**1. Qhov txawv ntawm Qib A thiab B kav dej yog dab tsi?**
Thawj qhov sib txawv ntawm Qib A thiab Qib B cov kav dej, feem ntau xa mus rau ASTM A53 lossis ASTM A106 cov qauv, yog lawv lub zog txhua yam.
* ** Qib A yeeb nkab ** muaj qhov tsawg kawg nkaus tensile lub zog thiab lub zog tawm los piv rau Qib B. Piv txwv li, hauv ASTM A53, Qib A muaj qhov tsawg kawg nkaus yield zog ntawm 30,000 psi, thaum Qib B muaj qhov tsawg kawg nkaus yield zog ntawm 35,000 psi.
* ** Qib B yeeb nkab ** muaj zog thiab ruaj khov dua qib A. Vim tias nws lub zog siab dua, Qib B yog qib feem ntau siv rau kev siv cov qauv thiab kev siv siab. Qib A yog siv rau qhov qis dua thiab tsis yog- daim ntawv thov tseem ceeb.
**2. Dab tsi yog qhov txawv ntawm Qib A thiab Qib B steel?
Qhov sib txawv ntawm Qib A thiab Qib B steel, feem ntau xa mus rau ASTM A36 lossis ASTM A572, nyob hauv lawv lub zog thiab tshuaj lom neeg muaj pes tsawg leeg.
* ** Qib A Steel (piv txwv li, ASTM A36): ** Qhov no yog cov pa roj carbon tsawg uas paub txog nws qhov zoo tshaj plaws weldability thiab formability. Nws lub zog qis dua Qib B, tab sis nws yog ntau yam thiab siv dav dav dav - lub hom phiaj steel qauv.
* ** Qib B Steel (piv txwv li, ASTM A572):** Qhov no yog siab -lub zog, qis- alloy (HSLA) steel. Nws ua tiav nws cov txiaj ntsig siab dua thiab lub zog tensile los ntawm kev sib ntxiv ntawm me me ntawm alloying ntsiab xws li vanadium. Nws yog siv qhov twg muaj zog dua - rau - qhov hnyav piv yuav tsum tau.
** 3. Dab tsi yog qhov txawv ntawm Class A thiab Class B dub yeeb nkab?**
Kev faib tawm ntawm Class A thiab Class B rau cov yeeb nkab dub yog hais txog cov qauv tsim thiab txheej txheej sib txawv, tsis yog qib khoom siv.
* **Class A Dub Pipe:** Qhov kev faib tawm no feem ntau yog hais txog cov kav dej uas muaj galvanized ntawm ob sab hauv thiab sab nrauv. Lub "dub" hauv lub npe tuaj yeem ua rau tsis meej pem, tab sis nws feem ntau qhia txog lub hauv paus yeeb nkab ua ntej galvanizing. Class A feem ntau txhais tau tias hnyav dua, tiv thaiv zinc txheej ntau dua.
* **Class B Dub Pipe:** Qhov kev faib tawm no feem ntau yog hais txog cov kav dej uas muaj galvanized rau sab nrauv sab nrauv nkaus xwb. Cov txheej txheej yuav sib zog dua li ntawm Chav Kawm A. Nws yog feem ntau siv rau laj kab, tes tuav, thiab lwm yam kev siv sab nraum zoov uas muaj kev cuam tshuam sab hauv tsis yog qhov tseem ceeb.
** 4. Qib Q195 sib npaug li cas?**
Suav tus qauv qib Q195 feem ntau suav hais tias yog qhov sib npaug rau ASTM A36 steel nyob rau hauv cov nqe lus ntawm nws cov khoom siv kho tshuab thiab daim ntawv thov ua me me, qis - carbon steel. Txawm li cas los xij, nws tseem ceeb heev uas yuav tsum nco ntsoov tias cov tshuaj muaj pes tsawg leeg tsis zoo ib yam. Q195 kuj tseem tuaj yeem muab piv rau cov qib xws li S195, S235, thiab S275 hauv cov qauv thoob ntiaj teb sib txawv, tab sis A36 yog qhov kev ua haujlwm zoo tshaj plaws rau kev siv dav dav - lub hom phiaj siv.
**5. Cov khoom siv Q195 yog dab tsi?**
Khoom siv Q195 yog tus qauv Suav (GB / T 700) carbon structural steel. Lub "Q" sawv cev rau Yield Strength (*Qu* fu dian hauv Suav), thiab "195" qhia nws qhov tsawg kawg nkaus yield zog ntawm 195 MPa. Nws yog cov hlau me me nrog zoo ductility, weldability, thiab formability. Vim nws tsis tshua muaj zog thiab tus nqi, Q195 feem ntau yog siv rau kev tsim cov nplooj ntawv, cov xov hlau, cov ntsia hlau, cov kav dej, thiab lwm yam khoom uas tsis tas yuav muaj lub zog siab.
