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Di nav xwendekaran de, amacên kesane û cihê wan di nav pêşketinên Crayola de jehatî ye. Wekî ku wan dixwazin kêmkirin, wan hewl dikin ku Hêviyek rûdinê bi crayons xwe rabûnin. Serdema tarîxî yê crayons tê çêkirin, di sazkirinê de tiştekî nû ve tê dayîn, ev di bazarê de pêşketin berdewam dike.
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The friction factor is a measure of the resistance that a fluid experiences when flowing through a pipe. This resistance can vary greatly depending on the pipe's material, surface roughness, diameter, and flow rate. For galvanized iron pipes, the friction factor is crucially important because it directly affects the flow efficiency, energy consumption, and overall performance of the piping system. Higher friction factors lead to increased energy costs and reduced flow rates, making it essential for suppliers to understand how these factors interact.
One of the primary determinants of the friction factor is the roughness of the inner surface of the pipe. Galvanized iron pipes often exhibit a relatively high level of roughness compared to other materials, such as PVC or copper. This rough surface can lead to increased turbulence in the fluid flow, resulting in a higher friction factor. Suppliers need to pay close attention to the manufacturing processes that can influence the surface finish of their pipes. Techniques such as improved galvanization methods or surface treatments could significantly reduce the internal roughness and thereby lower the friction factor.
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