Kev teeb tsa ntawm cov kav hlau txuas txuas yog txiav txim los ntawm peb yam: qhov zoo ntawm txhua qhov sib koom ua ke, qhov xwm txheej ntawm txheej txheej sab nraud tom qab faus, thiab kev qhuab qhia ntawm kev tshuaj xyuas niaj hnub ua raws li kev ua haujlwm. Cov ntsiab lus hauv qab no yog cov uas feem ntau txiav txim siab seb ib txoj kab dhau los ntawm nws thawj qhov kev sim siab thiab seb nws puas tseem muaj cov phab ntsa noj qab haus huv tom qab kaum xyoo ntawm kev pabcuam.
Ntawm -Site Docking of Spiral Welded Pipe
Ntxuav cov roj, xeb thiab oxide los ntawm cov yeeb nkab kawg ua ntej docking. Ib pawg ntxuav ntawm li 50 hli tom qab bevel yog qhov ua haujlwm tsawg kawg nkaus, vim tias kev sib kis hauv cheeb tsam no ua rau porosity thiab tsis muaj fusion hauv paus.
Khaws misalignment nyob rau hauv 10% ntawm phab ntsa thickness, thiab tsis ntau tshaj li lub meej cap hais nyob rau hauv qhov project specification, uas yog feem ntau 2 hli ntawm nyias - phab ntsa kab yeeb nkab. Siv cov clamps sab nraud los tuav cov concentricity thiab tsis txhob yuam qhov kawg ua ke.
Teem preheat los ntawm carbon sib npaug ntawm cov khoom, feem ntau 100 mus rau 200 degrees C rau phab ntsa thicknesses thiab qib siv nyob rau hauv kis tau tus mob thiab hluav taws xob kab, thiab xyuas nws nrog tus pas ntsuas kub tiv tauj tam sim ua ntej lub hauv paus hla.
Siv qis-hydrogen electrodes rau cov hauv paus hla, khaws cia rau hauv qhov cub tuav thiab pov tseg cov electrodes uas tau raug tshaj li cov txheej txheem txwv.
Tswj kev sib tshuam kub, feem ntau tsis siab tshaj 230 ° C rau cov qib siv hauv cov kab no, thiab ua tiav cov vuam yam tsis muaj kev cuam tshuam.
Tsim nyog cov txheej txheem vuam rau NB / T 47014 thiab siv cov vuam tsim nyog rau txoj haujlwm thiab txheej txheem; sau tus lej sib koom, tus kheej welder thiab cov khoom siv tau rau txhua qhov chaw vuam.
Kev kho ntawm Corroded Pipe Sections
Cov me me pitting uas tsis tau perforated phab ntsa tuaj yeem kho nrog cov ntaub qhwv los yog ob qho - cov txheej txheem kho cov khoom siv polymer, siv rau qhov chaw huv thiab ua kom zoo.
Thaum cov phab ntsa hauv zos poob siab tshaj 10% ntawm nominal thickness, ntxiv cov seem nrog lub tes tsho los yog hloov cov yeeb nkab seem. Lub tes tsho installation los ntawm vuam yuav tsum muaj kev ntsuam xyuas kev ntxhov siab thiab kev lees paub tias lub tes tsho yuav tsis tsim qhov chaw nyuaj.
Siab - cov kab siab raug kaw thiab ua rau muaj kev ntxhov siab ua ntej kev kho welded, thiab lub sijhawm kho tau raug kuaj xyuas ua ntej rov qab mus rau qhov kev pabcuam.
Mechanical clamp-hom kho connectors tso cai kho yam tsis muaj haujlwm kub thiab muaj txiaj ntsig zoo thaum lub sijhawm nkag los yog kaw lub sijhawm txwv.
Rov ua dua txheej txheej sab nraud ntawm txhua qhov kev kho, thiab sau txoj haujlwm, qhov ntev thiab txoj hauv kev kom qhov kev tshuaj xyuas tom ntej tuaj yeem tsom rau tib qhov chaw.
Muab tso rau hauv qhov chaw txias thiab khov
Qhia kom siab -tuaj yeem kab yeeb nkab xws li L450 lossis X65 nrog rau qhov siab Charpy qhov yuav tsum tau ua rau qis- qhov kub thiab txias, txij li cov qib txheem tuaj yeem ua nkig ntawm qhov tsim yam tsawg kawg nkaus hlau kub.
Teem lub faus qhov tob hauv qab qhov siab tshaj plaws Frost nkag mus. Qhov twg yog qhov ua tsis tau zoo, siv cov rwb thaiv tsev los yog cov cua sov tracing, thiab nce qhov tob hauv zos ntawm txoj kev thiab cov kav dej hla.
Siv polyurethane ua npuas ncauj rwb thaiv tsev los yog ib qho hluav taws xob cua sov tracing system los tiv thaiv kom tsis txhob khov ntawm qhov nruab nrab, thiab tso cai rau ib qho kev hloov pauv hloov tau yooj yim kom nqus cov te heave txav tsis tau thauj cov yeeb nkab.
Backfill nrog thawed, granular khoom dawb los ntawm khov lumps thiab pob zeb, uas yuav txwv tsis pub tsim taw tes loads ntawm cov yeeb nkab thiab txheej.
Sau cov ntaub ntawv ntsuas kub hauv av thiab kev sib hais haum thaum thawj lub caij ntuj no kom cov kev xav tau tsim tuaj yeem kuaj xyuas.
Sab hauv txheej thiab hauv ob sab phlu kho
Ob -cov khoom ua kua epoxy yog tsim rau kev kho qhov chaw kho qhov chaw nkag tau thiab thaj chaw me me.
