Xaiv Phau Ntawv Qhia rau Flowmeters ntawm Metering Skids
Kev xaiv cov flowmeters rau metering skids yuav tsum tau ua raws li cov yam ntxwv ntawm cov xov xwm, kev khiav hauj lwm tsis, qhov yuav tsum tau muaj, thiab installation ib puag ncig. Qhov tseem ceeb yuav tsum tau ua kom tau raws li kev ua raws cai thiab kev ruaj ntseg rau kev ntsuas nyiaj txiag (kev lag luam kev sib hais haum) thiab kev tswj cov txheej txheem, thaum tseem suav nrog kev tiv thaiv tawg, kev tiv thaiv ib puag ncig, thiab tag nrho cov nqi ntawm lub neej.
I. Tsib -Txoj Kev Xaiv Qhov Tseem Ceeb
1. Txiav txim siab qhov tseeb thiab ntau yam (Kev txiav txim siab rau kev ntsuas kev ntseeg siab)
Chav Kawm raug: Rau kev ntsuas nyiaj txiag, raws li cov qauv xws li GB / T 21456, qhov tseem ceeb yuav tsum tau muab rau chav kawm raug ntawm ± 0.2% rau ± 0.5% FS (Full Scale). Rau cov txheej txheem tswj kev siv, qhov kev xav tau no yuav tsum tau so rau ± 0.5% rau ± 1.0% RD (ntawm Kev Nyeem Ntawv).
Turndown Ratio: Cov kev khiav hauj lwm zoo npaum li cas yuav tsum poob li ntawm 50% mus rau 80% ntawm tag nrho cov 'meter'. Qhov yuav tsum tau turndown ratio yuav tsum muaj ntau dua los yog sib npaug rau 10: 1 (rau qis- cov kab mob hloov pauv) lossis Ntau dua lossis sib npaug rau 30: 1 (rau qhov dav - thaj tsam ntau) txhawm rau tiv thaiv qhov kev poob qis hauv qhov qis - ntws.
Flow Range: Qhov siab tshaj plaws ntws yuav tsum tau teem rau ntawm 1.2 npaug ntawm tus nqi tsim, thiab qhov tsawg kawg nkaus ntws tus nqi yuav tsum siab tshaj lossis sib npaug rau 1/10 ntawm qhov siab tshaj plaws ntws (ib ISO 16139); yog tias tsim nyog, cov txheej txheem xaiv yuav raug muab faib ua ntau yam.
2. Match Media yam ntxwv (Qhov tseem ceeb ua ntej rau kev sib raug zoo)
Conductive Liquids (Conductivity Ntau dua lossis sib npaug li 5 μS / cm): Electromagnetic Flowmeters; yuav tsum muaj tag nrho -cov kav dej ntws thiab corrosion- cov kab resistant (xws li PTFE lossis ceramic).
Tsawg-Viscosity, Cov kua dej huv (Cov Roj / Dej): Turbine lossis Oval Gear Flowmeters; yuav tsum tau huv media tej yam kev mob, yuav tsum tau lub installation ntawm ib tug upstream lim.
High-Viscosity Liquids (>10 mPa·s): Oval Iav lossis Coriolis Flowmeters; yuav tsum tiv taus qhov kub thiab txias, thiab xav tau cov ntaub ntawv sealing tsim nyog.
Cov kua uas muaj cov khoom / npuas: Doppler Ultrasonic Flowmeters; xav kom zam dhau qhov kev cuam tshuam muaj zog thiab kev saib xyuas ntawm qhov chaw ntws ruaj khov.
Gases/Natural Gas: Gas Turbine lossis Roots Flowmeters; yuav tsum tau kub thiab siab them nyiaj, thiab yog haum rau nruab nrab - mus rau - high pressure applications.
