Ukucaciswa Kwepayipi kwe-ASTM A335 P22 (I-Chrome Moly Pipe) - IBHULO

Ingemuva Lobunjiniyela

Phakathi kwazo zonke izinsimbi ze-Cr-Mo alloy,I-ASTM A335 Ibanga P22imele esinye sezixazululo eziguquguqukayo kakhulu zeamapayipi{{0}aphezulu{1}}nezinga lokushisa eliphezulu.
Ihlanganisa2.25% chromiumfuthi1% molybdenum, ukwakha i-alloy matrix ekwazi ukumelana nokukhasa, i-oxidation, kanye ne-carburization ngesikhathi sokuchayeka isikhathi eside emazingeni okushisa afinyelela ku-620℃(1150℃F).

Le nto kade yaba yi-ihhashi lomsebenzi wokuphehla ugesi, indawo yokuhlanza, kanye nezinhlelo zamapayipi e-petrochemical, ukuvala igebe lokusebenza phakathi kwamabanga aphansi njenge-P11 nama-ferritic athuthukisiwe{1}}ama-martensitic alloys afana ne-P91.
Ibhalansi yayo yokwethembeka kwemishini, ukwakheka, kanye{0}}nokuqina kwesikhathi eside kuyenza ilungeleizihloko zesitimu, amashubhu okushisa kabusha, kanye{0}}nemigqa yokudlulisa izinga lokushisa eliphezulu.

I-alloy Design kanye ne-Metallurgical Fundamentals

UGrade P22 ungowakwa-isigaba se-ferriticzezinsimbi. Ukusebenza kwayo kuphuma ku-microstructure eyakhiwe ngokunembilei-ferrite ethukuthele kanye ne-chromium–molybdenum carbides ezinzile (M₂₃C₆, M₆C).

I-alloy Element	Okuqukethwe (%)	Iqhaza Ekusebenzeni
I-Cr (Chromium)	1.90 – 2.60	Yakha isendlalelo se-oxide esivikelayo futhi ithuthukise ukumelana nokukala
I-Mo (Molybdenum)	0.87 – 1.13	Inikeza{0}}isixazululo esiqinile sokuqiniswa kanye nokumelana nokukhuphuka
C (Ikhabhoni)	0.05 – 0.15	Ilawula ubulukhuni kanye nebhalansi ye-ductility
Mn (Manganese)	0.30 – 0.60	Ithuthukisa ukushisela nokuqina
I-Si (Silicon)	0.50 – 1.00	Ithuthukisa ukumelana ne-oxidation nokugqwala
P / S	Ngaphansi noma kulingana no-0.025	Igcina i-ductility futhi ivimbele ukubola komngcele wokusanhlamvu

Lokhu kumiswa kwe-metallurgical kuqinisekisa:

I-ferrite ezinzile{0}}i-carbide microstructureukumelana nokuqina ngaphansi komthwalo oshisayo.
Creep-ukuzinza kokuqhekekaamahora esevisi angaphezu kuka-100,000 ku-540-600 degree.
Ubuqotho be-weld obuhle kakhululapho-ukushisa kwe-weld{1}}kwelashwa (PWHT).
Ukukala kwe-oxidation okulawulwayo, kunciphisa ukuhwalala kwe-tube surface kanye nokumoshakala kwensimbi.

Ubuqotho Bemishini kanye Nokumelana Nezinga lokushisa

Impahla	Imfuneko	Inhloso yobunjiniyela
Amandla Okuqina	Kukhulu noma kulingana no-415 MPa (60 ksi)	Imelana{0}}nengcindezi yesikhathi eside ye-axial
Isivuno Amandla	Kukhulu noma kulingana no-205 MPa (30 ksi)	Ivimbela ukubola kwepulasitiki
Ukwelula	Kukhulu noma kulingana no-30%	Inikeza i-ductility yokwenziwa
Ukuqina	Ngaphansi noma kulingana nokuthi 163 HBW	Iqinisekisa ukuqina kwe-weld kanye nokumelana nokukhathala

Emazingeni okushisa aphakeme, i-P22 igcina i-akhasa-amandla okuphuka angaphezu kuka-60 MPa ngo-600 degree, igcina isimo sayo nobuqotho ngisho nangaphansi kwengcindezi yomjikelezo nokudlidliza.

