... proven design. Simple maintance 4manhole Welded ball mill shell consists of an all-welded mill shell and a T-sectional welded-up ... test and so on.Surface treatment and other requirement from customer.Standard&certificate:ASTM,BS,NF,DIN,JIS and ... CCS,DNV,NK,RINA,KR and so on.Weight:from 3 tons to 120 tons per pieceApplication: The products ... for machining to obtain a smooth surface. Welded ball mill shell