Pipeline valve txais, kev ntsuas siab, Kev teeb tsa thiab cov teeb meem xav tau kev saib xyuas Dab tsi yuav tsum tau them sai sai rau thaum lub raj xa dej valve raug teeb tsa?

Pipeline valve txais, kev ntsuas siab, Kev teeb tsa thiab cov teeb meem xav tau kev saib xyuas Dab tsi yuav tsum tau them sai sai rau thaum lub raj xa dej valve raug teeb tsa?

Hauv cov kav dej hauv cov kav dej, cov li qub yog cov tswj hwm lub luag haujlwm uas nws lub luag haujlwm tseem ceeb yog cais cov khoom siv thiab cov kav dej, tswj cov dej ntws, tiv thaiv rov qab, tswj thiab tawm siab. Nws tuaj yeem siv los tswj cov huab cua, dej, chav dej, txhua yam ntawm cov xov xwm corrosive, av nkos, roj, kua hlau thiab xov tooj cua. Vim tias cov kav dej xaiv lub valve uas haum tshaj plaws yog qhov tseem ceeb heev, yog li kom nkag siab cov yam ntxwv ntawm lub valve thiab xaiv cov kauj ruam ntawm lub valve thiab lub hauv paus kuj tseem ceeb heev.
Cov li qub
Hauv cov kav dej hauv cov kav dej, cov li qub yog cov tswj hwm lub luag haujlwm uas nws lub luag haujlwm tseem ceeb yog cais cov khoom siv thiab cov kav dej, tswj cov dej ntws, tiv thaiv rov qab, tswj thiab tawm siab. Nws tuaj yeem siv los tswj cov huab cua, dej, chav dej, txhua yam ntawm cov xov xwm corrosive, av nkos, roj, kua hlau thiab xov tooj cua. Vim tias cov kav dej xaiv lub valve uas haum tshaj plaws yog qhov tseem ceeb heev, yog li kom nkag siab cov yam ntxwv ntawm lub valve thiab xaiv cov kauj ruam ntawm lub valve thiab lub hauv paus kuj tseem ceeb heev.
4 txoj haujlwm ntawm lub raj xa dej valve
Ua ntej, txiav tawm thiab tso tawm nruab nrab
Qhov no yog lub hauv paus kev ua haujlwm ntawm lub valve, feem ntau xaiv ib txoj kab ncaj nraim, nws cov dej tsis kam yog me me.
Downward kaw valve (globe valve, plunger valve) vim nws txoj kev ntws ntws tawm, ntws tsis kam siab dua li lwm cov li qub, yog li xaiv tsawg dua. Kaw li qub tuaj yeem siv tau qhov kev tso cai siab txaus.
Ob, tswj qhov ntws
Lub valve uas yooj yim kho feem ntau yog xaiv los tswj kev ntws. Downward CLOSING li qub (xws li GLOBE li qub) yog qhov tsim nyog rau lub hom phiaj no vim tias lub rooj zaum loj yog qhov tsim nyog rau STROKE NTAWM LUB SHUTOFF.
Teb VALVES (PLUG, npauj npaim, pob li qub) thiab FLEXURE BODY VALVES (PINCH, DIAPHRAGM) tseem muaj rau kev tswj hwm, tab sis feem ntau tsuas yog nyob rau hauv qhov txwv ntau ntawm valve DIAMETERS.
Gate VALVE YOG Lub rooj vag zoo li lub disc rau lub rooj zaum ncig lub rooj tsav tsheb los ua cov lus tsa suab, nws tsuas yog nyob ze rau ntawm txoj haujlwm kaw, tuaj yeem tswj tau qhov ntws zoo dua, yog li feem ntau tsis siv rau kev tswj dej ntws.
Peb, commutation shunt
Lub valve tej zaum yuav muaj peb lossis ntau dua, nyob ntawm qhov xav tau rau kev thim rov qab thiab kev hloov pauv. Plug thiab pob li qub yog qhov tsim nyog rau lub hom phiaj no, thiab yog li ntawd, feem ntau cov li qub siv rau kev thim rov qab thiab hloov pauv tau raug xaiv los ua ib qho ntawm cov li qub no.
Txawm li cas los xij, hauv qee kis, lwm hom VALVES kuj tseem siv tau raws li kev hloov pauv hloov pauv, muab tias ob lossis ntau lub valve tau txuas nrog rau ib leeg.
4. Nruab nrab nrog cov khoom tshem tawm
Thaum qhov nruab nrab nrog cov khoom raug tshem tawm, ** haum rau kev siv cov khoom kaw raws li qhov sib khi ntawm qhov zawv zawg valve nrog wiped txiav.
