Flange Cov Khoom Siv Khoom Siv Xaiv rau Cov Roj & Roj Kev Lag Luam
Flanges yog cov cheebtsam tseem ceeb hauv cov roj thiab roj kev lag luam, siv rau kev tuaj koom cov kav dej, li qub, thiab lwm yam khoom siv. Muab cov kev lag luam hnyav thiab xav tau cov xwm txheej ntawm kev lag luam, suav nrog cov tshuaj tsis zoo, thiab cov khoom siv tsis yooj yim, cov khoom sib cav sib txawv yog qhov tseem ceeb rau kev ncaj ncees thiab kev nyab xeeb ntawm cov piping tshuab. Ntawm no yog cov phau ntawv qhia dav dav los pab koj xaiv cov khoom siv flange flange rau cov roj av sib txawv thiab roj.
Qhov tseem ceeb los xav txog hauv cov khoom xaiv
Corrosion Kuj
Cov roj thiab roj kev lag luam feem ntau koom nrog cov tshuaj uas xeb, nrog cov roj uas nyoos, cov roj av, kua qaub, thiab hichs (hydrogen sulfide). Cov khoom siv nrog cov kev ua haujlwm siab yuav txuas ntxiv cov kev pabcuam lub neej ntawm Flanges thiab txo qis kev pheej hmoo ntawm txeej thiab ua tsis tiav.
Kub tiv thaiv
Flanges siv nyob rau hauv cov roj thiab roj sector yuav tsum wawict kub, los ntawm cov chaw subzero hauv ntug dej ntug dej rau cov haujlwm kub siab. Cov khoom siv yuav tsum muaj kev tswj hwm nws lub zog thiab yoog raws li cov kub no.
Siab tiv tsis tau
Ntau daim ntawv thov, xws li cov xa xov siab zoo thiab xav tau cov Flanges uas tuaj yeem tiv taus ntau qhov chaw siab. Cov ntaub ntawv yuav tsum muaj cov tensile siab thiab tawm los ua lub zog ua kom muaj kev ncaj ncees hauv cov xwm txheej no.
Cov Khoom Siv Neeg Kho Tshuab
Cov khoom siv flange yuav tsum muaj lub zog zoo dua qub, nrog rau lub zog tensile, tawm tsam lub zog, thiab kev ntxhov siab lossis kev ntxhov siab.
Qeeb zog tsis kam
Flanges nyob rau hauv cov roj thiab roj kev lag luam feem ntau raug thauj khoom siv zog siv, vibrations, thiab thermal cycling, yog li nkees cycling, yog li nkees cycling yog qhov tseem ceeb tshaj plaws yog qhov tseem ceeb tshaj plaws.
Cov Khoom Siv Nrov Khoom Siv Rau Cov Roj & Roj
1. Cov hlau roj (ASTM A105, ASTM A350 LF2)
Khoom:
Corrosion Kuj: Muaj pes tsawg; Ntau raug rau xeb thiab xeb, tshwj xeeb tshaj yog nyob rau hauv acidic ib puag ncig.
Cov Khoom Siv Neeg Kho Tshuab: Muaj lub zog siab, kev nruj me ntsis, thiab ductility.
Kub tiv thaiv: Tuaj yeem tiv taus kub txog 800 degree f (427 degree).
Tus nqi: Tus nqi qis dua piv rau cov hlau thiab stainless.
Cov Ntawv Thov:
Dav siv nyob rau hauv cov ntawv thov tsawg rau kev siv hluav taws xob me me.
Haum rau pipelines, flanges, thiab li qub nyob rau hauv tsis-corrosive ib puag ncig.
Feem ntau siv nyob rau hauv kev thauj mus los ntawm roj, ntuj nkev, thiab lwm yam hydrocarbons nyob qhov twg corrosion tsis yog qhov kev txhawj xeeb tseem ceeb.
Pros:
Raug nqi zoo.
