ASTM A672 npog hluav taws xob fusion welded steel yeeb nkab rau kev pabcuam siab ntawm qhov kub nruab nrab. Qib C70 thiab CL22 chav kawm ua ke piav qhia txog carbon manganese yeeb nkab nrog 70 ksi yam tsawg kawg nkaus tensile lub zog thiab cov txheej txheem tsim khoom, tshuaj xyuas, thiab kev sim. EFW yeeb nkab ntawm chav kawm no yog ib txoj hauv kev zoo rau seamless thaum xav tau cov kab loj loj, vim tias cov vuam yog tsim los ntawm cov phaj nrog kev tswj cov chemistry thiab tag nrho cov ntsuas volumetric.
Nkag siab txog C70 CL22 Tus Qauv
C70 feem ntawm qhov kev xaiv yog hais txog lub zog ntawm cov hlau, nrog rau qhov tsawg kawg nkaus yield zog ntawm 485 MPa lossis 70 ksi thiab tensile ntau ntawm 485 txog 620 MPa. Cov chav kawm CL22 qhia txog qib kev tsim khoom thiab tshuaj xyuas: cov yeeb nkab hauv chav kawm 22 yog tsim los nrog cov vuam seam tsim los ntawm cov khoom siv hluav taws xob fusion vuam thiab raug rau kev kho cua sov thiab tsis yog - kev ntsuam xyuas kev puas tsuaj raws li tus qauv. Kev sib xyaw ua ke txhais tau hais tias cov yeeb nkab tsim nyog rau kev pabcuam siab qhov twg welded seam tau txais thiab qhov twg carbon steel khoom ua tau raws li cov qauv tsim.
Tshuaj muaj pes tsawg leeg
| Element | CC70 / C70 Qib txwv, feem pua |
|---|---|
| Cov pa roj carbon | 0.27 max |
| Manganese | 0.79-1.30 Nws |
| Phosphorus | 0.035 max |
| Sulfur | 0.035 max |
| Silicon | 0.13-0.45 Nws |
Cov pa roj carbon manganese tau khaws cia nyob rau hauv nruj txwv kom lub hauv paus phaj thiab lub vuam ob leeg ncav cuag lub zog yuav tsum tsis muaj kev cuam tshuam weldability. Cov phosphorus thiab sulfur caps tswj kev suav nrog thiab ua kom thaj chaw vuam huv si, uas tseem ceeb rau hydrostatic thiab tsis yog - kuaj kev puas tsuaj.
Mechanical Properties
| Khoom | Kev xav tau |
|---|---|
| Yield zog | 260 MPa yam tsawg kawg nkaus |
| Tensile zog, puag hlau | 485 rau 620 MPa |
| Elongation | 21 feem pua yam tsawg kawg nkaus |
| Weld tensile zog | 485 rau 620 MPa |
Cov kev cai tensile yuav tsum siv rau lub hauv paus hlau, thiab ib tug transverse weld tensile xeem paub meej tias cov seam yog tsawg kawg yog muaj zog raws li lub phaj. Qhov kev txheeb xyuas lub zog vuam no yog ib qho ntawm cov laj thawj EFW yeeb nkab tau txais hauv cov tshuab siab uas ERW yeeb nkab yuav tsis raug tso cai.
Kev tsim khoom thiab kev kho cua sov
C70 CL22 yeeb nkab yog tsim los ntawm phaj rau hauv lub tog raj kheej, tom qab ntawd qhov sib koom ua ke ntev raug kaw los ntawm kev sib koom ua ke arc vuam lossis electrofusion vuam. Tom qab vuam, cov yeeb nkab yog kho cua sov raws li qhov yuav tsum tau ua los ntawm cov chav kawm, nrog normalizing txoj hauv kev rau qib no lub zog. Kev kho cua sov rov ua kom lub tshav kub cuam tshuam thiab lav tag nrho lub zog thiab toughness ntawm thaj chaw weld. Cov yeeb nkab tiav yog kuaj hydrostatically thiab cov seam yog kuaj los ntawm radiography lossis ultrasonic txoj kev raws li tus qauv.
Daim ntawv thov los ntawm Kev Lag Luam
CL22 yeeb nkab yog engineered rau nruab nrab thiab siab siab, tsis yog - kub kub kev pab cuam. Nyob rau hauv refineries nws tshwm nyob rau hauv hydrodesulfurization chav tsev piping thiab ethylene cog chav kab. Fais fab nroj tsuag siv nws rau boiler feedwater piping thiab pov tseg tshav kub rov qab systems. Fertilizer nroj tsuag qhia nws rau syngas compressor piping, thiab cua sib cais units siv nws rau nruab nrab siab nitrogen hloov kab. Nyob rau hauv txhua rooj plaub, tus tsim lub siab nyob twj ywm nyob rau hauv lub hnab ntawv carbon steel thiab qhov kub thiab txias nyob rau hauv qab ntawm lub point uas creep tswj tus tsim.
FAQ
CL22 txhais li cas hauv ASTM A672?
CL22 yog cov chav kawm tsim rau hluav taws xob fusion welded yeeb nkab nrog cov kev kho cua sov thiab kev sim ntsuas. Cov chav kawm tswj xyuas seb cov yeeb nkab tau tsim li cas, tshuaj xyuas, thiab sim dhau qhov yuav tsum tau ua hauv qib qib.
Puas yog A672 C70 CL22 yeeb nkab seamless lossis welded?
Nws yog welded yeeb nkab. Lub longitudinal seam yog tsim los ntawm hluav taws xob fusion vuam, feem ntau submerged arc vuam, los ntawm cov phaj tsim. Seamless tsis yog ib feem ntawm A672 khoom daim ntawv.
Qhov txawv ntawm A672 thiab A671 yeeb nkab yog dab tsi?
Ob leeg yog hluav taws xob fusion welded siab yeeb nkab qauv. A671 npog cov pa roj carbon steel yeeb nkab raws li cov qib siab zog, thaum A672 npog cov yeeb nkab uas nws muaj pes tsawg leeg thiab cov khoom raug khi rau cov khoom siv tshwj xeeb.
C70 CL22 yeeb nkab puas tuaj yeem siv siab dua 400 degrees Celsius?
Tus qauv yog npaj rau kev pabcuam kub nruab nrab. Tshaj li qhov ntsuas kub ntawm cov pa roj carbon steel, lub zog nkag tsis tau lees paub thiab yuav tsum xaiv qib chromium molybdenum.
Cov kev ntsuam xyuas dab tsi yog qhov yuav tsum tau ua rau CL22 yeeb nkab?
Kev xeem yuav tsum muaj xws li kev sim tensile ntawm lub hauv paus hlau thiab vuam, hydrostatic testing ntawm txhua qhov ntev, thiab tsis yog -kev kuaj xyuas ntawm cov vuam seam. Kev kuaj ntxiv tuaj yeem pom zoo nrog tus neeg yuav khoom.
Qhov ntau thiab tsawg muaj nyob rau hauv C70 CL22 EFW yeeb nkab?
Vim hais tias cov yeeb nkab yog tsim los ntawm phaj, diameters feem ntau pib nyob ib ncig ntawm 400 mm thiab txuas mus rau 2500 mm los yog ntau tshaj, nrog phab ntsa thicknesses li ntawm 6 mm mus rau 50 mm nyob ntawm lub phaj muaj.
