Amashubhu ensimbi angenamthungo e-Chromium molybdenum (Cr Mo) esevisi yebhoyila ayizinto eziyinhloko ezisetshenziswa kuma-boyila asetshenziswayo, kuma-boyila ezimboni, kanye nasezithandweni ze-petrochemical ngaphansi kokushisa okuphezulu kanye nokucindezela okuphezulu. Angahlukaniswa ngokwezilinganiso zobuchwepheshe ezilandelayo.

1. Ukuhlukaniswa Ngebanga Lensimbi noma Uhlobo (Ukuhlukaniswa Okuyinhloko)

Izinga le-Cr Mo tube elingenamthungo linquma ngqo izinga lokushisa kanye nengcindezi yalo efanele. Izinga elivamile kanye nezindinganiso ezihambisanayo zibhalwe ngezansi.

Ibanga Lensimbi noma Uhlobo
Okujwayelekile
Okuqukethwe kwe-Cr (iphesenti)
Okuqukethwe kwe-Mo (iphesenti)
Izinga lokushisa lensimbi elisebenzayo (izinga le-Celsius)
Isicelo esijwayelekile

15CrMoG
I-GB/T 5310
0.80 kuya ku-1.10
0.25 kuya ku-0.35
kufika ku-550
i-superheater, i-reheater, i-header

12Cr1MoVG
I-GB/T 5310
0.90 kuya ku-1.20
0.25 kuya ku-0.35
kufika ku-580
i-superheater yokushisa okuphezulu, i-reheater yokushisa okuphezulu

12Cr2MoG
I-GB/T 5310
2.00 kuya ku-2.50
0.90 kuya ku-1.10
kufika ku-600
izingxenye zokushisa okuphezulu zebhoyila ezingabalulekile noma ezibaluleke kakhulu

T11 / P11
I-ASTM A213 /A335
1.00 kuya ku-1.50
0.44 kuya ku-0.65
kufika ku-540
amashubhu okushisa ebusweni bebhoyila (T11), izihloko kanye namapayipi (P11)

T22 / P22
I-ASTM A213 / A335
2.00 kuya ku-2.50
0.87 kuya ku-1.13
kufika ku-580
i-superheater yokushisa okuphezulu, i-reheater yokushisa okuphezulu

I-T91 / I-P91
I-ASTM A213 / A335
8.00 kuya ku-9.50
0.85 kuya ku-1.05
kufika ku-650
indawo yokushisa ephezulu kakhulu yebhoyila ebaluleke kakhulu

I-T92 / I-P92
I-ASTM A213 / A335
8.50 kuya ku-9.50
0.30 kuya ku-0.60
kufika ku-650
izingxenye ezidinga amandla aphezulu kakhulu okuhamba

Qaphela: Ku-GB/T 5310, isijobelelo u-G simele ithubhu lebhoyila elinomfutho ophezulu. Ezindinganisweni zaseMelika, uchungechunge lwe-T (iThubhu) lusetshenziselwa amashubhu okushisa aphezulu anobubanzi obuncane, kuyilapho uchungechunge lwe-P (iThubhu) lusetshenziselwa ama-header amakhulu anobubanzi kanye namapayipi.

2. Ukuhlukaniswa Ngokwesikhundla Sengxenye Yebhoyila

Isikhundla sengxenye
Amamaki ajwayelekile
Izinga lokushisa elijwayelekile lensimbi (degree Celsius)
Izidingo ezibalulekile

Ipayipi lodonga lamanzi
15CrMoG, 20G
400 kuya ku-500
ukumelana ne-oxidation, amandla anele okuhamba

Ishubhu le-Superheater
12Cr1MoVG, T91, T92
550 kuya ku-650
amandla amahle kakhulu okuhamba ngokushisa okuphezulu kanye nokumelana nokushiswa komusi

Ishubhu yokuvuselela
12Cr1MoVG, T91
550 kuya ku-600
kufana ne-superheater kodwa kunodonga oluncane kancane

Ishubhu le-Economizer
15CrMoG, 20G
ngaphansi kuka-450
ukumelana nokugqwala kwesigaba sokushisa okuphansi

Isihloko
12Cr1MoVG, P22, P91
eduze nokushisa komusi
udonga olujiyile, ukumelana nengcindezi, ukushibilika okuhle

Amapayipi amakhulu omusi
P22, P91, P92
540 kuya ku-620
amandla aphezulu okuhamba, ukumelana nokukhathala okushisa

3. Ukuhlukaniswa Ngokwenqubo Yokukhiqiza

Nakuba wonke angamapayipi angenamthungo, amapayipi e-Cr Mo ebanga le-boiler anezidingo ezikhethekile zenqubo.

