1. ASTM A671 CH115 Chav Kawm 62 yog dab tsi?
A:Nws yog ibsiab -kev ua tau zoo hluav taws xob- fusion-welded (EFW) carbon steel yeeb nkabtsim rautsis tshua muaj - kub thiab siab - kev pabcuam siab.
TSI 115: Qhia txog cov tshuaj lom neeg muaj pes tsawg leeg (cov ntsiab lus carbon / manganese ntau dua li cov qib txheem).
Chav Kawm 62: QhiaYam tsawg kawg nkaus lub zog ntawm 62 ksi (427 MPa)nrog yuav tsum taunormalizing lossis quenching / tempering kho cua sov.
2. Cov ntawv thov tseem ceeb?
A:Kev siv tseem ceeb hauv ib puag ncig hnyav:
Cryogenic zog systems(LNG terminals, -196℃kua nitrogen kab)
High -siab hydrocarbon pipelines(Arctic roj / roj kis tau tus mob)
Fais fab nroj tsuag tseem ceeb piping(superheated chav kab saum toj 538 degree)
3. Cov ntaub ntawv tseem ceeb?
A:Cov kev cai nruj heev muaj xws li:
Chemistry:C Tsawg dua lossis sib npaug rau 0.30%, Mn Tsawg dua lossis sib npaug rau 1.65%, S / P Tsawg dua lossis sib npaug rau 0.025% nrog micro- cov khoom sib xyaw
Mechanical:Yield Ntau dua lossis sib npaug ntawm 62 ksi, Tensile 85-110 ksi;-60℃F (-51 degree) Charpy impact tested
Kev Tswj Xyuas Zoo:100% radiography + kuaj ultrasonic (UT) rau weld kev ncaj ncees
4. Chav Kawm 62 piv rau Chav Kawm 61 li cas?
A:Kev hloov kho tseem ceeb:
1 ksi siab dua yield zog(62 vs 61 ksi) kom muaj peev xwm nce siab
Cov kev xav tau ntawm pob txha toughnessrau kev tiv thaiv brittle puas
Txhim kho cov txheej txheem kho cua sov(feem ntau quench & tempered vs normalized)
5. Ua raws li & Daim ntawv pov thawj?
A:Tswj los ntawm:
ASTM A671 / A671M / ASTM A671 / ASTM A671 / ASTM A671 / ASTM A671 / ASTM A671 / ASTM A671 / ASTM A671 / ASTM A671 / A671M / ASTM A671 / ASTM A671 / ASTM A671 / ASTM A671 / A671M / ASTM A671 / A671M / ASTM A671 / ASTM A671 / ASTM A671 / ASTM A671 / A671M / ASTM A671 / ASTM A671 / A671M / ASTM A671 / ASTM A671 / ASTM A671 / A671M / ASTM A671) thiab ASTM A671 / A671M(EFW yeeb nkab txheem)
ASME B31.3(Process Piping Code)
Ntxiv:NACE MR0175 rau qaub kev pab cuam compatibility
