There are many kinds of products standard in different countries, regulars are Chinese standard MG23 (1230°C), MG25(1350°C), MG26(1400°C), MG27(1450°C), MG28(1510°C), MG30(1620°C), MG32 (1730°C); and similar JM23, JM25, JM26, JM27, JM28, JM30, JM32; and K23, K25, K26, K27, K28, K30, K32 and others likes A series, A1, A2, A3, A4, A5, A6, A7; B series, B1, B2, B3, B4, B5, B6, B7; C series, C1, C2, C3 and some refractories have their own name, like MD, HT and so on.
If you don't have detailed information, Just tell us which type of furnace, using temperature and size, we could choose properrefractory products for you. If you could supply more details, like sintered products, whether have atmosphere and what,refractory brick drawings and data sheet, we'll be very appreciated.