CAO FENG


Cao Feng, male, born in July 1990, is from Qinhuangdao City, Hebei Province, China. Graduated from Xi'an University of Architecture and Technology with a Master's degree in Heating, Gas Supply, Ventilation and Air Conditioning Engineering. Since graduation, I have worked in the architectural design and research institute, specializing in the design of building plumbing and HVAC systems. I have rich experience in the design of piping systems in the field of building plumbing and HVAC. Currently, I work at Hongyue Plastic Group Co., Ltd. as a new product research and development engineer for plastic pipes and fittings. I have accumulated rich experience in the development of plastic pipes and fittings in fields such as water supply and drainage, HVAC, etc. Engaged in the development of new plastic pipe products, proficient in the conversion of foreign technical documents and technological achievements, and participated in the translation of multiple standards and foreign books. Has rich experience and unique insights in pipeline system design, construction and installation, product application, and system matching; Proficient in technology promotion, personnel training, and technical guidance for construction and installation.

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Comparative Study on PE-Xa Cold Expansion Connection and Copper Crimp Connection


PE-Xa pipes have excellent resistance to low temperature, high temperature, wear resistance, flexibility, and are widely used in the European, American, and Australian markets.PE-Xa pipes can be connected in various ways, including ASTM F1960 cold expansion connection, ASTM F1807 copper crimp connection, and ASTM F2080 sliding connection. PE-Xa pipes have unique thermal memory properties, which can be used to match PPSU fittings (ASTM F1960) for cold expansion connection.This article compares the F1960 cold expansion connection and F1807 copper crimp connection based on actual residential water supply systems, especially in terms of water flow rate. It analyzes the local resistance of the two connection fittings and calculates the resistance loss of the two connection systems.The results show that at the same flow rate, using cold expansion connection can increase the flow rate of the water supply system by about 25% compared to using copper crimp connection, and reduce the system resistance loss by about 37% compared to using copper crimp connection. This is because F1960 adopts a flared connection, which increases the pipe diameter and reduces system resistance.Each connection system comes with copper and plastic fittings, especially PPSU fittings. PPSU is a food grade material with superior mechanical, chemical, and heat resistance properties. Compared to copper, they are lightweight, have better corrosion resistance, and will not affect water quality, hygiene, and safety; At the same time, PPSU has lower prices and lower investment for engineering projects, making it a new choice for builders, purchasers, and suppliers.