The long life of composite pipes
That which is a by-product of thermoelectric power generation plants, is diluted to a slurry in water and travels through pipes. But not just any pipes: the Korean manufacturer HFG (Hankuk Fiber Glass Co., Ltd) replaces the earlier ones made of cast iron, coated steel and even stainless steel with composite pipes.
Abrasion resistant composite pipes have resulted in a significant improvement in durability, economic feasibility and constructability: cast iron pipes have shortcomings such as gathering rust over time, sometimes getting perforated, and have higher costs and heavier weights than composite pipes. In addition, the insides of pipes become worn by the ash during the course of transfer, leading to the designated lifetime of ash transfer pipes being reduced to as little as two years.
The HFG abrasion resistant composite pipes have been constructed with a designated life of 2 years. But, after four years of use, some abrasion has been detected as noted in a small reduction in the thickness of the inner layer, however no breakage or perforations have been found, nor has any leakage been detected.
Laboratory results of Tabor abrasion testing that compared the abrasion resistant composite pipes with the existing cast iron pipes suggest that composite pipes could be a better choice than cast iron by a factor of 10.
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