ASTM A671 CC60 txhais tau li cas
ASTM A671 yog tus qauv rau hluav taws xob - fusion-welded (EFW) carbon steel yeeb nkab rau atmospheric thiab qis dua - kev pab kub. Cov yeeb nkab yog tsim los ntawm kev tsim cov hlau phaj rau hauv lub tog raj kheej thiab vuam qhov ntev seam los ntawm tsis siv neeg submerged arc vuam. Nyob rau hauv lub npe CC60, cov ntawv CC txheeb xyuas cov phaj specification, uas yog A537 Chav Kawm 1, thiab tus naj npawb 60 yog qhov tsawg kawg nkaus tensile lub zog ntawm cov yeeb nkab tiav hauv ksi, sib npaug li 415 MPa. Tib yam yuav tsum tau luam tawm raws li ASME SA-671 rau kev siv boiler thiab lub nkoj siab.
Tus nab npawb
Tus naj npawb ntawm cov chav kawm hauv A671 tus qauv qhia txog kev kho cua sov ntawm cov yeeb nkab tiav, tsis yog qhov ntsuas siab. Cov chav kawm khiav ntawm 10 mus rau 80: Chav Kawm 10 yog muab tsis tau tom qab-weld heat treatment; cov chav kawm siab dua ntxiv kev ntxhov siab, normalizing, normalizing thiab tempering, los yog quenching thiab tempering. Cov chav kawm yog xaiv los ntawm tus neeg yuav khoom los ntawm qhov kev pabcuam kub thiab cov qauv tsim. Cov qauv tsim xws li Chav Kawm 42 tsis tau txhais nyob rau hauv tus qauv, thiab kev ntsuas siab tsis yog ib feem ntawm A671 qhov kev xaiv; Lub siab tso cai yog xam los ntawm phab ntsa tuab thiab cov qauv tsim, xws li ASME BPVC Tshooj VIII lossis cov kav dej siv tau.
| Ib feem | Lub ntsiab lus rau CC60 |
|---|---|
| Qib ntawv CC | Plate phaj rau ASTM A537 Chav Kawm 1 |
| Number 60 | Tsawg tensile zog 60 ksi (415 MPa) |
| Chav Kawm 10–80 | Kev kho cua sov ntawm cov yeeb nkab welded |
Plate Material thiab Chemistry
Lub phaj siv rau CC60 yog A537 Chav Kawm 1, raug tua, nplua - nplej, weldable carbon steel nrog qhov tsawg kawg nkaus lub zog ntawm 50 ksi (345 MPa) thiab tensile ntau ntawm 70 mus rau 90 ksi rau phaj thicknesses txog 2.5 nti. Nws muaj pes tsawg leeg yog tswj nrog siab tshaj plaws hauv cheeb tsam ntawm 0.24% carbon, 0.70 mus rau 1.60% manganese, 0.035% phosphorus, thiab 0.035% sulfur. Lub phaj raug tua tag nrho thiab ua kom zoo- kev xyaum ua qoob loo, uas muab kev sib xyaw ua ke ntawm lub zog thiab lub zog uas xav tau rau nruab nrab thiab qis dua - qhov kub thiab txias.
Manufacturing thiab Quality
Cov yeeb nkab yog txias- tsim los ntawm phaj, thiab qhov ntev seam yog welded los ntawm ob -sab submerged arc vuam. Tom qab vuam, cov yeeb nkab tau txais kev kho cua sov uas yuav tsum tau ua los ntawm cov chav kawm thiab tom qab ntawd ncaj nraim thiab xaus - npaj. Kev ntsuam xyuas suav nrog kev sim tensile ntawm cov hlau hauv paus thiab cov vuam, cov kev ntsuas khoov ntawm cov vuam, kev ntsuas hydrostatic, thiab tsis yog- kev kuaj xyuas ntawm cov vuam seam, nrog rau qhov ntawm radiography pom zoo rau cov kev pabcuam. Rau qis- qhov kev pabcuam kub, Charpy V- qhov ntsuas qhov cuam tshuam tau teev nrog qhov ntsuas qhov ntsuas kub thiab lub zog tsim los ntawm tus qauv tsim. Daim ntawv pov thawj zeb sau cov phaj ntsuas cua sov, cov txiaj ntsig kho tshuab, cov ntaub ntawv kho cua sov, thiab cov txiaj ntsig NDE.
Kev Pabcuam Scope
A671 yeeb nkab yog siv rau loj - txoj kab uas hla ntawm cov kav dej hauv refineries, petrochemical nroj tsuag, chaw nres tsheb fais fab, thiab cov tub yees txias, ntawm qhov kev pab cuam kub txog li -50 F (-45 C) rau cov qib kev cuam tshuam. Nws tsis yog tsim los rau kev ntxhov siab heev; Cov khoom siv hluav taws xob siab EFW yog them los ntawm tus khub tus qauv A672. Yog li ntawd, cov neeg yuav khoom yuav tsum xyuas kom meej tias txhua qhov kev piav qhia ntawm qib sib haum rau tus qauv: cov ntawv qib thiab tus lej muaj zog txheeb xyuas cov phaj thiab cov chav kawm tensile, thiab cov chav kawm qhia txog kev kho cua sov.
Cov lus nug nquag
Q: A671 CC60 yog dab tsi?
Ib qho hluav taws xob -fusion-welded carbon steel yeeb nkab ua los ntawm A537 Class 1 phaj, nrog lub zog tensile yam tsawg kawg nkaus ntawm 60 ksi (415 MPa), muab rau atmospheric thiab qis dua - qhov kub thiab txias.
Q: Tus naj npawb ntawm chav kawm txhais li cas?
Chav kawm txhais cov kev kho cua sov ntawm cov yeeb nkab tiav, los ntawm Chav Kawm 10 yam tsis muaj kev tshaj tawm -weld heat treatment mus rau Class 80 quenched thiab tempered. Nws tsis yog qhov ntsuas siab.
Q: Puas yog Chav Kawm 42 yog chav kawm A671 siv tau?
No. A671 chav kawm yog 10, 20, 30, 40, 50, 60, 70, thiab 80. Cov lej xws li 42 tsis yog ib feem ntawm tus qauv.
Q: Dab tsi phaj siv rau CC60?
ASTM A537 Chav Kawm 1, raug tua raug nplua -cov pa roj carbon steel phaj nrog qhov muaj zog tsawg kawg nkaus ntawm 50 ksi.
Q: CC60 puas tuaj yeem siv rau qhov kub thiab txias?
Yog, nrog rau qhov kev ntsuam xyuas tau teev rau qhov ntsuas kub tsim. Qhov kev txwv txwv nyob ntawm qib, chav kawm, thiab lub zog Charpy xav tau.
Q: Qhov txawv ntawm A671 thiab A672 yog dab tsi?
A671 npog EFW yeeb nkab rau atmospheric thiab qis dua -kev pabcuam kub; A672 npog tib tsev neeg cov khoom rau siab - kev pabcuam siab ntawm qhov kub nruab nrab.
