Ngā paipa maitai koranu kore-tuitui i hangaia mai iASTM A335 P11meASTM A335 P22e whakamahia whānuitia ana i roto i ngā ahumahi matū hinu me te whakaputa hiko mō ngā rauemi pāmahana teitei, ātete-pēhanga. Ahakoa he paipa maitai koranu chromium-molybdenum e rua kua tohua i raro i te paerewa ASTM A335, he rerekētanga nui kei roto i ngā āhuatanga mahi me te tono. He mea nui te mārama ki ēnei rerekētanga mō te hoahoa hangarau, te whiriwhiri rauemi, me te whakahaere kounga hoko.

Ko te hanganga matū te mea matua e wehewehe ana i ēnei rauemi e rua. ASTMPaipa A335 P11Ko te hanganga matū he tata ki te 1.00 ki te 1.50 wāhanga chromium me te 0.44 ki te 0.65 wāhanga molybdenum. Ko te ASTM A335 P22, i tetahi atu taha, kei roto i ngā huānga whakarewa teitei ake, me te ihirangi chromium tata ki te 1.90 ki te 2.60 wāhanga me te ihirangi molybdenum mai i te 0.87 ki te 1.13 wāhanga. Ko tēnei rerekētanga hanganga ka arahi tika ki ngā rerekētanga nui o tā rātou mahi pāmahana teitei. Ko te ihirangi chromium me te molybdenum teitei ake o te P22 ka whakarato i te kaha pāmahana teitei, te ātete waikura, me te ātete ngoki.

Ina tae ki te whiriwhiri rauemi mō ngā tono hangarau, he rerekē rawa ngā āhuatanga tono o ēnei rauemi e rua. Ko te P11 e whakamahia ana i roto i ngā taiao pāmahana-waenga me te pēhanga, ā, e kitea whānuitia ana i roto i ngā paipa tukatuka i roto i ngā tipu whakamahine hinu, ngā paipa whakamahana pāmahana-iti i roto i ngā poiha tipu hiko, me ētahi pūnaha whakawhiti wera. Ko tōna pāmahana hoahoa he iti iho i te 550°C. Ko te P22, i tētahi atu ringa, he mea hanga mō ngā taiao pāmahana-tiketike me te pēhanga-tiketike e uaua ake ana, ā, he rauemi pai mō ngā paipa whakamahana-tiketike me te whakamahana-anō i roto i ngā poiha tipu hiko, tae atu ki ngā paipa tauhohenga pāmahana-tiketike me te pēhanga-tiketike i roto i te umanga matū hinu. Ka mau tonu i ngā āhuatanga miihini pai rawa atu me te ātete ki te waikura i ngā pāmahana hoahoa o te 580°C me runga ake.

I te hokonga mai i ēnei rauemi e rua, me aro nui ki ngā rerekētanga o ngā whakaritenga hangarau. Mō te rerekētanga o te matotoru o te pakitara, ka piri ngā mea e rua ki te awhe manawanui kotahi kua tohua e tePaerewa ASTM A335. I te wā e hoko ana, me tono ki ngā kaiwhakarato kia whakarato i ngā pūrongo tirotiro taipitopito hei whakarite kia tutuki te matotoru o te pakitara i ngā whakaritenga paipa pēhanga. Mō te whakahaere hanganga matū, me arotake pūmau e ngā kaimahi hoko ngā tiwhikete rauemi hei whakarite kia tutuki ngā whakaritenga paerewa o ngā ihirangi o ngā huānga whakarewa matua pērā i te chromium me te molybdenum. He mea nui kia mōhiotia, ko te whakaritenga ihirangi molybdenum mō te P22 he nui ake i tērā mō te P11, he mea nui hei whakarite i te mahi pāmahana teitei. Hei tāpiri, i te wā e hoko ana, me whiriwhiri te maimoatanga wera tika i runga i te taiao tono. Ko te whakataurite me te whakamahana te whiringa pai rawa atu hei whakarite i te mahi rauemi.

Ahakoa nō te whānau rino koranu chromium-molybdenum te ASTM A335 P11 me te P22, he pai ake te mahi pāmahana teitei a te P22 nā te nui ake o te koranu, ā, he nui ake te utu hoko. Me whai whakaaro whānui ki ngā āhuatanga pēnei i te pāmahana whakahaere, ngā tawhā pēhanga, ngā āhuatanga pāpāho, me te tahua utu i te wā hoahoa hangarau me te whiriwhiri rauemi. I te wā o te tukanga hoko, me tino whakahaere ngā paearu kounga matua pēnei i te hanganga matū, ngā āhuatanga miihini, me ngā manawanui ā-ahu kia tino tutuki ai ngā whakaritenga hoahoa me ngā paerewa haumaru o te rauemi. He mea nui te whiriwhiri rauemi tika me te whakahaere kounga hoko tino tika hei whakarite i te mahi haumaru mō te wā roa o ngā pūnaha paipa pāmahana teitei.