lus 825yog npib tsib xee- hlau-chromium alloy (Ni 38–46%, Fe 22% min, Cr 19.5–23.5%) nrog txhob txwm tshaj tawm ntawm molybdenum (2.5–3.5%), tooj liab (1.5–3.0%), thiab titanium (0.6–2%). Qhov sib ntxiv ntawm titanium yog qhov hloov pauv tseem ceeb ntawm no. Nws stabilizes lub alloy tiv thaiv rhiab heev - intergranular chromium carbide nag lossis daus uas wrecks corrosion kuj nyob rau hauv tshav kub- cuam tshuam cheeb tsam (HAZ) tom qab vuam. Hauv txoj kev xav, qhov no txhais tau tias N08825 yuav tsum tau vuam kom huv si yam tsis xav tau kev tshaj tawm -weld solution annealing.
HT PIPE yog ib tug thawj coj stockist thiab exporter thoob ntiaj teb nrog ntau tshaj 16 xyoo ntawm kev txawj ntse nyob rau hauv thoob ntiaj teb kev lag luam. Peb muab cov kav dej, daim hlau, cov kab tuav, thiab ntau yam ntawm cov yeeb nkab fittings, flanges, thiab li qub.Tiv tauj pebtam sim no rau cov quotes dawb thiab cov ntaub ntawv khoom ntiag tug.
Cov Khoom Muag Khoom
Bar & Rod
Phaj & Ntawv
Coil & Sawb
Tube & Tube
Haum: Flange, Tee, Luj Tshib, Reducer thiab lwm yam.
Forging: Nplhaib, Ncej, Vajvoog, Thaiv thiab lwm yam.
Cov txheej txheem tsim khoom: Yuav ua li cas Welded thiab Seamless N08825 Yeeb Nkab Ua Tau tiag tiag
Seamless Incoloy 825 Yeeb Nkab (ASTM B423 / ASME SB423)
Seamless N08825 yeeb nkabpib raws li ib tug centrifugal cam khwb cia ingot los yog ib tug forged billet. Lub billet yog pierced kub siv ib tug teb tho pob zeb (Mannesmann txheej txheem) los yog, rau loj diameters, extruded los ntawm ib tug piercer - thiab - extruder teeb. Lub plhaub hollow yog ces dov los yog kos rau qhov kawg qhov ntev.
Qhov tseem ceeb ntawm kev tsim khoom sib txawv rau seamless 825:
Extrusion kub qhov rais: N08825 yog tawv - nws cov haujlwm kub yog nqaim dua 316L. Extrusion kub feem ntau khiav 1100-1180 degree, thiab lub qhov rais ntawm txaus txaus thiab incipient melting yog nruj. Nias kub heev thiab koj tau lub kua muag nto; txias heev thiab cov cuab yeej load spikes thiab lub plhaub tawg.
Txias daim duab hla dhau: Rau qhov ntau thiab tsawg hauv qab 2-nti OD, ntau qhov kev kos duab txias dhau los nrog qhov nruab nrab anneals yog tus qauv. Txhua qhov anneal yog ua tiav ntawm 980℃yam tsawg kawg nkaus, ua raws li qhov txias txias (dej quench lossis yuam cua) kom tsis txhob hnov qab.
Phab ntsa kam rau ua: Seamless yeeb nkab feem ntau tuav ± 12.5% ntawm phab ntsa thickness ib ASTM B423. Rau nyias- cov ntawv siv phab ntsa (xws li cov raj xa hluav taws xob mus rau B163), nruj dua kev ua siab ntev ntawm ± 10% lossis zoo dua tuaj yeem ua tiav tab sis ntxiv tus nqi.
Welded Incoloy 825 Yeeb Nkab (ASTM B705 / ASME SB705)
Welded N08825 yeeb nkabyog tsim los ntawm dov phaj los yog sawb. Cov khoom lag luam tiaj tus yog tsim rau hauv cov duab cylindrical thiab welded - feem ntau los ntawm TIG (GTAW) los yog, rau cov kab uas loj dua, los ntawm SAW (submerged arc vuam) los yog ua ke TIG + SAW txheej txheem. Autogenous TIG (tsis muaj qhov muab tub lim) qee zaum siv rau nyias- phab ntsa tubing, tab sis feem ntau B705 ntau lawm siv ERNiFeCr-1 muab tub lim (AWS A5.14 kev faib tawm) kom ntseeg tau tias cov khoom siv hlau vuam sib txuas nrog cov niam txiv hlau.
