Khoom siv

800H tsis tuaj yeem corroded hauv ntau hom xov xwm. Nws cov ntsiab lus npib tsib xee ntau dua ua rau nws muaj kev ntxhov siab zoo corrosion tsis kam tawg hauv cov dej corrosion. Cov ntsiab lus siab chromium ua rau nws zoo dua rau pitting thiab crevice corrosion cracking. Cov hlau no tuaj yeem tiv taus nitric acid thiab organic acid, tab sis nws tsis zoo nyob rau hauv sulfuric acid thiab hydrochloric acid.
800H muaj corrosion kuj zoo rau ob qho tib si oxidation thiab tsis-oxidizing ntsev, tab sis tej zaum me ntsis pitting nyob rau hauv halide, thiab kuj zoo heev zog nyob rau hauv sib tov ntawm dej, pa luam yeeb, chav, cua thiab carbon dioxide.

Qhov sib ntxiv ntawm molybdenum thiab chromium rau nws cov alloys ua kom cov khoom siv zoo dua qub thiab qee qhov kev tiv thaiv corrosion. ASTM A182 F22 Class 3 flanges muaj qhov zoo atmospheric corrosion kuj thiab qee qhov tsis kam mus rau qhov ntsuas thaum lawv raug kub. Qhov sib ntxiv ntawm molybdenum rau alloys feem ntau yog txuam nrog siab tawv thiab hardness. Yog li ntawd, thaum muaj nyob rau hauv cov tshuaj muaj pes tsawg leeg ntawm Astm A182 F22 Chav Kawm 1 WNRF Flanges, nws toughness muab cov hlau zoo dua li cov pa roj carbon steel qib.

ASTM A182 yog tus qauv Specification rau Forged lossis Rolled Alloy Steel Yeeb Nkab ASTM A182 F11 Flanges, Forged Fittings, thiab Li qub thiab qhov chaw. Cov hlau alloy hlau A182 qib F11 WNRF flanges yog tsim los rau kev siv kub.

Cov tshuaj sib npaug tso cai rau cov hlau ua kom pom kev zoo heev rau carburization, oxidation thiab nitriding atmospheres. 800HT yuav tsis dhau los ua embritted txawm tias tom qab siv sijhawm ntev hauv 1200-1600 deg F ntau qhov uas ntau cov hlau tsis xeb ua nkig. Cov yam ntxwv txias txias zoo heev feem ntau cuam tshuam nrog cov nickel-chromium alloys tau nthuav tawm nrog 800HT. Thaum txias tsim ntau qhov loj me ua rau pom qhov tsis pom kev zoo hu ua "txiv kab ntxwv tev". 800HT tuaj yeem welded los ntawm cov txheej txheem siv los ntawm cov hlau tsis muaj steel.

A105 Flanges yog qhov zoo li lub disc, uas yog feem ntau nyob rau hauv pipeline engineering. Flanges yog siv nyob rau hauv khub thiab txuam nrog lawv ntawm li qub. Hauv pipeline engineering, flanges feem ntau yog siv rau kev sib txuas ntawm cov kav dej. Hauv cov kav dej uas xav tau kev sib txuas, flanges tuaj yeem ntsia tau rau ntau txoj hauv kev. Hlau txuas flanges tuaj yeem siv rau cov kav dej uas tsis tshua muaj siab, thiab vuam flanges tuaj yeem siv rau qhov siab tshaj 4 kg. Ntxiv ib lub tshuab ntxhua khaub ncaws ntawm ob lub flanges, tom qab ntawd nruj nrog cov bolts.

ASTM A182 F5 flanges yog ua los ntawm chrome-molybdenum hlau alloy thiab yog li ntawd muaj kev puas tsuaj siab. Lawv qhov hnyav qis kuj tseem nyiam vim lawv cov pa roj carbon tsawg thiab cov khoom siv siab alloy. Nws yog heev resistant rau sulfide corrosion cracking thiab tuaj yeem tiv thaiv kev tawm tsam ntawm hydrogen.

Inconel Alloy 600 tubing yog tsim los ntawm cov hlau tsis sib nqus, nickel-chromium alloy paub txog nws qhov zoo oxidation tsis kam ntawm qhov kub thiab txias. Qhov tseeb, Inconel Alloy 600 (UNS N06600) tau tsim los rau kev siv los ntawm cryogenic mus rau qhov kub thiab txias mus txog 2000 degrees F. Inconel Alloy 600 tubing muaj cov khoom siv zoo heev, kev sib xyaw ua ke ntawm lub zog siab nrog kev ua haujlwm zoo, thiab yog weldable yam tsis muaj teeb meem. Inconel? Alloy 600 tsis yog precipitative hardenable, nws yog hardened thiab ntxiv dag zog los ntawm kev ua hauj lwm txias.

