Wb tham txogLSAW welded yeeb nkab. Lub npe nws tus kheej -Longitudinally Submerged Arc Welded- qhia koj ob yam tseem ceeb tshaj plaws txog nws: lub seam khiav lengthwise, thiab cov txheej txheem vuam yog submerged arc. Dab tsi ntxiv rau yog cov khoom tsim rau kev ua haujlwm hnyav. Txoj kab uas hla loj, cov phab ntsa tuab, siab siab -qhov no yog cov yeeb nkab uas nqa cov roj hla cov suab puam, cov pa roj hauv qab dej hiav txwv, thiab dej mus rau hauv cov nroog loj hlob.
Dab tsi ua rau nws txawv?
Cov txheej txheem tsim khoom pib nrog ib lub phaj steel - tsis yog ib daim kab xev, tab sis ib lub tiaj tiaj, hnyav phaj. Cov phaj no ces nias los yog dov rau hauv ib lub cylindrical zoo, nrog rau ob lub npoo welded ua ke raws ib qho ncaj seam. Cov seam no ua haujlwm raws li cov yeeb nkab tsuas yog longitudinal sib koom ua ke, uas muaj qhov muaj txiaj ntsig zoo hauv thaj tsam ntawm cov kav loj - txoj kab uas hla los ntawm kev txo qis cov ntsiab lus tsis muaj zog.
Lub submerged arc vuam txheej txheem siv ib tug nruam hlau electrode thiab ib tug granular flux uas tag nrho cov weld pas dej ua ke. Qhov no tiv thaiv cov weld los ntawm atmospheric paug thiab ua kom tob tob nrog zoo heev mechanical zog. Nws yog tus txheej txheem uas muab kev ntseeg siab -ib txwm, rov ua dua, thiab tshuaj xyuas.
Qhov ntau thiab tsawg
LSAW yeeb nkab feem ntau yog tsim nyob rau hauv sab nraud diameters li ntawm 406 hli (16 nti) mus txog 1,422 hli (56 nti) los yog loj dua. Phab ntsa thickness feem ntau spans ntawm 6 hli mus rau 50 hli, nyob ntawm seb cov kev cai tshwj xeeb ntawm daim ntawv thov. Qhov loj ntawm txoj kab uas hla thiab cov phab ntsa tuab, qhov xav tau ntau dua ntawm kev tsim khoom.
Qhov ntev yog feem ntau muab rau hauv ib qho ntev ntawm 5 txog 12 meters, txawm hais tias qhov tseeb tshwj xeeb nyob ntawm tus neeg tsim khoom lub peev xwm thiab qhov kawg - cov neeg siv xav tau. Rau qee qhov siab - thov kev thov, qhov ntev kev cai yuav raug teev tseg.
Qib khoom
Cov hlau siv rauLSAW tubfeem ntau yog carbon lossis qis- alloy steel, xaiv rau lub zog, weldability, thiab toughness. Cov qib uas muaj xws li:
API 5L: Tus qauv ua rau kab yeeb nkab. Qib ntau ntawm X42 txog X80 thiab dhau mus, nrog kev nce qib zog rau siab dua - cov ntawv thov siab.
ASTM A53 / A106: Feem ntau teev rau cov kev pabcuam dav dav hauv cov chaw tsim hluav taws xob thiab cov chaw tsim khoom.
TS EN 10225: Cov qauv European rau cov khoom siv vuam siv tau siv hauv kev siv sab nrauv
Shipbuilding thiab structural qib: Rau kev siv nyob rau hauv marine ib puag ncig thiab hnyav kev tsim kho, qhov loj qhov tseeb thiab weld zoo yog qhov tseem ceeb.
Cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab tau ua tib zoo tswj xyuas kom muaj zog ntawm qhov kub thiab txias, tiv thaiv hydrogen -induced cracking, thiab zoo ib yam weldability.
