Isitokwe sepayipi lensimbi ye-alloy engenamthungoI-ASTM A335 P91, ipayipi lensimbi elingenamthungo elisetshenziswa kumashubhu ebhoyila, amashubhu okushintshanisa ukushisa kanye neminye imboni, lingasetshenziswa njengamapayipi ensimbi ama-superheater ashisa kakhulu kanye nama-reheater kuma-boiler angaphansi kwesimo esibucayi kanye nama-supercritical anamazinga okushisa odongeni ≤625°C, kanye nodonga Ama-header ashisa kakhulu kanye namapayipi e-steam anamazinga okushisa ≤600℃ angasetshenziswa futhi njenge-heat exchangers yamandla enuzi kanye namashubhu esithando seyunithi ye-petroleum cracking.
I-ASTM A335 P91 iyinsimbi ye-alloy eshisa kakhulu eyinsimbi ye-chromium-molybdenum ene-alloy ephansi. Isetshenziswa kabanzi emapayipini nasemishinini ngaphansi kwezimo zokushisa okuphezulu kanye nokucindezela okuphezulu, njenge-petrochemical, amandla kagesi, izitshalo zamandla enuzi kanye neminye imikhakha. Izingxenye eziyinhloko zale nto yi-chromium, i-molybdenum, ithusi, i-manganese, i-silicon, i-phosphorus, i-sulfur nezinye izinto. Okuqukethwe kwe-chromium ne-molybdenum kuphakeme kakhulu, okungathuthukisa ukumelana nokushisa okuphezulu kanye nokumelana nokushiswa kwezinto.
Izinto ze-ASTM A335 P91 zinezakhiwo ezinhle kakhulu zemishini futhi zisengagcina amandla nokuqina okuhle ngaphansi kwezimo zokushisa okuphezulu kanye nokucindezela okuphezulu. Izinto ze-ASTM A335 P91 nazo ziyamelana kakhulu ne-oxidation, okungandisa ngempumelelo impilo yesevisi yamapayipi nemishini. Ngaphezu kwalokho, izinto ze-ASTM A335 P91 zisebenza kahle kakhulu ekushiseni, okwenza ukwakhiwa nokugcinwa kube lula.
Ngenxa yokuthi izinto ze-ASTM A335 P91 zinalezi zakhiwo ezinhle kakhulu, zisetshenziswa kabanzi kwezinye izindawo zokushisa okuphezulu kanye nokucindezela okuphezulu. Isibonelo, embonini yamakhemikhali kaphethiloli, amapayipi kanye nemishini eyenziwe nge-ASTM A335 P91 ingamelana nokuguguleka kwamakhemikhali kanye nokugqwala ngaphansi kwamazinga okushisa aphezulu kanye nokucindezela, okuqinisekisa ukusebenza okuphephile kwemishini. Emikhakheni yamandla kagesi kanye nezitshalo zamandla enuzi, amapayipi kanye nemishini eyenziwe nge-ASTM A335 P91 ingamelana nokugqwala kanye nokuguguleka komusi kanye nomhwamuko wamanzi kanye nezinye izinto ezisetshenziswa ngaphansi kwamazinga okushisa aphezulu kanye nokucindezela, okuqinisekisa ukusebenza okuvamile kwemishini.