3. Txheeb xyuas cov kev khiav hauj lwm tsis zoo (tseem kom muaj kev nyab xeeb thiab ruaj khov)
Temperature/Pressure: The instrument's rated temperature and pressure limits must equal or exceed the extreme values of the operating conditions. For high-temperature applications (>100°C), select jacketed or high-temperature-resistant models; for high-pressure applications (>3 MPa), xaiv cov qauv uas muaj siab -siab- ntsuas vaj tse. Kev xav tau kev poob siab: Rau qhov tsawg- poob qhov xwm txheej, ua qhov tseem ceeb ntawm ultrasonic lossis electromagnetic flowmeters; qhov twg lub siab poob yog tso cai, xaiv turbine los yog teb lobe flowmeters kom sib npaug qhov tseeb nrog lub zog efficiency.
Material Compatibility: Rau cov xov xwm corrosive heev, siv electrodes ua los ntawm Hastelloy los yog titanium alloys; rau qhov phom sij (tawg- pov thawj) thaj chaw, xaiv cov khoom ntsuas Exd IICT6 lossis siab dua, nrog kev tiv thaiv ingress (IP) ntsuas ntawm IP65 lossis siab dua.
4. Installation Condition Compatibility (Qhov cuam tshuam ntev -Lub Sijhawm Stability)
Txoj Kev Ncaj Ncees Ncaj Ncees Yuav Tsum Tau Ua: Ua kom cov yeeb nkab ncaj ncaj khiav ntawm Ntau dua lossis sib npaug ntawm 10D ntws thiab loj dua lossis sib npaug ntawm 5D nqes dej (qhov twg D yog cov yeeb nkab txoj kab uas hla) kom ntseeg tau tias qhov chaw ntws ruaj khov; tso lub cuab yeej deb ntawm qhov chaw vibration xws li twj lossis compressors.
Installation Method: Kab rov tav lossis ntsug installation yuav tsum ua raws li cov qauv ntsuas; rau kev teeb tsa ntsug, xyuas kom cov dej ntws ntws mus raws li cov cim taw qhia ntawm lub ntsuas. Rau loj- txoj kab uas hla kav, clamp- ntawm ultrasonic flowmeters yog ib qho kev xaiv uas tshem tawm qhov yuav tsum tau txiav rau hauv cov kav dej.
Teeb liab thiab hluav taws xob: Hauv thaj chaw muaj kev phom sij, xaiv cov teeb liab nyob hauv qhov kev nyab xeeb cais; xyuas kom cov khoom siv hluav taws xob ua tau raws li qhov xav tau ntawm qhov hluav taws xob hauv zos thiab tau nruab nrog kev tiv thaiv surge.
5. Kev ua raws cai thiab tag nrho cov nqi ntawm lub neej (Civ txwv rau kev siv)
Kev ua raws cai thiab ntawv pov thawj: Rau kev saib xyuas kev hloov pauv (kev ntsuas kev lag luam), cov cuab yeej yuav tsum tuav daim ntawv tso cai rau kev ntsuas ntsuas thiab ua raws li cov qauv ntsuas xws li GB / T 26762.
Cov Nqi Kho Mob: Ua ntej cov qauv uas yooj yim rau disassemble thiab huv si, lossis cov uas siv cov qauv tsim nyog, cov khoom siv tau yooj yim. Rau siab- ib puag ncig kev tu, xaiv rau kev txij nkawm- cov kev daws teeb meem dawb (xws li, ntau- txoj kev ultrasonic flowmeters) lossis cov qauv uas hnav tsawg heev- cov khoom siv yooj yim.
Calibration thiab Tom qab-Kev Pabcuam Muag: Kom meej meej lub voj voog calibration (feem ntau yog 12 lub hlis) thiab xyuas kom meej tias cov chaw tsim khoom muab rau ntawm -cov kev pabcuam calibration thiab kev pabcuam.
II. Cov lus pom zoo xaiv rau kev ua haujlwm zoo
Refined Roj / Roj Roj Metering Skids: Ua ntej rotary lobe (Roots) flowmeters, muab qhov tseeb ntawm ± 0.2% rau ± 0.5%. Cov no zoo - haum rau nruab nrab- rau - cov kua dej viscosity siab thiab siab siab, thiab muab kev rov ua tau zoo dua. Ua ke nrog Y- lim dej (nrog mesh loj dua lossis sib npaug rau 100) thiab chav ntsuas kub / qhov siab kom tau raws li qhov yuav tsum tau ua ntawm kev saib xyuas kev hloov pauv.
