Cov kev cai rau kev ncaj seam welded kav: Cov kev cai thiab kev soj ntsuam ntawm cov kav hlau ncaj seam welded yog raws li GB3092 "Welded Steel Pipes for Low-Pressure Fluid Transport" standard. Lub nominal txoj kab uas hla ntawm welded yeeb nkab yog 6 ~ 150 hli, lub nominal phab ntsa thickness yog 2.0 ~ 6.0 hli, thiab qhov ntev ntawm cov welded yeeb nkab yog feem ntau 4 ~ 10 meters, nws yuav raug xa los ntawm lub Hoobkas nyob rau hauv tas mus li ntev los yog ntau lengths. Qhov saum npoo ntawm cov yeeb nkab steel yuav tsum du, thiab qhov tsis xws luag xws li folding, tawg, delamination, thiab lap welding tsis raug tso cai. Qhov saum npoo ntawm cov yeeb nkab steel tau tso cai kom muaj qhov tsis xws luag xws li khawb, khawb, vuam dislocations, kub hnyiab, thiab nti uas tsis pub dhau qhov tsis zoo sib txawv ntawm phab ntsa tuab. Thickening ntawm phab ntsa thickness ntawm lub weld thiab muaj nyob rau hauv lub weld tuav yog tso cai. Welded steel kav yuav tsum tau ua raws li kev ntsuas kev ua tau zoo, kev ntsuas kev sib tw, thiab kev nthuav dav, thiab yuav tsum ua kom tau raws li qhov yuav tsum tau teev tseg hauv tus qauv. Cov yeeb nkab steel yuav tsum muaj peev xwm tiv taus lub siab sab hauv ntawm 2.5Mpa thiab tswj tsis txhob xau rau ib feeb. Nws raug tso cai siv eddy tam sim no flaw nrhiav kom tau txoj kev es tsis txhob ntawm cov hydrostatic test. Eddy tam sim no tsis pom kev yog ua los ntawm tus qauv GB7735 "Eddy Tam sim no Flaw Detection Inspection Method for Steel Pipes". Txoj kev tshawb nrhiav qhov tsis txaus ntseeg tam sim no yog txhawm rau txhim kho qhov kev sojntsuam ntawm tus ncej, khaws qhov deb ntawm 3 ~ 5 hli ntawm qhov kev kuaj pom qhov tsis zoo thiab qhov vuam, thiab tso siab rau kev txav ceev ntawm cov yeeb nkab steel los ua qhov kev soj ntsuam ntawm cov vuam. Lub teeb pom kev tsis txaus ntseeg tau ua tiav thiab txiav txim siab los ntawm eddy tam sim no flaw detector. Yuav kom ua tiav lub hom phiaj ntawm qhov tsis pom kev. Tom qab kuaj pom qhov tsis zoo, cov yeeb nkab welded raug txiav mus rau qhov ntev ntev nrog lub dav hlau pom thiab tau dov tawm ntawm cov kab ntau lawm ntawm lub flip ncej. Ob qhov kawg ntawm cov yeeb nkab steel yuav tsum yog tiaj-chamfered thiab cim, thiab cov kav dej tiav yuav tsum tau ntim rau hauv hexagonal bundles ua ntej tawm hauv lub Hoobkas.

Ncaj seam steel yeeb nkab ua txoj kev: Ncaj seam steel yeeb nkab yog cov yeeb nkab steel uas nws cov vuam seam yog sib npaug mus rau qhov ntev ntawm cov yeeb nkab steel. Lub zog ntawm cov yeeb nkab steel feem ntau yog siab tshaj qhov ncaj seam welded yeeb nkab. Nws tuaj yeem siv cov ntawv nqaim nqaim los tsim cov kav dej loj dua, thiab tseem tuaj yeem siv cov pob zeb ntawm tib qhov dav los tsim cov yeeb nkab diameters. Txawv welded kav. Txawm li cas los xij, piv nrog cov kav dej ncaj nraim ntawm tib qhov ntev, qhov ntev ntawm qhov vuam yog nce los ntawm 30 ~ 100%, thiab qhov ceev ntau lawm yog qis dua. Yog li dab tsi yog nws txoj kev ua haujlwm?

1. Forging steel: Ib txoj kev ua haujlwm siab uas siv cov kev cuam tshuam ntawm lub forging rauj lossis lub siab ntawm cov xovxwm los hloov qhov khoob rau hauv cov duab thiab qhov loj me uas peb xav tau.
2. Extrusion: Nws yog ib txoj kev ua hlau uas cov hlau muab tso rau hauv lub tog raj kheej kaw extrusion thiab lub siab yog siv rau ntawm ib kawg kom extrude cov hlau los ntawm ib lub qhov chaw tuag kom tau txais cov khoom tiav ntawm tib cov duab thiab loj. Nws feem ntau yog siv rau kev tsim cov hlau tsis muaj hlau. Khoom siv hlau.
3. Rolling: Ib txoj kev ua haujlwm siab uas cov hlau tsis muaj hlau hla dhau qhov sib txawv (ntawm ntau cov duab) ntawm ib khub rotating rollers. Vim yog compression ntawm cov menyuam, cov khoom seem yog txo thiab qhov ntev yog nce.
4. Kev kos duab hlau: Nws yog ib txoj kev ua haujlwm uas rub cov hlau dov tawm (zoo li tus, raj, cov khoom, thiab lwm yam) los ntawm qhov tuag qhov kom txo tau qhov kev sib tw thiab ua kom ntev. Lawv feem ntau yog siv rau kev ua kom txias.