ntsuas hydrostatic ua tiav cov kab ke, thiab kev kho cua sov hauv li -welded, kev ntxhov siab- tau txais kev kho mob los yog kev ua haujlwm zoo yog siv qhov kev txiav txim thiab sau rau ntawm daim ntawv xeem.
Tsawg-Tub kub taub hau thiab chaw nres tsheb Piping
CC60 Class 73 yeeb nkab yog siv rau qis - kub headers, manifold khiav, chaw nres tsheb piping thiab hloov kab nyob rau hauv liquefied gas tuav, roj ua thiab tub yees cog, thiab rau kev sib txuas ntawm txias- sab cov khoom uas ntev welded lengths txo tus naj npawb ntawm girth welds ua rau ntawm qhov chaw.
Header lub luag hauj lwm muab nqi zog rau EFW hom: txoj kab uas hla thiab phab ntsa tuaj yeem sib phim rau cov dej ntws thiab lub luag haujlwm siab ntawm lub phaj, lub seam yog weld soj ntsuam los ntawm lub zeb, thiab kev ntsuam xyuas cuam tshuam ntawm cov qauv hlau kub cov ntaub ntawv lub toughness cov kev pab cuam yuav tsum tau.
Ordering, Inspection thiab Handling Notes
Lub xeev specification, qib, chav kawm, qhov loj me, phab ntsa, ntev thiab cuam tshuam qhov ntsuas kub ntawm qhov kev txiav txim.
Paub meej tias cov cua sov-kev kho mob ua ntej dov, yog li cov txiaj ntsig cuam tshuam nrog cov yeeb nkab xa.
Yuav tsum muaj daim ntawv qhia txog -seam weld test reports and hydrostatic test records with each shipping.
Tshawb xyuas txoj kab uas hla, phab ntsa thiab roundness raws qhov ntev thaum tau txais kev tshuaj xyuas.
Khaws qhov kawg tiv thaiv thiab tsis txhob stacking yeeb nkab kom lub seam nqa lub load.
FAQ
Q: Chav Kawm 73 qhia li cas?
Kev nkag mus rau hauv chav kawm xaiv cov khoom siv phaj thiab kuaj mob los ntawm lub rooj txiav txim ntawm ASTM A671; nws tau hais nrog rau qib thiab yeej tsis hloov pauv rau nws.
Q: Puas yog qib CC60 muaj zog txaus rau headers?
60 ksi yam tsawg kawg nkaus tensile qib yog dav siv rau txias - kev pab cuam headers thiab chaw nres tsheb piping, qhov twg toughness thiab weld zoo teeb meem ntau npaum li lub zog.
Q: Kev ntsuam xyuas cuam tshuam li cas?
Charpy V-Kev ntsuas qhov ntsuas kub yog ua tiav ntawm qhov ntsuas kub uas tau teev tseg hauv daim ntawv xaj yuav khoom, thiab cov txiaj ntsig tau muab nrog cov yeeb nkab.
Q: Cov kev xeem twg lub tshuab ua haujlwm?
Radiographic los yog ultrasonic kuaj ntawm tag nrho longitudinal seam ntxiv rau kev kuaj hydrostatic ntawm cov yeeb nkab tiav, nrog rau cov ntaub ntawv muab rau tus neeg yuav khoom.
Q: Cov yeeb nkab puas tuaj yeem raug xa mus rau normalized?
Kev ua kom zoo, txo kev ntxhov siab lossis raws li - cov khoom siv vuam tuaj yeem raug txiav txim los ntawm cov kev xaiv tshwj xeeb thiab cov xwm txheej siv tau tshwm sim hauv daim ntawv xeem.
