Tom ntej: Yuav Ua Li Cas Welding Damages Coatings
Vuam carbon steel yeeb nkab ua kom kub siab tshaj 1500 degrees Celsius ntawm arc thiab ntau pua degrees hauv cov hlau ib puag ncig. Organic coatings xws li fusion-bonded epoxy, peb- txheej polyethylene, thiab polypropylene tsis tuaj yeem nyob qhov cua sov no: lawv char, blister, delaminate, los yog soften nyob rau hauv ib cheeb tsam ib ncig ntawm lub weld. Sparks thiab slag los ntawm weld kuj hlawv thiab qhov chaw nyob ze txheej. Vim tias cov txheej txheem yog qhov tseem ceeb tiv thaiv corrosion ntawm faus thiab submerged yeeb nkab, kev puas tsuaj ntawm txhua qhov sib koom ua ke tsim cov saw hlau ntawm cov ntsiab lus tsis muaj zog uas tiv thaiv cathodic yuav tsum npog. Kev tiv thaiv qhov kev puas tsuaj no yog qhov teeb meem zoo hauv cheeb tsam uas txiav txim siab txog qhov ntev - lub sij hawm ncaj ncees ntawm cov kav dej.
Kev Npaj Ua Ntej Vuam
Thawj qhov kev tiv thaiv yog kev npaj. Txhais thaj tsam tshem tawm txheej txheej, feem ntau 100 mus rau 150 hli los ntawm qhov sib txuas ntawm qhov nruab nrab ntawm txhua sab, thiab strip lub txheej nyob rau ntawd ua ntej vuam. Rau lub Hoobkas-coated yeeb nkab, qhov kawg yog muab los ntawm liab qab lossis nrog cov txheej txheem tshem tau kawg vim li no. Teem caij lub vuam thiab txheej txheej ua ub ua no kom cov liab qab xaus tsis muaj kev tiv thaiv nyob rau hauv ntub dej los yog corrosive tej yam kev mob rau lub sij hawm ntev. Npaj thaj chaw ua haujlwm nrog hluav taws kub- cov pam vov tiv thaiv kom ntes cov nplaim taws, thiab tso cov yeeb nkab kom cov nplaim taws sib tsoo tsis cuam tshuam rau cov txheej txheem tsis zoo.
Thaum tshav kub kub tswj thaum vuam
Txwv cov cua kub nkag thiab lub sijhawm ntawm qhov kub siab. Siv qhov tsawg kawg nkaus weld kis tau raws li tus txheej txheem, tsis txhob overheat preheat tshaj qhov teev ntau yam, thiab txias qhov sib koom ua ke tsis yog quenching. Rau tuab- cov yeeb nkab phab ntsa, xav txog ntau- hla vuam nrog kev tswj qhov ntsuas kub. Qhov twg cov txheej yog nyob ze ntawm lub vuam, cov ntaub thaiv npog cua sov thiab cov ntaub ntub dej, qhov twg tso cai los ntawm cov txheej txheem, tuaj yeem tiv thaiv txheej txheej txheej, tab sis txoj kev txhim khu kev qha yog tsim cov cheeb tsam liab qab thiab khaws tag nrho cov cua sov hauv nws.
Txheej Tshem Tawm thiab Kev Npaj Nto
Tshem tawm cov txheej txheem los ntawm kev sib tsoo los yog siv cov cuab yeej tshem tawm, txiav rov qab mus rau lub suab txheej nrog lub npoo tapered kom cov txheej txheej txheej plaub du du rau hauv cov txheej txheem tsis zoo. Ntxuav cov hlau liab qab mus rau qhov yuav tsum tau ua kom tiav, feem ntau nyob ze ntawm - dawb moj tej tawg los yog lub hwj chim- cuab yeej ntxuav nrog ib tug roughness, thiab ua kom lub cheeb tsam qhuav thiab tsis muaj roj thiab hmoov av. Lub weld nws tus kheej yuav tsum yog hauv av du, thiab ib qho spatter tshem tawm, ua ntej kho txheej yog thov.