Cov ntawv thov tseem ceeb
LSAW yeeb nkab yog qhov kev xaiv thaum cov ceg txheem ntseeg siab:
Roj thiab Roj Kis: Ntev- cov kav dej nyob deb thauj cov roj av, roj av, thiab cov khoom ua kom zoo.
Offshore Pipelines: Subsea installation qhov twg tsis ua hauj lwm tsis yog ib qho kev xaiv.
Kev xa dej: Cov dej loj loj - nplai dej thiab cov kav dej.
Kev siv cov qauv: Piling thiab lub hauv paus ua haujlwm rau cov txuas hniav, cov chaw nres nkoj, thiab cov ntug dej hiav txwv.
Kev Tsim Hluav Taws Xob: Cov dej txias hauv Circuit Court thiab chav tshuab hauv thermal thiab nuclear fais fab nroj tsuag.
Vim li cas thiaj xaiv LSAW dua lwm hom yeeb nkab?
Piv rau SSAW (kauv submerged arc welded) yeeb nkab, LSAW tsuas muaj ib txoj hlua ntev. Qhov ntawd txhais tau tias tsawg dua welded cheeb tsam-thiab tsawg dua qhov chaw rau qhov tsis xws luag los nkaum. Nyob rau hauv cov nqe lus tshuaj xyuas, ib leeg seam yog yooj yim dua los soj ntsuam thiab kuaj tag nrho. Nws tseem tsim nyog sau cia tias LSAW kev tsim khoom tso cai rau kev tswj kom zoo dua ntawm qhov ncaj thiab qhov sib xws, uas tuaj yeem yog qhov tseem ceeb hauv kev teeb tsa cov kav dej thiab tso tawm sab nraud.
Piv rau seamless yeeb nkab, LSAW muaj ntau yam diameters thiab phab ntsa thicknesses ntawm tus nqi pheej yig dua. Rau cov ntawv thov uas xav tau qhov ntau thiab tsawg uas seamless ntau lawm tsis tuaj yeem xa, LSAW yog lwm txoj hauv kev.
Kev Tswj Xyuas Zoo thiab Kev Xeem
Muab qhov tseem ceeb ntawm cov ntawv thov, kev tswj kom zooLSAW tubyog nruj. Standard xeem muaj xws li:
Kev Ntsuas Ultrasonic: Rau kev kuaj xyuas qhov tsis xws luag ntawm laminar thiab txheeb xyuas qhov tseeb ntawm qhov vuam.
Kev Ntsuas Radiographic: Rau kev tshuaj xyuas cov vuam zoo.
Kev Ntsuas Hydrostatic: Ua kom cov yeeb nkab tuaj yeem tiv taus qhov kev khiav hauj lwm siab yam tsis muaj dej.
Mechanical Testing: Kom paub meej tias lub zog tensile, yield zog, thiab cuam tshuam toughness.
Ua haujlwm raws li cov txheej txheem zoo tau lees paub rau ISO 9001, API Q1, lossis cov qauv sib piv. Traceability-muaj peev xwm taug qab txhua cov yeeb nkab los ntawm steel phaj mus txog rau qhov kawg xa khoom- yog qhov yuav tsum tau ua.
Hauv luv
LSAW welded yeeb nkab yog ib qho hnyav -cov khoom siv hlau tsim los rau kev thov. Nws yog tsim los ntawm phaj es tsis yog coil. Cov txheej txheem vuam siv ib leeg ncaj seam nrog submerged arc thev naus laus zis, tsim kom muaj kev sib koom ua ke uas tuaj yeem kuaj xyuas thiab ntseeg tau. Nws yog cov yeeb nkab uas koj qhia thaum koj xav tau cov kab loj loj, cov phab ntsa tuab, siab siab, thiab ntev - lub sij hawm cia siab. Tsis yog cov khoom lag luam zoo nkauj tshaj plaws hauv ntiaj teb cov yeeb nkab-tab sis yeej yog ib qho tseem ceeb tshaj plaws.
