FLANGE

1. Product Overview

A flange is a metal ring (steel or stainless steel) with bolt holes, attached to the pipe end by welding or threading. When connected, two flange faces compress a gasket in between, forming a completely sealed system capable of withstanding high pressure.

2. Standard Technical Specifications

3. Common Flange Types

• Slip-on flange: Inner diameter slightly larger than the pipe, allowing the pipe to slip in and be welded both inside and outside. Most common type due to easy installation.
• Blind flange: Solid plate with no center hole, used to block pipe ends or future expansion points.
• Welding neck flange: Long neck for butt-welding to the pipe. Withstands extremely high pressure and temperature, commonly used in petrochemical plants.
• Threaded flange: Connects to pipes via threads, suitable for locations where welding is not possible or for low-pressure systems.

4. Key Advantages

• Easy maintenance: Simply remove bolts to detach pumps, meters, or valves for repair without cutting the pipe.
• High sealing capability: With high-strength bolts and proper gaskets, flanges can withstand tanker or depot pressures.
• Flexibility: Allows transition between different pipe materials (e.g., steel to stainless steel) through flange connections.

5. Practical Applications in Fuel Systems

• Pump connections: Installed at suction and discharge ends of gear or screw pumps.
• Valve installation: Large ball valves or gate valves require flange connections.
• Storage tanks: Used on manholes or main fuel inlet/outlet lines.