A671 CJA115 Class 30 Pipe yog dab tsi?
ASTM A671 CJA115 Chav Kawm 30 yog ib qho hluav taws xob - fusion-welded carbon steel yeeb nkab tsim los rau qis - kev pabcuam kub. Cov yeeb nkab yog tsim los ntawm lub siab- nkoj- phaj zoo: lub phaj yog tsim rau hauv lub tog raj kheej thiab cov seam ntev yog welded nrog cov hlau muab tub lim ntxiv thaum lub sij hawm hluav taws xob fusion vuam txheej txheem. Nyob rau hauv lub npe A671, CJA115 txheeb xyuas cov ntaub ntawv qib, uas nws chemistry thiab mechanical zog yog feem ntau hla- hais txog ASTM A537 Class 1 phaj, thiab Class 30 txhais cov qib xeem ntawm cov yeeb nkab tiav, yuav tsum tau 100 feem pua txoj kev kuaj hluav taws xob ntawm lub vuam seam.
Khoom Qib CJA115
Qib CJA115 yog cov pa roj carbon monoxide-manganese steel nrog kev tswj hwm muaj pes tsawg leeg, tsim los rau kev pabcuam ntawm qhov kub thiab txias. Nws cov chemistry feem ntau piv nrog ASTM A537 Chav Kawm 1, uas txwv cov pa roj carbon monoxide li 0.24 feem pua thiab manganese mus rau thaj tsam ntawm 0.70 txog 1.35 feem pua. Kev kho cua sov normalization ua kom zoo -cov qauv zoo nrog cov tawv tawv zoo, thiab cov hlau raug txheeb xyuas los ntawm Charpy qhov kev ntsuam xyuas qhov kub thiab txias.
| Khoom | Yam yuav tsum tau muaj |
|---|---|
| Tsawg kawg tensile zog | 70 ksi rau 90 ksi ntau yam, sib npaug rau 485 rau 620 MPa |
| Yam tsawg kawg yield zog | 50 ksi, sib npaug rau 345 MPa |
| Kev sim cuam tshuam | Charpy V-notch ntawm qhov kub thiab txias |
| Carbon, siab tshaj | Txog 0.24% |
| Manganese | 0.70% rau 1.35% |
Chav Kawm 30 Yuav tsum muaj dab tsi
Nyob rau hauv ASTM A671 chav kawm system, chav kawm tus lej tswj kev tsim khoom thiab kev sim cov yeeb nkab. Chav kawm 30 yuav tsum tau 100 feem pua ntawm radiographic kuaj ntawm longitudinal weld seam, uas paub tseeb tias cov weld tsis muaj qhov tseem ceeb hauv kev cuam tshuam. Ua ke nrog rau qhov cuam tshuam -cov khoom siv hauv paus, qhov kev ntsuam xyuas no ua rau Chav Kawm 30 haum rau qhov kev pabcuam qis - kub siab.
Manufacturing thiab Test Sequence
Lub phaj yog tsim rau hauv ib lub tog raj kheej, thiab qhov ntev seam yog kaw los ntawm hluav taws xob fusion vuam nrog muab tub lim hlau. Cov yeeb nkab yog tom qab ntawd kho cua sov los ntawm normalizing, tshuaj xyuas los ntawm tag nrho cov radiography ntawm vuam, thiab kuaj hydrostatically. Kev ntsuam xyuas cov tshuab kuaj xyuas lub zog tensile thiab Charpy qhov cuam tshuam qhov tseem ceeb ntawm qhov ntsuas kub, thiab tag nrho cov txiaj ntsig tau sau tseg rau hauv daim ntawv qhia txog kev xeem.
Tej kev siv
A671 CJA115 Class 30 yeeb nkab yog siv nyob rau hauv cryogenic systems, LNG terminals, refrigerated cia, thiab qis - kub txheej txheem piping nyob rau hauv lub petrochemical kev lag luam. Nws kuj tshwm sim nyob rau hauv siab - cov kab hluav taws xob siab nyob rau hauv cov huab cua txias thiab hauv cov kav dej fais fab uas qhov ntsuas kub tsis txaus yuav tsum tau ua kom pom tseeb. Kev sib xyaw ua ke ntawm cov phaj zoo li qub, kev sim cuam tshuam, thiab tag nrho cov duab hluav taws xob muab cov yeeb nkab ua tiav cov ntaub ntawv zoo rau kev pabcuam tseem ceeb.
FAQ
CJA115 txhais li cas hauv ASTM A671?
CJA115 yog qib kev xaiv hauv A671 system. Cov qib txheeb xyuas cov pa roj carbon monoxide-manganese steel uas nws cov chemistry thiab cov khoom muaj feem ntau hla- siv nrog ASTM A537 Chav Kawm 1 siab- cov phaj phaj.
Dab tsi yog qhov txawv ntawm Chav Kawm 30 thiab Chav Kawm 10 hauv A671?
Chav kawm 30 xav tau 100 feem pua ntawm kev kuaj hluav taws xob ntawm qhov ntev ntawm qhov vuam, thaum cov lej qis qis tau txo qis lossis xaiv qhov kev xeem. Cov lej qib siab dua muab kev txheeb xyuas ntau dua ntawm cov khoom siv vuam zoo.
Qhov ntsuas kub ntawm qhov ntsuas qhov cuam tshuam li cas?
Charpy V- qhov ntsuas qhov cuam tshuam tau ua tiav ntawm qhov ntsuas kub qis rau qhov kev pabcuam, thiab qib raug xaiv kom cov yeeb nkab khaws cov ductility ntawm qhov tsawg kawg nkaus tsim hlau kub.
Puas yog CJA115 yeeb nkab haum rau LNG kev pabcuam?
Yog lawm. Cov pa roj carbon monoxide-manganese steel nrog cov ntawv pov thawj qis- qhov kub thiab txias yog siv nyob rau hauv LNG davhlau ya nyob twg piping thiab lwm yam cryogenic systems uas qhov ntsuas kub tsim nyob rau hauv qib ntau.
Cov yeeb nkab puas tuaj yeem welded hauv thaj teb?
Yog lawm. Girth welds yog tsim los ntawm cov txheej txheem tsim nyog, thiab cov khoom siv vuam thiab cov khoom siv hluav taws xob tau tswj xyuas kom muaj qhov qis - qhov kub thiab txias ntawm qhov sib koom ua ke.
Cov ntaub ntawv twg yog muab?
Cov ntawv xeem Mills sau cov tshuaj muaj pes tsawg leeg, tensile thiab cuam tshuam cov khoom, kev kho cua sov, radiography, thiab hydrostatic test tau rau txhua qhov ntau.