Yog hais tias lub kaw lus yog vertically mus rau lub nraub qaum thiab FORTH txav ntawm lub rooj zaum, cov khoom yuav raug kaw, yog li lub valve no tsuas yog tsim nyog rau kev siv tshuab ntxhua khaub ncaws tshwj tsis yog cov khoom siv sib khi yuav tsum tau tso cai. Pob li qub thiab ntsaws li qub so lub sealing nto thaum lub sij hawm qhib thiab kaw, yog li lawv yog haum rau siv nyob rau hauv xov xwm nrog tshem tawm hais.
Pipeline valve ua ib feem tseem ceeb ntawm cov txheej txheem txheej txheem. Kev txhim kho zoo ntawm cov kav dej valve ncaj qha txiav txim siab qhov kev paub zoo ntawm cov haujlwm muaj feem xyuam ntawm cov txheej txheem txheej txheem. Cov kev sib txuas tseem ceeb ntawm nws cov kev tswj hwm yog raws li hauv qab no:
1, kev soj ntsuam valve thiab txais
1.1 Kev tshuaj xyuas ntawm lub valve: tsis muaj qhov pores, trachoma, tawg thiab xeb hauv lub cev valve; qia tsis muaj dabtsi yog khoov, corrosion tshwm sim, qia xov yog du, zoo huv si tsis tawg hlau; Gland nrog zoo, yoog raws kev sib hloov ntawm tes; Flange sealing nto tsis muaj khawb, pockmarks, thiab lwm yam .; Xov sib txuas zoo; Tsim nyog welding groove. Valve me ntsis naj npawb, siab thiab lwm yam tsis zoo raws li tus qauv tsim.
1.2 Kev tshuaj xyuas cov ntaub ntawv: Cov ntaub ntawv feem ntau suav nrog: cov phiaj xwm zoo, cov ntaub ntawv pov thawj, cov duab kos, cov ntaub ntawv xeem, phau ntawv saib xyuas, kev cia khoom, thiab daim ntawv pov thawj ntawm kev ua raws. Cov uas tsis sib haum xeeb yuav tsum muaj cov ntaub ntawv tso tawm raws li kev cai thiab cov chaw tsis ua raws li daim ntawv teev npe.
2. Valve cia thiab tu yuav tsum
Khaws lub valve inlet thiab qhov hluav taws xob kaw thiab tso desiccant, hloov tsis tu ncua raws li cov lus qhia desiccant. Txiav txim siab kub, av noo thiab ib puag ncig yuav tsum tau khaws cia raws li cov ntaub ntawv kho valve. Rau stainless hlau li qub, ceev faj xaiv cov khoom tsis-halogen wrapping. Valves yuav tsum tau kuaj xyuas thiab khaws cia tsis tu ncua thaum lub sijhawm khaws cia.
3, valve siab test
Vim tias lub valve tau ua tiav lub plhaub, lub rooj zaum thiab kaw qhov kev ntsuas siab ua ntej tawm hauv lub Hoobkas, tsuas yog ua qhov kev xeem kaw ntawm lub valve ntawm qhov chaw. Rau lub peev xwm thiab kev faib ua feem ntawm kev txheeb xyuas, lub teb chaws tus qauv GB50184-2011 piav qhia txog qhov kev faib ua feem ntawm qhov kev ntsuam xyuas qhov siab, cov qauv txawv teb chaws tsis muaj qhov yuav tsum tau ua. Feem ntau tus tswv yog txiav txim siab raws li kev saib xyuas zoo thiab siv cov kev paub dhau los ntawm lub valve tsim theem, thiab lub valve dav dav yuav tsum tau kaw 100% hauv lub tshav pob.
3.1 Test nruab nrab yuav tsum tau: lub valve xeem nruab nrab yog dej; Siv cov qib sib txawv ntawm cov dej zoo raws li kev huv ntawm qhov system; Txawm li cas los xij, thaum lub valve ua haujlwm nruab nrab yog roj, qhov ntsuas nruab nrab yog nyiam siv cov roj qhuav tsis muaj compressed cua lossis nitrogen, thiab tuaj yeem hloov tau los ntawm dej siab.
