He paipa maitai koranu kore-tuituiASTM A335 P91, he paipa maitai kore hononga e whakamahia ana i roto i ngā ngongo poiha, ngā ngongo whakawhiti wera me ētahi atu ahumahi, ka taea te whakamahi hei paipa maitai mō ngā whakamahana pāmahana-tiketike me ngā whakamahana anō i roto i ngā poiha iti-arotake me ngā kohua tino-arotake me ngā pāmahana pakitara ≤625°C, tae atu ki ngā pane pakitara pāmahana-tiketike me ngā paipa mamaoa me ngā pāmahana ≤600℃ ka taea hoki te whakamahi hei whakawhiti wera mana karihi me ngā ngongo oumu wae pakaru hinu.
Ko te ASTM A335 P91 he maitai koranu pāmahana-teitei, he maitai chromium-molybdenum koranu-iti. He whānuitia te whakamahinga i roto i ngā paipa me ngā taputapu i raro i ngā taiao pāmahana-teitei me te pēhanga-teitei, pērā i te matū hinu, te hiko, ngā tipu hiko karihi me ētahi atu mara. Ko ngā wāhanga matua o tēnei rauemi ko te chromium, te molybdenum, te parahi, te manganese, te silicon, te phosphorus, te whanariki me ētahi atu huānga. He teitei te ihirangi o te chromium me te molybdenum, ka taea te whakapai ake i te ātete pāmahana-teitei me te ātete waikura o te rauemi.
He tino pai ngā āhuatanga miihini o te rauemi ASTM A335 P91, ā, ka taea tonu te pupuri i te kaha me te pakari i raro i ngā taiao pāmahana teitei me te pēhanga teitei. He tino ātete hoki te rauemi ki te waikura, ka taea ai te whakaroa i te roa o te mahi a ngā paipa me ngā taputapu. Hei tāpiri, he pai hoki te mahi whakarewa o te rauemi, e māmā ai te hanga me te tiaki.
Nā te mea he tino pai ēnei āhuatanga o te rauemi ASTM A335 P91, he whānuitia te whakamahinga i roto i ētahi taiao pāmahana teitei me te pēhanga teitei. Hei tauira, i roto i te umanga hinu matū, ka taea e ngā paipa me ngā taputapu i hangaia ki te ASTM A335 P91 te tu atu i te horo matū me te waikura i raro i ngā pāmahana me ngā pēhanga teitei, kia pai ai te whakahaere haumaru o ngā taputapu. I roto i ngā mara o te hiko me ngā tipu hiko karihi, ka taea e ngā paipa me ngā taputapu i hangaia ki te ASTM A335 P91 te tu atu i te waikura me te horo o te mamaoa me te kohu wai me ētahi atu mea i raro i te pāmahana me te pēhanga teitei, kia pai ai te whakahaere noa o ngā taputapu.