Dab tsi yog hom hom Hastelloy C flanges muaj, thiab lawv tau faib li cas los ntawm kev ntsuas siab?

1. Hom thiab Kev Ntsuas Siab

Q: Dab tsi yog cov hom Hastelloy C flanges muaj, thiab lawv muab faib li cas los ntawm kev ntsuas siab?

A: Hastelloy C flanges yog tsim nyob rau hauv ntau yam kev teeb tsa kom haum cov kav dej sib txawv, txhua tus tsim los rau cov kev sib txuas tshwj xeeb thiab cov kev mob siab.

Common Flange Hom:

Weld Neck Flange: Nta ntev, tapered hub uas muab kev txhawb zog thiab faib kev ntxhov siab. Lub bore sib phim cov yeeb nkab hauv txoj kab uas hla, tso cai rau cov ntws ntws thiab txo qhov turbulence. Zoo tagnrho rau kev pabcuam hnyav thiab kev thauj khoom cyclic.

Slip- Ntawm Flange: Swb hla cov yeeb nkab thiab yog welded ob sab hauv thiab sab nraud. Tus nqi qis dua lub caj dab weld tab sis muaj zog tsawg dua thiab qaug zog ua haujlwm. Haum rau kev thov tsawg dua.

Qhov muag tsis pom Flange: Cov khoom flange uas tsis muaj qhov tho, siv los kaw cov yeeb nkab kawg, li qub, lossis lub siab lub nkoj qhib. Yuav tsum tiv taus qhov siab tshaj plaws ntawm lub cev thiab txhua qhov thermal expansion rog.

Socket Weld Flange: Cov yeeb nkab ntxig rau hauv lub qhov (socket) recessed thiab yog fillet welded. Siv rau cov yeeb nkab me me (feem ntau NPS 2 thiab qis dua) thiab siab - cov tshuab siab.

Lap Joint Flange: Siv nrog lub qhov kawg; lub flange rotates dawb do, cia yooj yim alignment ntawm bolt qhov. Zoo tagnrho rau cov tshuab uas yuav tsum tau nquag disassembly.

Threaded Flange: Txuas rau cov yeeb nkab ntawm cov xov tsis muaj vuam. Siv nyob rau hauv uas tsis yog - tseem ceeb, qis - lub tshuab siab lossis qhov chaw vuam tsis zoo.

Kev faib tawm siab:

Hastelloy C flanges ua raws li ASME B16.5 cov qauv qauv nrog cov chav kawm siab xws li Chav Kawm 150 txog Chav Kawm 2500:

Cov Khoom Zoo: Hastelloy C lub zog siab tso cai rau cov flanges kom ua tiav cov kev ntsuas siab no thaum tswj kev tiv thaiv corrosion zoo heev, tsis zoo li cov pa roj carbon steel flanges uas yuav tsum muaj kev tiv thaiv corrosion los yog hauv ob sab phlu.

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2. Lub ntsej muag Finishes thiab Gasket Sealing

Q: Yuav ua li cas lub ntsej muag tiav hom ntawm Hastelloy C flanges cuam tshuam kev ua tau zoo sealing, thiab cov kev ua tiav twg tau pom zoo rau kev pabcuam corrosive?

A: Lub ntsej muag flange ua tiav yog qhov tseem ceeb rau kev ua tiav qhov xau- nruj seal, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig corrosive qhov twg txawm tias me me tuaj yeem ua rau kev sib koom ua ke sai.

Lub ntsej muag Finish Hom rau ASME B16.5:

Smooth Finish (125-250 microinch Ra): Txheem tiav rau feem ntau daim ntawv thov. Haum rau cov mos mos gaskets (elastomeric, PTFE, compressed fiber) uas ntws mus rau saum npoo irregularities.

Serrated Finish (Concentric los yog Kauv): Muaj cov cuab yeej tswj xyuas uas tsim cov kev sib khi. Qhov feem ntau tiav rau tsa lub ntsej muag flanges hauv kev pabcuam tshuaj. Serrations feem ntau 30-55 grooves ib nti nrog 0.015-nti tob.

Stock Finish (Rough, >250 Ra): Raws li - tsim nto yam tsis muaj machining. Feem ntau tsis tsim nyog rau cov kev pabcuam tseem ceeb vim nws yuav tsum tau tuab heev, deformable gaskets.

Phonographic Finish: Cov qauv zoo nkauj zawv zawg uas muab kev tuav zoo rau cov hlau thiab ib nrab -metallic gaskets. Txaus siab rau siab - siab thiab siab - cov ntawv thov kub.