Dej-Txiav Roj / Particle-Laden Media: Xaiv Doppler ultrasonic flowmeters, uas tsis muaj qhov txav txav (kom ntseeg tau tias hnav tsis kam) thiab muab qhov sib piv dav dav. Xwb, xav txog electromagnetic flowmeters (muab cov kua ua tau raws li qhov yuav tsum tau ua), nruab nrog cov khoom tiv thaiv- fouling electrodes thiab cov khoom tshwj xeeb. Natural Gas / Combustible Gas Metering Skids: Rau qis - mus rau - nruab nrab tus nqi ntws, xaiv Gas Roots Flowmeter (qhov tseeb: ± 0.5%); rau cov nqi ntws siab (DN300+), xaiv Multi-channel Ultrasonic Gas Flowmeter (zero siab poob, 100: 1 turndown ratio). Ob qho kev xaiv xav tau kev teeb tsa nrog qhov kub thiab txias, nrog rau kev tawg -cov ntaub ntawv pov thawj.
Corrosive Liquid Metering Skids: Xaiv ib qho Electromagnetic Flowmeter; siv PTFE lossis roj hmab liners, thiab xaiv Hastelloy C-276 lossis Titanium alloy rau cov electrodes. Qhia meej qhov kev ntsuas tawg-pov thawj ntawm Ex ia IICT6 thiab qhov ntsuas kev tiv thaiv ingress ntawm IP66.
III. Tseem ceeb Pitfalls kom zam
Tsis txhob saib xyuas qhov nruab nrab qhov viscosity thiab huv si thaum lub sijhawm xaiv, vim qhov no tuaj yeem ua rau txhaws lossis hnav ntau dhau hauv Turbine lossis Roots flowmeters.
Electromagnetic flowmeters yuav tsum nruj me ntsis * tsis * siv los ntsuas cov kua insulating (xws li cov roj ntshiab); xyuas kom meej tias qhov nruab nrab qhov hluav taws xob conductivity yog ntau dua lossis sib npaug li 5 μS / cm.
Hauv ib puag ncig uas muaj kev vibration muaj zog, tsis txhob siv Vortex lossis Turbine flowmeters; ua ntej Electromagnetic los yog Ultrasonic flowmeters los tiv thaiv teeb liab cuam tshuam.
Rau kev saib xyuas kev hloov pauv (kev lag luam) metering daim ntawv thov, xyuas kom meej tias cov chaw nres nkoj tshwj xeeb rau kev txheeb xyuas thiab ntsuas ntsuas tau muab los xyuas kom ua raws li txoj cai ntsuas ntsuas.
IV. Kev xaiv ceev ceev
Hom nruab nrab, viscosity, hluav taws xob conductivity, thiab muaj cov khoom khib nyiab lossis roj
Tsim tus nqi ntws, siab tshaj / tsawg kawg nkaus tus nqi, thiab yuav tsum tau turndown ratio
Ua haujlwm kub, siab, thiab tso cai poob siab
Pipe nominal txoj kab uas hla, khoom, thiab installation orientation (kab rov tav / ntsug)
Cov chav kawm raug (Custody Transfer / Txheej Txheem Tswj), tawg - pov thawj ntsuas, thiab ntsuas kev tiv thaiv ingress
Calibration cycle yuav tsum, yooj yim ntawm kev saib xyuas, thiab kev txwv nyiaj txiag
Xaus: Lub hauv paus ntsiab lus tseem ceeb hauv kev xaiv cov flowmeters rau metering skids yog qhov tseem ceeb ntawm kev sib raug zoo nrog kev ua haujlwm thiab kev ua raws cai. Los ntawm kev txhais cov kev txwv tsis pub siv tsib-kab ruam txoj hauv kev uas tau teev tseg saum toj no-thiab ua raws cov kev xaiv nrog rau qhov nruab nrab thiab ib puag ncig tej yam kev mob-ib tus tuaj yeem sib npaug qhov ntsuas qhov tseeb, kev nyab xeeb kev ua haujlwm, thiab ntev - lub sijhawm ruaj khov.
