ʻO ke kūlana A335 (ASTM A335/ASME S-A335) he mea kikoʻī honua no nā paipu kila ʻeleʻele ferritic i hoʻohana ʻia i ka wela kiʻekiʻe a me ke kaomi kiʻekiʻe. Hoʻohana nui ʻia ia i ka petrochemical, mana (thermal/nuclear power), boiler a me nā ʻoihana hoʻomaʻemaʻe. ʻO nā paipu kila ma lalo o kēia maʻamau he ikaika kiʻekiʻe kiʻekiʻe ka ikaika, ke kūpaʻa ʻana a me ke kūpaʻa corrosion, a kūpono i nā kūlana hana koʻikoʻi.
Nā mea maʻamau a me ka hoʻohui kemika o ka maʻamau A335
Hoʻokaʻawale ʻia nā mea A335 e nā helu "P", a kūpono nā māka like ʻole no nā mahana like ʻole a me nā wahi corrosive.
| Papa | Nā mea kemika nui | Nā hiʻohiʻona | Pāhana pili |
| A335 P5 | Cr 4-6%, Mo 0.45-0.65% | Kūleʻa i ka sulfur corrosion a me ka kolo ʻana i nā mahana waena | ≤650°C |
| A335 P9 | Cr 8-10%, Mo 0.9-1.1% | Loaʻa iā ia ke kūpaʻa oxidation kiʻekiʻe a me ka ikaika kiʻekiʻe | ≤650°C |
| A335 P11 | Cr 1.0-1.5%, Mo 0.44-0.65% | ʻO ka weldability maikaʻi a me ka ikaika waena | ≤550°C |
| A335 P12 | Cr 0.8-1.25%, Mo 0.44-0.65% | E like me P11, kahi koho waiwai | ≤550°C |
| A335 P22 | Cr 2.0-2.5%, Mo 0.9-1.1% | Anti-hydrogen corrosion, hoʻohana maʻamau ʻia i loko o nā pahu pahu mana | ≤600°C |
| A335 P91 | Cr 8-9.5%, Mo 0.85-1.05% | ʻO ka ikaika kiʻekiʻe loa, makemake ʻia no nā ʻāpana supercritical | ≤650°C |
| A335 P92 | P91 + W | ʻO ke kūpaʻa wela kiʻekiʻe, kūpono no nā ʻāpana ultra-supercritical | ≤700°C |
Nā hiʻohiʻona noiʻi o nā paipu kila A335
1. ʻOihana Petrochemical
A335 P5/P9: nā ʻāpana hoʻoheheʻe catalytic i loko o nā hale hoʻoheheʻe, nā pipeline me ka sulfur kiʻekiʻe.
A335 P11/P12: nā mea hoʻololi wela, nā paipu hoʻoili mahu ma waena o ka wela.
2. ʻOihana mana (mana wela/mana nuklea)
A335 P22: ʻO nā paipu mahu nui a me nā poʻomanaʻo o nā mea kanu wela.
A335 P91/P92: Supercritical/ultra-supercritical units, mana nukili kiʻekiʻe-press pipelines.
3. ʻO nā paila a me nā ipu kaomi
A335 P91: Nā ʻāpana wela kiʻekiʻe o nā boilers kiʻekiʻe o kēia wā.
A335 P92: ʻO nā laina paipu kū i ka wela kiʻekiʻe no nā paila kiʻekiʻe.
Pehea e koho ai i ka mea pono A335? Pono wela:
Pono wela:
≤550°C: P11/P12
≤650°C: P5/P9/P22/P91
≤700°C: P92
Kaiapuni kino:
ʻO ke ʻano o ka sulfur → P5/P9
Kaiapuni kino waihā → P22/P91
Ke kumu kūʻai a me ka ikaika:
Koho waiwai → P11/P12
Nā koi ikaika kiʻekiʻe → P91/P92
Nā kūlana kūlike o ka honua no nā paipu kila A335
| A335 | （EN） | （JIS） |
| P11 | 13CrMo4-5 | STPA23 |
| P22 | 10CrMo9-10 | STPA24 |
| P91 | X10CrMoVNb9-1 | STPA26 |
FAQ
Q1: He aha ka ʻokoʻa ma waena o A335 P91 a me P22?
P91: ʻOi aku ka nui o ka chromium a me ka molybdenum maʻiʻo, ʻoi aku ka ikaika o ke kūpaʻa ʻana, kūpono no nā ʻāpana supercritical.
P22: ʻO ke kumu kūʻai haʻahaʻa, kūpono i nā paila mea kanu mana.
Q2: Pono anei ka paipu kila A335 i ka mālama wela?
Pono ka hoʻomaʻamaʻa maʻamau + tempering, a ʻo P91/P92 pū kekahi e koi i ka mana koʻikoʻi o ka helu hoʻomaha.
P3: Ua ʻoi aku ka maikaʻi o ka A335 P92 ma mua o P91?
He kiʻekiʻe ka pale wela o ka P92 (≤700 ° C) ma muli o ke kū ʻana o tungsten (W), akā ʻoi aku ka kiʻekiʻe o ke kumukūʻai.
ʻO A335 maʻamau alloy seamless steel pipe he mea kī ma lalo o ke kiʻekiʻe wela a me nā kūlana kiʻekiʻe. Kūpono nā mea like ʻole (e like me P5, P9, P11, P22, P91, P92) no nā hiʻohiʻona like ʻole. I ke koho ʻana, pono e noʻonoʻo piha i ka mahana, ka corrosiveness, ka ikaika a me nā kumu kumu kūʻai, a e nānā i nā kūlana like honua (e like me EN, JIS).
Ka manawa hoʻouna: Jun-06-2025
