Piping material erosion by slurry

Hello , i need your help to solve my problem,

i have problem with a slurry pipe,
slurry flow : 5 m/s
slurry ( sand and seawater mixture)
pipe diameter : 600 mm
pipe thickness : 20 mm

what is the erosion rate (in mm/year) for that pipe??

or if you had experience, how long the lifetime of that pipe??

thank you for your help.