1. Q: Rau ASTM A53 Qib B ERW yeeb nkab, qhov siab tshaj plaws carbon equivalent (CE) yog dab tsi los xyuas kom meej weldability zoo, thiab nws yog xam li cas?
A:Rau qhov zoo weldability ntawm ASTM A53 Gr. B, CE feem ntau txwv rau 0.50% siab tshaj plaws. Cov mis mos yog: CE=C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. Qhov tseeb CE nyob ntawm cov chaw tsim khoom siv hluav taws xob tsom xam.
2. Q: Dab tsi yog qhov sib txawv tseem ceeb hauv kev kho cua sov ntawm ASTM A53 Qib F (raws li -welded) thiab ASTM A53 Qib E (lub qhov cub normalized)?
A:ASTM A53 Qib F cov kav dej yog siv nyob rau hauv raws li -welded mob uas tsis muaj kev kho cua sov tom qab ntawm vuam seam. Qib E cov kav dej yuav tsum tau welded seam cheeb tsam tom qab ntawd normalized (rhuab mus rau saum toj 1650℃F thiab huab cua-cooled) los kho cov qauv nplej thiab txhim kho txhua yam khoom.
3. Q: Tus qauv twg suav nrog siab - zaus induction welded (HFIW) kab yeeb nkab, thiab npe rau qib sib xws nrog lub zog muaj zog ntawm 52 ksi.
A:API 5L npog HFIW kab yeeb nkab. Ib qib uas yogAPI 5L PSL2 X52M, qhov "M" txhais tau tias nws yog tsim los ntawm cov txheej txheem HFIW.
4. Q: Dab tsi yog qhov kev sib tw vuam thawj zaug thaum koom nrog ASTM A106 Qib B seamless yeeb nkab rau ASTM A53 Qib B ERW yeeb nkab, thiab nws txo qis li cas?
A:Qhov kev sib tw yog qhov tsis sib xws hauv cov tshuaj muaj pes tsawg leeg (thiab yog li weldability / hardenability) thiab muaj peev xwm hloov pauv hauv zos hauv ERW seam cheeb tsam. Kev txo qis suav nrog kev siv cov txheej txheem qis dua - hydrogen vuam txheej txheem, kev sib koom ua ke kom tsim nyog kom muaj kev nkag mus rau tag nrho, thiab tswj cov cua sov kom tsis txhob muaj qhov hnyav dhau ntawm HAZ.
5. Q: Rau ASTM A587-96 (2021) (Electric-Resistance-Welded Low-Carbon Steel Pipe), Dab tsi yog nws cov ntawv thov thiab cov yam ntxwv tseem ceeb?
A:Nws thawj daim ntawv thov yog rau cov txheej txheem kev lag luamkub exchangers. Nws cov yam ntxwv tseem ceeb yog cov ntsiab lus tsis tshua muaj carbon tsawg (feem ntau tsawg dua lossis sib npaug li 0.06%), uas muab cov tshuaj tiv thaiv zoo tshaj rau chloride-induced stress corrosion cracking.
