ASTM A358 yog dab tsi?
ASTM A358, raug cai A358/A358M, npog hluav taws xob -fusion-welded austenitic chromium-nickel stainless hlau yeeb nkab rau siab- kub thiab kev pabcuam corrosive. Cov yeeb nkab yog tsim los ntawm phaj thiab welded nrog cov hlau muab tub lim siv tsis siv neeg lossis ib nrab- cov txheej txheem tsis siv neeg, nrog rau cov khoom siv vuam zoo tswj los ntawm chav kawm.
Cov kev qhia tshwj xeeb suav nrog cov qib sib xws suav nrog 304, 304L, 316, 316L, 321 thiab 347, ntxiv rau H variants rau siab - qhov kub thiab txias.
Nkag siab Cov Chav Kawm
| Chav kawm | Weld Examination | Kev txhawb zog | Qib zoo |
|---|---|---|---|
| Chav Kawm 1 | 100% radiography | Tshem tawm sab hauv thiab sab nraud | Siab tshaj |
| Chav kawm 2 | 100% radiography | Tsis tshem tawm | Siab |
| Chav kawm 3 | Tsis xav tau radiographic | Tsis tshem tawm | Txuj |
Chav Kawm 1 tau teev tseg rau cov kev pabcuam tseem ceeb tshaj plaws uas qhov vuam zoo thiab qhov chaw du yog qhov tseem ceeb, thaum Chav Kawm 3 haum rau cov ntawv thov tsawg dua qhov twg hydrostatic lossis tsis yog -kev ntsuas hluav taws xob puas txaus.
Vuam txheej txheem
Tus qauv qhia txog hluav taws xob fusion vuam nrog cov hlau muab tub lim. Cov txheej txheem feem ntau yog cov roj tungsten arc vuam lossis plasma arc vuam rau cov hauv paus hla, tom qab ntawd los ntawm cov roj hlau arc vuam rau muab tub lim. Lub vuam yuav tsum tau ua los ntawm cov txheej txheem tsim nyog, thiab cov yeeb nkab tiav yog cov tshuaj annealed thaum xav tau los ntawm qib.
Qib thiab Daim Ntawv Thov
| Qib | Daim ntawv thov |
|---|---|
| 304, 304L | General corrosive kev pab cuam, khoom noj khoom haus, tshuaj |
| 316, 316L | Kev pabcuam chloride, marine, txheej txheem cov nroj tsuag |
| 304H, 316H, 321H | Siab -kev pab kub txog li 815 degrees C |
| 321, 347 | Cov qhab nia ruaj khov rau qib siab - kev pabcuam kub |
Cov molybdenum-cov kabmob 316 qib muaj kev tiv thaiv zoo tshaj rau pitting thiab crevice corrosion hauv chloride ib puag ncig piv nrog 304.
A358 yeeb nkab muab loj- txoj kab uas hla stainless hlau kav ntawm tus nqi qis dua seamless, nrog rau kev xaiv ntawm tag nrho cov kev ntsuam xyuas hluav taws xob rau kev pabcuam tseem ceeb. Lub phaj-raws li txheej txheem kuj tso cai rau phab ntsa thickness tshaj qhov seamless ntau yam rau tib txoj kab uas hla.
FAQ
Q1. Dab tsi yog qhov txawv ntawm A358 Chav Kawm 1 thiab Chav Kawm 2?
Ob leeg muaj 100 feem pua txoj kev kuaj hluav taws xob, tab sis Chav Kawm 1 tshem tawm cov vuam txuas sab hauv thiab sab nraud, muab qhov zoo dua thiab siab dua - zoo weld profile.
Q2. Cov yeeb nkab A358 puas tuaj yeem siv rau qhov kub thiab txias?
Yog lawm, qib H xws li 304H thiab 316H yog tsim tshwj xeeb rau kev ua haujlwm siab - kub nrog lub zog zoo thiab oxidation tsis kam.
Q3. Puas yog A358 yeeb nkab seamless lossis welded?
A358 npog hluav taws xob-fusion-welded yeeb nkab nkaus xwb. Seamless steel yeeb nkab yog them los ntawm A312, thiab welded yeeb nkab los ntawm A312 lossis A778 nyob ntawm qhov loj thiab qhov yuav tsum tau ua.
Q4. Cov txheej txheem vuam siv dab tsi?
Gas tungsten arc vuam los yog plasma arc vuam rau hauv paus, nrog roj hlau arc vuam rau muab tub lim, tag nrho cov ua nrog muab tub lim hlau.
Q5. Qhov txawv ntawm A358 thiab A312 yog dab tsi?
A312 npog ob qho tib si seamless thiab welded stainless yeeb nkab nyob rau hauv me me, thaum A358 yog sau tshwj xeeb rau loj -diameter hluav taws xob- fusion-welded yeeb nkab los ntawm phaj.
Q6. Qib twg yog qhov zoo tshaj plaws rau chloride ib puag ncig?
316 thiab 316L, nrog 2 mus rau 3 feem pua molybdenum, muab qhov zoo tshaj plaws tiv thaiv pitting thiab crevice corrosion ntawm cov qib A358.
