1. Lub tshuab ua tiav thiab cov khoom lag luam yuav tsum raug kuaj xyuas thiab tsim nyog ua ntej kev kho saum npoo.
2. Cov pob tawg, vuam txheej, vuam tsoo, vais, plua plav thiab nplai ntawm qhov chaw ntawm welded steel kav yuav tsum tau muab ntxuav ua ntej xeb tshem tawm, thiab cov xoob oxide teev thiab tuab txheej txheej yuav tsum tau muab tua ua ke.
3. Yog tias muaj roj thiab roj nyob rau saum npoo ntawm welded steel yeeb nkab, nws yuav tsum tau muab tshem tawm ua ntej xeb tshem tawm. Yog tias muaj cov roj ntsha thiab roj los ntawm tsuas yog rau thaj tsam ntawm thaj chaw, feem ntau txoj hauv kev pov tseg feem ntau siv tau; yog tias muaj thaj chaw loj lossis txhua qhov chaw, cov kuab tshuaj daws teebmeem lossis dej kub alkalis tuaj yeem siv rau kev tu tsev.
4. Thaum muaj kua qaub, alkali lossis ntsev rau saum npoo ntawm welded steel yeeb nkab, koj tuaj yeem xaiv ntxuav nws kom huv nrog dej kub lossis tso pa. Txawm li cas los xij, kev saib xyuas yuav tsum tau them rau qhov pov tseg cov dej khib nyiab kom tiv thaiv kev ua qias tuaj ib puag ncig.
5. Qee cov kav hlau tshiab tshiab tau pleev xim nrog cov xim pleev xim txhawm rau txhawm rau tiv thaiv lawv kom tsis txhob xeb thaum lub sijhawm cia thiab thauj mus los. Lub kav hlau tsis xeb coated nrog cov xim saib xyuas yuav tsum tau muab pov tseg raws li cov kev mob tshwj xeeb. Yog tias cov xim tha xim tu yog ob txheej txheej uas kho los ntawm tus neeg sawv cev ua kom zoo, thiab cov xim txheej tsis muaj qhov tsis muaj, nws tuaj yeem kho nrog daim ntaub emery, stainless hlau raj velvet lossis tshuaj tsuag lub teeb, thiab tom qab hmoov av tau ntxuav, tom ntej cov txheej txheem tuaj yeem nqa tawm. Cov.
6. Rau kev saib xyuas ntawm lub tsev muag xim pib txheej lossis cov qauv dav dav rau saum npoo ntawm welded steel kav, txoj kev pov tseg feem ntau yuav tsum txiav txim siab raws li cov xwm txheej ntawm cov xim txheej thiab xim tom ntej xim. Txhua yam uas tsis tuaj yeem ua pleev xim ntxiv lossis cuam tshuam rau kev cuam tshuam ntawm cov txheej tom ntej yuav tsum tau muab txav los ntawm txee.
