Threaded Flanges — Easy Installation | Ideal for Low-Pressure Systems

Threaded Flanges (Screwed Flanges) — Quick, Reliable, Non-Welded Piping Connections

Threaded Flanges (also known as Screwed Flanges) are designed for quick and reliable piping connections without the need for welding. These flanges feature an internal thread that matches the external thread on the pipe, allowing for easy assembly and disassembly — making them ideal for systems where welding is impractical or undesirable.

Standards & Pressure Ratings

Threaded flanges are manufactured to international dimensional and pressure standards to ensure compatibility and performance:

• ASME B16.5 — Available in Class 150, 300, 600, 900, and 1500 ratings
• DIN / EN Standards — Thread dimensions typically follow ISO 7-1 or ANSI B1.20.1 depending on region and application

Key Features

• No Welding Required — Ideal for applications where hot work is restricted.
• Reusable Connection — Can be easily removed and reinstalled for maintenance or replacement.
• Accurate Threading — Precision-machined threads ensure a tight, secure fit with minimal leakage risk.
• Standardized Dimensions — Interchangeable with pipes and fittings conforming to relevant standards.
• Wide Material Options — Available in carbon steel, stainless steel, and special alloys to suit different media and conditions.

Typical Dimensions

• Nominal Sizes: ½” to 24” (DN15–DN600)
• Pressure Ratings: Class 150 to Class 1500 (ASME) / PN6–PN40 (DIN)
• Thread Types: NPT (ANSI B1.20.1), BSPT (ISO 7-1), or others on request
• Face Types: Raised Face (RF) or Flat Face (FF) depending on application requirements

Applications

• Low-pressure piping systems
• Non-permanent joints where dismantling is required
• Small-diameter piping (usually DN50 and below)
• Hazardous environments where welding is restricted
• Utilities, water supply, compressed air, fuel lines, and fire protection systems