Sab hauv thiab sab nraud tsis xws luag ntawm steel chim lub cev weld raug tso cai kho nyob rau hauv ib tug tej yam ntau yam. Cov txheej txheem kev kho welds yog raws li nram no:
1, Kev nkag mus tsis tiav, tsis yog airtight, sab hauv tawg, tawg, tawg pob qij txha, thiab lwm yam tuaj yeem kho dua nrog lub seam welder.
2, Tsis welded, tsis airtight, sab hauv thiab sab nrauv tawg, ntug tawg tuaj yeem kho los ntawm cov roj vuam.
3, Sab nrauv txaws, welded ntug flange, electrode adhesion, nto blackening yuav siv tau los polish qhov nto ntawm lub grinder.
4, Brittle solder pob qij txha nrog oxyacetylene nplaim kho vuam.
5, Txhawm rau tshem tawm kev ntxhov siab deformation, cov npoo npoo npoo tuaj yeem raug kho los ntawm dov lossis ib nrab siab.
6, Tsis airtight, sab nrauv tawg tuaj yeem kho nrog super kua nplaum.
7, Tsis welded, tsis airtight, sab hauv thiab sab nrauv tawg, ntug tawg tuaj yeem kho nrog tin brazing.