Alloy steel kav yog dav siv nyob rau hauv petrochemical, fais fab, kev tsim kho, thiab machinery manufacturing industries vim lawv zoo heev corrosion kuj, siab zog, thiab siab -kub tsis kam.Lawv installation yuav tsum nruj me ntsis raws li kev specifications kom muaj kev ruaj ntseg thiab ntev - lub sij hawm stability ntawm cov kav dej. Kab lus no qhia cov kauj ruam ntawm kev teeb tsa thiab cov ntsiab lus tseem ceeb rau cov kav hlau alloy.
Ua ntej-Kev Npaj Kev Txhim Kho
1. Kev tshuaj xyuas cov khoom
Ua ntej kev teeb tsa, cov kav hlau alloy steel, fittings, thiab cov khoom sib txuas yuav tsum tau ua tib zoo tshuaj xyuas kom ntseeg tau tias lawv cov specifications thiab cov qauv ua tau raws li cov qauv tsim. Cov ntaub ntawv pov thawj yuav tsum raug txheeb xyuas kom paub meej tias cov alloy muaj pes tsawg leeg (piv txwv li, stainless hlau, nickel-raws li alloys, thiab lwm yam) ua tau raws li cov qauv xav tau. Tshawb xyuas cov yeeb nkab saum npoo rau qhov tsis xws luag xws li tawg, khawb, thiab corrosion, thiab ua tsis yog - kuaj kev puas tsuaj (xws li, ultrasonic lossis radiographic kuaj) yog tias tsim nyog.
2. Kev npaj cov cuab yeej thiab khoom siv
Nyob ntawm txoj kev teeb tsa (welding, threaded kev twb kev txuas, lossis flange txuas), npaj cov cuab yeej tsim nyog, xws li cov khoom siv vuam (argon arc welder lossis hluav taws xob welder), torque ciaj ntswj, cov cuab yeej txiav (plasma cutter lossis abrasive cutter), thiab cov cuab yeej nqa (xws li crane lossis phau ntawv hoist). Xyuas kom cov cuab yeej raug raws li qhov yuav tsum tau ua kom tsis txhob muaj teeb meem cov cuab yeej uas tuaj yeem cuam tshuam rau kev teeb tsa zoo.
3.Site Environment Assessment
Tshawb xyuas qhov chaw teeb tsa kom ntseeg tau tias muaj cua txaus hauv thaj chaw tsim kho. Tsis txhob welding nyob rau hauv cov av noo los yog flammable los yog tawg ib puag ncig. Yog tias cov yeeb nkab steel hlau siv los thauj cov xov xwm corrosive, yuav tsum muaj kev kho corrosion xws li txheej los yog cathodic tiv thaiv.
Alloy Steel Pipe Installation Cov kauj ruam
1. Yeeb Nkab Txiav thiab Beveling
Raws li cov qauv tsim, siv cov cuab yeej txiav tshwj xeeb los txiav cov yeeb nkab hlau alloy. Tom qab txiav, tshem tawm burrs ntawm cov yeeb nkab kawg thiab bevel cov kav dej (piv txwv li, V- lossis U-shaped bevels) raws li txoj kev sib txuas. Rau kev sib txuas welded, nruj me ntsis tswj lub bevel lub kaum sab xis thiab qhov sib txawv kom ntseeg tau qhov zoo ntawm vuam.
2.Pipe Prefabrication thiab los ua ke
Ua ntej kev teeb tsa, prefabrication ntawm cov kav dej, suav nrog ua ntej- sib dhos ntawm lub luj tshib, tees, thiab lwm yam fittings, tuaj yeem ua kom txo qis ntawm - qhov teeb meem kev tsim kho. Thaum lub sij hawm prefabrication, xyuas kom cov kav dej yog ncaj thiab perpendicular rau hauv av kom tsis txhob deformation uas yuav cuam tshuam rau tom ntej installation.