Qhov tseem ceeb ntawm kev tsim khoom sib txawv rau welded 825:
Phaj zoo: Lub phaj pib txiav txim siab txhua yam. Yog tias lub phaj muaj qhov nruab nrab ntawm kev sib cais los yog kev sib xyaw ua ke, cov vuam seam - uas khiav raws ntug ntawm phaj - tuaj yeem tau txais cov kev tsis zoo no. Qhov no yog vim li cas phaj rau B705 ntau lawm yuav tsum tau teev rau ASTM B168 (kev daws teeb meem-annealed thiab descaled) nrog ultrasonic kuaj ib ASME SA-435 los yog SA-577.
Vuam tsis: Thaum tshav kub kub input yuav tsum tau tswj. Cov yam ntxwv TIG rau 825 khiav 80-140 amps, 10-14 volts, ntawm kev mus ncig ceev ntawm 150-250 mm / min, yielding tshav kub inputs ntawm 0.8-1.5 kJ / mm. Cov khoom siv hluav taws xob ntau dua yuav ua rau HAZ grain coarsening; txo cov cua sov nkag yuav ua rau tsis tiav nkag mus rau ntawm phab ntsa hnyav dua.
Inner weld hlaws txias txias: Rau cov yeeb nkab uas tau npaj rau kev pabcuam corrosive, cov khoom siv sab hauv weld reinforcement (bead) yuav tsum tau tswj lossis tshem tawm. Internal hlaws scarification los yog flattening txo cov crevice geometry uas tuaj yeem ntxiab cov txheej txheem kua thiab pib hauv zos corrosion.
Tom qab -welding kev kho mob: N08825 tsis nruj me ntsis yuav tsum tau post-weld tov annealing (tsis zoo li, hais, 316L qhov twg cov tshuaj annealing yog qee zaum teev tom qab vuam rau kev pabcuam tseem ceeb). Txawm li cas los xij, rau cov yeeb nkab welded destined rau kev pabcuam hnyav, tag nrho cov tshuaj anneal ntawm 980℃yam tsawg kawg nkaus nrog cov cua txias ceev kom homogenizes microstructure thiab tshem tawm cov residual forming stresses. Ntau tus neeg yuav khoom nyob sab Europe qhia qhov no; Cov neeg siv khoom nruab nrab sab hnub tuaj feem ntau tsis yog qhov kev pabcuam tshwj xeeb yog qaub.
ERW vs EFW - Kev Tshaj Tawm Qhov Tseem Ceeb
Koj yuav pom ob nqe lus hauv cov lus hais thiab lawv tsis yog tib yam:
ERW (Electric Resistance Welded): Lub vuam yog tsim los ntawm kev tiv thaiv cua sov ntawm cov npoo thiab forging ua ke - tsis muaj hlau muab tub lim. Cov txheej txheem no yog ib txwm rau carbon steel thiab txheem stainless tab sis yogtsis yogFeem ntau siv rau N08825. Yog hais tias tus neeg muag khoom muab "ERW Incoloy 825," kho nws nrog ceev faj - alloy lub zog kub ua rau ERW impractical thiab cov txiaj ntsig zoo weld yog questionable.
EFW (Electric Fusion Welded): Nov yog TIG/SAW/combined txheej txheem piav saum toj no. ASTM B705 npog EFW yeeb nkab. Thaum cov neeg muag khoom hais tias "welded Incoloy 825 yeeb nkab"lawv txhais tau tias EFW rau B705. Nco ntsoov tias koj cov ntaub ntawv PO thiab cov ntaub ntawv tshuaj xyuas cuam tshuam txog qhov no.
Dimensional Capabilities: Qhov twg Welded thiab Seamless Diverge
Ib qho ntawm qhov sib txawv ntawm qhov ua tau zoo tshaj plaws - thiab ib qho uas cov kws tsim khoom lag luam saib xyuas kom txog thaum lawv tau daig - yog qhov loj ntawm txhua hom tuaj yeem them nyiaj txiag.
| Dimension | Seamless (B423) | Vuam (B705) |
|---|---|---|
| OD ntau | 1/8 "mus rau 8" (tseem), mus txog 12" (limited qhov chaw) | 2 "mus rau 30" + (tso los ntawm cov phaj muaj) |
| Phab ntsa thickness | Teem sijhawm 10S txog XXS; feem ntau capped ntawm ~ 25mm | 1.5mm txog ~ 40mm + nyob ntawm OD |
| Ntev | Txog li 6m random ntev tus qauv; 12m ua tau rau qhov ntau thiab tsawg | Txog li 12m + tus qauv; ntev nrog circumferential welds |
| Phab ntsa kam rau ua | ± 12.5% (STD), ± 10% (qib kub exchanger) | ± 0.5mm lossis ± 5% (ntau dua, vim phaj precision) |
| Ovality | Siab dua ntawm OD loj / nyias phab ntsa | Zoo dua - tsim los ntawm precision phaj |
| Concentricity | Zoo rau me me - nruab nrab loj; phab ntsa eccentricity nce nrog OD | Zoo heev - phab ntsa yog ib yam ntawm cov phaj |
Metallurgical thiab Performance Comparison
Corrosion Resistance: Puas yog Weld Matter?
