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Perforated pipe in 1950 dow, 1950.Other works were published in the 1940s focusing on the use of perforated pipe as under-drains for rapid sand filters.These experiments involved the use of smooth pvc pipe with a series of holes drilled into them to create a porous pipe.Jenks 1921 focused on the head required to obtain uniform flow.
We are a large-scale joint-stock enterprise integrating scientific research, production and sales.Our leading products have crushing equipment, sand making equipment, mobile crusher, etc., Each type of product is with complete specifications. All products have passed ISO9001, CE and GOST international quality system certification.