Tag nrho cov pa roj carbon steel kav siv rau qhov kub qis (tsawg dua -20 ° C) yuav tsum tau txais tus qauv GB6479, uas tsuas yog qhia txog qhov yuav tsum tau ua rau qhov kub tsis tshua muaj kev cuam tshuam ntawm cov khoom siv.

wb 3087thiabwb 5310cov qauv yog cov qauv tshwj xeeb tsim rau cov kav dej boiler steel. "Boiler Safety Supervision Regulations" qhia tias txhua cov kav dej txuas nrog boilers yog nyob rau hauv qhov kev saib xyuas, thiab kev siv lawv cov ntaub ntawv thiab cov qauv yuav tsum ua raws li "Boiler Safety Supervision Regulations". Yog li ntawd, boilers, fais fab nroj tsuag, cua sov thiab petrochemical ntau lawm cov cuab yeej siv Cov pej xeem chav pipelines (muab los ntawm system) yuav tsum tau txais GB3087 los yog GB5310 qauv.

Nws yog ib qho tsim nyog sau cia tias tus nqi ntawm cov kav hlau steel nrog cov qauv zoo steel yeeb nkab kuj yog qhov siab. Piv txwv li, tus nqi ntawm GB9948 yog ze li ntawm 1/5 siab dua li ntawm GB8163 cov ntaub ntawv. Yog li ntawd, thaum xaiv cov khoom siv steel yeeb nkab qauv, nws yuav tsum tau ua tiav raws li cov kev cai ntawm kev siv. Nws yuav tsum tau txhim khu kev qha thiab txhim khu kev qha. Yuav tsum tau nyiaj txiag. Nws tseem yuav tsum tau muab sau tseg tias cov kav hlau steel raws li GB / T20801 thiab TSGD0001, GB3087 thiab GB8163 tus qauv yuav tsum tsis txhob siv rau GC1 pipelines (tshwj tsis yog ultrasonically, qhov zoo tsis qis dua L2.5 qib, thiab tuaj yeem siv rau GC1 nrog tsim. siab tsis siab tshaj 4.0Mpa (1) pipeline).