Kev xaiv kev sib txuas thiab kev siv
•Vuam: Cov txheej txheem vuam ntau rau cov kav hlau hlau muaj xws li GTAW (Geo-Tungsten Arc Vuam) thiab SMAW (Kev Taw Qhia Hlau Arc Vuam). Preheating (nyob ntawm seb hom alloy) yuav tsum tau ua ntej vuam, thiab qhov kub ntawm qhov sib cuam tshuam yuav tsum tau tswj kom tsis txhob thermal tawg. Tom qab-weld kev kho cua sov (xws li kev ntxhov siab annealing) yuav tsum tau ua los txhim kho kev sib koom tes.
•Flange Connection: Tsim nyog rau cov kav dej uas yuav tsum tau nquag disassembly. Thaum lub sij hawm kev teeb tsa, xyuas kom meej tias lub ntsej muag flange yog sib npaug, cov khoom siv gasket (xws li kauv lub qhov txhab gaskets lossis graphite gaskets) yog sib xws nrog cov kev xav tau ntawm cov xov xwm, thiab ceev cov bolts sib npaug mus rau qhov teev torque.
•Threaded Connection: Haum rau me me - cov kav dej. Sealing daim kab xev los yog daim kab xev raw yuav tsum tau siv los tiv thaiv cov xau, tab sis yuav tsum tau them nyiaj rau xov machining raug.
Yeeb Nkab Txhawb thiab Kho
Thaum lub sij hawm installation ntawm alloy steel kav, tsim nyog kev txhawb nqa thiab hangers yuav tsum tau ntsia kom tsis txhob muaj kev ntxhov siab concentration tshwm sim los ntawm cov yeeb nkab nws tus kheej qhov hnyav los yog thermal expansion. Qhov sib nrug ntawm kev txhawb nqa yuav tsum ua raws li cov qauv tsim, thiab cov khoom siv insulating (xws li roj hmab lossis polytetrafluoroethylene) yuav tsum tau muab ntsia rau ntawm cov ntsiab lus ntawm kev sib cuag nrog cov yeeb nkab los tiv thaiv electrochemical corrosion. III. Ncej -Kev Tshawb Fawb thiab Kev Ua Haujlwm
1. Kev Ntsuas Siab
Tom qab kev teeb tsa cov kav dej, yuav tsum tau kuaj dej los yog cua. Qhov kev ntsuas siab feem ntau yog 1.5 npaug ntawm qhov kev tsim siab, thiab lub siab yog tswj kom tsawg li 30 feeb los xyuas seb puas los yog deformation.
2.Leak Detection
Rau cov kav xa dej thauj cov tshuaj lom lossis cov nplaim hluav taws xob, helium huab hwm coj spectrometry lossis xab npum kuaj dej tuaj yeem siv los xyuas kom meej tias tag nrho cov pob qij txha raug kaw ruaj ntseg.
3. Kev kho zaum kawg thiab kev lees txais
Tshawb xyuas txoj kab nqes hav, txhawb kev ruaj ntseg, thiab kev ua haujlwm ntawm lub valve kom ntseeg tau tias lub kaw lus ua tau raws li cov txheej txheem. Tom qab lees txais, sau cov ntaub ntawv tsim kho, suav nrog cov khoom siv vuam, cov ntaub ntawv pov thawj, thiab cov ntawv xeem, thiab khaws cia rau yav tom ntej siv.
Cov kev ceev faj
• Kev tiv thaiv corrosion: Txawm hais tias cov kav hlau alloy steel muaj qhov zoo heev corrosion kuj, kev tiv thaiv ntxiv tseem yuav tsum tau muaj nyob rau hauv qee qhov chaw (xws li xov xwm nrog cov ntsiab lus chloride ion siab).
•Thermal Expansion Compensation: Ntev- cov kav dej nyob deb yuav tsum muaj cov pob qij txha txuas lossis lub luj tshib kom nqus tau cov cua sov.
• Kev Nyab Xeeb Kev Nyab Xeeb: Vuam thiab txiav cov haujlwm yuav tsum tau ua los ntawm cov neeg ua haujlwm tau ntawv pov thawj thiab ua raws li cov cai tswj kev nyab xeeb.
Los ntawm kev tshawb fawb thiab cov txheej txheem kev teeb tsa thiab kev tswj xyuas nruj, cov yeeb nkab steel hlau ua kom ntev - lub sijhawm ua haujlwm ruaj khov thiab ua tau raws li cov qauv siab ntawm kev lag luam.
