Incoloy 825 Seamless Tube: ASTM B163 Specification rau Heat Exchanger thiab Condenser Service

Thaum lub tshav kub exchanger los yog condenser yuav tsum muaj sia nyob sulfuric acid, dej hiav txwv, los yog qaub roj rau kaum xyoo, ob qho kev txiav txim siab txiav txim siab txhua yam: lub raj alloy, thiab cov specification nws yog yuav tawm tsam. Rau npib tsib xee- alloy lub luag haujlwm, ib qho kev sib xyaw ua ke tau dhau los ua cov qauv kev lag luam -alloy 825(UNS N08825, DIN 2.4858, Incoloy® 825) muab los ua seamless raj rau ASTM B163, tus qauv specification rau seamless npib tsib xee thiab npib tsib xee alloy condenser thiab tshav kub-exchanger tubes.

Kab lus no teb cov lus nug engineers, buyers, thiab tu pab pawg neeg nug feem ntau: dab tsi lub alloy yog dab tsi, dab tsi ASTM B163 tiag tiag xav tau, yuav ua li cas cov hlab yog tsim thiab sim, yuav ua li cas 825 piv nrog lwm yam xws li 316L thiab Alloy 625, thiab yuav ua li cas qhia lub raj kom raug rau koj qhov project. Txhua ntu pib nrog qhov xaus ncaj qha, yog li cov ntsiab lus tseem ceeb tuaj yeem raug muab rho tawm thiab raug xa mus sai

Incoloy 825 (Alloy 825, UNS N08825) yog dab tsi?

Incoloy 825 - officially Alloy 825, UNS N08825, DIN 2.4858 - yog ib qho khoom siv- kev daws teeb meem - zog npib tsib xee- hlau-chromium alloy nrog molybdenum, tooj liab, thiab titanium, thiab nws yog ib qho ntawm cov khoom siv hluav taws xob ntau tshaj plaws thiab cov khoom siv sib txawv Cov tshuaj lom neeg txhoj puab heev.

"Incoloy" yog ib lub cim lag luam ntawm Special Metals Corporation; Lub npe metallurgical generic yog Alloy 825, los yog UNS N08825. Tsev neeg Incoloy npog npib tsib xee- hlau-chromium alloys, thiab 825 yog nws cov tswv cuab nrov tshaj plaws rau kev pabcuam aqueous corrosion.

Cov nominal muaj pes tsawg leeg yog kwv yees li 40% npib tsib xee, 21% chromium, thiab 22% hlau, ntxiv txog 2.8% molybdenum, 2.3% tooj liab, thiab 1% titanium [3]. Cov ntsiab lus npib tsib xee siab ua rau cov qauv ua kom muaj austenitic thiab ua rau muaj kev tiv thaiv zoo rau kev ntxhov siab chloride-corrosion tawg; titanium ntxiv stabilizes alloy tiv thaiv rhiab heev thiab intergranular corrosion tom qab vuam.

Hauv cov ntsiab lus yooj yim, Alloy 825 coj zoo li "super stainless hlau": ntau dua corrosion- tiv taus ntau dua 316L hauv cov kua qaub thiab cov tshuaj chlorides, tseem tseem ductile, weldable, thiab yooj yim rau fabricate - raws nraim qhov sib xyaw ua ke ntawm cov raj xa dej xav tau.

ASTM B163 yog dab tsi, thiab Vim li cas nws thiaj tswj tau Alloy 825 Thaum tshav kub kub-Txiv Tubes?

ASTM B163 (tau txais raws li ASME SB-163) yog tus qauv specification rau seamless npib tsib xee thiab npib tsib xee alloy condenser thiab tshav kub exchanger raj; Nws yog cov ntaub ntawv uas txhais tau tias yuav tsum ua li cas Alloy 825 tube yuav tsum tau ua, nws yuav tsum ua pov thawj li cas, thiab nws yuav tsum tau kuaj li cas rau kev sib pauv kev pabcuam.

Scope. B163 npog seamless raj ntawm npib tsib xee thiab npib tsib xee alloys rau condenser thiab cua sov- kev pab cuam pauv, muab raws li sab nraud- txoj kab uas hla - thiab - nruab nrab - phab ntsa lossis sab nraud - txoj kab uas hla - thiab - qhov tsawg kawg nkaus - phab ntsa Qhov ntau thiab tsawg them yog 3 nyob rau hauv (76.2 hli) thiab nyob rau hauv sab nraud txoj kab uas hla, nrog tsawg kawg nkaus phab ntsa thicknesses ntawm 0.148 nyob rau hauv (3.76 hli) thiab nyob rau hauv, los yog nruab nrab phab ntsa thicknesses ntawm 0.165 nyob rau hauv (4.19 hli) thiab nyob rau hauv.