Cov lus pom zoo rau Hastelloy C Flanges:

Raised ntsej muag (RF): Feem ntau ntsib rau Hastelloy C flanges. Qhov saum npoo (feem ntau 1/16 nti siab rau Chav Kawm 150-300, 1/4 nti rau Chav Kawm 400-2500) concentrates bolt load ntawm lub gasket.

Nplhaib-Type Joint (RTJ): Rau siab heev- kev pabcuam siab lossis kev phom sij, RTJ grooves machined rau hauv Hastelloy C flanges txais cov gaskets hlau (oval lossis octagonal). Lub gasket deforms rau hauv cov phab ntsa zawj, tsim cov hlau- rau- hlau foob uas tiv taus qhov kub thiab txias.

Lub ntsej muag tiaj tus (FF): Siv nrog lub tiaj- ntsej muag cam khwb cia hlau los yog tsis yog-hlau flanges los tiv thaiv kev tawg ntawm ntsia liaj qhov rooj hla- torque. Tsis raug rau Hastelloy C tshwj tsis yog kev sib tw rau cov khoom sib txawv.

Gasket xaiv kev txiav txim siab:

Lub ntsej muag flange tiav yuav tsum phim lub gasket hom:

PTFE/Gore-Tex®: Yuav tsum tau ua kom tiav (125-250 Ra) kom tsis txhob txias ntws mus rau hauv serrations

Spiral Wound: Ua tau zoo tshaj plaws nrog serrated tiav (125-250 Ra nrog 30-55 grooves)

Hlau Jacketed: Yuav tsum tau ua kom tiav kom haum rau qhov chaw zaum

Lub nplhaib sib koom: Cov zawj tshwj xeeb ua tiav ib ASME B16.20

Kev txiav txim siab Corrosion: Hauv kev pabcuam nruj, lub flange ntsej muag nws tus kheej tuaj yeem raug rau cov txheej txheem xov xwm. Hastelloy C's corrosion kuj ua kom lub sealing nto tsis zoo, tiv thaiv kev xau los ntawm kev txhim kho lub sijhawm.

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3. Bolting thiab Torque Requirement

Q: Dab tsi bolting cov ntaub ntawv yog sib xws nrog Hastelloy C flanges, thiab dab tsi torque qhov tseem ceeb kom zoo gasket compression yam tsis muaj kev puas tsuaj rau lub flange?

A: Kev xaiv bolting kom raug thiab daim ntawv thov torque yog qhov tseem ceeb rau Hastelloy C flanges kom ua tiav cov pa tawm -kev ua haujlwm pub dawb thaum tiv thaiv kev puas tsuaj los yog kev ntxhov siab rau lub flange.

Bolting Khoom Xaiv:

Rau qhov siab tshaj Corrosion Resistance:

Hastelloy C-276 Bolting: Muab kev sib txuam corrosion tab sis muaj kev pheej hmoo ntawm galling thaum sib dhos vim zoo li metallurgy. Yuav tsum muaj cov tshuaj tiv thaiv kev sib txuas thiab ceev faj torque tswj.

Rau siab zog nrog zoo Corrosion Resistance:

Alloy 625 (UNS N06625): Zoo heev lub zog thiab corrosion kuj, tsis tshua muaj siab xav

Alloy 718 (UNS N07718): siab zog, haum rau siab kub

Alloy 400 (Monel): Zoo rau dej hiav txwv thiab txo qhov chaw

Rau General Service:

ASTM A193 Qib B8M Chav Kawm 2: Lim-hardened 316 stainless hlau, haum rau ntau cov kev pabcuam tshuaj mus txog 800℃F

ASTM A320 Qib L7M: Rau qis- kev pabcuam kub nrog kev tiv thaiv corrosion tsim nyog

ASTM A193 Qib B7: Carbon steel bolts feem ntau tsis pom zoo nrog Hastelloy C flanges hauv kev pabcuam corrosive, vim tias cov ntsia hlau corrosion tuaj yeem cuam tshuam kev sib koom ua ke thiab ua rau cov txheej txheem.

Kev Tiv Thaiv Kab Mob:

Nickel alloys zoo li Hastelloy C yog qhov ua rau khaus thaum zawm. Kev tiv thaiv kev ntsuas:

Siv los tiv thaiv- txeeb cov tebchaw (nickel-raws li lossis tooj liab-raws li, nyob ntawm kev pabcuam)

Siv cov roj nplua nyeem rau cov xov thiab lub ntsej muag txiv ntseej

Siv cov txiv ntseej ntawm qhov sib txawv hardness lossis cov khoom siv dua li cov studs

Tswj torque daim ntawv thov nrog calibrated cov cuab yeej

Torque xam:

Torque qhov tseem ceeb nyob ntawm flange loj, chav kawm, hom gasket, thiab lubrication. Cov lus qhia dav dav rau Hastelloy C flanges nrog PTFE lossis kauv qhov txhab gaskets:

Kev txiav txim siab tseem ceeb:

Bolt Stress: Lub hom phiaj bolt kev nyuaj siab feem ntau 30,000-40,000 psi rau stainless / alloy bolting

Gasket Stress: Yuav tsum tshaj qhov tsawg kawg ntawm qhov kev ntxhov siab tab sis nyob twj ywm hauv qab gasket crushing txwv

Txawm Tightening: Siv hla- qauv sib lawv liag nrog 30-50% torque increments

Retorquing: Tom qab thermal cycling, retorque rau account rau so

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4. Weld Npaj thiab Txuas

Q: Yuav ua li cas Hastelloy C flanges yuav tsum tau welded rau cov kav dej, thiab dab tsi ceev faj tiv thaiv weld defects thiab corrosion teeb meem?

A: Vuam Hastelloy C flanges rau cov kav dej yuav tsum tau ua tib zoo saib xyuas cov txheej txheem, kev huv, thiab cov txheej txheem los tswj kev tiv thaiv corrosion thiab kev ua haujlwm zoo.

Weld Joint Tsim:

Weld Neck Flanges: Lub hub tapered phim cov yeeb nkab phab ntsa tuab. Bevel npaj rau ASME B16.25 nrog 37.5℃suav nrog lub kaum sab xis thiab 1/16-nti hauv paus ntsej muag.

Slip-Ntawm Flanges: Ob lub fillet welds yuav tsum tau-ib qho hauv lub qhov, ib qho ntawm lub ntsej muag tom qab. Qhov tob qhov (socket) yuav tsum haum rau thermal expansion.

Qhov (socket) Weld Flanges: Cov yeeb nkab ntxig rau hauv qab ces tshem tawm 1/16 nti ua ntej vuam los tiv thaiv weld cag tawg los ntawm kev ntxhov siab.

Vuam txheej txheem:

GTAW (TIG) yog qhov zoo dua los siv cov khoom sib txuam hlau ERNiCrMo-4 (rau C-276) lossis ERNiCrMo-10 (rau C-22).

Kev ceev faj tseem ceeb:

Kev huv huv: Tshem tag nrho cov roj, roj, pleev xim, thiab cov khoom sib txuas. Siv cov acetone thiab cov ntaub huv huv. Chlorinated kuab tshuaj yog txwv tsis pub (tuaj yeem ua rau muaj kev ntxhov siab corrosion cracking).

Shielding Gas: 100% argon lossis argon-helium mixes. Thaub qab tshem tawm yuav tsum tau rau hauv paus dhau los tiv thaiv oxidation (qab zib). Flow tus nqi feem ntau 20-35 CFH.

Thaum tshav kub kub tswj: Interpass kub hauv qab 300℃F (150 degree). Tsawg tshav kub input tiv thaiv carbide nag lossis daus thiab tswj corrosion kuj.

Kev nrawm nrawm: nrawm txaus kom tsis txhob muaj cua sov, qeeb txaus rau fusion txaus. Stringer hlaws nyiam dua cov txheej txheem weave.

Tshaj tawm -Kev ntxuav vuam: Tshem tawm tag nrho cov cua sov thiab oxide txheej los ntawm stainless hlau hlau txhuam (dawb txhuam, tsis txhob siv cov pa roj carbon steel), sib tsoo, los yog pickling muab tshuaj txhuam.

Common Defects kom tsis txhob:

Porosity: Ua los ntawm kev sib kis los yog tsis txaus tiv thaiv cov pa roj

Kub Cracking: Hastelloy C raug yog sulfur lossis phosphorus tam sim no

Oxide Inclusions: Los ntawm kev tu tsis txaus ntawm kev hla dhau

Hauv paus Concavity: Los ntawm cov hlau tsis txaus los yog kev tshem tawm ntau dhau

Tshaj tawm -Weld Heat Treatment (PWHT):

Rau feem ntau Hastelloy C flanges, PWHT tsis tas yuav tsum tau yog tias cov txheej txheem vuam raug ua raws. Txawm li cas los xij, kev daws teeb meem annealing yuav tsim nyog yog tias:

Lub flange tau txias heev ua haujlwm ua ntej vuam

Cov tivthaiv yuav ua haujlwm hnyav corrosive ib puag ncig

Ntau qhov vuam hla dhau los ua kom muaj cua sov tseem ceeb- cuam tshuam thaj tsam nag lossis daus

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5. Cov Lus Qhia Tshwj Xeeb thiab Kev Ntsuas Zoo

Q: Dab tsi tshwj xeeb thiab kev kuaj xyuas zoo yog qhov tseem ceeb thaum muab Hastelloy C flanges rau kev pabcuam tshuaj lom neeg tseem ceeb?