UV-kho hauv ob sab phlu (kho-hauv- qhov chaw yeeb nkab) tuaj yeem kho qhov ntev ntev hauv ib qho kev teeb tsa, uas haum rau cov kav dej uas qhov kev khawb av nyuaj.
Txau- siv fusion bonded epoxy lossis epoxy hauv ob sab phlu siv los ntawm ib tus neeg hlau sab hauv muab kev tswj cov tuab thiab siv rau tag nrho - tho qhov rov ua dua ntawm cov kav dej loj.
Mechanical tes tsho txoj kev raws li cov duab nco alloy yog siv rau cov kab me me, feem ntau DN300 thiab hauv qab no, qhov twg lwm lub tshuab tsis tuaj yeem qhia.
Txhua cov khoom kho yuav tsum dhau qhov kev ntsuas cathodic disbondment uas yuav tsum tau ua los ntawm cov txheej txheem txheej txheem, thiab txhua qhov ua tiav thaj yuav raug kuaj xyuas los ntawm kev kuaj xyuas hnub so thiab txheej thickness ntsuas.
Kev tshuaj xyuas lub voj voog thiab cov ntaub ntawv
Kev tshuaj xyuas sab hauv nrog cov cuab yeej siv npua ntawm lub sijhawm kwv yees li peb mus rau tsib xyoos rau siab - cov kab sib kis, nrog rau lub caij luv luv qhov twg tus nqi corrosion nce.
Cov txheej txheem txheej txheej sab nrauv tshawb xyuas txhua ob xyoos, siv cov hluav taws xob ncaj qha tam sim no gradient lossis tam sim no daim ntawv qhia txoj kev, ua ke nrog cathodic tiv thaiv kev nyeem ntawv.
Taug kev- nqis los tshuaj xyuas cov ntu tseem ceeb xws li kev hla dej, txoj hauv kev thiab hauv nroog txoj kev hauv nroog ib hlis ib zaug, sau cov peev txheej tiv thaiv cathodic ntawm cov ntsiab lus ntsuas ruaj khov.
Fiber-Optic hom thiab ntsuas kub nyob rau hauv geohazard thaj chaw, nrog phased array ultrasonic re- tshuaj xyuas ntawm txhua seem uas qhia tau hais tias txawv txav.
Khaws ib daim ntawv teev cov kav dej uas muaj cov pob qij txha, kho, txheej txheej tsis xws luag, kev tiv thaiv muaj peev xwm thiab kev soj ntsuam xyuas, txhua qhov chaw thiab hnub tim, yog li ntawd cov xwm txheej yuav raug soj ntsuam.
FAQ
Q: Dab tsi yog kev ceev faj rau ntawm - qhov chaw docking ntawm kauv welded yeeb nkab?
Ntxuav cov roj thiab oxide los ntawm cov yeeb nkab kawg band, khaws misalignment nyob rau hauv 10% ntawm phab ntsa thickness thiab nyob rau hauv lub project cap, siv sab nraud alignment clamps kom concentricity, thov preheat teem los ntawm cov pa sib npaug, thiab siv tsawg - hydrogen electrodes nrog ib tug tswj interpass kub.
Q: Yuav ua li cas kho qhov corroded yeeb nkab seem?
Plua plav pitting yog kho nrog cov khoom sib xyaw lossis polymer. Thaum cov phab ntsa hauv zos poob siab tshaj 10% ntawm nominal thickness, siv lub tes tsho los yog hloov seem, nrog rau txoj kab depressurised rau welded kho, ua raws li kev ntsuam xyuas siab thiab txheej txheej rov qab.
Q: Dab tsi yog qhov txawv ntawm kev tso cov yeeb nkab rau hauv av khov?
Siab dua -tuaj kab yeeb nkab tau teev tseg rau qis- qhov kub thiab txias, qhov faus qhov tob mus rau hauv qab qhov siab tshaj plaws frost nkag mus, rwb thaiv tsev los yog cua sov tracing tiv thaiv kom khov, hloov pauv hloov seem nqus te heave, thiab backfill yuav tsum tsis pub khov thiab pob zeb.
Q: Cov txheej txheem kho hauv ob sab hauv twg muaj?
Ob -cov khoom ua kua epoxy rau cov chaw ua haujlwm, UV- kho hauv ob sab phlu rau ib leeg ntev -ntev rehabilitation, neeg hlau- siv fusion bonded epoxy los yog epoxy rau kev tswj tag nrho - kho kho, thiab cov duab nco lub tes tsho rau cov kab me me. Tag nrho cov ntaub ntawv yuav tsum xeem dhau qhov kev xeem cathodic disbondment.
Q: Lub voj voog kev tshuaj xyuas dab tsi siv rau lub siab - lub raj xa dej siab?
Kev tshuaj xyuas sab hauv txhua peb mus rau tsib xyoos, kev soj ntsuam txheej txheej sab nraud txhua ob xyoos, taug kev txhua hli- nqes ntawm cov ntu tseem ceeb nrog cathodic tiv thaiv kev nyeem ntawv, thiab kev soj ntsuam tas li nyob rau hauv thaj chaw geohazard nrog phased array ultrasonic ua raws- thaum cov ntaub ntawv txawv txav.
Q: Vim li cas thiaj khaws cov ntaub ntawv kho dua tshiab thiab tshawb xyuas cov ntawv nyeem?
Vim tias qhov xwm txheej raug txiav txim los ntawm qhov sib txawv, tsis yog los ntawm ib qho kev nyeem ntawv. Corrosion npaum li cas, txheej degradation thiab kev tiv thaiv muaj peev xwm drift tsuas yog pom thaum nyeem ntawm tib txoj hauj lwm raug muab piv rau lub sij hawm, thiab qhov kev sib piv ntawd tsav lub sijhawm soj ntsuam tom ntej.
