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Frictional pressure loss for flow of Sodium Carboxymethyl Cellulose (SCMC) aqueous solutions in piping system has been experimentally, investigated. Pipes of inner diameters range from 6 to 17.5 mm, were used. SCMC aqueous solutions have been found to behave as pseudoplastic fluids. Smooth and rough pipes have been used for SCMC concentration ranges from 0.03 to 1.1 wt.%. It has been found that the pressure drop-flow rate diagram for pipes was similar to that of Newtonian fluids, with different consistency equation and transient Reynolds num. ber. As concentration increases, the pressure loss increases, apperciably in the laminar region than in the turbulent one. INTRODUCTION Due to the importance of non-Newtonian fluids, considerable work has been undertaken to develop methods, by which the frictional head losses may be predicted. Bench scale viscometric data or pilot scale piping may be used, /1/." Herein, pilot scale friction apparatus was used to investigate : 1. Effect of varying (SCMC) concentration on the flow, A Ph.D., Military Technical College, Kobry el Kobba, Cairo. § Eng., Armament Authority, Kobry el Kobba, Cairo. §§ Reference number. SECOND A.M.E. CONFERENCE 6 8 May 1986 , Cairo IE -2 12

EXPERIMENTAL INVESTIGATION OF FLOW EQUATION OF SCMC AQUEOUS SOLUTION IN PIPELINES