Muaj zog thiab ruaj khov nyob hauv ntau daim ntawv thov.
Cons:
Raug rau kev ua xeb hauv cov chaw hnyav ib puag ncig, xws li dej hiav txwv lossis acidic gases (h2s).
2. Stainless Hlau (304, 316, 904L)
Khoom:
Corrosion Kuj: Zoo heev rau kev corrosion, tshwj xeeb tshaj yog nyob rau hauv seawater, acidic ib puag ncig, thiab chloride-nplua nuj.
Cov Khoom Siv Neeg Kho Tshuab: High tensile lub zog, ua qauv zoo nkauj, thiab cov tsis kam rau pitting thiab crevice corrosion.
Kub tiv thaiv: Zoo ntawm qhov kub txog li 1500 degree f (815 degree).
Tus nqi: Tus nqi ntau dua li cov hlau steel tab sis muaj lub neej pabcuam ntev dua.
Cov Ntawv Thov:
Offshore roj thiab roj platform.
Rov ua kom zoo nkauj thiab tshuaj lom ua cov nroj tsuag.
Cov kav dej thiab cov cuab yeej siv cov ntsev thiab acidic ib puag ncig.
Pros:
Zoo heev corrosion.
Ua tau zoo hauv ob qho kub-kub thiab cov chaw siab siab.
Cons:
Kim kim dua cov roj carbon hlau.
Muaj peev xwm ua tau zoo rau kev ntxhov siab corrosion tawg hauv qee qhov xwm txheej (piv txwv li, cov chloride ib puag ncig).
3. Duplex Stainless Hlau (2205, 2507)
Khoom:
Corrosion Kuj: Zoo tsis kam rau pitting, crevice corrosion, thiab kev nyuaj siab corrosion tawg, tshwj xeeb tshaj yog hauv chloride ib puag ncig.
Cov Khoom Siv Neeg Kho Tshuab: Lub zog siab dua li cov pa roj tsis huv. Zoo dua tsis kam rau qaug zog thiab tawg.
Kub tiv thaiv: Haum rau kev muaj mob rau qhov kub thiab txias, txog 1100 degree f (593 degree).
Tus nqi: Kim dua li cov qauv stainless hlau.
Cov Ntawv Thov:
Offshore roj rigs thiab cov ntawv thov tom qab.
Kev ua yeeb yam thiab ua kom zoo dua qhov twg cov ntaub pua av tshuaj pleev qhov chaw yog qhov tseem ceeb.
Kev siab siab thiab cov neeg nyiam-salinity.
Pros:
Zoo heev corrosion tsis kam nyob rau hauv chloride-nplua nuj thiab sour ib puag ncig.
Lub zog siab dua, txo qhov xav tau ntawm cov ntaub ntawv tuab.
Cons:
Kim kim tshaj li cov hlwv huv.
Yuav tsum muaj kev tswj kom meej thaum lub sij hawm vuam kom tsis txhob muaj kev tawm tsam.
4. Alloy Steel (Inconel 625, Incoloy 800, Hastelloy C276)
Khoom:
Corrosion Kuj: Super super tsis kam rau cov high-kub oxidation, pitting, thiab corrosion hauv kev tawm tswv yim (piv txwv li, Sulphur).
Cov Khoom Siv Neeg Kho Tshuab: Lub zog siab, zoo heev thermal stability, thiab kev tawm tsam rau thermal cycling thiab nkag.
Kub tiv thaiv: Muaj peev xwm tiv taus kub siab heev, txog 1800 degree f (982 degree) rau inconel.
Tus nqi: Cov nqi siab vim yog lub npe sib xyaw.
Cov Ntawv Thov:
Kev siv hluav taws xob siab, muaj kev kub siab xws li xws li cov khoom siv hluav taws xob ua kom tawg, roj av.
Cov cuab yeej siv tau tshwm sim los ntawm sulfuric acid, chlorides, thiab lwm yam tshuaj corrosive.