Ukugoqa okushisayo noma ukukhipha okushisayo: ukusebenza kahle kokukhiqiza okuphezulu, ububanzi obukhulu, indawo enesilinganiso se-oxide. Kufanelekela amashubhu odonga aqinile aphakathi kuya kwamakhulu, njengezihloko namapayipi amakhulu omusi.

Ukudweba okubandayo noma ukugoqa okubandayo: ukunemba okuphezulu (kufika ku-plus noma minus 0.05 mm), indawo ebushelelezi. Ifanelekela ububanzi obuncane, amashubhu odonga amancane njenge-superheater kanye nama-serpentine coils okuvuselela.

Ukudweba okubandayo ngokwelashwa kokushisa okukhanyayo: ukuhlanzeka kwangaphakathi okuphezulu, akukho silinganiso se-oxide. Kufanelekela amapayipi amanzi okuhambisa anomfutho ophezulu kanye namapayipi ezinsimbi ezinembile.

Ngenxa yokuqukethwe kwazo okuphezulu kwe-alloy, izinsimbi ze-Cr Mo zidinga ukulawulwa okuqinile kwezinga lokushisa lokushisa kanye nezinga lokuguquguquka ngesikhathi sokugoqa okushisayo noma ukukhipha okushisayo ukuze kugwenywe ukuqhekeka noma ukungalingani kwesakhiwo esincane.

4. Ukuhlukaniswa Ngobubanzi Bangaphandle Nobukhulu Bodonga

Isigaba
Ububanzi obungaphandle (mm)
Ububanzi bokujiya kodonga (mm)
Isicelo esijwayelekile

Ishubhu elincane elinobubanzi
16 kuya ku-89
2 kuya ku-8
amakhoyili e-superheater kanye ne-reheater serpentine

Ishubhu eliphakathi nendawo
89 kuya ku-219
6 kuya ku-25
amashubhu e-downcomer kanye nokuxhuma

Ipayipi elikhulu lobubanzi
219 kuya ku-610
20 kuya ku-60
amakhanda namapayipi amakhulu omusi

5. Ukuhlukaniswa Ngokwezinga Elisebenzayo

Izimakethe ezahlukene zokuthumela kwamanye amazwe zidinga izinhlelo ezijwayelekile ezahlukene.

Izinga lesiShayina: GB/T 5310, amamaki afana ne-15CrMoG, 12Cr1MoVG, 12Cr2MoG.

Izinga laseMelika: I-ASTM A213 yobubanzi obuncane, i-A335 yobubanzi obukhulu, amazinga afana ne-T11, T22, T91, P11, P22, P91.

Izinga laseYurophu: EN 10216-2, amazinga afana ne-13CrMo4-5, 10CrMo5-5, X10CrMoVNb9-1 (okulingana ne-T91).

Izinga lesiJalimane: DIN 17175 (ethathelwe indawo yi-EN kodwa isasetshenziswa kumaphrojekthi amadala), amamaki afana ne-13CrMo44, 10CrMo910.

Izinga lomhlaba wonke: ISO 9329-2, amamaki ahambisanayo.

6. Ukuhlukaniswa Ngokwesimo Sokulethwa

Isimo sokulethwa kwamashubhu e-Cr Mo sithinta ngqo ukusebenza kwawo kwenkonzo.

Okujwayelekile nokuqinisiwe (N plus T): ukuqinisiwe kulandelwe ukuqinisiwe kwezinga lokushisa eliphezulu. Kusetshenziswa kumashubhu amaningi e-Cr Mo afana ne-15CrMoG kanye ne-12Cr1MoVG.

Okujwayelekile (N): ukujwayelekile kuphela. Kusetshenziselwa izinhlelo zokusebenza lapho izidingo zomthelela wokushisa okuphansi zingabalulekile.

Kucinyiwe futhi kuqiniswe (Q kanye no-T): ukucima kulandelwe ukuqinisa. Kusetshenziselwa amandla aphezulu kanye nezidingo zokuqina okuphezulu, isibonelo i-T91 kanye ne-P91.

Isixazululo siphathwe (S): sishiswa kuze kufike ekushiseni okuphezulu bese sipholiswa ngokushesha. Sisetshenziselwa amashubhu e-Cr Mo angagqwali e-austenitic njenge-TP347H (aqukethe i-Cr kodwa hhayi insimbi ejwayelekile ye-Cr Mo).