Dab tsi tus qauv tswj. B163 kho cov tshuaj muaj pes tsawg leeg txwv rau txhua qib tso cai (xws li UNS N08825), qhov xav tau cov khoom siv kho tshuab, cua sov- kho mob, qhov ntev ntev, kev ua haujlwm thiab ua tiav, thiab cov txheej txheem ntsuas kev ntsuas - tshuaj ntsuam xyuas, nro, hardness, flattening, flaringe, thiab kev ntsuas siab.

Vim li cas nws tseem ceeb rau kev lag luam. Kev txiav txim "Incoloy 825 tube" yam tsis muaj tus qauv tawm ntawm chemistry, mechanicals, thiab testing unforceable. Kev qhia txog ASTM B163 / ASME SB-163 ua rau txhua tus ntawm cov kev xav tau no tuaj yeem txheeb xyuas tau thiab txheeb xyuas tau, thiab nws yog lub hauv paus ntawm daim ntawv pov thawj zeb xeem uas cov neeg yuav khoom cia siab rau [9]. B163 zaum nrog tus khub specs xws li B161 (nickel seamless yeeb nkab thiab raj), B165 (alloy 400), thiab B829 (kev xav tau dav dav); welded exchanger raj yog tswj los ntawm B704 / B676, tsis yog los ntawm B163.

Dab tsi tshuaj muaj pes tsawg leeg ua ASTM B163 Yuav tsum tau rau Alloy 825 Seamless Tube?

ASTM B163 xav kom Alloy 825 raj kom tau raws li UNS N08825 muaj pes tsawg leeg txwv: nickel 38.0–46.0%, chromium 19.5–23.5%, molybdenum 2.5–3.5%, tooj liab 1.5–3.0%, titanium 0.6–1.2%, sib npaug rau hlau 0.05%, manganese Tsawg dua lossis sib npaug li 1.0%, silicon Tsawg dua lossis sib npaug li 0.5%, sulfur Tsawg dua lossis sib npaug rau 0.03%, thiab aluminium Tsawg dua lossis sib npaug li 0.2%.

Table 1 - Tshuaj muaj pes tsawg leeg ntawm Alloy 825 (UNS N08825), qhov hnyav %

Hauv cov lus yooj yooj yim: npib tsib xee tiv thaiv kev ntxhov siab-corrosion tawg hauv chlorides; chromium tiv thaiv oxidizing acids; molybdenum fights pitting thiab pab txo acids; tooj liab pab cov alloy passivate nyob rau hauv sulfuric acid; thiab titanium "xauv" cov pa roj carbon yog li lub raj tsis nkag siab thiab corrode raws cov ciam teb tom qab vuam. Qhov tsib -element tshuav nyiaj li cas yog vim li cas 825 outperforms zoo tib yam stainless hlau nyob rau hauv tov kua qaub-plus- chloride kev pab cuam.

Dab tsi yog Cov Khoom Siv Hluav Taws Xob Uas ASTM B163 Yuav Tsum Tau Rau Alloy 825 Seamless Tube?

Nyob rau hauv lub annealed mob nyob rau hauv uas B163 Alloy 825 exchanger raj yog ib txwm muab, cov yam tsawg kawg nkaus uas yuav tsum tau muaj yog: tensile zog 85 ksi (586 MPa), 0.2% offset yield zog 35 ksi (241 MPa), thiab elongation 30% nyob rau hauv 2 nyob rau hauv (50 mm) los yog verified hardness .

Table 2 - ASTM B163 txhua yam yuav tsum tau ua rau annealed Alloy 825 raj

B163 kho qhov kub thiab txias (qhov xwm txheej) rau txhua qib; Alloy 825 yog muab tso rau hauv annealed, uas optimizes corrosion kuj thiab fabricability, thiab cov khoom siv raj yuav tsum ua raws li qhov tsawg kawg nkaus qhov tseem ceeb thaum kuaj ib tug ntau [1][2]. Qhov 30% elongation yuav tsum tsis yog tshuaj pleev ib ce: exchanger tubes yog mechanically nthuav mus rau hauv cov ntawv raj thiab feem ntau flared, yog li ductility yog ib tug yuav tsum tau ua, thaum lub 85/35 ksi ua ke muab txaus lub zog rau nyias - phab ntsa, siab - siab ua hauj lwm.

Incoloy 825 Seamless Tube Ua li cas rau ASTM B163?

B163 Alloy 825 seamless raj pib los ntawm cov khoom siv hluav taws xob, kub ua haujlwm los ntawm extrusion lossis rotary tho, tom qab ntawd txias ua haujlwm los ntawm pilgering lossis kos duab rau qhov kawg qhov ntev, cov tshuaj annealed thiab dej quenched, straightened, thiab tiav - nws tsis muaj longitudinal weld seam vim tsis muaj dab tsi ua.

