Piping

PIPE SIZE CALACULATION INPUT

SLURRY FEED – 265 m3/hr

Particle Size, d50, Dp Solids Specific gravity, Ss Slurry Specific gravity, Sp Percent Solids by Weight, Cs Percent Solids by Volume, Cv Gravity acceleration, g Volume flow rate

92 µm 2.42 1.53 52.3% 33.0% 9.81 m/ sec2 265 m3/hr

OUTPUT Critical Velocity Pipes (Durand’s formula) DURAND’S FORMULA, Vc = FL x {2 x g x Di x (Ss-1)} ^ 0.5 FL = 0.95 (From Graph, Average Particle Size µm Vs FL) For 150 NB CS PIPE Pipe Outside Diameter, (O.D in mm) = 165.1 Pipe Wall Thickness, (T in mm) = 5.4 Pipe rubber lining Thickness, (RT in mm) = 6 Pipe Inside Diameter, (Di in mm) = 142.3 Critical velocity, (Vc in m/s) = 1.9 Actual Velocity – Slurry, (Va in m/s) =4.6 For 200 NB CS PIPE Pipe Outside Diameter, (O.D in mm) = 219.1 Pipe Wall Thickness, (T in mm) = 6.35 Pipe rubber lining Thickness, (RT in mm) = 6 Pipe Inside Diameter, (Di in mm) = 194.4 Critical velocity, (Vc in m/s) = 2.2 Actual Velocity – Slurry, (Va in m/s) = 2.5 For 250 NB CS PIPE Pipe Outside Diameter, (O.D in mm) = 273 Pipe Wall Thickness, (T in mm) = 6.35 Pipe rubber lining Thickness, (RT in mm) = 6 Pipe Inside Diameter, (Di in mm) = 248.3

Critical velocity, Actual Velocity – Slurry, SELECTED PIPE SIZE

(Vc in m/s) (Va in m/s)

= 2.5 = 1.5

- 200NB

The actual velocity falls within range 1-3m/s and greater than settling velocity

SLURRY FEED - 530 m3/hr

INPUT Particle Size, d50, Dp Solids Specific gravity, Ss Slurry Specific gravity, Sp Percent Solids by Weight, Cs Percent Solids by Volume, Cv Gravity acceleration, g Volume flow rate

92 µm 2.42 1.53 52.3% 33.0% 9.81 m/ sec2 530 m3/hr

OUTPUT Critical Velocity Pipes (Durand’s formula) DURAND’S FORMULA, Vc = FL x {2 x g x Di x (Ss-1)} ^ 0.5 FL = 0.95 (From Graph, Average Particle Size µm Vs FL) For 200 NB CS PIPE Pipe Outside Diameter, (O.D in mm) = 219.1 Pipe Wall Thickness, (T in mm) = 6.35 Pipe rubber lining Thickness, (RT in mm) = 6 Pipe Inside Diameter, (Di in mm) = 194.4 Critical velocity, (Vc in m/s) = 2.2 Actual Velocity – Slurry, (Va in m/s) = 5.0 For 250 NB CS PIPE Pipe Outside Diameter, (O.D in mm) = 273 Pipe Wall Thickness, (T in mm) = 6.35 Pipe rubber lining Thickness, (RT in mm) = 6 Pipe Inside Diameter, (Di in mm) = 248.3 Critical velocity, (Vc in m/s) = 2.5 Actual Velocity – Slurry, (Va in m/s) = 3.0 For 300 NB CS PIPE Pipe Outside Diameter, (O.D in mm) = 324 Pipe Wall Thickness, (T in mm) = 8 Pipe rubber lining Thickness, (RT in mm) = 6 Pipe Inside Diameter, (Di in mm) = 296 Critical velocity, (Vc in m/s) = 2.7 Actual Velocity – Slurry, (Va in m/s) = 2.1 SELECTED PIPE SIZE

- 250NB

The actual velocity falls within range 1-3m/s and greater than settling velocity