Forged Flanges

Forged Flanges – A Complete Guide

Forged flanges are essential components used in piping systems to connect pipes, valves, pumps, and other equipment. They provide a secure, leak-proof joint that can handle high pressure, high temperature, and corrosive environments. Forged flanges are manufactured through a forging process, which involves shaping heated metal under high pressure, resulting in superior strength and durability compared to cast flanges.

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What Are Forged Flanges?

Forged flanges are created by heating steel billets and then pressing or hammering them to the required shape using hydraulic or mechanical presses. This process improves the grain structure of the material, providing greater mechanical properties such as:

• High tensile strength

• Excellent toughness

• Better fatigue resistance

• Enhanced corrosion and pressure resistance

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Types of Forged Flanges

Common types include:

• Weld Neck Flange

• Slip-On Flange

• Blind Flange

• Threaded Flange

• Socket Weld Flange

• Lap Joint Flange

• Long Weld Neck Flange

• Orifice Flange

Each type is designed for specific applications and installation requirements.

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Materials Used

Forged flanges are typically made from:

• Carbon Steel (A105, A350 LF2)

• Alloy Steel (F11, F22)

• Stainless Steel (304, 316, 321)

• Duplex & Super Duplex Stainless Steel

• Nickel Alloys, Inconel, Monel, Hastelloy

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Manufacturing Standards

Forged flanges are produced according to international standards such as:

• ASTM / ASME

• ANSI / API / DIN

• BS / EN / JIS

• MSS-SP

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Applications of Forged Flanges

Forged flanges are widely used across industries, including:

• Oil & Gas

• Petrochemical & Refinery

• Water Supply Systems

• Power Generation

• Shipbuilding

• Pharmaceutical & Food Processing

• Construction & Heavy Engineering

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Advantages of Forged Flanges