TAPPI TIP 410‐14. Generalized method for determining the pipe friction loss of flowing pulp suspensions Provides a means of determining the minimum value of pipe friction loss than can be expected based directly on all available published data. Consequently, i does not necessarily provide directly the actual design value of friction loss, and some judgement must be made by the designer. Each designer will have to determine and apply his own safety factor depending on company policy, projected expansion, possible flow system alternations, effects of other pipe fitting, and effects of other variables such as temperature, fiber aging, and past history. Applicable to stock consistencies (oven dried) from 2 to 6 percent.‐ Design Parameter Pulp Type Newsprint broke CSF=75 Consistency 2,5 (Oven Dried, expressed as a percentage of weight) Temperature 35 °C K´ 1,22 Table 1 TIP 0410‐14 ơ 1,4 Table 1 TIP 0410‐14 K 113 Table 2 TIP 0410‐14 α 0,36 Table 2 TIP 0410‐14 β 1,91 Table 2 TIP 0410‐14 γ ‐0,82 Table 2 TIP 0410‐14 Factor to correct According TECH‐E‐3 Gould Pump F1 1 F2 1,25 F3 1 F4 1 F5 1 F 1,25
Flow
60 [m³/hr] 0,016666667 [m³/s]
Bulk Velocity Vmax Vw Piping Type ID [m] Area [m²] Lenght [m] Velocity [m/s]
4,40 [m/s] Upper limits of the linear region in the friction loss curve 4,40 [m/s] Velocity at the onset of drag reduction
Cañería 4" Sch 10, Inox 0,10226 0,008212993 119,28 2,03 Region 1
Fittings Type Curve 45º Curve 90º NRV
Qty
Region 1 Region 2 Region 3
ΔH/L ΔH/L (ΔH/L)w
ID [m] 5 16 1
Area [m2] Vel [m/s] Kw Kc DH 0,10226 0,008212993 2,029 0,42582629 0,64 0,10226 0,008212993 2,029 0,85165258 1,28 0,10226 0,008212993 2,029 5 7,50 Head Loss Fitting
Pipe Friction Loss 0,236 [m/m] 0,312 [m/m] 0,028 [m/m]
28,14 [m] 37,18 [m] 3,34 [m]
0,13 0,27 1,57 1,98 [m]
