Kev kho ua ntej ntawm cov kav hlau ncaj seam: kev sim tsis muaj kev puas tsuaj hauv welds. Txij li thaum cov yeeb nkab yog super-loj steel yeeb nkab nyob rau hauv txoj haujlwm dej, tshwj xeeb tshaj yog cov yeeb nkab steel nrog lub thickness ntawm t = 30mm yog siv los ua cov yeeb nkab txuas. Nws yuav tsum tau tiv thaiv ob qho tib si hauv dej siab thiab lub sijhawm khoov tsim los ntawm qhov hnyav ntawm cov yeeb nkab steel thiab lub cev dej, yog li cov kev xav tau vuam tshwj xeeb yog siab. Rau cov kav hlau loj loj nrog lub thickness ntawm t = 30mm siv nyob rau hauv cov yeeb nkab txuas, qhov ntev seams thiab circumferential seams yog ob qho tib si Class I welds, yuav tsum tau 100% X-ray zaj duab xis tshuaj xyuas thiab 100% yoj flaw detection soj ntsuam; Thaum lub faus steel kav nrog ib tug tuab ntawm t = 24mm, lub longitudinal seams belongs rau Class I welding, thiab 20% X-ray zaj duab xis tshuaj xyuas thiab 50% yoj flaw detection soj ntsuam yog nqa tawm.

Kev siv cov kav dej ncaj nraim welded: Muaj ntau ntau hom ncaj seam welded kav, raws li kev siv: dav dav welded kav, oxygen-blown welded kav, galvanized welded kav, hlau casings, cov menyuam kav, metric welded kav, tsheb kav, tob. zoo twj tso kua mis, transformer kav, hluav taws xob welded tshwj xeeb-zoo li tus kav, thiab hluav taws xob welded nyias-walled kav.

General welded kav: General welded kav yog siv los thauj cov dej uas tsis tshua muaj siab. Ua los ntawm Q235A, L245, thiab Q235B steel.
Galvanized steel kav: Nws yog los coated nto ntawm cov yeeb nkab dub nrog zinc. Nws muab faib ua kub thiab txias. Cov txheej kub zinc txheej yog tuab, thiab tus nqi txias yog pheej yig.
Oxygen-blown welded kav: Feem ntau, lawv yog me me-inch welded steel kav, uas feem ntau yog siv rau steelmaking oxygen tshuab.
Hlau casings: Lawv yog cov kav dej rau kev faib khoom, uas yog cov hluav taws xob zoo tib yam welded carbon steel kav.
Hluav taws xob welded nyias-walled kav: Lawv yog cov kav me me uas siv rau rooj tog thiab teeb.
Cov kav dej rau cov menyuam: Cov kav hluav taws xob welded steel kav ntawm txoj siv conveyor yuav tsum tau ovality.
Transformer kav: Lawv yog cov pa roj carbon hlau zoo tib yam. Siv los tsim cov tshuab cua txias thiab lwm yam khoom siv hluav taws xob.