... fly ash,mine dust,metallurgy slag ,sand,and concrete,etc. steel-corundum ceramic composite pipe to convey pulvarized coal and ... thermol power plant ,cement plant, aluminum factory, iron & steel works , mining, metaullurg industry, etc.The out part of ... the pipe is steel and inner part of is highly wear- resistant and ... Y, reducer and so on. abrasion (erosion)resistant steel pipe