GB Stainless Steel Flanged Ball Valve Standard Size For Industrial Pipeline
GB standard stainless steel flanged ball valves match Chinese pipeline standards, durable & easy maintenance for industrial & municipal engineering.
Description
GB stainless steel flanged ball valves are strictly manufactured in accordance with Chinese national standards GB/T 12224, GB/T 12227, and GB/T 26647. Their flange dimensions, face‑to‑face lengths, and pressure ratings are fully compatible with municipal, chemical, and HVAC pipeline systems within China. Available in two‑piece and three‑piece body configurations, these valves offer standardized specifications, wide applicability, reliable sealing, and easy maintenance.
They are extensively used in municipal water supply and drainage, industrial park recirculating water, HVAC cooling water, neutral chemical media transfer, and commercial water systems – making them the preferred isolation valve for domestic infrastructure projects and overseas turnkey projects that adopt GB‑standard piping.
Forged Body, Full Pressure Coverage, and Modular Design
The valve bodies are forged from 304 or 316L stainless steel, eliminating casting defects such as porosity and sand inclusions. Flanges conform to GB/T 9113 raised‑face dimensions, with full coverage of PN16, PN25, and PN40 pressure ratings, ensuring seamless integration with domestic seamless steel pipes and galvanized steel pipe companion flanges – no additional on‑site modification is required.
The widely adopted 3pc gb stainless steel flanged ball valves (three‑piece modular type) are particularly favored in industrial settings. The end flanges remain fixed to the pipeline, so maintenance simply involves removing the middle body section to replace the ball and seat seals – drastically reducing system downtime.
The balls are mirror‑polished and paired with flexible PTFE seats to achieve Class VI zero leakage. Two operating principles are offered: floating gb ball valve for smaller diameters (DN50 and below) to control costs, and trunnion gb flanged ball valve for large‑flow mainlines (DN80 and above) to withstand high‑pressure thrust.
Cost‑Effective and Retrofit‑Friendly
Compared with ANSI‑standard flanged ball valves, GB flanged stainless steel ball valves have face‑to‑face lengths and flange bolt hole patterns that directly match existing domestic piping networks. Retrofitting or replacement requires no changes to pipeline flanges, cutting installation time in half. Moreover, large‑volume domestic production yields significant cost advantages – for the same material and pressure rating, procurement costs are notably lower.
All valves undergo hydrostatic testing and non‑destructive inspection in accordance with GB/T 13927. They are available with manual, pneumatic, or electric actuation to suit various control requirements. While the standard 304 version handles fresh water applications, the 316L option is also suitable for reclaimed water with moderate salinity and mildly corrosive chemical streams.
Technical Specifications
| Parameter | Specification |
|---|---|
| Design Standards | GB/T 26647, GB/T 9113, GB/T 13927 |
| Body Material | 304 / 316L stainless steel forgings |
| Pressure Ratings | PN16, PN25, PN40 |
| Flange Type | GB raised‑face (RF) flanges |
| Body Styles | Two‑piece / three‑piece; floating or trunnion‑mounted |
| Suitable Media | Tap water, cooling water, reclaimed water, neutral chemical fluids |
Case Study – Wuxi Xincheng Industrial Park Recirculating Water Pump Station
At the recirculating water upgrade project located at No. 67 Tongyang Road, Xishan District Industrial Park, Wuxi, the existing piping network was entirely GB‑standard. The facility initially tried ANSI flanged ball valves, but found that bolt hole patterns did not align, requiring on‑site re‑drilling that extended the construction schedule and created sealing risks.
After switching to GB stainless steel flanged ball valves, the flange bolt positions and face‑to‑face dimensions perfectly matched the original pipeline, enabling direct installation and cutting overall construction time by 50%. The three‑piece design also simplified routine maintenance – scale removal could be done without dismantling the pipeline, reducing per‑valve repair time from 7 hours to just 2 hours. After two years of operation, no leakage or corrosion has occurred, and total retrofitting costs decreased by 28%.
ANSI ball valves often require secondary modification to fit domestic networks, while conventional cast‑iron flanged ball valves are prone to rust and leakage. GB stainless steel flanged ball valves, with their inherent standardization advantage, are fully compatible with the vast majority of industrial and municipal pipelines in China – and they are also the preferred valve choice for Chinese‑engineered package export projects worldwide.