... rollers are used in metallurgical industry furnaces centrifugal/spun casted ISO:9001:2008 Hearth Rolls n Various of designs of rollers from dia ... customer's requirements Standard: ANSI,ASTM,ASME,DIN,GB etc. Quality control: We have in-house facility for each inspection: Composition ... ,Mechanical test,NDT,UT,RT,PT,MT,ET,. Certificates: ISO9001:2008;3.1B Material Certificates,SGS Certificate.