1. A671 CA55 Class 62 steel yeeb nkab yog dab tsi?
Nws yog ibhluav taws xob -fusion-welded (EFW) steel yeeb nkabtsim rauqis-kev pabcuam kub, ua raws li cov qauv ASTM A671. Lub "CA55" qhia txog nwscarbon steel khoom qib, thaum "Class 62" qhia txog aYam tsawg kawg nkaus lub zog ntawm 62 ksi (427 MPa).
2. Nws nquag siv qhov twg?
Feem ntau hauvDaim ntawv thov cryogenic(piv txwv li, LNG nroj tsuag, tub yees tshuab) thiabcov hlab ntsha siabqhov twg tsawg-kub toughness yog qhov tseem ceeb. Kuj tseem siv hauvfais fab nroj tsuag thiab pipelines.
3. Nws cov khoom tseem ceeb yog dab tsi?
Khoom siv:Cov pa roj carbon steel nrog tswj chemistry rau qis -kub ductility.
Vuam:EFW txheej txheem ua kom zoo ib yam; post-weld heat treatment (PWHT) tej zaum yuav tsum tau.
Kev ntsuas siab:Tsim nyog rau siab - ib puag ncig siab vim Class 62 lub zog.
4. Nws txawv li cas ntawm lwm cov chav kawm ASTM A671?
Piv rau cov chav kawm qis (piv txwv li, Chav Kawm 42),Chav Kawm 62 muaj zog duatab sis tej zaum yuav xav tau kev ntsuam xyuas nruj dua rau kev ua haujlwm qis - kub. Tsis zoo li A672 (zoo ib yam tab sis rau siab dua), A671 tsom rausub-zero condition.
5. Cov qauv twg tswj hwm nws qhov kev sim thiab kev tsim khoom?
ASTM A671 Cov Lus Qhia:Npog kev tsim khoom thiab kev sim.
Supplementary Standards:ASTM A370 (kev ntsuam xyuas tshuab), ASME BPVC rau kev siv siab.
Tsis yog -Kev kuaj kev puas tsuaj (NDT):Kev kuaj hluav taws xob lossis kuaj ultrasonic yog qhov yuav tsum tau ua kom muaj kev ncaj ncees.
