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2026

08-17

Why Stainless Steel Water Pipes Matter for Safe, High-Quality Buildings

Under the combined influence of China's “Healthy China” initiative and increasingly stringent green building standards, water quality safety has become a key priority in building water supply systems. Franta provides comprehensive stainless steel water piping solutions covering press-fit thin-wall pipes, large-diameter grooved systems, and customized whole-house water systems, helping residential and public buildings achieve safer, healthier, more reliable water distribution from source to point of use.

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Franta

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The Key to Safe Building Water Supply Lies Not Only in the Water Plant, but Also in the Piping Network

　　Driven by China's “Healthy China” initiative and continuously evolving green building standards, water quality safety in building water supply systems has become a major concern. Yet in many real-world projects, one often-overlooked issue continues to threaten residential water quality: secondary contamination from internal building water supply pipes. Industry data indicates that:

　　Traditional PPR plastic pipes commonly deteriorate after 15-30 years of use, with bacteria potentially developing on aging internal surfaces and biofilm coverage reaching up to 35%.

　　Corrosion of galvanized steel pipes can result in “red water” and “yellow water,” while deterioration of the zinc coating can further increase the risk of secondary water contamination.

　　Plastic pipes exposed to high-temperature conditions may release certain low-molecular-weight substances, creating potential health concerns.

　　This means that no matter how good the original water source is, water quality at the point of use cannot be fully guaranteed if the internal piping network is outdated.

　　Japan began promoting stainless steel water pipes in the 1980s, and adoption has now exceeded 90%. In Germany and other European countries, stainless steel water pipe adoption has also exceeded 70%. In recent years, with the introduction of national standards such as the Standard for Design of Building Water Supply and Drainage (GB 50015-2019), together with continued promotion of stainless steel water pipes by China's Ministry of Housing and Urban-Rural Development and other authorities, building water supply piping in China is entering a new phase of upgrading. Pipe selection has therefore become one of the key factors in optimizing building water supply systems.

Three Building Scenarios, Three Different Water Supply Requirements

　　Research shows that different types of building projects have significantly different core requirements for water supply piping systems:

　　Therefore, pipe selection in a real-world project is not simply about choosing a product. It is about selecting a water supply system solution that matches the project's actual operating conditions.

Three Stainless Steel Piping Systems for Complete Building Water Supply Solutions

　　To address different building application requirements, Franta has developed a comprehensive stainless steel water supply piping portfolio covering sizes from DN15 to DN300:

　　DN15-DN100 Press-Fit Thin-Wall Stainless Steel Piping — A Mainstream Choice for Building Water Supply Upgrades

　　For most building water supply applications, press-fit thin-wall stainless steel piping has become a mainstream solution for system upgrades. Made from 304/316L stainless steel, the pipes feature smooth internal surfaces that are less prone to scaling, less conducive to bacterial growth, and designed to minimize the release of unwanted substances, helping reduce the risk of secondary water contamination at the source.

　　Press-fit connection technology is based on mature German technology. Its six-sided compression structure applies dual compression to the sealing ring, with a first-pressure-test pass rate of more than 99.9%. The connection process is fast, secure, and aesthetically clean. Installation requires no welding or open flames, significantly improving construction efficiency. The system is suitable for direct drinking water systems, hot and cold water systems, and water supply risers in high-rise buildings.

　　From a lifecycle perspective, the system can provide a maintenance-free period of up to 70 years, comparable to the service life of the building structure, while total maintenance costs can be reduced by 40%-60% compared with conventional piping materials, combining reliability with long-term economic value.

　　DN65-DN300 Grooved Stainless Steel Piping — An Efficient Solution for Large-Diameter Water Supply Systems

　　For large-diameter applications such as municipal water supply networks, residential pump rooms, and fire protection systems, grooved connections offer significant advantages: fast assembly and disassembly without on-site welding, which can substantially shorten construction schedules; and flexible connections that can accommodate thermal expansion, contraction, and minor pipe movement while providing strong system resistance to vibration.

　　Products are manufactured in accordance with applicable standards including CJ/T 151-2016 and CJ/T 152-2016. Grooved fittings combined with stainless steel pipes meet the requirements of high-pressure applications such as secondary water supply systems and fire protection water supply. These systems have been successfully applied in numerous municipal water projects and large public buildings.

　　Whole-House Active Water System — An Integrated Solution for Healthier Residential Water

　　For high-end residential and villa users, Franta provides an integrated whole-house water system covering water purification, piping, and water outlets. Piping layouts are customized according to the home design, with dedicated direct drinking water lines and rapid hot water delivery to provide comprehensive protection for household water quality and comfort.

　　Franta also provides professional whole-house water management services, covering site surveys, system design, installation acceptance, and long-term maintenance. Through full-process support, the system is designed to protect household water quality and provide cleaner, safer water for everyday use.

From Product Supply to Integrated Services: Building Water Supply Enters a New Stage of Value Upgrade

　　In the past, piping was often treated simply as a supporting construction material. Today, driven by the “Healthy China” initiative and green building development, the industry is undergoing a fundamental shift: piping is becoming the first line of defense for building water quality.

　　Through its three major product systems, Franta delivers comprehensive coverage across applications, lifecycle optimization, and system-level water quality protection: complete scenario coverage through small-diameter press-fit piping, large-diameter grooved piping, and customized whole-house water systems; optimized lifecycle value through improved investment and maintenance economics; and system-level water quality protection from the source to the point of use, helping minimize the risk of secondary contamination.

　　Since its establishment in 1998, Franta has focused on the research, development, and manufacturing of stainless steel products for more than 20 years. The company holds 50 independently developed patented technologies and has participated 28 times in the drafting and compilation of national and industry standards. Its products are used across commercial real estate, residential real estate, public facilities, municipal water applications, industrial applications, gas transmission, and other sectors, serving more than 10,000 stainless steel piping system projects across China.

　　Franta has introduced leading precision presses, pipe manufacturing equipment, advanced welding systems, and testing equipment, together with comprehensive production processes including bright solution heat treatment, gas-shielded welding, pickling and passivation, and ultrasonic cleaning. The company also operates comprehensive testing facilities and a laboratory aligned with national piping standards to help ensure consistent quality in every meter of stainless steel piping.

Franta and “Made in Zhejiang”: Setting Higher Standards for Quality

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