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Blind Flanges Overview

Introduction

Blind flanges are essential components in the piping industry, primarily used to seal the ends of piping systems. Designed as solid round plates with no center hole and featuring appropriately placed bolt holes, blind flanges provide a positive close on pipes, valves, or equipment nozzles. Their versatility allows them to be available in various sizes and materials, making them suitable for a wide range of applications.

What is a Blind Flange?

A blind flange is a flat disc used to cover and close the ends of piping systems. Its design eliminates a central opening, allowing it to effectively seal off sections of a pipeline while providing a means for connection through the surrounding bolt holes. This feature facilitates easy access to the sealed line for future modifications or repairs when necessary.

Key Benefits of Blind Flanges

1. Positive Closure: Blind flanges provide a secure closure for pipes and equipment nozzles, preventing leaks and ensuring the integrity of the system.

2. Ease of Access: Once a line is sealed, the blind flange allows for straightforward access if maintenance or modifications are required at a later date.

3. Customizability: Blind flanges can be custom made or machined to accommodate specific pipe sizes or to manage reductions in pipe diameter, whether through threaded or welded connections.

4. Versatile Use: They are used in various applications, including water, gas, and chemical industries, where the sealing off of sections of piping is necessary.

Detailed Product Specifications

• Size Range: From ½” NB to 50” NB
• Pressure Classes: Available in 150#, 300#, 400#, 600#, 900#, 1500#, and 2500#

Material Specifications

Our blind flanges are manufactured using a variety of high-quality materials to ensure reliability and performance across different applications:

• Stainless Steel: TP 304, 304L, 316, 316L, 316Ti, 309, 310, 310S, 317L, 321, 347
• Carbon Steel: ASTM A 105/106, ASTM A 181
• Alloy Steel: ASTM A 182, GR F1, F11, F22, F5, F9, F91
• Non-Ferrous Metals: Copper, Brass, Gun Metal
• Nickel Alloys: Monel 400 & 500, Inconel 600 & 625, Incolloy 800 & 825, Hastelloy C22 & C276
• Duplex Steel: ASTM/ASME A182 F 44, F 45, F 51, F 53, F 55, F 60, F 61

Industry Standards

Our blind flanges are manufactured in compliance with recognized industry standards, ensuring compatibility and quality:

• ANSI Flanges: ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
• DIN Flanges: DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, and others.

Conclusion

Blind flanges are vital for closing off piping systems while allowing for easy access and modifications when necessary. With their robust construction and customizable options, our blind flanges are designed to meet the diverse needs of various industries, ensuring secure and reliable piping solutions.

Call to Action

To explore our range of high-quality blind flanges or to discuss your specific needs, please contact our expert team today. We are committed to providing the ideal solutions for your piping applications while ensuring quality and performance across all of our products. Let us be your trusted partner in fulfilling your flange requirements!