A182 yog dov lossis forged alloy flange specification rau cov kev pabcuam siab thiab tshuab. Peb muab F11 alloy steel flanges nrog cov ntsiab lus carbon txog li 3%, uas muab flanges chav los txhim kho lawv cov weldability thiab formability, thaum tseem ua rau lawv tag nrho lub zog.

Incoloy 800H muaj qhov txwv cov ntsiab lus ntawm 0.05 txog 0.10%, uas yog nyob rau sab sauv ntawm Incoloy 800, thiab yog annealed ntawm 1149 txog 1177oC (Incoloy 800 yog annealed ntawm 983 txog 1038oC). Cov kev sib txawv no qhia nws kom muaj kev ntxhov siab ntau dua thiab muaj zog dua li Incoloy 800.

800H tsis tuaj yeem corroded hauv ntau hom xov xwm. Nws cov ntsiab lus siab nickel ua rau nws muaj kev ntxhov siab zoo corrosion tsis kam tawg hauv cov dej corrosion. Cov ntsiab lus siab Chromium ua rau nws tuaj yeem tiv taus pitting thiab crevice corrosion cracking. Cov hlau no tuaj yeem tiv taus nitric acid thiab organic acid corrosion, tab sis nws tsis zoo nyob rau hauv sulfuric acid thiab hydrochloric acid.

Alloy 800 - Lub 800 series ntawm alloy (Incoloy 800, 800H thiab 800HT) yog npib tsib xee-hlau-chromium superalloys uas muaj cov khoom zoo heev ntawm qhov kub thiab txias zog thiab tiv thaiv oxidation, carburization thiab lwm yam kub kub corrosion. Alloy 800, 800H thiab 800HT yog siv nyob rau hauv ntau yam kev siv los ntawm cov khoom siv rauv, petrochemical furnace cracker hlab rau sheathing rau hluav taws xob cua sov ntsiab.

Flanges yog ib feem tseem ceeb ntawm cov txheej txheem kev lag luam. Feem ntau cov kev lag luam, suav nrog roj thiab roj, kev kho dej, thiab tsim hluav taws xob nuclear, siv cov kav dej uas tso cai rau cov xov xwm ntws ntawm cov nroj tsuag sib txawv. Cheebtsam xws li fittings thiab carbon steel SA105 yeeb nkab flanges pab tswj cov ndlwg ntawm hais xov xwm.

Carbon steel yog cov hlau uas lub ntsiab alloying yog carbon. Cov hlau yog suav tias yog carbon hlau thaum tsis muaj qhov yuav tsum tau tsawg kawg nkaus rau chromium, cobalt, molybdenum, npib tsib xee, titanium, tungsten lossis lwm yam alloying. Cov pa roj carbon steel tuaj yeem ua kom tawv thiab muaj zog dua los ntawm kev kho cua sov. Cov kev ntsuas hardness thiab lub zog yog txiav txim siab los ntawm cov ntsiab lus carbon - qhov siab dua cov ntsiab lus carbon, qhov nyuaj thiab muaj zog ntawm cov hlau yuav yog.

Super alloys kuj raug xa mus rau kev ua haujlwm siab alloys. Lawv muaj kev nkag siab zoo thiab oxidation tsis kam, thiab siv qhov chaw siab ruaj khov yuav tsum tau ua. Lawv kuj muaj peev xwm ua haujlwm nyob rau hauv qhov kub thiab txias thiab mechanical stress. Lawv tuaj yeem ua kom muaj zog los ntawm kev daws teeb meem hardening, ua haujlwm hardening, thiab nag lossis daus hardening. Lawv muab faib ua peb pawg xws li hlau-based, nickel-based, thiab cobalt-based alloys.

A-694 qib, F42 txog F70 (rau cov ntawv thov ntim siab). Vim yog lub zog zoo tshaj ntawm cov khoom siv no, koj yuav pom cov khoom siv siab siv dav hauv cov kav dej. Alloy steel forgings muaj cov ntsiab lus chromium thiab molybdenum ntau dua li cov qauv carbon steel forgings thiab yog tsim los rau kev kub siab (tshaj 1000 * F), kev pabcuam siab. Lawv kuj muaj kev tiv thaiv corrosion ntau dua li cov qauv carbon steel forgings vim lawv cov ntsiab lus chromium ntau dua.