Seamless tiv thaiv welded. Welded exchanger tube (B704/B676) yog tsim los ntawm sawb thiab seam-welded; seamless raj yog tsim los ntawm ib tug pierced los yog extruded hollow. Tshem tawm cov vuam seam tshem tawm cov raj feem ntau tsis ua hauj lwm nyob rau hauv cyclic thermal kev pab cuam, muab ib tug niaj hnub phab ntsa, thiab khaws cia tag nrho siab ncaj ncees.

Txoj kev ua haujlwm zoo: cov thom khwm los yog extrusion ntawm forged billet → txias pilgering thiab kos duab nyob rau hauv ntau qhov kev sib tw nrog nruab nrab anneals → kawg tov anneal (kwv yees li 940-1010℃/ 1725-1850℃F rau 825) ua raws li cov dej quenching → sab hauv thiab ncaj qha Qhov kawg anneal restores stabilized, tag nrho austenitic microstructure thiab optimum corrosion kuj.

Rau kev sib pauv kev pabcuam, qhov chaw saum npoo tseem ceeb npaum li chemistry: ib qho huv si sab hauv (pickled lossis ci-tiav) tsis txhob kis cov kua dej thiab txhim kho corrosion. Qhov no yog tus qauv zeb xyaum rau condenser - qib raj.

ASTM B163 Yuav Tsum Tau Li Cas?

ASTM B163 mandates chemical analysis, tensile tests, hardness checks, flattening and flaring tests, and a pressure test (hydrostatic or air- under - dej) los yog sib npaug kev ntsuam xyuas tsis muaj kev puas tsuaj; cov tuam txhab muaj lub luag haujlwm tseem ua cov ntaub ntawv pov thawj zoo (PMI) thiab teeb meem EN 10204 3.1/3.2 mill daim ntawv pov thawj.

Kev xeem los ntawm kev xeem, txhua qhov yuav tsum tau ua yog dab tsi:

• Kev tshuaj ntsuam xyuas tshuaj - txheeb xyuas UNS N08825 muaj pes tsawg leeg txwv ntawm txhua qhov cua sov (ntau).
• Tension test - txheeb xyuas lub zog tensile, yield zog, thiab elongation yam tsawg kawg nkaus rau ib qho.
• Hardness - Rockwell los yog sib npaug, lees paub qhov mob annealed.
• Flattening test - ua pov thawj tias lub raj tuaj yeem ua kom tsis txhob tawg; kuaj xyuas kev ua haujlwm.
• Flaring test - qhov twg cov hlab yuav flared los yog nthuav, ua pov thawj kawg ductility.
• Kev ntsuas siab - hydrostatic (los yog huab cua- hauv qab - dej) ntawm txhua lub raj, tshwj tsis yog hloov NDE txoj kev; eddy-tam sim no los yog ultrasonic kuaj muab 100% volumetric kev pab them nqi tsis muaj dej.

Tus neeg muab kev pabcuam zoo tshaj plaws rau kev sib pauv lub luag haujlwm - 100% PMI ntawm cov raj tiav, qhov ntsuas qhov ntev thiab qhov ntev, thiab daim ntawv pov thawj EN 10204 3.1 (3.2 nrog peb tus neeg tim khawv). Cov neeg yuav khoom yuav tsum sau cov no rau hauv daim ntawv xaj khoom es tsis xav tias lawv.

Vim li cas thiaj xaiv Incoloy 825 tshaj 316L, Alloy 20, lossis Alloy 625 rau Cov Hluav Taws Xob thiab Cov Condensers?

Alloy 825 muab tus nqi zoo tshaj plaws - kev ua tau zoo sib npaug rau cov neeg sib pauv uas yuav tsum tau ua cov kua qaub sib xyaw, chlorides, dej hiav txwv, lossis cov roj qaub: 316L tsis ua haujlwm hauv cov dej num no, Alloy 20 npog lub qhov rais chemistry nqaim, thiab Alloy 625 muaj zog thiab raug nqi ntau dua li cov kev pabcuam sib pauv feem ntau xav tau.

Cov lus 3 - Alloy kev sib piv rau cov cua sov- kev sib pauv thiab condenser kev pabcuam

316L yog pheej yig thiab zoo nyob rau hauv cov dej benign, tab sis nws ua tsis tau sai nyob rau hauv chloride kev nyuaj siab -corrosion cracking thiab nyob rau hauv sulfuric acid saum nruab nrab concentrations - ob feem ntau exchanger tsis ua hauj lwm. Alloy 20 yog tsim los rau sulfuric acid thiab ua tau zoo nyob rau ntawd, tab sis nws tag nrho cov ntau yog nqaim tshaj 825 thiab nws yog tsawg tsim nyob rau hauv seawater thiab qaub kev pab cuam. Alloy 625 muab kev ua tau zoo tshaj plaws tab sis tus nqi kwv yees li ob zaug ntau npaum li 825, thiab nws lub zog siab dua tsis xav tau rau lub raj - daim ntawv nthuav dav.