Ubuchwepheshe Bokukhiqiza Nokwelashwa Kokushisa

Ngokungafani nezinsimbi eziphansi zekhabhoni, i-P22 idinga ukunembaukulawulwa kwe-thermal-mechanicalkukho konke ukukhiqiza.
I-Octal Pipe isebenzisa amasu okubumba angenamthungo ahlanganiswe neukwelashwa-okuningi kokushisaukuqinisekisa ukufana kwe-metallurgical nokunemba kobukhulu.

Umzila Wokukhiqiza:

Ukubhoboza Ibhilidi & Ukwakhiwa Okushisayo– Cr-Mo billets abhobozwa ku-1100–1150℃kusetshenziswa i-rotary extrusion.
Umdwebo Obandayo / Ukuginqika Okushisayo- Icolisa usayizi wokusanhlamvu nokufana kodonga.
Ukujwayela (940-980 degree)- Icwenga okusanhlamvu okusanhlamvu futhi incibilikisa ama-carbides ahlukanisiwe.
Ukushisa (675-760 degree)- Ikhulula izingcindezi zangaphakathi, ibuyisela i-ductility, futhi iqinise ama-carbides.
Ukuhlolwa kwe-Hydrostatic / Ultrasonic- Iqinisekisa amandla okucindezela nomsindo wesakhiwo.

Iukwelashwa kokushisa-okukabili(i-normalize + temper) ibalulekile. Iveza -i-matrix ye-ferrite ehlanzekile, eqinile emelana ne-embrittlement, igcina i-weld ductility, futhi inikeza ukusebenza okucatshangelwayo okubikezelwayo phakathi namashumi eminyaka esevisi.

I-Dimensional Scope

Ipharamitha	Ibanga
Ububanzi bangaphandle	½″ – 24″ (12.7 – 610 mm)
Ukuqina Kwezindonga	1.2 - 100 mm
Ubude	Kufika ku-12 m (SRL/DRL/ngokwezifiso)
Ukuqondile	Ngaphansi noma kulingana no-0.8 mm / m
Qeda Uhlobo	I-Beveled / Plain / Intambo

Ukwenziwa ngokwezifiso njengeU-ukugoba, ama-spools, nama-header assembliesayatholakala uma ecelwa amandla ashisayo kanye nezinhlelo zokuhluza.

Ukusebenza Ngaphansi Kwezinga Lokushisa Eliphakeme

Ezimweni zokusebenza ezingaphezu kuka-550 degree, i-P22 yenza aungqimba oluminyene lwe-Cr₂O₃ oxideenamathela kusisekelo sensimbi, evimbela ukubola nokulahlekelwa kwensimbi.
Le filimu isebenza njenge-a{0}}isithiyo sokuziphilisa, igcina ukusebenza kahle kokudlulisa ukushisa kanye nokushelela kwendawo kukho konke ukuchayeka isikhathi eside.

Izici zokusebenza ezibalulekile:

Amandla e-Creep aphezulu:Izinzile ngaphansi komthwalo oqhubekayo nokuhamba ngengcindezi.
Ukumelana Ne-Thermal Fatigue:I-fine-i-matrix esanhlamvu ivimbela ukuqhekeka ngaphansi kwemijikelezo yokunwetshwa.
Ukuzinza kweDimensional:Ukwandiswa kwe-thermal ephansi kuqinisekisa ukuhambisana kwe-weld okungaguquki.
Ukusebenza kwe-Weld:I-PWHT ibuyisela i-ductility futhi iqede ingcindezi eyinsalela.
Ukumelana ne-Oxidation:Ukuvikelwa okuthembekile kufika ku-620℃, okunweba izikhawu zokuhlola.

Ukuqaliswa Kwezimboni

I-ASTM A335 P22 alloy pipe isatshalaliswa kabanzi kuukukhiqiza amandla, i-petrochemical, futhiukucwengaimikhakha, ikakhulukazi kui-superheater, i-reheater, kanye{0}}namasekhethi e-feedwater anomfutho ophezulu.