ASTM A105 npog forged carbon steel flanges thiab piping Cheebtsam rau ambient thiab kub kev pab cuam nyob rau hauv siab systems. Nws kuj suav nrog fittings, li qub thiab cov khoom zoo sib xws. Qhov hnyav tshaj plaws ntawm kev tsim forgings uas tus qauv no ua raws yog 10,000 lub voj voog (4,540kg). Loj forgings tuaj yeem ua raws li Standard A 266\ / A266M. Qhov kev qhia tshwj xeeb no tsis npog cov nplooj ntawv raj thiab hollow cylindrical forgings rau cov hlab ntsha siab.

Cov hlau me me, nws yog hom carbon hlau. Carbon yog tam sim no nyob rau hauv tag nrho cov hlau thiab thaum carbon yog lub ntsiab alloying caij nyob rau hauv steel nws yog hu ua carbon steel. Ntawm qhov tod tes, tus nqi ntawm cov pa roj carbon tam sim no hauv cov hlau txiav txim siab hom lossis qib ntawm carbon steel. Cov hlau me me muaj cov ntsiab lus qis tshaj plaws ntawm cov hlau, tab sis qhov ntawd tsis ua rau nws tsis tshua muaj txiaj ntsig. Qhov tseeb, cov hlau me me yog cov qib steel feem ntau siv, suav txog 85% ntawm tag nrho US steel ntau lawm.

Feem ntau hais lus, cov ntsiab lus tsis muaj cov pa roj carbon steel yeeb nkab flanges yog qis dua li ntawm cov flanges molten. Lawv tsis oxidize sai heev. Lawv yog cov tiaj tus thiab haum lub teeb hauv kev tsim kho, thiab cov fused flanges muaj cov cuab yeej zoo heev. Txoj kev forging tsis raug feem ntau ua rau cov nplej dav lossis tsis xwm yeem; hardening tawg thiab forging yog siab tshaj cam khwb cia flanges.

Ntawm qhov kub no, duplex steel flanges tshaj 300 degrees Celsius tseem tiv thaiv los ntawm embrittlement vim corrosion. Cov kav dej muaj peev xwm kuj zoo heev ntawm qhov kub thiab txias. Fabrication tsuas yog ua nrog cov cuab yeej muab rau cov ntaub ntawv stainless hlau. Yuav tsum tau ntxuav kom zoo ua ntej siv. Qhov no yog ua los tiv thaiv cov hlau tsis huv los ntawm kev sib kis ntawm cov hlau corroding.

Cov ntawv thov rau cov hlau muaj xws li ethylene pyrolysis, hydrocarbon cracking, tawg rau cov vinyl chloride, diphenol thiab acetic acid. Cov hlau tseem siv tau rau cov li qub, fittings thiab lwm yam khoom uas raug corrosive nres los ntawm 1100 txog 1800 deg F.

Round bar li ntawm 3\/4 "mus rau 6" txoj kab uas hla, thiab lub teeb gauge ntawv thiab phaj. Incoloy 800 H cov ntaub ntawv tuaj yeem muab nkag rau hauv qhov ntev, txiav kom txiav lossis tshuab rau cov neeg siv khoom. Machining muaj xws li drilling, threading, milling, CNC duab, tig, tapping, flanges thiab lwm yam.

Tsis tas li ntawd, cov khoom siv hlau ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev siv dej hiav txwv, suav nrog kev ywj pheej los ntawm kev tawm tsam hauv zos (pitting thiab crevice corrosion), siab corrosion-nqus zog, siab tensile zog, thiab tsis kam mus rau chloride-ion kev nyuaj siab-corrosion tawg.

Peb muab ASTM A182 F11 ntev taub qab weld flanges nrog niobium thiab titanium ntxiv rau cov mining, kev tsim kho, kev tsheb nqaj hlau thiab aerospace kev lag luam rau rhiab heev thiab lub zog siab tshaj plaws. Peb nyob ze saib xyuas kev lag luam tiam sis thiab xav tau los tsim cov khoom tshiab, ruaj khov thiab kev lag luam uas tuaj yeem hloov kho. Peb cov khoom muaj ntawv pov thawj thiab 100% ruaj khov.

