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Source: Digital meters http://yunrun.com.cn/product/ Water meters are among the most widely used metering devices in the field of flow measurement, featuring large usage volumes, broad application ranges, and a wide variety of models and specifications. It plays a crucial role in areas such as supply and drainage flow measurement, water fee settlement, energy metering, and process control for industrial water use. With the increasing strain on water resources and the accelerating process of their commodification, there is a growing demand for water meters, which in turn drives the expansion of the market for this industry. For the mainstream water meters currently in use in the market, the casings of these meters are mostly made from molds cast by melting iron or copper, which presents numerous drawbacks. Firstly, due to the constraints imposed by the shell structure and casting processes, the thinnest thickness of a typical shell still needs to be 5–8 mm. This results in the production of such shells requiring large amounts of iron or copper. Moreover, their thickness contributes to the high weight of both the shell and the water meter, which makes production, transportation, and installation more difficult. Secondly, the casting method requires iron or copper to be melted into a liquid state first, which results in extremely high energy consumption during production; it uses a lot of energy and generates large amounts of greenhouse gases, making it unsuitable for the environment. Furthermore, since water meters need to be in contact with water sources for a long time, the inherent properties of iron and copper cause chemical reactions to occur after prolonged exposure to water, which affects water quality. This is detrimental both to water quality safety and to the service life of the water meters. Finally, for reasons related to water security, regulations require that water meters be replaced after a certain period of use. Traditional iron and copper water meters need to be disassembled, and their casings must be slightly processed before being used as sources of iron and copper and fed back into the melting furnace for re-melting. This recycling method is not only costly but also highly likely to cause environmental pollution. Therefore, there is an urgent need for a new manufacturing process for water meter casings that uses safer materials and results in lower production costs, in order to replace the existing materials and manufacturing techniques for water meter casings. Stainless steel is used in the manufacture of water meter casings due to its many advantages, including the ability to maintain healthy and environmentally friendly water quality, low pollution during production processes, the possibility of reusing resources, and low overall costs. Stainless steel is one of the most widely used steels in the world today, offering an excellent cost-performance ratio; in water supply and drainage treatment systems, its superior corrosion resistance makes it an ideal material. Currently, stainless steel is widely used in developed countries for water supply pipelines, indoor water supply pipes, and meter casings. However, the existing methods for manufacturing water meter casings using stainless steel involve joining various components through laser welding, which results in high equipment costs and thus elevated production expenses, making it unsuitable for large-scale industrial production. Furthermore, the performance parameters of the finished housings and their product stability also have not reached a level suitable for commercial use. Zhejiang Youlipu Metrology Technology Co., Ltd. (hereinafter referred to as “Youlipu Technology”) has innovatively developed a stainless steel water meter case blank, as well as a processing method for it, that features controllable manufacturing costs, easy process control, excellent structural properties and high yield rates, along with safe material usage. It has also produced stainless steel water meter cases using this processing method, as well as water meters equipped with such cases. It represents creative R&D breakthroughs at both the domestic and international levels in terms of material selection approaches and manufacturing processes, and has currently obtained a **patent certificate. The stainless steel water meter housing manufactured through the processing technique and product structure proposed in this invention, as well as the water meters produced using it, possess numerous advantages. Firstly, the stainless steel sheet raw materials used in this invention are purchased from large manufacturers capable of handling environmental issues, and subsequent production processes do not pose significant environmental pressures ； The housing is extruded rather than manufactured using the energy-intensive and polluting casting method, making it more environmentally friendly. Secondly, compared with the laser welding method, the manufacturing process proposed in this invention features a more rational decomposition of the water meter housing structure, and the equipment used is less costly, which facilitates its wider adoption. Finally, the stainless steel water meter manufactured by this invention has lower operating costs. At the end of their service life, stainless steel water meters can be recycled with their vulnerable components replaced; the intact casing and other parts can be reused, whereas water meters made of copper and iron do not have this advantage. Youlipu Technology is a modern enterprise specialized in the research, development, production, sales, and service of water meter casings made of stainless steel. Over nearly a decade, the company has dedicated itself to understanding and developing stainless steel water meter casings. Adhering to the spirit of perseverance, it focuses on meeting the users’ core need for safe, food-grade water, striving for product innovation, technological advancement, and improved quality. The newly developed manufacturing technology for water meter casings made of stainless steel fills a gap in China and is at the world’s leading level. Youlip Technology currently possesses core technologies such as large-scale continuous stamping, pressure holding forming, robotic automatic welding, and innovative environmentally friendly surface treatment methods. The company strictly adheres to the ISO9001 international quality management system standards, and utilizes its professional and advanced technical skills to meticulously manufacture water meter casings made of stainless steel, contributing its part to the stainless steel revolution in the drinking water industry.