1. Yuav tsum tau kho cua sov dab tsi rau ASTM SA192 steel yeeb nkab?
ASTM SA192 mandates tag nrho annealing lossis normalizing thiab tempering los xyuas kom meej ductility thiab toughness. Cov txheej txheem kho cua sov suav nrog:
Annealing: Kub rau 1650-1750℃F (900-955 degree), tuav ntawm qhov kub thiab txias, tom qab ntawd maj mam txias hauv qhov cub.
Normalizing + Tempering: Cua sov rau 1700–1750℃F (925–955 degree), cua- txias, ces tempering ntawm 1100–1300℃F (595–705 degree) los txo cov kev ntxhov siab.
2. ASTM SA192 puas tuaj yeem siv rau hauv ib puag ncig corrosive?
ASTM SA192 yog qib carbon steel nrog txwv kev tiv thaiv corrosion. Nws tsis pom zoo rau qhov chaw muaj corrosive heev (piv txwv li, acidic, saline, lossis tshuaj lom neeg -nplua nuj media). Rau cov kev pab cuam corrosive, alloyed steels (xws li, ASTM A335 P91/P92) los yog corrosion{11}}resistant alloys (CRAs) yuav tsum tau siv. Hauv cov kab mob me me, cov txheej txheem tiv thaiv (xws li galvanization, epoxy) tuaj yeem siv.
3. Qhov txawv ntawm ASTM SA192 thiab ASTM A210 Qib A1 yog dab tsi?
Ob leeg yog seamless boiler raj, tab sis qhov sib txawv tseem ceeb suav nrog:
|
Feature |
ASTM SA 192 UAS |
ASTM A210 Qib A1 |
|
Cov ntsiab lus carbon |
Max 0.28%. |
Max 0.27%. |
|
Tensile zog |
60-80 ksi (414-552 MPa). |
60-85 ksi (414-586 MPa). |
|
Yield zog |
Min 30 ksi (207 MPa). |
Min 30 ksi (207 MPa). |
|
Daim ntawv thov Focus |
High-siab boilers |
Nruab nrab-siab boilers, superheaters, feedwater heaters |
|
Qhov Loj Loj |
OD mus txog 8.625 " |
OD mus txog 12.75 " |
4. Dab tsi tsis yog -kev kuaj kev puas tsuaj (NDT) txoj kev yuav tsum tau rau ASTM SA192?
ASTM SA192 yuav tsum tau kuaj xyuas NDT hauv qab no:
Kev Ntsuas Ultrasonic (UT): Rau kev kuaj xyuas cov teeb meem sab hauv / sab nraud (piv txwv li, cov kab nrib pleb, suav nrog) hauv phab ntsa tuab.
Eddy Current Testing (ECT): Rau kev kuaj pom qhov tsis xws luag (yeem rau qee qhov ntau thiab tsawg).
Kev Ntsuas Hydrostatic: Tag nrho cov raj yuav tsum tau kuaj xyuas hydrostatic siab ntawm 1.5 npaug ntawm qhov siab tshaj plaws kev ua haujlwm siab (MAWP) kom ntseeg tau tias xau nruj.
Kev soj ntsuam pom: Rau qhov zoo ntawm qhov chaw (tsis muaj qhov pits, tawg, lossis oxidation ntau dhau).
5. Qhov siab tshaj plaws ua haujlwm kub rau ASTM SA192 yog dab tsi?
The maximum continuous operating temperature for ASTM SA192 is 900°F (482°C). Beyond this temperature, its mechanical strength (tensile/yield) degrades significantly, and creep deformation may occur. For higher temperature service (e.g., >900℃F), alloy steels nyiam ASTM A335 P22 lossis P91.
