Cov kav hlau muaj xws li cov kav hlau zoo tib yam, cov kav hlau galvanized thiab seamless steel kav. Ordinary steel kav yog siv rau cov kav dej uas tsis muaj dej haus lossis cov kav dej dav dav. Qhov saum npoo ntawm cov yeeb nkab steel yog galvanized (tsim los ntawm kub-dip galvanizing) los tiv thaiv xeb thiab xeb, thiaj li tsis cuam tshuam rau cov dej zoo. Nws yog qhov tsim nyog rau cov kav dej haus lossis qee cov kav dej ua haujlwm nrog cov dej siab zoo; seamless steel kav yog siv rau high-pressure yeeb nkab tes hauj lwm. , nws ua haujlwm siab tshaj 1.6MPa. Txoj kev sib txuas ntawm cov kav hlau muaj xws li threaded kev twb kev txuas, vuam thiab flange kev twb kev txuas. Threaded kev twb kev txuas yog kev sib txuas uas siv threaded yeeb nkab fittings. Feem ntau ntawm cov khoom siv yog ua los ntawm malleable cam khwb cia hlau, galvanized thiab tsis-galvanized, uas muaj siab corrosion kuj thiab mechanical zog. Tam sim no muaj ob peb steel fittings. Galvanized steel kav yuav tsum tau threaded, thiab lawv fittings yuav tsum tau galvanized fittings. Txoj kev no feem ntau yog siv rau cov kav dej tawm. Vuam yog siv cov tshuab vuam thiab cov electrodes los txuas ob ntu ntawm cov kav dej ua ke. Qhov zoo dua yog tias qhov sib koom ua ke yog nruj, tsis muaj dej to, tsis muaj cov khoom siv ntxiv, thiab kev tsim kho yog ceev. Tab sis tsis tuaj yeem disassembled. Vuam tsuas yog tsim rau cov kav hlau tsis-galvanized. Txoj kev no feem ntau yog siv rau cov kav dej zais. Flanges txuas nrog cov kav dej uas muaj qhov loj dua (siab dua 50m), thiab cov flanges feem ntau welded (los yog threaded) ntawm cov yeeb nkab kawg, thiab tom qab ntawd ob lub flanges txuas nrog bolts, thiab tom qab ntawd ob ntu ntawm cov yeeb nkab kuj txuas nrog. ua ke. Flange kev sib txuas feem ntau yog siv los txuas li qub, kos li qub, ntsuas dej, twj tso kua mis, thiab lwm yam, nrog rau cov yeeb nkab seem uas yuav tsum tau nquag disassembly thiab tu.
