Chitoliro chachitsulo chosapanga dzimbiri chopanda msokoASTM A335 P91, chitoliro chachitsulo chosasunthika chomwe chimagwiritsidwa ntchito m'machubu a boiler, machubu osinthira kutentha ndi mafakitale ena, chingagwiritsidwe ntchito ngati mapaipi achitsulo a ma superheater otentha kwambiri komanso ma reheater obwezeretsanso m'ma boiler osafunikira kwenikweni komanso ofunikira kwambiri okhala ndi kutentha kwa makoma ≤625°C, komanso khoma Ma headers otentha kwambiri ndi mapaipi a nthunzi okhala ndi kutentha ≤600℃ angagwiritsidwenso ntchito ngati machubu osinthira kutentha kwa mphamvu ya nyukiliya ndi machubu a uvuni wa petroleum cracking unit.
ASTM A335 P91 ndi chitsulo chopangidwa ndi aloyi chomwe chimakhala ndi chitsulo chopangidwa ndi chromium-molybdenum chotsika kwambiri. Chimagwiritsidwa ntchito kwambiri m'mapaipi ndi zida zomwe zimakhala ndi kutentha kwambiri komanso kuthamanga kwambiri, monga petrochemical, magetsi, magetsi a nyukiliya ndi zina. Zigawo zazikulu za chinthuchi ndi chromium, molybdenum, mkuwa, manganese, silicon, phosphorous, sulfure ndi zinthu zina. Chromium ndi molybdenum zili ndi zinthu zambiri, zomwe zingathandize kuti zinthuzi zisamatenthe kwambiri komanso kuti zisatenthe kwambiri.
Zipangizo za ASTM A335 P91 zili ndi mphamvu zabwino kwambiri zamakanika ndipo zimatha kukhalabe zolimba komanso zolimba pansi pa kutentha kwambiri komanso malo opanikizika kwambiri. Zipangizozi zimalimbananso ndi okosijeni, zomwe zimatha kukulitsa moyo wa mapaipi ndi zida. Kuphatikiza apo, zidazo zimakhalanso ndi ntchito yabwino yolumikizira, zomwe zimapangitsa kuti zomangamanga ndi kukonza zikhale zosavuta.
Popeza zinthu za ASTM A335 P91 zili ndi makhalidwe abwino kwambiri, zimagwiritsidwa ntchito kwambiri m'malo ena otentha kwambiri komanso opanikizika kwambiri. Mwachitsanzo, m'makampani opanga mafuta, mapaipi ndi zida zopangidwa ndi ASTM A335 P91 zimatha kupirira kukokoloka kwa mankhwala ndi dzimbiri pansi pa kutentha kwakukulu ndi kupsinjika, kuonetsetsa kuti zida zikugwira ntchito bwino. M'magawo amagetsi ndi malo opangira mphamvu za nyukiliya, mapaipi ndi zida zopangidwa ndi ASTM A335 P91 zimatha kupirira kukokoloka kwa nthunzi ndi nthunzi yamadzi ndi zinthu zina zolumikizirana pansi pa kutentha kwakukulu ndi kupsinjika, kuonetsetsa kuti zidazo zikugwira ntchito bwino.