18

Notes:

1. When metric (SI) units are utilized, use the value of K given in parentheses. When the metric values are used, diameter (D) must be in millimeters (mm) and velocity (V) in meters per second (m/s).

2. Original data obtained in stainless steel and PVC pipe. PVC is taken to be hydraulically smooth pipe.

3. Stainless steel may be hydraulically smooth although some manufacturing processes may destroy the surface and hydraulic smoothness is lost.

4. For cast iron and galvanized pipe, the K values will be reduced. No systematic data are available for the effects of surface roughness.

5. If pulps are not identical to those shown, some engineering judgment is required.

6. Wood is New Zealand Kraft pulp.

Notes:

1. When metric (SI) units are utilized, use the value of K given in parentheses. When the metric values are used, diameter (D) must be in millimeters (mm) and velocity (V) in meters per second (m/s).

2. Original data obtained in stainless steel and PVC pipe. PVC is taken to be hydraulically smooth pipe.

3. Stainless steel may be hydraulically smooth although some manufacturing processes may destroy the surface and hydraulic smoothness is lost.

4. For cast iron and galvanized pipe, the K values will be reduced. No systematic data are available for the effects of surface roughness.

5. If pulps are not identical to those shown, some engineering judgment is required.

6. Wood is New Zealand Kraft pulp.

TABLE IA Data (5, 6) for use with Eq. 1 or Eq. 1M to determine velocity limit, Vm

Pulp Type(5)

Pipe Material

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