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Why Forged A105 Steel is Essential for 2" Threaded Pipe Flanges in Class 150 Systems

Categories:Technical Articles Time of issue:2026-01-20 Hits:16
(Summary description)introductionin industrial piping, the 2" threaded pipe flange is one of the most versatile and frequently specified components. whether used in water treatment, oil and gas, or chemical processing, the integrity of this connection is vital. however, not all flanges are created equal. for high-stakes environments, choosing a class 150 a105 forged steel flange over cast alternatives is the difference between long-term reliability and catastrophic failure.
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Introduction

In industrial piping, the 2" Threaded Pipe Flange is one of the most versatile and frequently specified components. Whether used in water treatment, oil and gas, or chemical processing, the integrity of this connection is vital. However, not all flanges are created equal. For high-stakes environments, choosing a Class 150 A105 Forged Steel flange over cast alternatives is the difference between long-term reliability and catastrophic failure.

The Superiority of Forged A105 Steel

ASTM A105 is the industry standard for forged carbon steel piping components. But what makes "Forged" so important for a 2 inch NPT flange?

  • Grain Structure: Forging aligns the grain flow of the steel to the shape of the flange, providing superior strength and resistance to impact and fatigue.

  • Zero Porosity: Unlike casting, which can have internal gas pockets or voids, the forging process ensures a dense, homogenous metal structure.

  • Temperature Resilience: Our A105 Forged Steel Class 150 flanges are designed to perform reliably in service temperatures ranging from ambient to $425^\circ C$ ($800^\circ F$).

Precision NPT Standards for 2" Connections

The seal of a 2" threaded pipe flange depends entirely on the quality of its threads. Following the NPT (National Pipe Thread) Standard, our flanges feature tapered threads that create a mechanical seal by compressing the thread flanks.

For a 2-inch connection, precision is key. If the thread taper is off by even a fraction, the risk of "galling" during installation or leaking under pressure increases significantly. Our CNC-machined 2 inch forged steel flanges undergo rigorous plug-gauge testing to ensure perfect compatibility with any standard 2" pipe.

Technical Specifications: 2" Class 150 ASME B16.5

When integrating a 2" NPT standard flange into your system, keep these ASME B16.5 dimensions in mind:

  • Outside Diameter (OD): 6.00 inches (152.4 mm)

  • Bolt Circle Diameter: 4.75 inches (120.6 mm)

  • Number of Bolt Holes: 4

  • Thread Type: 2" NPT (tapered)

Applications for the 2" Carbon Steel Threaded Flange

Due to its robust Class 150 rating and ease of assembly (requiring no welding), the 2" A105 threaded flange is the preferred choice for:

  1. Modular Skid Building: Ideal for tight spaces where welding torches cannot maneuver.

  2. Fire Protection Systems: Reliable, high-strength connections for main water lines.

  3. Compressed Air Piping: Secure sealing for large-scale industrial pneumatic systems.

Conclusion

Investing in a high-quality 2" Threaded Pipe Flange made from A105 Forged Steel ensures your project meets the highest safety and compliance standards. Don't compromise on quality—ensure your ASME B16.5 connections are forged for performance.

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