Cov kev cai thiab kev tshuaj xyuas ntawm cov kav dej ncaj nraim yog ua raws li GB3092 "Welded Steel Pipes for Low-Pressure Fluid Transport" tus qauv. Lub nominal txoj kab uas hla ntawm welded yeeb nkab yog 6 ~ 15 0 hli, lub nominal phab ntsa thickness yog 2.0 ~ 6.0 hli, thiab qhov ntev ntawm welded yeeb nkab feem ntau yog 4 ~ 10 meters. Nws tuaj yeem raug xa tawm los ntawm lub Hoobkas hauv qhov ntev ntev lossis ntau qhov ntev. 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 ntawm cov phab ntsa thickness. 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 hydrostatic test. Eddy tam sim no flaw nrhiav tau ua raws li tus qauv GB7735 "Eddy Current 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 ~ 5mm 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 dov tawm ntawm cov kab ntau lawm ntawm lub flip ncej. Ob qhov kawg ntawm cov yeeb nkab steel yuav tsum tiaj tus-chamfered thiab cim, thiab cov kav dej tiav yuav tsum tau ntim rau hauv hexagonal bundles ua ntej tawm hauv lub Hoobkas.