Butt weld flanges feem ntau yog siv rau hauv cov ntawv thov uas muaj kev kub ntxhov siab. Lub puab txoj kab uas hla ntawm flange yog tsim los kom phim lub puab txoj kab uas hla ntawm cov yeeb nkab. Butt weld yeeb nkab flanges nrog hubs muaj nyob rau hauv qhov ntau thiab tsawg los ntawm 1\/2 "mus rau 96". Peb lub tuam txhab tsim cov pob tw weld flanges hauv txhua cov khoom siv qib, qhov ntau thiab tsawg.

F11 flanges yog ua los ntawm cov khoom siv zoo raw khoom kom ua tau zoo txawm tias nyob rau hauv qhov chaw hnyav tshaj plaws. Lub rooj hnyav no kuj muaj thiab cov khoom tsim los ntawm nws. Alloy steel F11 flange specification, lub ntsej muag hom pib ntawm lub ntsej muag tiaj tus, tsa lub ntsej muag, lub nplhaib sib koom, thiab lwm yam. Cov no yog siv rau hauv cov ntawv thov uas yuav tsum tau muaj kev tiv thaiv me ntsis thiab kev tiv thaiv corrosion.

Qib F22 yog qib qis alloy steel nrog cov ntsiab lus chromium ntawm 2% thiab 2.5%. Cov ntsiab lus ntawm chromium thiab molybdenum yog ob zaug ntawm qib F11. Txawm li cas los xij, vim tias cov ntsiab lus siab tshaj plaws ntawm tag nrho cov ntsiab lus alloying txog li 5%, nws raug cais raws li qib qis alloy steel. Raws li qib qis alloy steel, ASTM A182 F22 flanges ua tau zoo dua cov pa roj carbon steel, tshwj xeeb tshaj yog hauv cov ntawv thov uas muaj qhov kub thiab txias.

Alloy 625 feem ntau yog muab nyob rau hauv qhov mob annealed, los muab kev ruaj ntseg zoo tshaj plaws thaum tsim khoom thiab kev pabcuam tom qab. INCONEL 625 alloy tau pom tias muaj kev tiv thaiv rau cov khoom siv hluav taws xob thiab cov ntsev lossis dej tsis huv, qhov twg Chloride ions ua rau pitting thiab crevice corrosion los ua. Raws li qhov tshwm sim, cov kav dej sib sau ua ke cov roj qaub tau tsim nrog cov khoom (los yog clad) INCONEL 625 alloy thiab siv hauv seawater heat exchangers hauv refineries, fais fab nroj tsuag, thiab offshore topside cov kev pab cuam uas feem ntau xav tau cov khoom no.

Vim tias lawv tau tsim raws li qhov tshwj xeeb ASTM A182, lawv yuav tsum ua kom tau raws li qee qhov kev xav tau, xws li cov khoom muaj zog thiab tensile zog. Lwm yam khoom siv uas xav tau rau Sa182 F22 threaded flanges suav nrog Brinell hardness thiab elongation sib npaug. Txhawm rau txhim kho cov khoom ntawm cov hlau, cov khoom no yuav tsum tau ua raws li txheej txheem kev kho cua sov ua ntej. Cov yam yuav tsum tau ua ua ntej no suav nrog hom kev kho cua sov siv rau ntawm Astm A182 F22 alloy steel flange thiab qhov kub ntawm qhov nws yuav ua. Thaum lub sij hawm kho cua sov, ntxiv rau cov txheej txheem quenching yuav tsum tau nqa tawm, lwm yam yuav tsum tau ua ua ntej muaj xws li qhov nruab nrab uas yuav tsum tau ua kom txias ntawm lub flange Astm A182 F22.

SS 347 flanges yog siv nyob rau hauv qhov kub thiab txias txias thiab kub thiab hnav thiab tsim kua muag.

Alloy steel A182 F5 qib WNRF flanges muaj welded caj dab ntxiv zog thiab tuav. Cov no tuaj yeem siv nyob rau hauv cov pa roj siab thiab cov kua dej ntws raws li lawv cov ntaub ntawv pov thawj. Lawv kuj tuaj yeem siv rau ntawm qhov kub thiab txias heev, vim tias lub caj dab welded tuaj yeem txo qhov xau. Nce lub ntsej muag muab tuav zoo rau bolting los yog vuam.