A ‌Threaded Flange‌  is a specialized pipe flange designed for quick, weld-free connections in piping systems.  

1. ‌Design & Connection Mechanism‌

• ‌Threaded Bore‌: The flange’s inner hole is machined with pipe threads (e.g., NPT, BSPT) to screw onto threaded pipes or fittings‌.

• ‌No Welding Required‌: Eliminates welding, making it ideal for hazardous or confined spaces where welding is impractical or prohibited‌.

2. ‌Key Advantages‌

• ‌Easy Installation/Maintenance‌: Suitable for small-diameter pipes (typically ≤DN50) and low-pressure systems‌.
• ‌Material Flexibility‌: Often used with alloy steels that are difficult to weld (e.g., high-carbon steels)‌.
• ‌Cost-Effective‌: Lower labor costs compared to welded flanges but may have higher material costs due to thicker construction‌.

3. ‌Limitations‌

• ‌Pressure/Temperature Constraints‌: Not recommended for systems with rapid temperature fluctuations or extremes (>260°C or <-45°C) due to potential thread leakage‌.

• ‌Structural Weakness‌: Threads can strip under high vibration or cyclic loading‌.

4. ‌Common Applications‌

• ‌Utility Lines‌: Water, air, or gas pipelines in HVAC and plumbing‌.
• ‌Hazardous Areas‌: Oil/gas facilities where welding sparks pose risks‌.
• ‌Temporary Setups‌: Easy disassembly for maintenance or inspections‌.

5. ‌Standards & Materials‌

• ‌Standards‌: ANSI B16.5, DIN, GOST, and GB/T‌23.
• ‌Materials‌: Carbon steel (A105), stainless steel (304/316).