Engineering txoj cai ntawm tus ntiv tes xoo: yog tias lub luag haujlwm yog "kev txhoj puab heev tab sis tsis hnyav," 825 feem ntau yog qhov kev xaiv txaus thiab kev lag luam ntse - thiab hauv ntau qhov qauv nws yog qhov ncaj qha poob - hauv kev hloov kho los ntawm 316L.

Qhov twg yog Incoloy 825 Seamless Tubes siv thaum tshav kub kub-Kev Pab Cuam Tshuam thiab Condenser?

Alloy 825 seamless raj yog siv nyob rau txhua qhov chaw sib hloov lossis condenser yuav tsum tiv taus acids, chlorides, seawater, los yog qaub txheej txheem kwj: sulfuric thiab phosphoric acid coolers, seawater -cooled exchangers, refinery thiab qaub- gas intercoolers thiab condensers, flue {{3} chemical processing, nuclear thiab chemical processing. khoom siv reprocessing.

Kev ua tshuaj lom neeg - kev pabcuam sulfuric acid (tiv taus txog li 60% kua qaub ntawm qhov ntsuas kub thiab qhov dav ntawm qhov kub siab), phosphoric acid, nitric acid, thiab organic acids: acid coolers, condensers, thiab evaporators.

Cov roj thiab roj - qaub- roj thiab roj- lub qhov dej txias thiab cov condensers, amine units, thiab tsim tawm - dej kub exchangers; cov npib tsib xee-molybdenum- tooj liab tshuav tiv thaiv H₂S/CO₂/chloride ua ke.

Marine thiab offshore - seawater-cooled exchangers thiab desalination evaporators thiab condensers, qhov twg molybdenum ntxiv rau tooj liab muab cov dej hiav txwv zoo nrog kev ntxhov siab- corrosion resistance.

Kev tswj cov pa phem - flue- gas desulfurization scrubbers, flue- gas reheat exchangers, thiab quench systems.

Nuclear - dissolvers thiab txheej txheem cov cuab yeej hauv roj reprocessing uas lis sulfuric thiab nitric sib tov.

Koj Yuav Tsum Qhia Li Cas thiab Tsim Nyog Incoloy 825 Seamless Tube rau Koj Txoj Haujlwm?

Qhia meej "ASTM B163 (ASME SB-163), UNS N08825, annealed" nrog rau sab nraud txoj kab uas hla, phab ntsa thickness thiab phab ntsa hauv paus (yam tsawg kawg nkaus los yog nruab nrab), ntev, kam rau ua, thiab cov kev xeem yuav tsum tau teev nyob rau hauv kev sau ntawv, thiab yuav tsum tau ib tug EN 10204 3.1/3.2 zeb daim ntawv pov thawj ntxiv rau PMI ntawm tau txais.

• Txheem thiab qib - sau "ASTM B163 / ASME SB-163, UNS N08825, annealed"; Tsis txhob xaj "tsuas yog Incoloy 825".
• Dimensions - raws nraim sab nraud txoj kab uas hla thiab phab ntsa, thiab hais seb lub phab ntsa yog yam tsawg kawg nkaus -phab ntsa los yog nruab nrab- phab ntsa; lawv nqa txawv tolerances thiab loj.
• Length thiab kawg condition - ntev, square-txiav xaus, straightness thiab kam rau ua.
• Kev ntsuam xyuas - hydrostatic piv rau eddy-kev xaiv tam sim no/ultrasonic, flattening thiab flaring, thiab 100% PMI.
• Cov ntaub ntawv - EN 10204 3.1 daim ntawv pov thawj (3.2 nrog rau thib peb- neeg pov thawj) thiab tag nrho cov ntaub ntawv pov thawj rau cov cua sov thiab cov lej ntau.
• Tau txais kev tshuaj ntsuam xyuas - phim daim ntawv pov thawj tshav kub rau cov cim raj, khiav PMI ntawm cov qauv, txheeb xyuas qhov ntev thiab qhov chaw nyob (tsis muaj khawb, qhov, lossis kho vuam).
• Pitfalls kom tsis txhob - "sib npaug" hloov pauv yam tsis tau txais kev pom zoo, yam tsawg kawg nkaus - phab ntsa tiv thaiv qhov nruab nrab- phab ntsa tsis meej pem, lees txais lub raj tsis muaj daim ntawv pov thawj, thiab tsis yog - cov khoom lag luam uas ua tsis tiav flaring lossis flattening.