ASTM A335 P9 Alloy Irin Pipe

ASTM A335 Gr. P9 jẹ paipu alloy alloy ti ko ni ailopin ti a ṣe apẹrẹ funlemọlemọfún iṣẹ ni pele otutu ati titẹ. Pẹlu nipa9% chromium ati 1% molybdenum, O joko ni idile 9Cr-1Mo ti a lo ni lilo pupọ ni iṣelọpọ agbara, awọn igbona petrochemical, awọn atunṣe, ati awọn laini ilana ti o gbona.

NiOctal Pipe, P9 paipu ti wa ni pese nideede ati tempered majemu, ti ni idanwo ni kikun, ati itọpa si ooru/ipele, o dara fun awọn igbomikana, awọn akọle, awọn igbona nla, awọn laini nya si ati giga -ilana ilana fifi ọpa ti o ga nibiti irin erogba lasan ati kekere{{1}Cr alloys ko le ṣetọju ifoyina tabi ipakokoro.

Ko dabi irin erogba arinrin, P9 ti ṣe agbekalẹ lati tọju agbara ati iduroṣinṣin dada lẹhinegbegberun wakatini ga irin otutu.

• Chromium (~9%)fọọmu kan iwapọ, adherentCr₂O₃ fiimulori oke, fifalẹ igbelosoke ati oxidation ni ategun gbigbona tabi awọn afefe gaasi adalu -.
• Molybdenum (~ 1%)ṣe okunkun matrix ferritic ati idaduro abuku ti nrakò nipa didaduro gbigbe gbigbe kuro.
• Lẹhinnormalizing + tempering, irin fihan atempered ferrite – carbide bepẹlu awọn aala ọkà idurosinsin ati awọn carbides iṣakoso (paapaa M₂₃C₆ / M₆C) lẹba awọn aala - eyi ni ohun ti o ntọju agbara ti nrakò - ati ki o yago fun didasilẹ aala ọkà lakoko ifihan pipẹ.

Nitoribẹẹ, ni iṣẹ iwọn otutu giga{{0} (awọn coils superheater, awọn laini gbigbe atunṣe), P9 duro ni iduroṣinṣin ni iwọn to gun ju awọn ohun elo P5/P11 lọ.

Iṣapọ Kemikali (ibiti o wọpọ)

Awọn ohun-ini ẹrọ (ASTM A335 P9)

• Agbara fifẹ:Ti o tobi ju tabi dogba si 415 MPa
• Agbara ikore:Ti o tobi ju tabi dogba si 205 MPa
• Ilọsiwaju:Ti o tobi ju tabi dọgba si 30%
• Lile:Kere ju tabi dọgba si 163 HBW

Awọn iye wọnyi wa fun ipo deede gbigbe {{0}ati{1}} ati pe a pinnu lati fun alloy to ni ala fun titẹ ati apẹrẹ iwọn otutu.

Lati rii daju pe kemistri 9Cr{2}}1Mo yipada nitootọ si giga ti a beere fun-iwọn iwọn otutu microstructure, Octal Pipe gba ipa ọna pipe-pipa ti o ni idari:

• Billet & lilu

Clean Cr{{0}Mo billet ti wa ni igbona si iwọn otutu lilu to dara (ni ayika 1100–1150 iwọn), lẹhinna gun / elongated lati ṣe awọn iho pẹlu sisan ọkà isokan.

• Gbona sẹsẹ / tutu iyaworan

Iwọn odi ni a mu wa si iṣeto ti a paṣẹ (SCH 10 - SCH 160). Iṣe deede agbedemeji le ṣee lo nigbati idinku eru tabi awọn ifarada ti o sunmọ.

• Iṣe deede (isunmọ{0}}-950 iwọn)

Ṣe atunṣe ferrite, tu awọn ti kii ṣe - carbide aṣọ, yọ awọn aapọn inu kuro lati dida.

• Ooru (isunmọ{0}}-760 iwọn)

Mu pada ductility ati awọn titiipa ni pinpin carbide ti o fẹ ki awọn ohun-ini rupture ti nrakò baamu awọn ibeere ASTM.

