Dab tsi SSAW Pipe yog thiab qhov twg S355JR haum
Kauv submerged arc welding (SSAW) yog txheej txheem uas tsim cov yeeb nkab los ntawm ib qho txuas txuas ntxiv ntawm kub -khoov hlau los ntawm kev khoov nws mus rau hauv lub helix, yog li cov weld seam khiav hauv ib ncig ntawm cov yeeb nkab es tsis txhob ntawm ib txoj kab ncaj nraim. Lub seam yog welded los ntawm ob sab hauv thiab sab nraud siv submerged arc vuam, uas muab kev nkag mus tob thiab huv, zoo - zoo li cov hlaws weld. SSAW yog txoj kev pheej yig tshaj plaws los tsim cov loj- txoj kab uas hla welded yeeb nkab, feem ntau yog li ntawm 20 ntiv tes (508 mm) mus txog 100 ntiv tes (2540 mm) lossis ntau dua, vim tias ib txoj kab dav dav tuaj yeem tsim ua ntau txoj kab uas hla los ntawm kev hloov lub kaum sab xis.
S355JR yog qib steel qauv uas tau teev tseg hauv EN 10025-2. S txhais tau hais tias cov qauv hlau, 355 yog qhov tsawg kawg nkaus tawm lub zog ntawm 355 MPa rau thicknesses txog 16 hli, J qhia txog qhov tsawg kawg nkaus Charpy cuam tshuam lub zog ntawm 27 J, thiab R yog cov chav kawm zoo nrog rau kev ntsuam xyuas ntawm chav tsev kub (20 degrees Celsius). Nws yog ib qho weldable, cov qauv txheej txheem dav dav, thiab thaum nws siv rau welded yeeb nkab, cov yeeb nkab nws tus kheej yog ib txwm muab rau cov khoom siv yeeb nkab xws li EN 10219 rau txias- tsim cov qauv hollow seem lossis rau qhov project specifications rau piling thiab dej conveyance. S355JR SSAW yeeb nkab yog cov khoom lag luam, tsis yog qhov siab - cov kav dej siab: rau cov pa roj qaub lossis cov kev pabcuam siab kis tau tus mob tus neeg yuav khoom yuav tsum tau qhia API 5L lossis EN 10217 qib siab hloov.
Kauj Ruam 1: Kev Tshuaj Ntsuam Xyuas thiab Kev Npaj
Kev tsim khoom pib nrog kub- dov steel sawb lossis phaj ntawm qib uas tau teev tseg, ib txwm muab nrog daim ntawv pov thawj zeb lees paub EN 10025-2 chemistry thiab cov khoom siv tshuab. Lub sawb yog uncoiled thiab noj los ntawm ib tug straightening thiab leveling sawv ntsug kom tshem tawm coil teem thiab flatten cov khoom. Kev tshuaj xyuas saum npoo yog ua los txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm, nws yuav tsum tau txiav cov txiav. Cov npoo npoo yog ces milled mus rau ib tug meej dav thiab ib tug beveled ntug profile. Lub bevel geometry tseem ceeb: nws yuav tsum tso cai rau tag nrho cov weld nkag mus rau sab hauv thiab sab nraud yam tsis tau tawm ntawm qhov tsis muaj -of-fusion zone nyob rau hauv nruab nrab ntawm phab ntsa.
Kauj Ruam 2: Kauv Forming
Cov sawb npaj nkag mus rau hauv qhov chaw tsim khoom ntawm lub kaum sab xis tswj hwm ntawm cov yeeb nkab axis. Lub kaum sab xis, ua ke nrog txoj kab dav dav, teeb tsa txoj kab uas hla ntawm cov yeeb nkab: lub kaum sab xis ua rau lub taub me me, thiab lub kaum sab xis ua rau qhov loj dua. Lub sawb yog coj los ntawm peb - yob los yog lub tawb tsim cov cuab yeej uas khoov nws mus rau hauv lub helix txuas ntxiv yam tsis muaj buckling cov npoo. Lub kaum sab xis kuj txiav txim siab lub kaum sab xis ntawm lub vuam seam, thiab nws tau tuav nyob rau hauv nruj txwv vim nws ncaj qha cuam tshuam rau lub roundness ntawm cov yeeb nkab tiav thiab qhov haum - txog ntawm seam npoo. Cov kab SSAW niaj hnub no khiav cov chaw tsim khoom ntawm qhov ceev ceev synchronized nrog lub vuam chaw nres tsheb, yog li qhov sib txawv ntawm seam nyob twj ywm nyob rau hauv tag nrho ntev.
