ʻO Alloy seamless steel pipe he mea hana kiʻekiʻe i hoʻohana nui ʻia i ka ʻoihana a me ke kūkulu ʻana. ʻO kāna hiʻohiʻona nui ka hoʻomaikaʻi ʻana i nā waiwai mechanical, corrosion resistance a me ke kūpaʻa wela kiʻekiʻe o nā paipu kila ma ka hoʻohui ʻana i nā mea hoʻohui like ʻole, e like me ka chromium, molybdenum, nickel, a me nā mea ʻē aʻe.

ASTM A335P moʻo:

P5: P5 kila paipu i loko o 5% chromium a me 0.5% molybdenum, he maikai oxidation kū'ē a me ke kiʻekiʻe wela ikaika, a ua hoʻohana pinepine i kiʻekiʻe wela wela pipelines a me ka petrochemical oihana.
P9: Loaʻa i ka paipu kila P9 ka 9% chromium a me ka 1% molybdenum, ʻoi aku ka kiʻekiʻe o ka pale ʻana i ka oxidation a me ke kūpaʻa corrosion ma mua o P5, a kūpono ia no ke kiʻekiʻe wela a me ke kaiapuni kiʻekiʻe.
P11: Aia ka paipu kila P11 i ka 1.25% chromium a me ka 0.5% molybdenum, he ʻoi aku ka maikaʻi o ka hana, a hoʻohana nui ʻia i nā paila wela a me nā mea hoʻololi wela.
P22: P22 paipu kila i loko o 2.25% chromium a me 1% molybdenum, he kiʻekiʻe kiʻekiʻe kiʻekiʻe wela ikaika a me ka oxidation kū'ē, a ua hoʻohana pinepine 'ia i ke kiʻekiʻe wela a me kiʻekiʻe puʻe paipu i loko o ka mana mea kanu a me ka petrochemical oihana.
P91: P91 paipu kila he chromium kiʻekiʻe a me ke kila molybdenum kiʻekiʻe, i loaʻa 9% chromium a me 1% molybdenum, a loaʻa i ka trace huina o ka vanadium a me ka nitrogen. Loaʻa iā ia ka ikaika wela kiʻekiʻe a me ka ikaika kolo a hoʻohana nui ʻia i nā mea mana supercritical a me ultra-supercritical.
ASTM A213T moʻo:

T11: Aia ka paipu kila T11 i ka 1.25% chromium a me 0.5% molybdenum, e like me P11, a hoʻohana nui ʻia i nā mea hoʻololi wela wela a me nā paila.
T22: Aia ka paipu kila T22 i ka 2.25% chromium a me ka 1% molybdenum, kūpono no ke kiʻekiʻe kiʻekiʻe a me ke kiʻekiʻe puʻuwai, a hoʻohana nui ʻia i nā mea kanu mana a me nā ʻoihana petrochemical.
T91: Ua like ka paipu kila T91 me P91, he 9% chromium a me 1% molybdenum, a he vanadium a me ka nitrogen. Loaʻa iā ia ka ikaika wela kiʻekiʻe a me ke kūpaʻa creep a kūpono i nā mea kanu mana supercritical a ultra-supercritical.
EN 10216-2:
10CrMo9-10: He paipu kila maʻamau ʻEulopa kēia me ka chromium a me ka molybdenum, me ka ikaika kiʻekiʻe kiʻekiʻe a me ke kūpaʻa corrosion, hoʻohana mau ʻia i nā mea kanu mana a me nā ʻoihana petrochemical.
Hoʻomaikaʻi maikaʻi nā paipu kila ʻole Alloy i ka hana piha o nā paipu kila ma o ka hoʻohui ʻana i nā mea hoʻoheheʻe kūikawā i ke kila, a kūpono i nā kūlana hana koʻikoʻi. P series a me T series high chromium and high molybdenum steel pipes, e like me P91 a me T91, e hōʻike ana i ke kuhikuhi o ka hoʻomohala ʻana o nā mea wela kiʻekiʻe a me nā mea kaomi kiʻekiʻe a hoʻohana nui ʻia i nā mea kanu mana supercritical a ultra-supercritical. ʻAʻole hiki ke hōʻoia i ka palekana a me ka paʻa paʻa o ka papahana ke koho ʻana i ka mea hoʻopili pono ʻole ʻia, akā hoʻomaikaʻi nui i ke ola lawelawe a me ka pono o nā mea hana.