1. Mainstream specifications of galvanized pipe fittings
Low-pressure fluid delivery standards
Conventional models cover DN15-DN150, of which DN100 wall thickness 4.0mm and DN150 wall thickness 4.5mm are mandatory requirements for fire protection systems.
The zinc-iron alloy layer formed by the hot-dip galvanizing process increases the corrosion resistance life to more than 3 times that of ordinary steel pipes.
Special scenario applications
DN200 and above require seamless steel pipes (D219×7), with a wall thickness of 7.0mm to meet the needs of high-pressure water delivery.
2. Technical breakthroughs in grooved pipe fittings
Standardization of connectors
Grooved tees, elbows and other accessories support quick installation of DN65-DN200, and mechanical tees can realize threaded connection of branch pipes.
A fire protection project in Hubei uses rigid clamp accessories, and the seismic performance of the pipeline is improved by 40%.
Composite material adaptation
The new
grooved pipe fittings and
Flange accessories are compatible with
steel pipes, copper pipes and plastic-lined pipes, and all specifications from DN25 to DN150 support underground laying.
3. Industry specification upgrade
The 2025 version of the "Fire Water Supply Technical Specifications" clearly states:
The minimum pipe diameter of the sprinkler system is DN25, and each nozzle corresponds to the pipe diameter increment standard.
The clamp connection is mandatory for main pipelines above DN100.
The current market share of galvanized pipe fitting and grooved pipe fittings is 78%, and it is expected that smart monitoring pipe fittings will account for 35% of the new demand in 2026.