Izicelo ezimele abanye:

I-Boiler & Reheater Tubingamayunithi angaphansi kanye ne-supercritical.
Cubungula izihloko ze-Steamfuthiabezomnothoezitshalweni zikagesi.
Imishini yokucwenga kanye ne-Petrochemical Furnaceslapho kuhlangana khona amagesi e-carburizing kanye ne-oxidizing.
Amagobolondo okushintsha ukushisafuthiizinguquko eziningikudinga{0}}ukuzinza kwe-metallurgical yesikhathi eside.

Irekhodi layo lenkonzo kungqalasizinda yamandla liqinisekisa ukufaneleka kwayoukusebenza okuqhubekayo kanye nesikhathi esincane sokuphumula, okwenza i-P22 ibe into ebalulekile ezitshalweni{1}}ezisebenza kahle emhlabeni wonke.

Ukuhlola Nokuqinisekisa Ikhwalithi

Yonke imikhiqizo ihambisanaI-ASTM A335 / A999futhiI-ASME SA335amazinga, aqinisekiswa ngokuthi:

Ukuhlolwa kwe-Hydrostatic noma i-ultrasonic
Ukuhlolwa kokucaba nokuvutha
Ukuqinisekiswa kwempahla yemishini (ukushuba, ubulukhuni)
Ukuhlolwa kobukhulu nokubonakalayo
Umthelela ozikhethela wona kanye nokuhlolwa kwe-radiographic

Yonke inqwaba ilethwa nayoEN 10204 3.1/3.2 isitifiketi, ukulandeleka okugcwele, namarekhodi okuhlola okugaya.

Ukuthembeka Kobunjiniyela nge-Octal Pipe

I-Octal Pipe inikezela ngamapayipi we-ASTM A335 P22 ngaphakathiisimo esijwayelekile nesithambile, ukuqinisekisa ukusebenza okubikezelwe{0}}kwezinga lokushisa eliphezulu nokuhambisana kwe-weld.
Ngokukhiqiza okuqinisekisiwe kwe-ISO-, ukuhlanganiswa kwe-QA/QC, kanye{1}}nemibhalo{1}}yezinga lephrojekthi, i-Octal Pipe iletha amasistimu amapayipi engxubevange athembekileezishisayo, zokuhluza, nezimboni zezinqubo emhlabeni jikelele.

Xhumana manje

FAQ

Q1: Lisetshenziselwa ini ipayipi le-ASTM A335 P22 (ASME SA335 P22)?

A1:Izinga lokushisa eliphezulu-eliphezulu,{1}}eliphezulu{1}}amapayipi esevisi yokucindezela ezimbonini zikagesi, izindawo zokuhluza, namayunithi e-petrochemical.

Q2: Iluphi uhlelo lwe-alloy olujwayelekile lwepayipi le-P22?

A2:I-2.25Cr-1Mo (i-chrome-moly) insimbi ye-ferritic alloy edizayinelwe ukukhasa kanye nokumelana ne-oxidation.

I-Q3: Yikuphi ukwelashwa okushisa okuvame ukudingeka kupayipi le-P22?

A3:Ukushisa nokushisa okujwayelekile (N+T) ngamarekhodi okwelapha okushisa abhaliwe{1}}.

Q4: Kufanele ngikhethe nini i-P22 esikhundleni se-P11 noma i-P91?

A4:Khetha i-P22 njengebanga eliphakathi-elilinganayo lezinga lokushisa eliphakeme/elikhuphukayo kune-P11, kodwa ngaphandle kwezindleko/izilawuli eziphakeme ngokuvamile ezihlotshaniswa ne-P91.

Q5: Yini okufanele ngiyicele ukuze ngiqinisekise ikhwalithi yepayipi le-P22 ngaphambi kokuthenga?

A5:ZU 10204 3.1/3.2 MTC enokulandeleka kokushisa, imiphumela yemishini/yekhemistri, ubulukhuni, nokuhlolwa kwe-hydrostatic noma kwe-UT njengoba kucacisiwe.