Hlau siab nkoj yog dav siv nyob rau hauv tshuaj, roj av, machinery, metallurgy, nuclear zog, aviation, aerospace thiab lwm yam departments, yog cov tub ntxhais ntawm cov txheej txheem tsim khoom tseem ceeb, lub siab lub nkoj feem ntau muaj lub tog raj kheej, lub taub hau, flange, sealing caij, qhib. thiab coj mus, kev coj tus kheej thiab lwm yam rau rau qhov loj ntim ntim ontology, raws li qhov yuav tsum tau muaj ntawm kev siv vuam vuam, tuaj yeem muab faib ua qib ABCD.
Scope ntawm daim ntawv thov | Kev faib cov welded pob qij txha ntawm lub ntsiab pressurized qhov chaw ntawm cov hlab ntsha | |||
Butt sib | Lap thiab kaum pob qij txha | |||
A | B | C | D | |
Steel welded ib txheej ntim ntim, ntau txheej ntim ntim, cov tsho kub thiab cov thawv forged vuam nrog tsim kub> -20 degree . Tsim qhov kub thiab txias tsawg dua lossis sib npaug rau -20 degree ntim, yuav tsum ua raws li GB150-C cov kev cai | Lub longitudinal pob qij txha ntawm lub tog raj kheej ib feem (tshwj tsis yog cov longitudinal pob qij txha ntawm ntau txheej packing thawv laminates), cov pob qij txha ncig ntawm lub taub hau kheej kheej thiab lub tog raj kheej, tag nrho cov pob qij txha nyob rau hauv ntau hom convex hau, thiab cov pob qij txha ntawm embedded. cov yeeb nkab thiab lub plhaub taub qab txuas. | Annular pob qij txha rau lub plhaub qhov chaw, cov pob qij txha rau tapered lub taub hau ntu txuas nrog nozzles, pob qij txha rau lub caj dab ntev flanges txuas nrog nozzles, tshwj tsis yog cov pob qij txha uas tau teev tseg raws li chav kawm A, C thiab D. | Pav ca, raj phaj thiab lub tog raj kheej tsis yog pob tw sib koom ua ke, flange thiab plhaub, cov yeeb nkab txuas txuas, sab hauv lub taub hau thiab lub tog raj kheej ncej puab thiab ntau txheej ntim ntim ntim laminate longitudinal sib koom. | Nozzles, manholes, flanges, reinforcement rings thiab lwm yam pob qij txha txuas nrog lub plhaub, tshwj tsis yog cov teev raws li chav kawm A thiab B. |
Nws tuaj yeem pom tias cov pob qij txha welded ntawm lub ntsiab compression ntawm lub thawv tau muab faib ua plaub pawg: A, B, C thiab D, raws li qhia hauv lub rooj.
a) Cov pob qij txha ntev ntawm lub tog raj kheej (tshwj tsis yog cov pob qij txha ntev ntawm lub laminate txheej ntawm ntau txheej ntim ntim), cov pob qij txha ncig ntawm lub taub hau kheej kheej txuas nrog lub tog raj kheej, txhua qhov sib cais-welded pob qij txha ntawm ntau hom convex taub hau, thiab cov pob qij txha ntawm lub pob tw kev sib txuas ntawm cov yeeb nkab thiab lub plhaub yog tag nrho cov chav kawm A welded pob qij txha.
b) Cov pob qij txha ntawm lub plhaub ib feem, cov pob qij txha txuas nrog qhov kawg me me ntawm lub taub hau conical thiab cov pob qij txha txuas nrog cov yeeb nkab, thiab cov pob qij txha txuas nrog lub caj dab ntev flange thiab cov yeeb nkab yuav tsum tag nrho rau hauv chav kawm B vuam pob qij txha, tshwj tsis yog cov uas twb tau teev tseg raws li chav kawm A, C thiab D vuam pob qij txha.
c) Cov pob qij txha uas tsis yog pob tw ntawm lub hau npog, lub raj phaj thiab lub tog raj kheej, cov pob qij txha ntawm flange thiab plhaub thiab cov yeeb nkab, lub puab tsaig pob qij txha ntawm lub taub hau thiab lub tog raj kheej, thiab cov pob qij txha ntev ntawm laminates ntawm ntau txheej ntim ntim yog tag nrho cov chav kawm C welded pob qij txha.
d) Cov pob qij txha txuas nrog lub plhaub, xws li nozzles, manholes, flanges thiab reinforcing rings, belongs rau chav kawm D welding pob qij txha, tshwj tsis yog cov uas twb tau teev tseg raws li chav kawm A thiab B vuam pob qij txha.
Nws raug nquahu kom siv submerged arc vuam, electrode arc vuam, argon arc vuam, lossis A ua ke ntawm lawv rau hom A thiab B pob qij txha. CO2 tuaj yeem siv rau lub taub qab vuam ntawm lub nozzle thiab flange.
Faj seeb: GAS welding feem ntau tsis tso cai rau cov kev xav tau siab.MANUAL GTIG SUBMERGED ARC WELDING tau pom zoo.
2.1 Arc pib thiab arc kaw
Yuav tsum nyob rau hauv lub arc los yog zawj nyob rau hauv lub arc, txwv tsis pub nyob rau hauv lub tsis-welding qhov chaw ntawm lub arc, vuam seam yuav tsum nyob rau hauv lub arc phaj arc, arc qhov yuav tsum tau sau.
2.2 Tiv thaiv arcs
Tsis txhob arcs ntawm av xaim, kab hluav taws xob, vuam tuav thiab vuam.