Field Repair Systems
Tom qab vuam thiab tshuaj xyuas, rov ua dua txheej txheej nrog kev pom zoo. Cov kev xaiv feem ntau yog cua sov- lub tes tsho ntsws, uas qhwv qhov sib koom ua ke thiab ntsws mus rau cov niam txiv txheej txheej nrog cov nplaum nplaum, thiab cov kua epoxy los yog ob- cov khoom siv polyurethane kho cov khoom siv rau ntawm qhov chaw npaj. Rau peb -txheej txheej txheej txheem, sib xws teb- cov tshuab siv tau teev tseg los ntawm cov chaw tsim khoom txheej. Qhov chaw kho yog tom qab hnub so raug kuaj nrog qhov qis -voltage lossis siab -voltage detector kom paub meej tias tsis muaj pinholes, thiab cov txheej tuab yog txheeb xyuas raws li qhov tshwj xeeb.
Kev tshuaj xyuas thiab cov ntaub ntawv
Tshawb xyuas txhua qhov sib koom ua ke ua ntej backfilling: kev kuaj pom ntawm kev kho, kev tshawb nrhiav hnub so dhau ntawm tag nrho cov voj voog, kev kuaj adhesion ntawm cov txheej kho, thiab ntsuas thickness. Sau cov txiaj ntsig nrog cov ntaub ntawv weld thiab cov xov tooj cua sov kom cov txheej txheem yav tom ntej tuaj yeem taug qab. Cov ntaub ntawv no yog ib feem ntawm kev tswj xyuas kev ncaj ncees ntawm cov kav dej thiab yuav tsum tau ua los ntawm feem ntau cov kav dej thiab cov cai.
Cov lus nug nquag
Cov qauv siv tau yog nyob ntawm cov khoom thiab kev pabcuam: API 5L rau kab yeeb nkab, ASTM A53 thiab A106 rau carbon steel yeeb nkab, ASTM A312 thiab A213 rau stainless hlau, thiab ASME B16 series rau qhov ntev thiab fittings; qhov kev txiav txim yuav tsum npe tus qauv thiab nws tsab.
Qhov ntau thiab tsawg los ntawm qhov me me mus rau txoj kab uas hla loj rau cov qauv khoom, nrog cov phab ntsa tuab qhia nyob rau hauv cov sij hawm los ntawm SCH10 txog XXS los yog hauv millimeters; qhov kev txiav txim hais txog cov kab sab nraud, phab ntsa thickness thiab ntev.
Cov qib carbon steel xws li API 5L B txog X70 thiab ASTM A106 B, alloy steels, thiab stainless qib xws li 304/304L, 316/316L thiab duplex muaj, txhua tus xa nrog cov ntawv pov thawj chemistry thiab cov khoom siv tshuab.
Txhua qhov ntau yog kuaj rau cov tshuaj lom neeg muaj pes tsawg leeg, cov khoom siv kho tshuab, qhov ntev thiab siab ncaj ncees, nrog rau kev sim hydrostatic thiab tsis yog -kev kuaj xyuas kev puas tsuaj raws li tus qauv, thiab daim ntawv pov thawj cov ntaub ntawv pov thawj.
Dub pleev xim rau, varnished, oiled, galvanized los yog coated nto yog muaj, nrog dawb, beveled los yog threaded xaus; yas caps thiab steel kawg tiv thaiv cov yeeb nkab thaum thauj.
Khaws cov skids tawm hauv av nrog qhov kawg tiv thaiv, kom nws qhuav thiab deb ntawm cov hlau tsis sib xws, thiab nqa cov pob khoom nrog cov hlua ntawm cov ntsiab lus nqa nqa kom tsis txhob muaj kev puas tsuaj.
