He rauemi mahi-teitei te paipa maitai tuitui koranu e whakamahia whānuitia ana i roto i ngā ahumahi me ngā hanganga. Ko tōna āhuatanga matua ko te whakapai ake i ngā āhuatanga miihini, te ātete ki te waikura me te ātete ki te pāmahana teitei o ngā paipa maitai mā te tāpiri i ngā momo huānga koranu rerekē, pērā i te chromium, te molybdenum, te nickel, me ētahi atu. Ko ngā mea e whai ake nei ko ētahi o ngā rauemi paipa maitai tuitui koranu e tohuhia ana:

ASTM A335Raupapa P:

P5Kei roto i te paipa maitai P5 te 5% chromium me te 0.5% molybdenum, he pai te ātete ki te waikura me te kaha ki te pāmahana teitei, ā, he maha ngā wā e whakamahia ana i roto i ngā paipa mamaoa pāmahana teitei me te umanga hinu.
P9Kei roto i te paipa maitai P9 te 9% chromium me te 1% molybdenum, ā, he nui ake te ātete ki te waikura me te waikura i te P5, ā, he pai mō ngā taiao pāmahana teitei me te pēhanga teitei.
P11Kei roto i te paipa maitai P11 te 1.25% chromium me te 0.5% molybdenum, ā, he pai ake te mahi whānui, ā, e whakamahia whānuitia ana i roto i ngā kohua pāmahana teitei me ngā whakawhiti wera.
P22Kei roto i te paipa maitai P22 te 2.25% chromium me te 1% molybdenum, he kaha teitei ki te pāmahana teitei me te ātete ki te waikura, ā, he maha ngā wā e whakamahia ana i roto i ngā paipa pāmahana teitei me te pēhanga teitei i roto i ngā tipu hiko me te umanga hinu matū.
P91He paipa maitai P91 he maitai chromium teitei me te molybdenum teitei, kei roto ko te 9% chromium me te 1% molybdenum, ā, he iti noa iho te vanadium me te hauota kei roto. He tino kaha te pāmahana me te kaha ngoki, ā, he whānuitia te whakamahinga i roto i ngā tipu hiko tino kaha me te tino kaha.
ASTM A213Raupapa T:

T11Kei roto i te paipa maitai T11 te 1.25% chromium me te 0.5% molybdenum, he rite ki te P11, ā, e whakamahia ana i roto i ngā whakawhiti wera pāmahana teitei me ngā poiha.
T22Kei roto i te paipa maitai T22 te 2.25% chromium me te 1% molybdenum, he pai mō ngā taiao pāmahana teitei me te pēhanga teitei, ā, he whānuitia te whakamahinga i roto i ngā tipu hiko me ngā ahumahi hinu matū.
T91He rite tonu te paipa maitai T91 ki te P91, kei roto ko te 9% chromium me te 1% molybdenum, ā, kei roto hoki ko te vanadium me te hauota. He tino kaha ki te pāmahana teitei me te ātete ki te ngokingoki, ā, he pai mō ngā tipu hiko tino kaha me te tino kaha.
EN 10216-2:
10CrMo9-10: He paipa maitai koranu paerewa Pākehā tēnei kei roto ko te chromium me te molybdenum, he kaha pāmahana teitei me te ātete ki te waikura, e whakamahia whānuitia ana i roto i ngā tipu hiko me ngā ahumahi hinu matū.
Mā te tāpiri i ngā huānga koranu motuhake ki te koranu, ka tino whakapai ake ngā paipa koranu i te mahi whānui o ngā paipa koranu, ā, he pai hoki mō ngā āhuatanga mahi tino uaua. Ko ngā paipa koranu raupapa P me te raupapa T he koranu teitei me te koranu teitei, pērā i te P91 me te T91, e tohu ana i te ahunga whanaketanga o ngā rauemi pāmahana teitei me te pēhanga teitei o ēnei rā, ā, e whakamahia whānuitia ana i roto i ngā tipu hiko tino kaha me te tino kaha. Mā te whiriwhiri i te rauemi paipa koranu kore-koranu e tika ana, ehara i te mea ka taea anake te whakarite i te haumaru me te mahi pumau o te kaupapa, engari ka tino whakapai ake hoki i te roa o te mahi me te whai huatanga o ngā taputapu.