2.3 Polishing thiab kho vuam ntawm arc qhov
Lub arc qhov chaw ntawm arc scrape yuav tsum tau polished kom nws uniformly hloov mus rau saum npoo ntawm lub hauv paus khoom. Yog hais tias lub thickness ntawm lub hauv paus khoom tom qab sib tsoo yog tsawg tshaj li tus nqi teev, nws yuav tsum tau welded.
2.4 Fillet weld ntawm compression tivthaiv
Nws cov hauv paus hniav yuav tsum tau lav tias yuav tsum tau welded los ntawm, ko taw yuav tsum tau du.
2.5 Vuam hlau zog
Cov kab hluav taws xob ntawm txhua qhov hla yuav tsum tsis txhob siab tshaj qhov tsim nyog tus nqi.
2.6 vuam
Cov pob qij txha ntawm txhua qhov weld pass yuav tsum tau staggered kom deb li deb tau.
2.7 clear root
Ob-sided welding yuav tsum tau ntxuav lub hauv paus weld kom nthuav tawm pem hauv ntej nraub qaum vuam hlau. Rau kev vuam tsis siv neeg, yog tias qhov kev sim tuaj yeem lav qhov nkag mus, tsis tuaj yeem ua cov kev kho hauv paus.
2.8 Cov kev xav tau rau cov pob qij txha
Kev nkag mus thiab fusion yuav tsum tau ua kom ntseeg tau
2.9 Interlayer kub
Thaum lub sij hawm vuam txheej txheem, qhov kub ntawm cov khaubncaws sab nraud povtseg yuav tsum tsis txhob ntau tshaj qhov teev. Thaum lub vuam yog preheated, lub interlayer kub yuav tsum tau tswj kom tsis txhob qis dua qhov preheating kub.
2.10 Qhov yuav tsum tau muaj rau vuam cuam tshuam
Txhua qhov vuam yuav tsum tau welded kom deb li deb tau. Thaum lub vuam raug cuam tshuam, cov vuam qhov chaw rhiab rau cov kab nrib pleb txias yuav tsum tau ua kom sov tom qab cua sov thiab ua kom txias txias hauv lub sijhawm. Thaum rewelding, nws tseem yuav tsum tau preheat raws li kev cai.
2.11 Rauj txhawm rau txhim kho vuam zoo
Thaum nws tsim nyog siv rauj los txhim kho vuam zoo, vuam ntawm thawj txheej ntawm vuam thiab npog txheej yuav tsum tsis txhob hammered.
2.12 Tshem tawm ntawm arc pib phaj, arc xaus phaj thiab kuaj phaj
Lub arc pib phaj, arc xaus phaj thiab cov khoom siv vuam xeem phaj yuav tsum tsis txhob dismantled los ntawm rauj.
Sijhawm | Xyuas cov khoom tseem ceeb |
Ua ntej vuam | Base hlau, vuam khoom Vuam khoom, tam sim no, voltmeter Vuam zawj, sib koom ua ke thiab tu Welder kev tsim nyog Cov ntaub ntawv txheej txheem vuam |
Shi welding txheej txheem | Vuam specification parameter Ua cov txheej txheem vuam Kev ua raws li cov qauv txheej txheem Kev ua raws li qhov xav tau ntawm kev kos duab |
Tom qab vuam | Cov ntaub ntawv vuam tiag tiag Cov tsos thiab qhov loj ntawm welded sib koom Tom qab cua sov, tom qab vuam cua sov kho Khoom siv vuam xeem phaj Kev kuaj tsis raug Tiv thaiv qhov ntsuas hluav taws xob Test rau compactness |
3.1 Cov tsos zoo ntawm vuam
3.1.1 Lub ntsej muag, cov duab thiab qhov loj ntawm cov vuam yuav tsum ua raws li cov qauv kev tsim qauv thiab cov qauv tsim, thiab qhov saum npoo yuav tsum tsis txhob muaj kab nrib pleb, qhov pores, arc pits thiab spatter.
3.1.2 Class C thiab D welds yuav tsum muaj kev hloov pauv nrog lub hauv paus hlau. Qhov twg daim duab tsis qhia qhov siab ntawm lub solder, lub thickness ntawm lub thinner ib feem ntawm lub solder yog npaum li cas. Rau lub nplhaib pin ntawm lub nplhaib reinforcing, thaum lub nplhaib txhawb zog ntau dua los yog sib npaug rau 8 hli, tus pin solder yog sib npaug li 70 feem pua ntawm cov thickness ntawm lub nplhaib reinforcing, thiab tsis tsawg tshaj li 8 hli.
3.1.3 Rau cov hlau uas muaj cov qauv tensile lub zog σb> 540MPa, ntim ua los ntawm austenitic stainless hlau, cryogenic ntim, spherical tanks thiab ntim nrog ib tug welded coefficient ntawm 1.0, welded sib koom nto yuav tsum tsis muaj qhov tom. Qhov tob ntawm cov npoo ntawm qhov sib txuas ntawm cov khoom sib txuas ntawm cov thawv uas tsis yog cov saum toj no yuav tsum tsis txhob ntau tshaj 0.5 hli, qhov ntev ntawm cov npoo yuav tsum tsis txhob ntau tshaj 100 hli, thiab tag nrho ntev ntawm cov npoo ntawm ob sab. welded pob qij txha yuav tsum tsis pub tshaj 10 feem pua ntawm qhov ntev ntawm cov pob qij txha welded.
3.1.4 Residual qhov siab ntawm Class A thiab B welded pob qij txha Qhov siab ntawm chav kawm A thiab B welds yuav tsum tsis txhob siab tshaj 10 feem pua ntawm cov weldment thickness thiab yuav tsum tsis txhob ntau tshaj 3 hli. Qhov dav ntawm chav kawm A thiab B welded pob qij txha feem ntau yog 1-2mm dav dua qhov dav ntawm txhua sab ntawm qhov zawj.
