Q: Dab tsi yog daim ntawv thov ntawm ASTM A252 yeeb nkab?
A:ASTM A252 yeeb nkab feem ntau yog siv rausteel yeeb nkab pileshauv kev ua haujlwm tob tob. Nws yog tsav mus rau hauv av los txhawb cov qauv loj xws li cov tsev, txuas hniav, piers, thiab offshore platforms los ntawm kev hloov lawv cov load rau cov av ruaj khov lossis pob zeb txheej-2.
Q: Cov qhab nia tseem ceeb tau teev tseg hauv ASTM A252 yog dab tsi thiab lawv txawv li cas?
A:Tus qauv qhia peb qib raws li qhov tsawg kawg nkaus yield zog:Qib 1 (30,000 psi), Qib 2 (35,000 psi), thiab Qib 3 (45,000 psi). Qhov kev xaiv nyob ntawm qhov yuav tsum tau muaj load-cov kabmob muaj peev xwm thiab kev tsav tsheb ntawm qhov project tshwj xeeb. Cov qib siab dua muaj zog dua.
Q: Dab tsi yog cov txheej txheem tsim khoom rau ASTM A252 yeeb nkab?
A:Cov yeeb nkab tuaj yeem tsim ua ib qhoweldedlos yogseamless. Welded kav yog tsim los ntawm steel phaj los yog ntawv thiab welded raws ib tug longitudinal seam. Cov kav dej seamless yog tsim los ntawm cov khoom siv hlau. Ob hom yuav tsum ua tau raws li cov khoom siv kho tshuab thiab tshuaj lom neeg tib yam.
Q: Dab tsi tseem ceeb ntawm cov khoom siv kho tshuab raug kuaj kom ua raws li?
A:Tus txheej txheem mandates xeem rauyield zog, tensile zog, thiab elongation. Cov kev ntsuam xyuas no paub tseeb tias cov yeeb nkab tuaj yeem tiv taus qhov kev ntxhov siab loj heev uas tau tsav mus rau hauv lub ntiaj teb thiab txhawb nqa cov txheej txheem tsis ua haujlwm.
Q: Cov tshuaj muaj pes tsawg leeg ntawm cov hlau tswj tau li cas?
A:Thaum ASTM A252 tsom rau cov khoom siv kho tshuab, nws hais txog cov qauv steel qib (xws li AISI) rau cov tshuaj muaj pes tsawg leeg. Txwv rau cov ntsiab lus xws licarbon, manganese, phosphorus, thiab sulfurraug tswj xyuas kom ntseeg tau tias weldability, toughness, thiab tag nrho cov qauv kev ncaj ncees.
