Cangzhou Avant International Trade Co., Ltd. is one of the leading manufacturers and suppliers of threaded flange in China. We are committed to providing high quality customized products with competitive price. Welcome to wholesale cheap threaded flange in stock here from our factory. Also, free sample is available.
The threaded flange body is a single-piece forging with internal pipe threads. Installation involves screwing the externally threaded pipe into the flange and then securing the connection between two flanges using bolts and gaskets. Its primary advantage is the elimination of the welding process: there is no need to transport welding equipment or consumables, nor is a hot work permit required, resulting in rapid on-site assembly. Disassembly for maintenance or pipeline modification is also straightforward, and components can be reused if they remain in good condition. However, these products are predominantly used for small-bore piping (DN10 to DN100). At larger diameters, the threaded connection's structural integrity under load diminishes and the risk of leakage increases significantly; consequently, threaded flanges are rarely selected for large-diameter piping projects.
Key Performance Parameters and Limitations of Threaded Flanges
Size and Pressure: Threaded flanges are primarily suitable for small-bore piping, typically ranging from DN15 to DN150 (1/2" to 6"). Regarding pressure, they are generally suited for low-to-moderate pressure applications (e.g., PN16 or Class 150/300) and are not recommended for high-pressure main pipelines.
Temperature Limitations: Because threaded connections are prone to loosening or leakage caused by thermal expansion and contraction under extreme temperatures, they are generally unsuitable for harsh operating conditions involving temperatures above 260°C or below -45°C.
Sealing Faces and Threads: Common sealing face types include Raised Face (RF) and Flat Face (FF). Thread types include American Standard Taper Pipe Threads (NPT, requiring PTFE tape) and British Standard Parallel Pipe Threads (G, requiring a gasket for sealing). Our threaded flanges are compatible with major international engineering standards and regional project specifications, including ASME B16.5 (US), EN 1092-1 (Europe), GB/T9112 (China), and the HG/T20592/HG/T20615 chemical industry standards. Thread specifications can be customized to client requirements-such as NPT or BSPT-which is crucial given that incompatible thread systems cannot be interchanged; an incorrect choice makes achieving an effective seal after assembly difficult. Pressure ratings range from PN6 to PN40, with a primary focus on ASME Class 150 and Class 300. The standard sealing face is Raised Face (RF), though Flat Face (FF) options are available upon request to suit various gasket types.
We offer a wide range of materials, with stable supplies of carbon steel (A105, 20#, Q235) and stainless steel (304, 316L, 321). Threaded flanges serve as an excellent solution for alloy steels that are difficult to weld, effectively bypassing welding challenges. All blanks are integrally forged, and threads undergo precision machining to ensure uniform profiles, thereby minimizing the risk of thread stripping or jamming during assembly. Products undergo visual, dimensional, and thread inspections before shipment; MTR (Material Test Reports) are provided upon request to meet material traceability requirements for overseas EPC projects. Carbon steel flanges can be treated with anti-rust oil or black paint to prevent corrosion during maritime transport.
Our threaded flanges are regularly exported to markets in the Middle East, Southeast Asia, and Europe, where they are widely used in fire sprinkler systems, instrumentation piping, air compressor lines, and water treatment auxiliary piping. We can quickly arrange shipment for small, in-stock orders and maintain stable production schedules for large-scale project orders. Export packaging includes thread protection and protective films on sealing faces to prevent damage from impacts during transit; we also provide complete customs documentation and facilitate third-party inspections. If you are looking for a reliable supplier of threaded flanges-or need assistance selecting the right specifications based on your project's operating conditions-please send us details regarding project standards, nominal bore, thread type, material, and pressure ratings. Our technical team will promptly evaluate your requirements and provide a suitable proposal and quotation.
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