Ib txoj kab loj-ntev longitudinally welded yeeb nkab yog ib lo lus dav dav. Nws yog tsim los ntawm steel sawb. Cov kav dej uas tau welded los ntawm high-frequency welding khoom yog hu ua longitudinally welded kav. (Lub npe tau muab vim tias cov welds ntawm cov yeeb nkab steel yog nyob rau hauv txoj kab ncaj nraim). Ntawm lawv, raws li lub hom phiaj sib txawv, muaj cov txheej txheem rov qab sib txawv. (Raws li muab faib ua Scaffolding yeeb nkab, kua yeeb nkab, hlau casing, bracket yeeb nkab, guardrail yeeb nkab, thiab lwm yam.)

Feem ntau,ncaj seam steel kavnrog ib txoj kab uas hla saum 325 yog hu ua loj-inch steel kav. Cov txheej txheem vuam ntawm qhov loj-inch tuab-walled longitudinal seam steel yeeb nkab yog ob-sided submerged arc vuam thev naus laus zis, thiab phau ntawv vuam kuj tuaj yeem nqa tawm tom qab cov yeeb nkab steel tsim. Txoj kev soj ntsuam dav dav yog kev kuaj pom qhov tsis haum. Tom qab kuaj pom qhov tsis zoo yog tsim nyog, nws tuaj yeem xa tuaj. Cov khoom tsis zoo yuav tsum tau welded dua. Loj-inch tuab-walled ncaj seam steel kav feem ntau haum rau kev thauj mus los ntawm cov kua dej, kev txhawb nqa ntawm steel qauv, thiab piling. Lawv tau dav siv hauv petrochemical, kev tsim kho, dej engineering, hluav taws xob kev lag luam, kev ua liaj ua teb, kev tsim kho hauv nroog, thiab lwm yam. Cov yeeb nkab steel yuav tsum muaj peev xwm tiv taus lub siab sab hauv, thiab ua tiav qhov kev ntsuas 2.5Mpa siab, thiab khaws cia tsis muaj qhov to. ib feeb. Cov txheej txheem ntawm eddy tam sim no flaw nrhiav tau raug tso cai los hloov cov hydraulic xeem. Cov txheej txheem molding feem ntau suav nrog UOE, RBE, JCOE, thiab lwm yam, ntawm cov JCOE muaj tus nqi siv siab. Cov yeeb nkab kawg tuaj yeem raug threaded raws li cov neeg siv khoom xav tau, tseem hu ua threaded thiab unthreaded.

Cov txheej txheem ntau lawm ntawm txoj kab uas hla loj ncaj seam steel yeeb nkab:

Cov txheej txheem ntau lawm ntawm txoj kab uas hla ncaj seam steel kav feem ntau suav nrog kev tsim khoom xws li kub dov, kub coiling, thiab casting. Qhov loj-inch tuab-walled steel kav feem ntau siv ob sab submerged arc vuam txheej txheem ntau lawm. Cov khoom yog khoov, welded, internally welded, thiab externally tiav. Vuam, straightening, tiaj tus taub hau, thiab lwm yam txheej txheem ua tau raws li cov kev cai ntawm petrochemical cov qauv.

Kev siv cov kav dej loj-ntev ncaj seam steel kav yog siv rau lub cev txhawb nqa, xws li choj piling, subsea piling, thiab high-rise tsev piling.

Cov ntaub ntawv siv rau cov kab loj-ntev ncaj seam steel kav yog feem ntau Q345B thiab Q345C. Q345D kuj tseem siv rau thaj chaw uas muaj qhov kub thiab txias. Q345E loj-inch ncaj seam steel kav feem ntau yog siv nyob rau hauv loj-scale steel qauv siv.