Muyezo wa A335 (ASTM A335/ASME S-A335) ndi chizindikiritso chapadziko lonse lapansi cha mapaipi achitsulo chopanda msoko cha ferritic alloy omwe amagwiritsidwa ntchito m'malo otentha kwambiri komanso opanikizika kwambiri. Amagwiritsidwa ntchito kwambiri m'mafakitale a petrochemical, magetsi (mphamvu yotentha/nyukiliya), ma boiler ndi mafakitale oyeretsera. Mapaipi achitsulo omwe ali pansi pa muyezo uwu ali ndi mphamvu yabwino kwambiri kutentha kwambiri, kukana kukwawa komanso kukana dzimbiri, ndipo ndi oyenera kugwira ntchito molimbika kwambiri.
Zipangizo zodziwika bwino komanso kapangidwe ka mankhwala a muyezo wa A335
Zipangizo za A335 zimasiyanitsidwa ndi manambala a "P", ndipo magiredi osiyanasiyana ndi oyenera kutentha kosiyanasiyana ndi malo owononga:
| Giredi | Zigawo zazikulu za mankhwala | Makhalidwe | Kutentha komwe kungagwiritsidwe ntchito |
| A335 P5 | Cr 4-6%, Mo 0.45-0.65% | Yosagonjetsedwa ndi dzimbiri la sulfure komanso imakwawa pa kutentha kwapakati | ≤650°C |
| A335 P9 | Cr 8-10%, Mo 0.9-1.1% | Ili ndi kukana kutentha kwambiri kwa okosijeni komanso mphamvu zambiri. | ≤650°C |
| A335 P11 | Cr 1.0-1.5%, Mo 0.44-0.65% | Kutha kupotoka bwino komanso mphamvu yapakati pa kutentha | ≤550°C |
| A335 P12 | Cr 0.8-1.25%, Mo 0.44-0.65% | Mofanana ndi P11, chisankho chotsika mtengo | ≤550°C |
| A335 P22 | Cr 2.0-2.5%, Mo 0.9-1.1% | Kutupa kwa haidrojeni, komwe kumagwiritsidwa ntchito kwambiri mu boilers za siteshoni yamagetsi | ≤600°C |
| A335 P91 | Cr 8-9.5%, Mo 0.85-1.05% | Mphamvu yapamwamba kwambiri, yomwe imakonda kugwiritsidwa ntchito pa mayunitsi ofunikira kwambiri | ≤650°C |
| A335 P92 | P91 + W | Kukana kutentha kwambiri, koyenera mayunitsi ofunikira kwambiri | ≤700°C |
Zochitika zogwiritsira ntchito mapaipi achitsulo a A335
1. Makampani opanga mafuta
A335 P5/P9: mayunitsi odulira zinthu zoyambitsa kusweka m'malo oyeretsera, mapaipi okhala ndi sulfure otentha kwambiri.
A335 P11/P12: zosinthira kutentha, mapaipi otumizira nthunzi kutentha kwapakati.
2. Makampani opanga magetsi (mphamvu yotentha/mphamvu ya nyukiliya)
A335 P22: Mapaipi akuluakulu a nthunzi ndi mitu ya mafakitale achikhalidwe opangira magetsi.
A335 P91/P92: Magawo ofunikira kwambiri/ofunikira kwambiri, mapaipi amphamvu kwambiri a nyukiliya.
3. Maboiler ndi zotengera zopanikizika
A335 P91: Zigawo zotentha kwambiri za ma boiler amakono ogwira ntchito bwino.
A335 P92: Mapaipi osatentha kwambiri a ma boiler okhala ndi zinthu zapamwamba.
Kodi mungasankhe bwanji zinthu zoyenera za A335? Zofunikira pa kutentha:
Zofunikira pa kutentha:
≤550°C: P11/P12
≤650°C: P5/P9/P22/P91
≤700°C: P92
Malo owononga:
Chomera chokhala ndi sulfure → P5/P9
Malo owononga a haidrojeni → P22/P91
Mtengo ndi mphamvu:
Kusankha kotsika mtengo → P11/P12
Zofunikira pa mphamvu zambiri → P91/P92
Miyezo yofanana yapadziko lonse lapansi ya mapaipi achitsulo a A335
| A335 | (EN) | (JIS) |
| P11 | 13CrMo4-5 | STPA23 |
| P22 | 10CrMo9-10 | STPA24 |
| P91 | X10CrMoVNb9-1 | STPA26 |
FAQ
Q1: Kodi pali kusiyana kotani pakati pa A335 P91 ndi P22?
P91: Kuchuluka kwa chromium ndi molybdenum, kukana kwamphamvu kwa kukwawa, koyenera mayunitsi ofunikira kwambiri.
P22: Mtengo wotsika, woyenera ma boiler achikhalidwe amagetsi.
Q2: Kodi chitoliro chachitsulo cha A335 chikufunika kutentha?
Kukonza bwino + kukonza kutentha ndikofunikira, ndipo P91/P92 imafunanso kuwongolera mwamphamvu kuchuluka kwa kuzizira.
Q3: Kodi A335 P92 ndi yabwino kuposa P91?
P92 ili ndi kukana kutentha kwambiri (≤700°C) chifukwa cha kupezeka kwa tungsten (W), koma mtengo wake ndi wokweranso.
Chitoliro chachitsulo chopanda msoko cha A335 ndi chinthu chofunikira kwambiri pa kutentha kwambiri komanso kupanikizika kwambiri. Zipangizo zosiyanasiyana (monga P5, P9, P11, P22, P91, P92) ndizoyenera pazochitika zosiyanasiyana. Posankha, ndikofunikira kuganizira kutentha, kuwononga, mphamvu ndi mtengo wake, ndikugwiritsa ntchito miyezo yofanana yapadziko lonse lapansi (monga EN, JIS).
Nthawi yotumizira: Juni-06-2025
