Abrasive and Impact resistant Coal Transfer Pipe

We are presently using ss-304 Schedule 40 pipe for conveying the Fine coal (-5 mm) from Coal feeder to the Boiler furnace. The pipe is getting worn out in the impact area where the coal falls vertically from the feeder and diverts horizontally. Suggest me any abrasive and impact resistant quality pipe so that the life of the pipe increases as well as the breakdown time of the boiler comes down.