Pros:
Tshwj xeeb kev kub thiab corrosion tsis kam.
Qhov zoo tshaj plaws rau kev siv tshuaj lom neeg thiab qhov dej kub.
Cons:
Kim piv rau cov hlau thiab hlau stainless.
Yuav tsum xav tau cov txuj ci vuam thiab kev txawj ntse.
5. Monel (400)
Khoom:
Corrosion Kuj: Kev zam tsis kam mus rau dej hiav txwv, acids, thiab alkalis.
Cov Khoom Siv Neeg Kho Tshuab: Muaj lub zog siab thiab tawv tawv, txawm tias ntawm sub-xoom kub.
Kub tiv thaiv: Muaj txiaj ntsig txog 1000 degree f (537 degree).
Tus nqi: Cov nqi siab vim yog cov khoom siv npib tsib xee.
Cov Ntawv Thov:
Cov ntawv thov marine, suav nrog ReneHore roj platforms thiab subseea.
Tshuaj lom neeg ua haujlwm thiab cov cuab yeej siv tau rau acidic gases, zoo li H2s, thiab dej hiav txwv.
Pros:
Zoo heev rau corrosion nyob rau hauv seawater thiab brines.
Zoo weldability thiab formability.
Cons:
Tus nqi siab.
Feem ntau siv hauv cov roj thiab roj ntxiv vim muaj nqi.
Cov khoom sib piv rooj rau cov roj & roj cov ntawv thov
| Khoom | Corrosion Kuj | Kub tiv thaiv | Lub zog | Cov Ntawv Thov | Tus nqi |
|---|---|---|---|---|---|
| Cov Hlau Hlau | Kev sib tw (xeb hauv kev tawm tsam) | Txog li 800 degree f (427 degree) | Muaj zog thiab muaj sia | Pipelines, li qub nyob rau hauv tsis-corrosive ib puag ncig | Qi |
| Stainless hlau | Zoo heev (tshwj xeeb yog 316, 904L) | Txog li 1500 degree f (815 degree) | Siab Zog Thiab Deev | Offshore, kev ua yeeb yam, ua kom zoo | Mob siab rau siab |
| DupleX ss | Muaj Koj Ntiag (Resistant rau Chlorides) | Txog li 1100 degree f (593 degree) | Siab dua lub zog tshaj li ustenitic ss | Offshore, subsea, cov nroj tsuag tshuaj lom neeg | Siab |
| Alloy Steel | Superior (inconel, hastelloy) | Txog 1800 degree f (982 degree) | High tensile lub zog | High-temp, cov chaw siab siab ib puag ncig | Siab heev |
| Tus mlom | Tshwj Xeeb (Seasaterater, acids) | Txog li 1000 degree f (537 degree) | Siab heev | Offshore, marine, kev ua yeeb yam | Siab heev |
Tag
Xaiv cov khoom siv flange flange rau cov roj thiab roj kev lag luam nyob ntawm ntau yam, suav nrog rau cov xov xwm corrosive, ntsuas kub, thiab kev ntxhov siab.Cov Hlau Hlauyog qhov zoo tshaj rau qis rau kev siv cov kev siv horrerate, thaumStainless hlauthiabDuplex Stainless Hlauzoo dua haum rau cov chaw ib puag ncig uas raug rau chlorides thiab acids. Rau qhov kev sib tw hnyav tshaj plaws nrog cov kev sib tw kub siab lossis ntshav nyuaj,Alloy Steels(piv txwv li, inconel, hastelloy) thiabTus mlomyog cov kev xaiv zoo tshaj plaws. Nco ntsoov xyuas kom cov khoom raug xaiv ua raws li cov kev xav tau ntawm daim ntawv thov los lav kev ua haujlwm ntev, kev nyab xeeb, thiab tus nqi-ua hauj lwm zoo.
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