Qhov no yog lo lus nug uas tsav tag nrho kev sib cav tswv yim tshwj xeeb. Cia peb ua tshwj xeeb.
General corrosion(kev tawm tsam tsis sib xws hauv sulfuric, phosphoric, lossis organic acids): Ua kom raugwelded N08825nrog ERNiFeCr-1 muab tub lim thiab tswj cov cua sov input ua qhov tseem ceeb zoo ib yam rau seamless niam txiv hlau. Lub vuam hlau chemistry yog sib npaug, thiab titanium stabilization tiv thaiv rhiab heev. General corrosion tus nqi nyob rau hauv 50% sulfuric acid ntawm 80℃- ib puag ncig tus neeg sawv cev rau chiv cog acid txias - qhia tsis muaj qhov sib txawv tseem ceeb ntawm cov qauv welded thiab seamless hauv kev sim kuaj.
Pitting thiab crevice corrosion: Qhov no yog qhov welded yeeb nkab tuaj yeem poob qab, tab sis tsuas yog nyob rau hauv cov xwm txheej tshwj xeeb. Lub HAZ ntawm TIG weld nyob rau hauv 825 muaj ib tug me ntsis txawv microstructure - cov nplej loj, muaj peev xwm rau localized titanium depletion ze ntawm fusion kab.
Hauv cov tshuaj chloride-cov kabmob ib puag ncig ntawm qhov kub siab tshaj 60 degree, qhov no tuaj yeem txhais tau qis dua qhov tseem ceeb pitting kub (CPT) hauv thaj tsam vuam piv rau cov niam txiv hlau. ASTM G48 Method A/C xeem feem ntau qhia CPT qhov tseem ceeb ntawm 25-35℃rau HAZ piv rau 35-45℃rau niam txiv hlau. Rau cov kev pab cuam uas qhov kev khiav hauj lwm kub mus txog lub alloy lub pitting txwv, qhov no 10℃sib txawv tseem ceeb.
Kev ntxhov siab corrosion cracking (SCC): N08825 tiv taus cov tshuaj chloride SCC txog li 200℃- zoo dua li 316L, phem tshaj 625. Cov welding residual stresses nyob rau hauv raws li -welded yeeb nkab yuav txo tau qhov pib no. Yog tias qhov kev pabcuam cuam tshuam nrog cov tshuaj chlorides ntawm qhov kub siab, tshuaj -annealed welded yeeb nkab (los yog seamless) yog qhov kev nyab xeeb dua.
Hydrogen-induced cracking (HIC) thiab sulfide stress cracking (SSC): Rau kev pabcuam qaub (H₂S{0}}muaj ib puag ncig), N08825 tau teev nyob rau hauv NACE MR0175 / ISO 15156 raws li tau txais mus rau qhov tshwj xeeb hardness txwv (HRC 35 nyob rau hauv annealed mob). Ob leeg seamless thiab welded yeeb nkab tuaj yeem ua tau raws li qhov no, tab sis cov yeeb nkab welded xav tau tias cov vuam thiab HAZ kuj dhau qhov kev sim hardness. Qee qhov Saudi Aramco thiab ADNOC cov txheej txheem pom zoo cov ntaub ntawv xav tau kev sim ntxiv ntawm thaj chaw vuam rau cov ntawv thov kev pabcuam qaub - npaj rau qhov no hauv koj cov peev nyiaj tshuaj xyuas.
Daim ntawv thov -Cov Lus Qhia Tshwj Xeeb Xaiv
Tsis yog daim ntawv pom zoo, ntawm no yog ib qho kev pabcuam - los ntawm - kev soj ntsuam kev pabcuam raws li kev ua haujlwm hauv kev lag luam thiab cov ntaub ntawv tsis ua haujlwm.
Thaum Seamless Yog Txoj Cai Hu
Cov roj ua kua qaub (H₂S> 50 ppm, kev pabcuam ntub dej): Lub HAZ ntawm welded N 08825 - txawm nrog titanium stabilization - sawv cev rau kev tsis sib xws ntawm metallurgical. Hauv kev pabcuam qaub, thaj chaw no yog qhov twg sulfide kev ntxhov siab tawg pib. NACE MR0175 tso cai welded N08825, tab sis cov tswv lag luam loj (Aramco, ADNOC, Petronas) ua haujlwm tsis zoo rau cov txheej txheem tseem ceeb hauv cov kev pabcuam qaub.