Kauj Ruam 3: Submerged Arc Vuam sab hauv thiab sab nraud
Vuam yog ua nrog submerged arc vuam, nyob rau hauv uas lub arc hlawv hauv qab ib daim pam ntawm granular flux. Lub flux shields lub molten weld hlau los ntawm huab cua, thiab nws yog tsis tu ncua pub ua ntej ntawm lub arc thiab zoo rov qab nws. Sab hauv weld hlaws yog tso ua ntej, tom qab ntawd los ntawm cov hlaws sab nraud, yog li ob lub hlaws sib tshooj nyob rau hauv nruab nrab ntawm phab ntsa tuab thiab tsim kom muaj tag nrho -kev sib koom ua ke. Vuam tsis, nrog rau tam sim no, voltage, mus ncig teb chaws ceev, thiab cov electrode hlau qib, yog teem rau lub strip thickness thiab raug soj ntsuam tas li. Cov hlau feem ntau yog cov pa roj carbon -manganese muab tub lim xws li qib sib piv S355JR lub zog, thiab hom flux yog xaiv rau qhov yuav tsum tau muaj zog.
Kauj Ruam 4: Qhov loj me, txiav, thiab ua tiav tiav
Tom qab cov vuam txias, cov yeeb nkab txuas ntxiv raug txiav kom ntev, feem ntau 6 mus rau 12 meters, nrog rau kev txiav ya - tawm saw lossis teeb taws. Cov yeeb nkab ces dhau los ntawm qhov loj me uas kho cov kab thiab ovality. Cov yeeb nkab kawg yog tiav raws li qhov kev txiav txim: square txiav, los yog beveled rau vuam nrog lub bevel kaum sab xis thiab lub hauv paus ntsej muag teev los ntawm qhov project. Kev ua tiav kawg kuj suav nrog kev deburring thiab, qhov twg yuav tsum tau, chamfering sab nraud los tiv thaiv bevel thaum tuav. Cov kav dej raug cim nrog qib, tus qauv, tus lej xov tooj cua sov, tus naj npawb ntawm cov yeeb nkab, qhov ntev, thiab kev txheeb xyuas zeb ua ntej lawv txav mus rau qhov kev sim.
Kauj Ruam 5: Kev Tshawb Fawb thiab Kev Ntsuas
Kev ruaj ntseg zoo ntawm S355JR SSAW yeeb nkab ua raws li cov phiaj xwm ntsuas, feem ntau pom zoo ntawm zeb thiab cov neeg yuav khoom. Cov kev kuaj xyuas ib txwm muaj cov hauv qab no:
| Kuaj | Lub hom phiaj |
|---|---|
| Ultrasonic kuaj ntawm vuam | Txheeb xyuas qhov tsis xws luag xws li tsis muaj fusion, porosity, thiab slag inclusions raws tag nrho cov kauv seam |
| Kev kuaj hluav taws xob | Lwm txoj kev los yog ntxiv volumetric kuaj ntawm weld seam |
| Hydrostatic xeem | Paub meej tias cov yeeb nkab tuaj yeem tuav qhov ntsuas qhov ntsuas siab yam tsis muaj qhov to lossis pom qhov txawv txav |
| Dimensional soj ntsuam | Xyuas sab nraud txoj kab uas hla, phab ntsa thickness, ntev, ncaj, thiab kawg squareness |
| Tensile thiab flattening xeem | Paub meej tias cov khoom siv hauv paus thiab weld ua tau raws li qhov yuav tsum tau muaj zog |
| Charpy impact test | Txheeb xyuas qhov tshwj xeeb toughness ntawm cov khoom siv hauv paus thiab, qhov xav tau, qhov vuam |
Kev ntsuam xyuas hydrostatic yog ua los ntawm lub siab xam los ntawm cov yeeb nkab qhov ntev thiab cov kev ntxhov siab fiber ntau, thiab qhov kev ntsuas siab tau tuav ntev txaus kom paub meej tias kev ruaj ntseg. Cov ntaub ntawv xeem tau muab tso ua ke rau hauv daim ntawv pov thawj cov khoom siv uas nrog rau txhua qhov kev xa khoom.
Kauj Ruam 6: Txheej thiab Marking
Nyob ntawm qhov kev txiav txim, cov yeeb nkab tiav yog xa tawm liab qab lossis muab cov txheej tiv thaiv. Cov kev xaiv muaj xws li lub tsho tiv no rau kev tiv thaiv corrosion ib ntus, fusion- khi epoxy lossis peb - txheej polyethylene rau faus kev pabcuam, thiab cov cement mortar hauv ob sab phlu rau kev xa dej. Daim ntawv thov txheej yog ua raws li kev tshawb nrhiav hnub so kom pom cov pinholes hauv zaj duab xis txheej. Kev cim zaum kawg rov hais dua qhov tseem ceeb ntawm txhua cov yeeb nkab, thiab cov kav dej tau ntim nrog lub hau tiv thaiv kawg lossis bevel tiv thaiv ua ntej thauj khoom.
