Welded steel kav, tseem hu ua welded kav, yog steel tubs tsim los ntawm vuam steel daim hlau los yog steel strips tom qab lawv tau curled rau hauv cov duab. Cov txheej txheem ntau lawm ntawm welded steel kav yog yooj yim, nrog kev ua haujlwm siab, ntau yam kev qhia tshwj xeeb, thiab cov cuab yeej siv qis. Txawm li cas los xij, lawv lub zog feem ntau qis dua li cov kav dej seamless. Txij li thaum xyoo 1930s, nrog rau kev txhim kho sai ntawm cov khoom siv zoo steel nruam dov ntau lawm thiab kev nce qib hauv vuam thiab tshuaj xyuas thev naus laus zis, qhov zoo ntawm weld seams tau txuas ntxiv txhim kho, ua rau muaj ntau yam ntawm welded steel yeeb nkab specifications, uas tau maj mam hloov. seamless steel kav hauv ntau qhov chaw. Welded steel kav yog muab faib ua longitudinal welded kav thiab kauv welded kav raws li daim ntawv ntawm lawv weld seams.
Longitudinal welded kav muaj cov txheej txheem tsim khoom yooj yim, kev ua haujlwm siab ntau lawm, tus nqi qis, thiab kev loj hlob sai. Kauv welded kav feem ntau muaj lub zog siab dua li cov kav dej ntev ntev, tso cai rau kev tsim cov kav dej loj dua los ntawm cov kab nqaim, thiab cov kav dej sib txawv ntawm cov kab sib txawv ntawm tib qhov dav ntawm billet. Txawm li cas los xij, piv rau cov kav dej ntev ntev ntawm tib qhov ntev, qhov ntev ntawm cov vuam seam nce los ntawm 30-100%, thiab qhov ceev ntau lawm yog qis dua. Yog li ntawd, cov kav dej me me feem ntau siv cov kav ntev ntev, thaum cov kav dej loj dua feem ntau siv kauv vuam.
Longitudinal Welded Steel Pipes for Low-Pressure Fluid Transmission (GB/T 3092-2008}), tseem hu ua cov kav dej welded los yog cov kav dej dub, yog siv rau kev xa dej, roj, cua, roj, cua sov, thiab lwm yam qis. cov kua dej siab, nrog rau rau lwm lub hom phiaj. Cov kav dej tau muab faib ua cov phab ntsa tsis tu ncua thiab tuab raws li lawv cov phab ntsa tuab, thiab mus rau hauv cov kav dej dawb-kawg thiab threaded-kawg raws li lawv qhov kawg configuration. Cov kev qhia tshwj xeeb ntawm cov kav dej tau qhia nyob rau hauv nominal diameters (mm), uas yog kwv yees qhov tseem ceeb ntawm lub puab diameters. Cov kab no feem ntau tau hais tawm hauv ntiv tes, xws li 1½, thiab lwm yam. Dhau li ntawm kev siv ncaj qha rau kev xa dej, cov kav dej no kuj tau siv los ua cov kav dej hauv paus rau cov kav dej galvanized welded steel kav rau cov dej xau qis.
Galvanized Electric Welded Steel Pipes for Low-Pressure Fluid Transmission (GB/T 3091-2015}), feem ntau hu ua cov kav dej dawb, yog kub-dip galvanized welded (lub qhov cub-welded lossis hluav taws xob-welded) steel kav siv rau kev xa dej, roj, cua, roj, cua sov chav, dej kub, thiab lwm yam dej uas tsis muaj zog los yog rau lwm yam. Cov kav dej no tau categorized rau hauv tsis tu ncua thiab thickened galvanized hom raws li phab ntsa thickness, thiab mus rau hauv lub tiaj-kawg thiab threaded-kawg galvanized kav raws li qhov kawg configurations. Cov kev qhia tshwj xeeb yog qhia los ntawm nominal diameters (mm), uas yog kwv yees ntawm lub puab diameters, feem ntau qhia nyob rau hauv nti, xws li 1½, thiab lwm yam.
Ordinary Carbon Steel Wire Casing (GB 3640-88) yog siv rau hauv cov phiaj xwm kev teeb tsa hluav taws xob rau cov tsev lag luam thiab pej xeem, kev teeb tsa tshuab, thiab lwm yam kev siv los tiv thaiv cov xov hluav taws xob.
Longitudinal Electric Welded Steel Pipes (GB/T 13793-2016) yog cov kav dej nrog cov hlua txuas txuas mus rau qhov ntev ntawm cov yeeb nkab. Lawv feem ntau muab faib ua metric fais welded steel kav, hluav taws xob welded nyias-wall kav, transformer txias roj kav, thiab lwm yam.
Spiral Submerged Arc Welded Steel Pipes for Pressure Fluid Transmission (SY 5036-83) yog tsim los ntawm cov hlau kub dov, tsim rau hauv cov kauv ntawm chav tsev kub, thiab welded siv ob txoj kev submerged arc vuam txoj kev. Cov kav dej no yog siv rau kev xa cov kua dej siab. Lawv muaj peev xwm ua kom muaj zog-cov kabmob, kev ua haujlwm vuam zoo, thiab txhim khu kev qha thiab muaj kev nyab xeeb rau kev siv tom qab kev soj ntsuam nruj thiab kev sim. Nrog rau txoj kab uas hla loj thiab kev sib kis tau zoo, lawv tuaj yeem txuag tau cov nqi ntawm kev teeb tsa cov kav dej thiab feem ntau yog siv rau cov roj thiab cov kav dej ntuj.
Spiral High-Frequency Welded Steel Pipes for Pressure Fluid Transmission (SY 5038-83}) yog tsim los ntawm cov hlau kub dov, tsim rau hauv cov kauv ntawm chav tsev kub, thiab welded siv cov txheej txheem high-frequency lap welding. Cov kav dej no muaj peev xwm ua kom muaj zog, zoo plasticity, thiab yooj yim rau vuam thiab ua. Lawv txhim khu kev qha thiab muaj kev nyab xeeb rau kev siv tom qab ua tiav ntau yam kev soj ntsuam thiab kev sim. Nrog rau txoj kab uas hla loj thiab kev sib kis tau zoo, lawv tuaj yeem txuag tau cov nqi ntawm kev teeb tsa cov kav dej thiab feem ntau yog siv los tso cov roj thiab cov kav dej ntuj.
Spiral Submerged Arc Welded Steel Pipes for General Low-Pressure Fluid Transmission (SY5037-83) yog tsim los ntawm cov hlau kub dov, tsim rau hauv cov spirals ntawm chav tsev kub, thiab welded siv ob-sided tsis siv neeg submerged arc vuam los yog ib leeg- sided vuam txoj kev. Cov kav dej no yog siv los xa cov kua dej qis xws li dej, roj, cua, thiab chav.
Spiral High-Frequency Welded Steel Pipes for General Low-Pressure Fluid Transmission (SY 5039-83) yog tsim los ntawm kub-kuav los tiag steel strips, tsim rau hauv spirals nyob rau hauv chav tsev kub, thiab welded siv high-frequency lap welding txoj kev. Cov kav dej no yog npaj rau kev xa cov kua dej uas tsis tshua muaj siab.
Spiral Welded Steel Pipes for Piles (SY 5040-83}) yog tsim los ntawm kub dov steel strips, tsim rau spirals nyob rau hauv chav tsev kub, thiab welded siv ob-sided submerged arc vuam los yog high-frequency vuam txoj kev. Cov kav dej no yog siv rau hauv kev tsim vaj tsev engineering, docks, txuas hniav, thiab lwm yam hauv paus pawg.