Thaum tshav kub kub exchanger raj (plhaub-thiab- raj, B163): Seamless yog qhov tseem ceeb yuav tsum tau ua. Kev sib xyaw ua ke ntawm cov phab ntsa nyias, qhov siab saum npoo - cheeb tsam- mus rau - ntim piv, thiab thermal cycling ua rau txoj kab ntev weld seam lub luag haujlwm. Welded heat exchanger tubes nyob rau hauv nickel alloys muaj tab sis raug txwv rau qis-siab, tsis yog- cov kev pabcuam tseem ceeb.
Subsea thiab txaws -zone piping: Qhov tshwm sim ntawm los ntawm - phab ntsa corrosion ntawm weld seam nyob rau hauv subsea ib puag ncig yog hnyav heev - nrhiav tau nyuaj thiab kho yog kim kim.Seamless N08825(los yog ntau dua alloy zoo li 625) yog kev coj ua.
Siab -kev pab kub siab tshaj 400 degree: Ntawm qhov kub siab, cov khoom nkag ntawm cov hlau vuam thiab HAZ diverge los ntawm niam txiv hlau. Rau kev ua haujlwm siab - qhov kub thiab txias, seamless zam qhov no ntev - lo lus nug kev ntseeg siab.
Cyclic/thermal fatigue service: Thermal cycling accentuates mechanical discontinuity at the weld. Cov chaw uas nquag pib- nres lub voj voog (piv txwv li cov nroj tsuag tshuaj lom neeg) tau txais txiaj ntsig los ntawm kev tsim kho seamless.
Thaum Welded Ua Siab
Loj - txoj kab uas hla txheej txheem piping (10"+) ntawm lub siab nruab nrab: Tus nqi nplua ntawm cov yeeb nkab seamless saum 10" yog qhov ntxhab, thiab cov phab ntsa tuab yuav tsum muaj rau kev ntim siab yog qhov tseem ceeb txaus uas cov vuam seam tus txheeb ze tsis muaj zog yog qhov tseem ceeb. Rau 16 "los yog 24" N08825 yeeb nkab nyob rau hauv qis - siab acid kab, welded B705 yog qhov kev xaiv zoo.
Tsis yog -cov kav dej tseem ceeb: Cov dej txias, cov kav dej, thiab cov tshuab ua pa hauv cov hlau 825 (tseem ceeb rau kev tiv thaiv corrosion es tsis txhob muaj siab) yog cov neeg sib tw zoo tshaj plaws rau cov yeeb nkab welded. Cov kev pabcuam tsis ua rau tus nqi seamless.
Cov phiaj xwm nyiaj txiag nrog kev tswj tus nqi nruj: Rau EPC tej yaam num uas txhua duas las ntawm cov khoom siv raug tshuaj xyuas, hloov welded rau seamless ntawm tsis yog - cov kab tseem ceeb yog ib qho ntawm ob peb tus nqi tsim nyog engineering txav muaj nyob rau hauv nickel alloy piping. Cov nroj tsuag phosphoric acid ib txwm siv tau 40-60 tons ntawm N08825 piping - hloov 60% ntawm qhov ntawd los ntawm seamless rau welded txuag $ 150,000-200,000 hauv cov khoom siv thauj khoom.
Tight phab ntsa kam rau ua: Thaum lub sij hawm ntsuas qhov tseeb qhov teeb meem (meter khiav, lub siab tseem ceeb-tej seem), welded yeeb nkab lub superior phab ntsa uniformity yuav ua tau zoo dua seamless.
Ntev ua ntej - lub sijhawm: Welded N08825 yeeb nkabfeem ntau muaj luv luv sij hawm ua txhuas (4-8 lub lis piam vs . 8-16 lub lis piam rau seamless) vim muaj ntau dua zeb. Rau kev kho thaum muaj xwm txheej ceev lossis cov phiaj xwm nrawm, qhov no tuaj yeem yog qhov kev txiav txim siab.
Rau quotations rauIncoloy 825 welded yeeb nkab(ASTM B705) thiab seamless yeeb nkab (ASTM B423) nrog tag nrho EN 10204 3.1/3.2 ntawv pov thawj, PMI pov thawj, thiab kev txhawb nqa hauv cheeb tsam rau Middle East, European, thiab Asian lag luam, hu rau HUITONG pab pawg muag khoom. Peb tuav cov khoom lag luam ntawm N08825 qhov ntau thiab tsawg thiab tuaj yeem npaj cov khoom tsis yog - qhov ntev nrog cov ntaub ntawv zoo.