3.2 Kev txiav txim siab kaw qhov ntsuas siab: Cov kev cai rau kaw qhov ntsuas siab ntawm cov li qub hauv GB / T13927-2008 thiab ASME B16.34 thiab MSS-SP-61 yog qhov pib zoo ib yam. Lub HYDROSTATIC TEST PRESSURE yog 1.1 SIJ HAWM Rated Pressure rau lub VALVE PRESSURE CLASS ntawm 100OF, los yog ib qho kev ntsuas siab tsawg dua 80psi tuaj yeem siv tau. Thaum lub VALVE NAMEplate tau cim nrog lub zog ua haujlwm loj sib txawv lossis lub tshuab ua haujlwm ntawm lub valve tsis haum rau kev ntsuas siab siab sealing siab, qhov kev ntsuas siab tuaj yeem nqa tawm raws li 1.1 npaug ntawm qhov kev ua haujlwm loj dua qhov sib txawv cim nrog lub valve npe.
3.3 Kev ntsuam xyuas cov txiaj ntsig kev xeem: Lub valve kaw qhov ntsuas qhov tshwj xeeb tsuas yog xav tau qhov kev xeem kom dhau lub sijhawm luv tshaj plaws, thiab tsis muaj qhov tshwj xeeb yuav tsum kaw qhov ntsuas tsis pub tsawg tshaj 5 feeb hauv kev ua haujlwm tiag tiag. Lub valve kaw nrog cov khoom siv tau yooj yim yuav tsum tsis muaj qhov pom pom thiab tsis muaj qhov poob siab ntawm lub ntsuas siab thaum lub sijhawm tuav lub sijhawm. Rau ib feem ntawm lub VALVE DESIGN uas tso cai rau cov dej xau, USSS tuaj yeem ntsuas qhov dej ntws ncaj qha rau ib lub sijhawm lossis siv cov naj npawb ntawm cov npuas lossis cov dej ntws raws li tau piav qhia hauv MSS-SP-61 PRESSURE TEST. Leakage yog hais txog lub nominal txoj kab uas hla ntawm lub valve. Qhov kev xav tau ntawm lub teb chaws tus qauv zoo ib yam li Asmeskas tus qauv.
4. Valve installation
4.1 Cov ntaub ntawv txheeb xyuas ua ntej kev teeb tsa: Txheeb xyuas tus lej me ntsis, tus lej xov tooj, hom, qib siab thiab lwm yam ntaub ntawv ntawm cov khoom lag luam raws li cov ntaub ntawv valve hauv cov duab kos thiab tsim cov ntaub ntawv hloov pauv ntawm ***, thiab xyuas seb qhov chaw teeb tsa thiab tom qab. chaw kho mob txaus. Kev ua haujlwm valve yog siv tau.
4.2 Kev tiv thaiv Valve: Rau qhov tsis zoo ntawm lub valve, kev tiv thaiv kev sib tsoo lossis kev tiv thaiv nyuaj tuaj yeem nqa tawm ua ntej kev teeb tsa. Cov kav dej thiab cov khoom siv rau kev teeb tsa lub valve yuav tsum tau muab tshem tawm ua ntej kom paub tseeb tias qhov kev huv huv sab hauv los tiv thaiv cov khib nyiab hauv cov kav dej thiab cov khoom siv los ntawm kev puas tsuaj rau lub sealing nto ntawm lub valve.
4.3 Kev taw qhia kev teeb tsa: Cov kev taw qhia ntws tau cim rau ntawm lub valve lub cev yuav tsum ua raws li cov kev taw qhia ntws ntawm qhov nruab nrab. Kev ruaj ntseg valve yuav tsum tau mounted vertically. Rau qhov nqa daim tshev valve, tsuas tuaj yeem ntsia tau rau hauv kab rov tav raj yuav tsum xyuas kom meej tias lub valve disc ntsug; Rau viav vias kos li qub, khaws tus pin theem.
4.4 Valve installation thiab txuas:
Weld li qub: CHECK valve groove loj, paub meej tias cov khoom siv valve, siv WPS kom raug. Rau qhov muag foob welding valve, thaum vuam, tuaj yeem tshem tawm lub nplhaib sealing tom qab vuam, vuam tiav kom rov nruab lub nplhaib sealing; Nws kuj tseem tuaj yeem tswj tau los ntawm lub valve qhib thiab vuam kub raws li cov neeg tsim khoom xav tau. Rau VALVES YUAV TSUM tau txais kev kho cua sov ua ntej thiab tom qab vuam ntawm cov phab ntsa tuab ntawm cov kav dej, ua tib zoo saib xyuas qhov ntsuas kub ntawm qhov nruab nrab ntawm lub valve thaum kho cua sov.
Flange valve: Txheeb xyuas tias qhov sib khi ntawm lub flange tsis muaj qhov tsis xws luag thiab daim ntawv sealing thiab qib siab ntawm kev sib txuas flange yuav tsum zoo ib yam. Nws yog txwv tsis pub txwv cov pab pawg. Bolts yuav tsum tau muab tso ywj siab, nruj symmetrically thiab torque kaw. Rau siab kub li qub tshaj 300, kub zawm flange thiab packing gland bolts nyob rau hauv kub kub.
