1. Q: Cov qauv kev lag luam twg tswj xyuas cov kav dej no?
A:Cov kev ntsuam xyuas tseem ceeb ntawm ASTM cov qauv suav nrog hydrostatic lossis tsis yog -kev ntsuas hluav taws xob puas tsuaj rau kev siab ncaj ncees, kev ntsuas tensile rau lub zog, flattening / khoov kuaj rau ductility, thiab rauA106, carbon sib npaug rau kev ntsuas kev ntsuas weldability.
2. Q: Dab tsi yog "Schedule" hauv cov yeeb nkab sizing, thiab nws cuam tshuam li cas rau qib?
A:Teem caij (piv txwv li, Sch 40, Sch 80) txhais cov phab ntsa thickness rau ib tug muab nominal yeeb nkab loj (NPS). Qhov xav tau lub zog rau kev tsim lub siab yuav txiav txim siab lub Sijhawm tsim nyog. Qib siab zog (xws liA106 gr. B) tuaj yeem tso cai rau lub Sijhawm thinner piv rau qib qis zog ntawm tib lub siab.
3. Q: ASTM A53 lossis A106 yeeb nkab puas tuaj yeem siv rau kev pabcuam kub tsawg?
A:Cov qib txheem tsis raug ntsuas rau sub- xoom (cryogenic) kev pabcuam vim tias cov khoom tuaj yeem ua rau tawg. Rau qis kub, specifications nyiamASTM A333 Qib 6(ib cov pa roj carbon monoxide-steel) uas yuav tsum tau ua kom muaj kev cuam tshuam toughness.
4. Q: Dab tsi yog qhov tseem ceeb ntawm "Carbon Equivalent" tus nqi?
A: Carbon Equivalent (CE) combines the effect of carbon and other alloying elements on weldability and hardenability. A high CE (>0,43 uaA106 gr. B, piv txwv li) tej zaum yuav xav tau preheat ua ntej welding los tiv thaiv kom txhob txias tawg nyob rau hauv lub Thaum tshav kub kub -Teb chaws cuam tshuam (HAZ).
5. Q: Dab tsi yog qhov ua tiav ntawm qhov chaw thiab qhov tsis xws luag?
A:Cov qauv tso cai rau me me qhov tsis zoo tab sis tsis lees txais cov seams, laps, lossis slugs uas tshaj qhov tob txwv ntsig txog phab ntsa tuab. Scales los ntawm kub xov yog ib yam. Rau kev ua tiav nruj dua, cov tshuab ntxuav los yog cov khoom tiav tuaj yeem raug teev tseg.