• Iṣakoso didara

1. Ultrasonic / eddy{0}} NDT lọwọlọwọ lori ara paipu ati awọn opin
2. Idanwo Hydrostatic
3. Lile ati iṣapẹẹrẹ darí fun ipele
4. Ijẹrisi EN 10204 3.1/3.2 fun wiwa kakiri

Abajade jẹ paipu pẹlu itanran, boṣeyẹ tan awọn carbides ati iduroṣinṣin ferritic matrix - eto ti o fẹ fun iṣẹ gbigbona igba pipẹ{{1}.

Awọn gigun pataki ati awọn ifarada tighter ni a le jiroro fun awọn iṣẹ igbomikana / HRSG.

Nigbati iwọn otutu irin ba ga si600-700 iwọn, P9 ntọju awọn nkan meji ti awọn ipele kekere bẹrẹ lati padanu:

• Dada iyege– Cr{0} film oxide ọlọrọ fa fifalẹ idagbasoke iwọn ati ki o dinku itọjade afẹfẹ oxide, nitoribẹẹ gbigbẹ tube ati didin ogiri jẹ o lọra.
• Iduroṣinṣin ti nrakò- pẹlu Mo ni ojutu ati awọn carbides iṣakoso, alloy le de ọdọ awọn agbara rupture ti nrakò lori aṣẹ ti o nilo fun iṣẹ 10⁴ h ni ayika iwọn 600.

Ti o ni idi ti P9 ti wa ni pato nigbagbogbo fun:

• Awọn ohun elo agbara:superheater ati reheater tubes, nya afori, gbona akọkọ nya ila
• Awọn igbona atunmọ / petrochemical:awọn ọpọn atunṣe, awọn laini gbigbe, gaasi ti o gbona{{0}
• Awọn ohun ọgbin ilana iwọn otutu giga{{0}:ooru exchangers, manifolds, riakito kikọ sii ila
• Awọn ẹya gbigbona epo & gaasi:abẹrẹ nya si, hydrogen{0}} awọn laini ilana ti n ṣiṣẹ labẹ awọn ipo gbigbona ati iyipo

Akawe pẹlu P5/P11, P9 ipesedara ifoyina iṣakoso ati losokepupo microstructural coarsening, eyiti o tumọ nigbagbogbo si awọn aaye arin ayewo gigun.

• Production toASTM A335 / ASME SA-335ati ki o jẹmọ ISO / EN ibeere
• Ifijiṣẹ nideede ati temperedipo
• Mechanical, NDT, hydrostaticigbeyewo iroyin fun gbogbo ipele
• 3.1 / 3.2 awọn iwe-ẹriwa
• Iṣakojọpọ dara fun okeere ati irinna gigun -
• Ise agbese - Atilẹyin ipele QA/QC fun agbara, isọdọtun ati awọn olugbaisese ọgbin ọgbin

FAQ

 

 

Q1: Kini ASTM A335 P9 (ASME SA335 P9) paipu ti a lo fun?

A1:chrome ti ko ni ailopin{0}}moly alloy pipe fun giga{1}}iwọn otutu, giga{2} iṣẹ titẹ ni agbara ati awọn ọna ṣiṣe petrochemical.

Q2: Kini "9Cr-1Mo" tumọ si fun paipu P9?

A2:O tọka si apẹrẹ alloy pẹlu chromium giga ati molybdenum fun resistance oxidation ati igbega - agbara iwọn otutu.

Q3: Bawo ni P9 ṣe yatọ si P22 tabi P91?

A3:P9 jẹ ipele 9Cr-1Mo; P22 jẹ 2.25Cr-1Mo, lakoko ti P91 jẹ ipele 9Cr-1Mo ti a ṣe atunṣe pẹlu awọn idari irin ti o ni wiwọ.

Q4: Iru ooru{1}}Ipo itọju wo ni a maa n tọka si fun paipu A335 P9?

A4:Ooru ti a ti ṣakoso ni-ipo itọju (ti o ṣe deede deede ati igbona) pẹlu awọn igbasilẹ ti a gbasilẹ bi o ṣe nilo nipasẹ aṣẹ/pato.

Q5: Kini MO le beere lati rii daju didara pipe P9 ṣaaju rira?

A5:3.1 MTC pẹlu itọpa ooru, kemistri / awọn abajade ẹrọ, ati NDE/hydrotest nilo fun sipesifikesonu akanṣe.

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