ASTM A106 Gr.BChitoliro chachitsulo chosasunthika ndi chitoliro chosasunthika chachitsulo cha kaboni chotentha kwambiri mu American Society for Testing and Materials standard, chomwe nthawi zambiri chimagwiritsidwa ntchito ponyamula madzi pansi pa kutentha kwambiri komanso malo opanikizika kwambiri. Zipangizo zofanana ku China makamaka zimatanthauza muyezo wadziko lonse wa ku China (GB) ndi miyezo yamakampani, ndipo ziyenera kufananizidwa kuchokera m'malingaliro atatu: kapangidwe ka mankhwala, mawonekedwe a makina, ndi zochitika zogwiritsidwa ntchito.

Kawirikawiri pali njira ziwiri zoyerekeza zinthu zapakhomo:

Zipangizo zoyamba zofanana: chitsulo 20 (GB/T 8163)
Chitsulo cha 20 ndi chitsulo chokhazikika cha kaboni, chomwe ndi chinthu chofala mu muyezo wa GB/T8163 ndipo chimayenera kunyamulidwa ndi madzi ambiri. Kuyerekeza kapangidwe ka mankhwala: ASTM A106 Gr.B ili ndi kuchuluka kwa kaboni (C) kwa 0.17-0.24%, ndi manganese (Mn) ya 0.29-1.06%; Chitsulo cha 20 chili ndi kuchuluka kwa kaboni kwa 0.17-0.24%, ndi kuchuluka kwa manganese kwa 0.35-0.65%. Kuchuluka kwa kaboni mwa awiriwa kuli pafupi, koma kuchuluka kwa manganese kwa ASTM.A106 Gr.Bili ndi malire apamwamba kwambiri komanso kutentha kwabwino kwambiri.
Kuyerekeza kwa makhalidwe a makina: ASTM A106 Gr.B ili ndi mphamvu yokoka ya >415MPa ndi mphamvu yokoka ya >240MPa; chitsulo 20 chili ndi mphamvu yokoka ya >410MPa ndi mphamvu yokoka ya >245MPa. Deta ndi yofanana koma kutentha komwe kumagwiritsidwa ntchito ndi kosiyana.
Zoletsa kugwiritsa ntchito: Chitsulo 20 ndi choyenera kugwiritsidwa ntchito ndi kutentha kwa kapangidwe kochepera 350℃ komanso kupanikizika kochepa. Ngati chigwiritsidwa ntchito pa kutentha kwakukulu ndi kupanikizika kwakukulu (monga mapaipi a boiler), chipangizo chapamwamba chiyenera kusankhidwa.
Zinthu zina zofanana: 20G (GB 5310)
20G ndi chitoliro chachitsulo chopanda msoko cha ma boiler okhala ndi mphamvu yothamanga kwambiri, chomwe chili mu muyezo wa GB 5310 ndipo chimagwiritsidwa ntchito pamakina a nthunzi otentha kwambiri komanso othamanga kwambiri.
Kuyerekeza kapangidwe ka mankhwala:20GIli ndi mpweya wokwanira wa 0.17-0.24%, manganese wokwanira wa 0.35-0.65%, komanso kuwongolera kwambiri kuchuluka kwa phosphorous ndi sulfure, zomwe zimagwirizana kwambiri ndi zizindikiro za ASTMA106 Gr.B.
Kuyerekeza kwa makhalidwe a makina: Mphamvu ya 20G yogwira ntchito ndi ≥410MPa, ndipo mphamvu yake yogwira ntchito ndi >245MPa, zomwe zili pafupifupi zofanana ndi ASTM A106 Gr.B, ndipo kutentha kovomerezeka kogwira ntchito ndi mpaka 450℃.
Zochitika Zogwiritsira Ntchito: 20G imagwiritsidwa ntchito kwambiri m'mapaipi a boiler a zomera zamagetsi ndi zida zamagetsi zamagetsi, ndipo imatha kusintha ASTM A106 Gr.B pamikhalidwe yofanana yogwirira ntchito.
Malangizo Othandizira Kusintha 1. Kusiyana kwa muyezo: ASTM A106 Gr.B imafuna mayeso opingasa komanso mayeso otsetsereka, pomwe GB/T 8163 imangofunika mayeso otambalala. Mukasintha, ndikofunikira kutsimikizira ngati zinthu zoyeserera zikukwaniritsa zofunikira.
2. Zofunikira pa chithandizo cha kutentha: ASTM A106 Gr.B nthawi zambiri imaperekedwa mu mkhalidwe wotentha, 20G imafuna chithandizo chokhazikika, ndipo njirayo iyenera kusinthidwa ngati yasinthidwa.
3. Zofunikira pa satifiketi: Ngati polojekiti yotumiza kunja ikufotokoza zinthu zomwe zili mu muyezo wa ku America, ndikofunikira kutsimikizira ndi kasitomala ngati muyezo wolowa m'malo mwa muyezo wadziko lonse wavomerezedwa. Mapulojekiti ena angafunike kuwunika kwina kwa chipani chachitatu.
Nkhani yogwiritsira ntchito moyenera
Kampani ina ya petrochemical inagula mapaipi a ASTM A106 Gr.B kuti anyamule mafuta otentha kwambiri. Chifukwa cha nthawi yayitali yotumizira, idasintha n’kuyamba kugwiritsa ntchito zinthu za 20G. Pambuyo poyesa kwa anthu ena, kulimba kwa mphamvu (-20℃ KV2234J) ndi mphamvu yotentha kwambiri (mphamvu yotulutsa>180MPa pa 450℃) ya 20G zinakwaniritsa zofunikira pa kapangidwe kake, ndipo ntchitoyi inavomerezedwa.
Chidule
ASTM A106 Gr.B ikhoza kufanana ndi zitsulo 20 (mikhalidwe yonse yogwirira ntchito) kapena 20G (mikhalidwe yogwirira ntchito yotenthetsera kwambiri komanso yopanikizika kwambiri) ku China. Mukasintha, ndikofunikira kuphatikiza miyezo yeniyeni ya kutentha, kupanikizika ndi mayeso. Ndikofunikira kupereka patsogolo zinthu za 20G, zomwe kapangidwe kake ka mankhwala ndi magwiridwe antchito ake zili pafupi ndi zofunikira za US ndipo zimakhala ndi mitundu yosiyanasiyana ya ntchito.