What are the Basic Refractory Bricks national or industry standards?

MgO brick GB/T2275-2001

MgO-CaO brick  YB/T4116-2003

MgO-Al2O3 brick YB/T5010-1993

MgO-Cr2O3 brick  YB/T5001-1997

Cement Rotary Kiln use directly bonded MgO-Cr2O3 Brick JC497-1992(96)

Glass furnace use MgO brick (MgO≥95%)  JC/T924-2003

MgO and MgO-SiO2 nozzle brick YB416-1980