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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 […]
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 […]
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 […]
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 […]
Understanding Flange Pressure Ratings Flange pressure rating indicates the maximum pressure a flange can safely withstand at a specific temperature. Selecting the correct rating is critical for system safety and compliance. ASME Pressure Classes Class Max Pressure (bar) Max Pressure (psi) Typical Applications Class 150 19.6 285 Low pressure water, air, general service Class 300 […]
# How Penetrant Testing Ensures High-Quality Stainless Steel Flanges Published: April 12, 2026 | Category: Quality Control Flange penetrant testing ensures high-quality stainless steel flanges by detecting surface defects before they affect sealing performance or structural integrity. It reveals cracks, porosity, and discontinuities that are often invisible during routine inspection. This allows manufacturers to verify […]
# Complete Guide to Stainless Steel Flange Types and Applications Published: April 12, 2026 | Category: Product Guide Choosing the right flange type is critical for ensuring safe, leak-free connections in piping systems. This comprehensive guide covers the main types of stainless steel flanges and their optimal applications across various industries. Weld Neck Flanges Features […]
# Flange Material Selection Guide: Choosing the Right Stainless Steel Grade Published: April 12, 2026 | Category: Technical Guide Selecting the correct material for your flanges is one of the most critical decisions in piping system design. The right choice ensures long service life, reliable performance, and cost-effectiveness. This guide helps you navigate the complex […]
# Proper Flange Installation and Maintenance: Best Practices Guide Published: April 12, 2026 | Category: Technical Guide Proper flange installation and maintenance are critical for ensuring leak-free operation, maximizing service life, and maintaining system safety. This comprehensive guide covers industry best practices for flange installation, bolt-up procedures, and ongoing maintenance. Pre-Installation Inspection Flange Inspection Checklist […]
# Flange Industry Standards and Quality Control: A Comprehensive Overview Published: April 12, 2026 | Category: Industry Standards Understanding flange industry standards and quality control requirements is essential for ensuring safe, reliable piping systems. This guide covers the major international standards, certification requirements, and quality assurance practices for flange manufacturing. Major International Flange Standards ASME/ANSI […]
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 […]
Why Proper Flange Bolt Torque Prevents Costly Leaks Incorrect bolt torque is a leading cause of flange joint failures. Applying correct torque ensures proper gasket compression and prevents shutdowns and safety incidents. Target Torque Calculation Formula ASME PCC-1 Appendix K formula: T = K x D x F / N T = Target torque per […]