Q1: Dab tsi yog qhov sib npaug Suav tsim rau Asmeskas tus qauv yeeb nkab qib ASTM A333 Qib 1 (tsawg carbon steel rau qis temp)?
A1:ASTM A333 Qib 1 (qhov cuam tshuam kuaj ntawm -45 degree) tsawg dua li Qib 6. Suav sib npaug yogGB/T 18984 Qib 10MnDG. Thaum Qib 6 sib npaug rau 16MnDG, Qib 1 (qis zog, siab dua ductility) yuav tsum muaj cov pa roj carbon tsawg dua thiab manganese cov ntsiab lus . 10MnDG muab cov qis tensile zog pem teb (330 MPa) thiab zoo dua ductility yuav tsum tau kom phim A333 Qib 1 specifications rau structural low{{8}-8.
Q2: Thaum sib piv cov American siab - lub zog structural yeeb nkab txheem ASTM A618 Qib Ib, uas Suav huab cua - resistant steel qib yog functionally sib npaug?
A2:ASTM A618 yog kub- tsim welded thiab seamless structural yeeb nkab txheem rau siab - zog, qis- alloy (HSLA) daim ntawv thov yuav tsum tau atmospheric corrosion kuj. Suav sib npaug yogGB/T 4171 Qib Q295NH(los yog Q345NH). A618 Qib Ib xav tau lub zog tawm ntawm 345 MPa thiab muaj tooj liab (0.20% min), Chromium, thiab Nickel rau corrosion kuj. Q345NH muab tib lub zog tawm los thiab tshuaj lom neeg index (I) rau huab cua tsis kam, ua rau nws ncaj qha sib npaug rau tus choj lossis lub tsev cov tswv cuab raug rau cov ntsiab lus -5.
Q3: Rau precision hydraulic thooj voos kheej kheej, Teb Chaws Asmeskas feem ntau siv ASTM A519 (seamless carbon thiab alloy steel mechanical tubing). Qhov no txhais li cas rau Suav cov qauv?
A3:ASTM A519 nruj me ntsis rau kev siv tshuab (tsis yog siab). Suav sib npaug yogGB/T 8162(Seamless Steel Tubes rau Cov Hom Phiaj). Tshwj xeeb, ASTM A519 Qib 1020 (carbon 0.18-0.23%) sib raug rauGB/T 8162 Qib 20#. Txawm li cas los xij, A519 tso cai rau kev ua kom zoo dua qub (feem ntau yog kos txias) thiab qhov tshwj xeeb nto tiav rau hydraulic honing. Yog li ntawd, thaum lub chemistry sib tw 20#, Suav chaw tsim tshuaj paus yuav tsum siv txias - kos GB / T 8162 nrog precision kam rau ua (h8, h9) kom sib npaug A519 -2-8.
Q4: Yuav ua li cas American tus qauv rau hluav taws tua yeeb nkab, ASTM A135 Qib A, txawv ntawm nws Suav sib npaug GB / T 3091 Q215?
A4:ASTM A135 Qib A muaj lub zog qis dua (48,000 psi tensile / 30,000 psi yield) dua qib B. Qhov sib npaug SuavGB/T 3091 Q215(Yield 215 MPa / 31,000 psi) yog ze rau - qhov sib tw tiag tiag. Q215 tsis tshua muaj nyob rau hauv ntau qhov ntau, vim tias feem ntau cov chaw tsim khoom tsim Q235B los ntawm lub neej ntawd. Thaum Q235B tuaj yeem hloov pauv rau A135 Qib A, Q215 yog cov tshuaj nruj nruj thiab cov neeg kho tshuab ntxaib, muab cov pa roj carbon tsawg (0.09-0.15%) kom yooj yim vuam hauv cov kav dej nyias nyias lossis cov kab hluav taws xob tiv thaiv -1-7.
Q5: Nyob rau hauv cov ntsiab lus ntawm tus qauv yeeb nkab threads thiab NPT (National Yeeb Nkab Taper), yog tias koj muaj ib tug American standard yeeb nkab, puas Suav tus qauv yeeb nkab haum cov threading?
A5:Qhov no yog tus qauv geometric, tsis yog qib khoom siv. Asmeskas cov qauv sivNPT(National Pipe Taper) los yog BSPT. Suav tus qauv kav (GB / T 3091, GB / T 8163) feem ntau siv cov metric system rau qhov ntev (DN) tab sisBSPT(British Standard Pipe Taper) los yog metric parallel threads. Thaum cov khoom siv qib (piv txwv li, 20 # vs A106-B) sib npaug, cov xov feem ntau yogtsis yogncaj qha interchangeable tshwj tsis yog tias tau teev tseg. NPT muaj 60℃xov kaum, thaum BSPT muaj 55℃kaum. Koj tsis tuaj yeem ntsia hlau rau Suav tus qauv galvanized yeeb nkab (BSPT) rau hauv American standard valve (NPT) yam tsis muaj qhov sib npaug, tsis hais qib sib npaug -7.
