## 1. ASTM A672 yog dab tsi?
** ASTM A672 ** yog tus qauv specification rau **hluav taws xob- fusion-welded steel yeeb nkab ** npaj rau ** siab- kev pabcuam siab ntawm qhov nruab nrab kub **. Cov kav dej no yog tsim los ntawm lub siab lub nkoj zoo steel daim hlau nrog muab cov hlau ntxiv thaum lub sij hawm vuam txheej txheem.
Cov yam ntxwv tseem ceeb ntawm ASTM A672 cov kav dej muaj xws li:
- Lawv feem ntau npog cov kav dej uas muaj qhov ntev ntawm ** 16 ntiv tes (405 mm) lossis loj dua ** thiab phab ntsa tuab ** txog li 3 ntiv tes (75 hli) **.
- Ntau yam khoom siv qib thiab cov chav kawm muaj, nrog rau "qib" qhia txog hom steel phaj siv thiab "chav kawm" qhia txog hom kev kho cua sov uas tau ua thaum tsim khoom, seb lub vuam puas tau tawg, thiab yog tias cov yeeb nkab tau raug kuaj xyuas.
- Cov kev kho cua sov muaj xws li kev ntxhov siab, txo qhov siab, thiab normalization, nyob ntawm seb cov chav kawm tshwj xeeb.
## 2. Qhov txawv ntawm A106 thiab A672
Qhov sib txawv tseem ceeb ntawm ** ASTM A106 ** thiab ** ASTM A672 ** nyob hauv lawv cov txheej txheem tsim khoom ** thiab ua rau ** hom khoom **:
- ** ASTM A106 ** npog ** seamless carbon steel yeeb nkab ** siv rau siab - qhov kub thiab txias. Nws feem ntau yog siv los thauj cov kua dej xws li dej, roj, thiab roj hauv siab - kub, siab - lub tshuab siab.
- ** ASTM A672 ** npog ** hluav taws xob- fusion-welded steel yeeb nkab ** ua los ntawm cov hlau phaj rau siab - kev pabcuam siab ntawm qhov nruab nrab kub.
Txawm hais tias ob qho tib si tuaj yeem siv rau siab - kev pabcuam siab, lawv sib txawv hauv cov txheej txheem tsim khoom (seamless vs. welded), qhov ntau thiab tsawg, thiab cov ntawv thov kub tshwj xeeb.
## 3. Qhov txawv ntawm ASTM A671 thiab ASTM A672
Raws li cov txiaj ntsig tshawb fawb, cov ntaub ntawv tshwj xeeb piv rau ASTM A671 thiab ASTM A672 tsis muaj. Rau cov ntaub ntawv raug thiab cov ncauj lus kom ntxaws txog seb cov qauv no txawv li cas, kuv pom zoo kom sab laj cov qauv ASTM ncaj qha lossis cov peev txheej tshwj xeeb engineering.
## 4. Puas yog ASTM A312 Seamless lossis Welded?
** ASTM A312 ** npog ** ob leeg seamless thiab welded ** austenitic stainless hlau kav.
Cov qauv specification no suav nrog:
- ** Seamless kav **
- ** Ncaj- seam welded kav **
- **Cov kav dej txias ua haujlwm hnyav heev**
Cov kav dej no yog tsim los rau siab -kub thiab siv cov kev pabcuam corrosive.
## 4. Qhov txawv ntawm ASTM A312 thiab 316
Nws yog ib qho tseem ceeb kom nkag siab tias ** ASTM A312 ** thiab ** 316 ** sawv cev rau ntau hom kev qhia tshwj xeeb:
- ** ASTM A312** yog ** cov qauv khoom ** uas qhia meej txog qhov yuav tsum tau muaj rau cov kav dej austenitic stainless hlau, suav nrog qhov ntev, cov khoom siv kho tshuab, kev sim, thiab kev tsim khoom.
- **316** (xws li TP316 thiab TP316L) yog ** qib khoom** nyob rau hauv tus qauv ASTM A312. Nws hais txog ib qho tshwj xeeb stainless hlau muaj pes tsawg leeg nrog tshwj xeeb corrosion kuj zog.
Hauv kev xyaum, koj feem ntau yuav ntsib "ASTM A312 TP316" lossis "ASTM A312 TP316L," uas txhais tau tias cov kav hlau tsis muaj steel tsim raws li A312 tus qauv siv 316 lossis 316L cov khoom siv qib.