A: Kev yuav khoom zoo ntawm Hastelloy C flanges yuav tsum muaj cov lus qhia dav dav thiab kev kuaj xyuas kom ntseeg tau tias cov khoom ua tau raws li qhov yuav tsum tau ua ntawm ob qho tib si thiab kev ua haujlwm ntawm metallurgical kev ncaj ncees rau kev pabcuam corrosive.

Qhov tseem ceeb Specifications:

1. Khoom siv:

Forged Flanges: ASTM B564 (Nickel Alloy Forgings)

Phaj -Txiav Flanges: ASTM B575 (Plate) nrog kev ua haujlwm ntxiv

Alloy Designation: UNS N10276 (C-276) lossis UNS N06022 (C-22)

2. Dimensional Standard:

ASME B16.5: Rau flanges NPS 24 thiab me dua, Chav Kawm 150-2500

ASME B16.47: Rau txoj kab uas hla loj flanges (Series A lossis B)

ASME B16.36: Rau orifice flanges

3. Kev kho cua sov:

Cov tshuaj annealed ntawm 2050℃F (1120 degree) yam tsawg kawg nkaus

Cov dej nrawm nrawm los tiv thaiv theem ob los nag

Tshawb xyuas los ntawm kev sim hardness thiab ASTM G28 corrosion testing

Kev Tshawb Fawb Kev Tshawb Fawb:

Dimensional soj ntsuam:

Sab nraud txoj kab uas hla, bolt lub voj voog txoj kab uas hla, hub qhov ntev

Lub ntsej muag flatness thiab tiav (xyuas Ra tus nqi nrog profileometer)

Npog txoj kab uas hla thiab phab ntsa thickness

Bolt qhov sib dhos thiab qhov sib txawv

Cov ntaub ntawv pov thawj:

Kev txheeb xyuas cov khoom zoo (PMI): XRF kuaj kom paub tseeb:

Molybdenum: 15-17% (C-276)

Chromium: 14.5-16.5%

Tungsten: 3-4.5%

Tsis muaj qhov tseem ceeb dilution lossis hloov pauv

Mechanical Testing:

Tensile zog: 100 ksi yam tsawg kawg nkaus

Yield zog: 40 ksi yam tsawg kawg nkaus

Elongation: 40% yam tsawg kawg nkaus

Hardness: Rockwell B 100 siab tshaj plaws

Corrosion Testing (rau kev pabcuam tseem ceeb):

ASTM G28 Txoj Kev A: Txheeb xyuas tus nqi corrosion<0.5 mm/month in boiling ferric sulfate-sulfuric acid

ASTM G48: Pitting kuj ntsuas

Kev kuaj tsis raug:

Kev soj ntsuam pom: 100% rau qhov tsis xws luag, laps, tawg

Liquid Penetrant Testing: Ib ASTM E165 rau txhua qhov chaw tiav

Kev Ntsuas Ultrasonic: Rau hnyav- phab ntsa flanges los xyuas kom meej lub suab sab hauv

Sib Nqus Particle: Tsis siv tau (tsis yog- khoom siv hlau nplaum)

Cov ntaub ntawv xav tau:

Mill Test Report (MTR): Tag nrho cov traceability nrog kev ntsuas kub

NDE Cov Lus Qhia: Muaj ntawv pov thawj los ntawm cov kws tshaj lij tsim nyog

Daim Ntawv Qhia PMI: Kev txheeb xyuas ntawm cov flange tiav

Daim Ntawv Qhia Txog Kev Kho Kub Kub: Lub Sijhawm -cov ntaub ntawv ntsuas kub

Certificate of Compliance: Kos npe daim ntawv pov thawj

Kev txiav txim siab tshwj xeeb:

Marking: Permanent, qis- kev nyuaj siab stamping nyob rau hauv tsis yog- hub cheeb tsam

Traceability: Thaum tshav kub kub tooj yuav tsum tshwm sim ntawm flange thiab cov ntaub ntawv

Ntim: Ib tus neeg qhwv lossis tiv thaiv txheej rau kev xa khoom hauv hiav txwv

Cia: Tiv thaiv los ntawm ya raws thiab chlorides ua ntej installation

Vim li cas Rigorous Procurement Matters:

Qhov flange tsis ua haujlwm hauv kev pabcuam tshuaj lom neeg tuaj yeem ua rau muaj kev puas tsuaj loj, kev puas tsuaj ib puag ncig, thiab kev pheej hmoo ntawm cov neeg ua haujlwm. Cov kev qhia tshwj xeeb thiab kev txheeb xyuas kom ntseeg tau tias Hastelloy C flange yuav muab ntau caum xyoo ntawm kev txhim khu kev qha, xau- kev pabcuam dawb hauv qhov chaw xav tau tshaj plaws.