Tag: Flange
Flange Facing Types Explained The flange facing (sealing surface) is critical for creating a leak-tight joint. Different facing types are designed for specific pressure ranges, temperatures, and sealing requirements. Raised Face (RF) Most Common Type Raised sealing surface (1.6mm or 6.4mm height) Concentric or spiral serrations for gasket grip Suitable for Class 150-2500 Works with […]
Threaded Flange Overview A Threaded Flange connects to pipes using internal threads, eliminating the need for welding. This makes threaded flanges ideal for applications where welding is impractical or where quick installation and disassembly are required. Design Characteristics Internal threads match pipe external threads (NPT or BSP) No welding required for installation Tapered threads create […]
Understanding Lap Joint Flanges A Lap Joint Flange consists of two components: a stub end and a backing flange. The stub end is butt-welded to the pipe, while the backing flange rotates freely around it, allowing for easy bolt hole alignment during assembly. Design Features Two-piece construction: stub end + backing flange Backing flange rotates […]
What is a Socket Weld Flange A Socket Weld Flange is designed for small-bore, high-pressure piping systems. The pipe is inserted into a recessed socket area and fillet welded to the flange hub, creating a strong, leak-proof connection. Key Features Socket bore matches pipe outer diameter for precise fit Fillet weld provides strong mechanical connection […]
Flange Standards Overview Flange design, manufacturing, and inspection must follow strict international and national standards. Understanding different standard systems is crucial for proper flange selection. ASME Standards (American) ASME B16.5: NPS 1/2 to 24 Pressure Classes: 150, 300, 600, 900, 1500, 2500 Face Types: RF, FF, RTJ, MFM EN Standards (European) EN 1092-1: Main European […]
Function and Purpose A Blind Flange is a solid flange without a center opening, used to close off the end of pipes, valves, or pressure vessels. It serves as a terminal closure component, playing a critical role during maintenance, inspection, or system expansion. Main Applications Pipe Closure: Seal pipe ends to prevent medium leakage System […]
Slip On Flange Overview A Slip On Flange (SO Flange) is a flange type where the pipe is inserted into the flange bore and then fillet welded both inside and outside. Due to easy installation and lower cost, slip on flanges are among the most commonly used flanges in medium-low pressure piping systems. Main Advantages […]
What is a Weld Neck Flange A Weld Neck Flange features a long tapered hub that is butt-welded to the pipe. It is the most commonly used flange type for high pressure, high temperature, and low temperature applications. Key Advantages Superior stress distribution with tapered hub design High strength connection comparable to pipe itself Handles […]
Flange Basics A flange is one of the most critical connection components in industrial piping systems, used to connect pipes, valves, pumps, and other equipment. Main Functions Connection: Reliably join pipe sections Sealing: Work with gaskets Maintenance: Removable design Flexibility: Direction changes Common Types Weld Neck: High pressure and temperature Slip On: Easy installation, lower […]
Mastering ASME B16.5 Flange Dimensions A flange size chart ensures proper fit-up, bolt alignment, and gasket seating. Misreading tables leads to costly mistakes. Key Dimension Parameters NPS Nominal Pipe Size (not actual OD for 14 inch+) Class Pressure rating: 150, 300, 600, 900, 1500, 2500 Outside Diameter Overall flange diameter Thickness Flange thickness at hub […]
Choosing the Right Flange Material Material selection is critical. Wrong choice leads to premature failure, corrosion, and safety incidents. Carbon Steel Flanges ASTM A105 Industry workhorse for general service. Applications: Oil/gas pipelines, petrochemical, power generation Temperature: -20F to 800F Tensile: 70,000 psi min ASTM A350 LF2 Low-temperature with Charpy testing. Applications: LNG, cryogenic, cold climate […]
What Are Orifice Flanges and How Do They Work Orifice flanges are specialized piping components designed for precise flow measurement in pressurized systems. Unlike standard weld neck flanges, orifice flanges feature tapped holes (pressure taps) drilled radially through the base, enabling accurate differential pressure readings across an orifice plate. At Songhai Flange, we understand that […]