Izinga le-A335 (I-ASTM A335/ASME S-A335) iyincazelo yamazwe ngamazwe yamapayipi ensimbi angenamthungo ensimbi ye-ferritic alloy asetshenziswa ezindaweni zokushisa okuphezulu kanye nokucindezela okuphezulu. Isetshenziswa kabanzi embonini ye-petrochemical, amandla (amandla okushisa/enuzi), amabhoyila kanye nokuhlanza. Amapayipi ensimbi ngaphansi kwaleli zinga anamandla aphezulu okushisa okuphezulu, ukumelana nokukhukhuleka kanye nokumelana nokugqwala, futhi afaneleka ezimweni zokusebenza ezimbi kakhulu.
Izinto ezivamile kanye nokwakheka kwamakhemikhali kwe-A335 standard
Izinto ze-A335 zihlukaniswa ngezinombolo "P", futhi amamaki ahlukene afanele amazinga okushisa ahlukene kanye nezindawo ezigqwalisayo:
| Ibanga | Izakhi zamakhemikhali eziyinhloko | Izici | Izinga lokushisa elisebenzayo |
| A335 P5 | I-Cr 4-6%, Mo 0.45-0.65% | Imelana nokugqwala kwesulfure futhi iyakhukhuleka emazingeni okushisa aphakathi | ≤650°C |
| I-A335 P9 | I-Cr 8-10%, Mo 0.9-1.1% | Inokumelana nokushiswa kwe-oxidation okushisa okuphezulu kanye namandla aphezulu kakhulu | ≤650°C |
| A335 P11 | I-Cr 1.0-1.5%, Mo 0.44-0.65% | Ukushibilika okuhle kanye namandla okushisa aphakathi | ≤550°C |
| A335 P12 | I-Cr 0.8-1.25%, Mo 0.44-0.65% | Kufana ne-P11, ukukhetha okungabizi kakhulu | ≤550°C |
| A335 P22 | I-Cr 2.0-2.5%, Mo 0.9-1.1% | Ukugqwala okulwa ne-hydrogen, okusetshenziswa kakhulu kuma-boiler esiteshi sikagesi | ≤600°C |
| A335 P91 | I-Cr 8-9.5%, Mo 0.85-1.05% | Amandla aphezulu kakhulu, akhethwa kakhulu kumayunithi abucayi kakhulu | ≤650°C |
| A335 P92 | P91 + W | Ukumelana nokushisa okuphezulu, okufanele amayunithi abaluleke kakhulu | ≤700°C |
Izimo zokusetshenziswa kwamapayipi ensimbi e-A335
1. Imboni ye-Petrochemical
I-A335 P5/P9: amayunithi okuqhekeka kwe-catalytic ezindaweni zokuhluza, amapayipi aqukethe isibabule ashisa kakhulu.
A335 P11/P12: ama-heat exchanger, amapayipi okudlulisa umusi okushisa okuphakathi nendawo.
2. Imboni yamandla (amandla okushisa/amandla enuzi)
A335 P22: Amapayipi amakhulu omusi kanye nezihloko zezitshalo zamandla ezishisayo zendabuko.
A335 P91/P92: Amayunithi abucayi kakhulu/abucayi kakhulu, amapayipi anomfutho ophezulu wamandla enuzi.
3. Amabhoyila nemikhumbi yokucindezela
A335 P91: Izingxenye ezishisa kakhulu zama-boiler anamuhla asebenza kahle kakhulu.
A335 P92: Amapayipi amelana nokushisa okuphezulu kwama-boiler anepharamitha ephezulu.
Ungayikhetha kanjani into efanele ye-A335? Izidingo zokushisa:
Izidingo Zokushisa:
≤550°C: P11/P12
≤650°C: P5/P9/P22/P91
≤700°C: P92
Indawo ebhubhisayo:
I-medium equkethe i-sulfur → P5/P9
Indawo egqwalisayo ye-hydrogen → P22/P91
Izindleko namandla:
Ukukhetha okungabizi kakhulu → P11/P12
Izidingo zamandla aphezulu → P91/P92
Izindinganiso ezilinganayo zomhlaba wonke zamapayipi ensimbi e-A335
| A335 | (EN) | (I-JIS) |
| P11 | 13CrMo4-5 | I-STPA23 |
| P22 | 10CrMo9-10 | I-STPA24 |
| I-P91 | I-X10CrMoVNb9-1 | I-STPA26 |
Imibuzo Evame Ukubuzwa
UMBUZO 1: Uyini umehluko phakathi kwe-A335 P91 ne-P22?
I-P91: Okuqukethwe okuphezulu kwe-chromium ne-molybdenum, ukumelana okunamandla kokukhasa, okulungele amayunithi abucayi kakhulu.
P22: Izindleko eziphansi, ezifanele ama-boiler ezitshalo zamandla zendabuko.
Umbuzo 2: Ingabe ipayipi lensimbi i-A335 lidinga ukwelashwa kokushisa?
Ukwelashwa kokujwayeza + ukulinganisela kuyadingeka, kanti i-P91/P92 idinga nokulawulwa okuqinile kwesilinganiso sokupholisa.
Umbuzo 3: Ingabe i-A335 P92 ingcono kune-P91?
I-P92 inokumelana nokushisa okuphezulu (≤700°C) ngenxa yokuba khona kwe-tungsten (W), kodwa izindleko nazo ziphakeme.
Ipayipi lensimbi elingenamthungo le-A335 elijwayelekile liyinto ebalulekile ngaphansi kwezimo zokushisa okuphezulu kanye nokucindezela okuphezulu. Izinto ezahlukene (njenge-P5, P9, P11, P22, P91, P92) zifaneleka ezimweni ezahlukene. Lapho ukhetha, kubalulekile ukucabangela ngokuphelele izinga lokushisa, ukugqwala, amandla kanye nezici zezindleko, futhi ubheke amazinga alinganayo omhlaba wonke (njenge-EN, JIS).
Isikhathi sokuthunyelwe: Juni-06-2025
