INTRODUCTION

WEHOLITE pipes are suitable for gravity and low pressure applications. The corrosive and abrasion resistant properties of HDPE provides a very durable pipe.

Flow rates for WEHOLITE can be calculated using the Colebrook White formula, with a Roughness Coefficient (ks) of 0.03mm. Polyethylene does not readily bond with or adhere to other materials. Siltation and sliming do not occur in the way they do in traditional materials, and long term flow characteristics remain constant.



Roughness Coefficient (ks)

The Roughness Coefficient (ks) for the Colebrook White formula of 0.03mm and the Manning's value (n) of 0.01 have been obtained by full scale field hydraulic measurements undertaken by the Independent Enterprise of Water Supply and Sewerage, Civil Engineering Department of the Technical University Swietkrzyska, Poland under the direction of Professor Andrzej Kuliczkowski.

Full copies of this report are available from ASSET International Ltd upon request.