Xov kev sib txuas: xav txog kev tshem tawm yooj yim, nws yog qhov zoo dua los teeb tsa cov pob qij txha hloov tau yooj yim ntawm ob qho kawg ntawm lub valve, ua tib zoo xaiv cov ntaub ntawv sib khi, rau tooj liab, cam khwb cia hlau tshuab tsis yog hlau li qub, cov xov tsis tuaj yeem screwed ib yam nkaus. nruj, thiaj li tsis mus ua puas lub valve.
5, valve muaj teeb meem thiab tswj kev ntsuas
Qhov teeb meem tshaj plaws hauv kev teeb tsa lub valve yog valve to. Cov laj thawj tseem ceeb yog:
1. Kev tsis zoo ntawm cov raj xa dej ua rau lub cev txawv teb chaws daig hauv qhov sib khi ntawm lub valve thiab ua rau lub sealing nto;
2, vuam kub tswj tsis zoo, ua rau lub valve foob hlawv tawm deformation;
3. Tom qab ua tiav qhov kev ntsuam xyuas hydraulic, lub valve tsis tau ntxuav thiab ziab hauv lub sijhawm, ua rau corrosion ntawm lub valve;
4, valve packing gland bolt tsis fastened;
5, valve packing foob tsis ua hauj lwm puas.
Cov cai dav dav rau kev teeb tsa
1. Lub installation txoj hauj lwm ntawm lub valve yuav tsum tsis txhob cuam tshuam rau lub lag luam, disassembly thiab txij nkawm ntawm cov khoom, pipeline thiab valve lub cev nws tus kheej, thaum noj mus rau hauv tus account lub tsos ntawm lub rooj sib txoos.
2. Rau li qub ntawm cov kav dej kab rov tav, nruab lub valve qia nce siab lossis ntawm ib lub kaum sab xis, tsis txhob nruab lub tes tuav hauv qab. Lub valve, qia thiab handwheel ntawm qhov siab siab yeeb nkab tuaj yeem ntsia tau kab rov tav, thiab qhov qhib thiab kaw ntawm lub valve tuaj yeem ua haujlwm nyob deb ntawm cov saw hlau hauv qhov chaw qis.
3. Kev sib xyaw ua ke, zoo nkauj thiab zoo nkauj; Lub valve ntawm lub riser, nyob rau hauv lub premise ntawm tso cai rau tus txheej txheem, lub valve handwheel mus rau hauv siab qhov siab ** tsim nyog ua hauj lwm, feem ntau 1.0-1.2m los ntawm hauv av yog tsim nyog, thiab lub valve qia yuav tsum tau ntsia raws li cov kev taw qhia ntawm tus neeg teb xov tooj.
4. Qhov nruab nrab ntawm qhov siab ntawm cov li qub nyob rau sab-los-sab riser yog qhov sib xws, thiab qhov kev ncua deb ntawm lub tes tuav tsis pub tsawg dua 100 hli; Valves ntawm kab rov tav kab rov tav yuav tsum tau staggered kom txo cov yeeb nkab sib nrug.
5. Thaum txhim kho qhov hnyav ntawm cov twj tso kua dej, cov khoom siv hluav taws xob thiab lwm yam khoom siv, kev txhawb nqa valve yuav tsum tau teeb tsa; Thaum lub valve feem ntau ua haujlwm thiab ntsia saum toj 1.8m ntawm qhov chaw ua haujlwm, yuav tsum tau muab lub platform ruaj khov.
6. Yog hais tias muaj ib tug xub cim rau ntawm lub valve lub cev, lub xub taw tes yog qhov ntws ntawm qhov nruab nrab. Thaum txhim kho lub valve, ceev faj kom cov xub taw qhia tib yam li qhov nruab nrab hauv cov kav dej.
7. Thaum txhim kho flange li qub, xyuas kom meej tias ob lub flange kawg lub ntsej muag yog tib yam thiab concentric, thiab tsis txhob siv ob lub flange.
8. Thaum txhim kho threaded li qub, lub threaded valve yuav tsum tau nruab nrog ib tug nyob sib txuas kom yooj yim disassembly. Kev teeb tsa ntawm kev sib txuas nyob yuav tsum xav txog qhov yooj yim ntawm kev saib xyuas, feem ntau yog cov dej ntws los ntawm lub valve thiab tom qab ntawd los ntawm kev sib txuas nyob.