Vim li cas thiaj xaiv S355JR rau Cov Yeeb Nkab Welded
S355JR muaj kev sib xyaw ua ke muaj txiaj ntsig zoo rau kev siv cov qauv: 355 MPa yam tsawg kawg nkaus lub zog, weldability zoo nrog cov txheej txheem txheej txheem, thiab ib qhov dej - tsim cov saw hlau rau sawb thiab phaj hauv feem ntau cov khw. Nws yog feem ntau teev rau cov yeeb nkab pawg, pawg hauv paus, kev xa dej, cov kab slurry, thiab cov tswv cuab ntawm cov qauv uas cov yeeb nkab ua raws li cov khoom thauj -cov kabmob. Nws qhov kev cuam tshuam yuav tsum yog me me (27 J ntawm 20 degrees Celsius), yog li rau cov huab cua txias lossis cov qauv dynamically loaded tus tsim yuav tsum xav txog qhov qis dua - kub qib S355J0 (0 degrees Celsius) los yog S355J2 (-20 degrees Celsius) los ntawm tib tus qauv.
FAQ
S355JR txhais li cas hauv EN 10025-2?
S stands rau structural steel, 355 yog qhov tsawg kawg nkaus yield zog ntawm 355 MPa rau thicknesses mus txog 16 hli, J qhia ib tug yam tsawg kawg nkaus Charpy cuam tshuam lub zog ntawm 27 J, thiab R yog cov qib zoo nrog rau cov kev ntsuam xyuas nyob rau hauv chav tsev kub, 20 degrees Celsius.
Puas yog S355JR SSAW yeeb nkab haum rau siab - cov kav dej siab?
Tsis ib txwm. S355JR yog qib kev tsim qauv, thiab nws cov kev txwv nruj thiab chemistry tau teeb tsa rau kev tsim vaj tsev thiab kev tsim vaj tsev, tsis yog rau kev sib kis hydrocarbon. Siab - Cov kab yeeb nkab siab yuav tsum tau teev tseg rau API 5L lossis rau EN 10217 cov qauv siab raj, uas muaj cov tshuaj lom neeg nruj dua, yuav tsum muaj zog, thiab NDE cov cai.
Vim li cas lub vuam yog tsim los ntawm ob sab hauv thiab sab nraud?
Cov hlaws sab hauv thiab sab nraud hlaws sib tshooj hauv nruab nrab ntawm phab ntsa tuab, yog li qhov sib koom ua tiav tag nrho nkag mus. Ib qho -sab weld ntawm cov khoom tuab yuav tawm hauv cov hauv paus hniav uas tsis muaj kev cuam tshuam uas ua raws li qhov chaw pib tawg. Vuam ob sab yog cov qauv kev coj ua rau SSAW yeeb nkab tshaj li 8 hli phab ntsa.
Dab tsi ntawm txoj kab uas hla SSAW yeeb nkab npog?
SSAW feem ntau yog siv rau cov kab loj loj, feem ntau los ntawm 20 ntiv tes (508 hli) nce mus, nrog qee cov kab uas ua rau 16 ntiv tes thiab mus txog 100 ntiv tes lossis ntau dua. Hauv qab no, ERW lossis HFI welded yeeb nkab feem ntau yog kev lag luam ntau dua, thiab rau qhov loj tshaj plaws txoj kab uas hla LSAW (longitudinal submerged arc vuam) sib tw ncaj qha nrog SSAW nyob ntawm qhov ntev yuav tsum tau thiab seam orientation nyiam.
Txoj kab uas hla ntawm cov yeeb nkab hloov li cas ntawm SSAW kab?
Los ntawm kev hloov lub sawb dav los yog lub kaum sab xis, los yog ob qho tib si. Txoj kab uas hla tsim yog ib txoj haujlwm ntawm txoj kab dav dav faib los ntawm lub kaum sab xis helix. Hloov lub kaum sab xis ntawm ib txoj kab pub rau lub zeb tsim ntau yam diameters los ntawm tib lub sawb dav, uas yog ib qho ntawm cov nqi tseem ceeb ntawm cov txheej txheem kauv.
Daim ntawv pov thawj dab tsi yuav tsum tuaj nrog S355JR SSAW yeeb nkab?
Kev xa tawm tus qauv suav nrog daim ntawv pov thawj zeb nrog tus lej xov tooj cua sov, tshuaj lom neeg muaj pes tsawg leeg, tensile thiab cuam tshuam cov txiaj ntsig, thiab cov txiaj ntsig kev ntsuas qhov ntev, feem ntau yog xa tawm raws li EN 10204 2.2 lossis 3.1 daim ntawv. Rau cov qauv tsim nrog rau thib peb- tog tshuaj ntsuam xyuas, yuav tsum muaj daim ntawv pov thawj 3.1 lossis 3.2 thiab NDE cov ntawv ceeb toom.
