Top 10 Blank flange factory in the World 2025

Are you tired of sifting through countless options for blank flanges? Choosing the right factory can make all the difference! By comparing the top manufacturers, you’ll uncover quality, reliability, and cost-effectiveness. Ready to discover the best choices? Let’s dive in and simplify your decision-making process!

Blank Flanges – McMaster-Carr

ISO-F Blank Flange | Redline Chambers

Carbon, Steel, & Alloy Pipe Flanges – Coastal Flange, Inc.

ANSI B16.5 Class 300 Carbon Steel Blank Flange – ValvesTubesFittings

Product Details: ANSI B16.5 Class-300 Carbon Steel Raised Face Blank Flange, made of black (self-colour) carbon steel to ASTM A105, used to cap or blank off the end of a flanged pipeline.

Technical Parameters:
– Maximum operating pressure: 51.7 bar (up to 38°C)
– Operating temperature range: -29°C – 538°C

Application Scenarios:
– Capping or blanking off the end of a flanged pipeline
– Used in high-pressure piping systems

Pros:
– Raised sealing face increases pressure on the gasket for a strong seal
– Conforms to ASME/ANSI B16.5:2017 standards

Cons:
– Operating pressure/temperature should not exceed the rating of the connected pip…
– Material test certificate must be requested at the time of order

Golden Glory International Group Co., Ltd

ISO-LFB Blank Flange – ANCORP | High and Ultra-High Vacuum Products

Product Details: ISO-LFB Blank Flange is designed to close unused ports and can be customized by users with their own machining capabilities. It is compatible with all ISO standard vacuum flanges and fittings.

Technical Parameters:
– High Vacuum Rated to 1×10-8 Torr
– Bakeable to 200°C

Application Scenarios:
– Closing unused ports in vacuum systems
– Custom modifications for specific applications

Pros:
– Compatible with standard inch tubing O.D.’s
– Good choice for custom modification

Cons:
– No weld prep and no tubing bore
– Limited to specific materials (304L Stainless Steel, 6061 Aluminum)

BS EN 1092-1 Mild Steel Blank Plate Flange (PN16) – ValvesTubesFittings

Product Details: BS EN 1092-1 Mild Steel Blank Plate Flange (PN16) made of black (self-colour) S235JR mild steel plate, used to cap or blank off the end of a flanged pipeline.

Technical Parameters:
– Operating temperature range: -10°C – 400°C
– Maximum Operating Pressure: 16 bar

Application Scenarios:
– Capping or blanking off the end of a flanged pipeline
– Used in various industrial piping systems

Pros:
– Conforms to BS EN 1092-1 standard
– Available with 3.1 test certification upon request

Cons:
– Operating pressure/temperature should not exceed the rating of the connected pip…
– Weight and specific dimensions not provided in the data

ISO-F HV Blank Flanges (Aluminum 6061-T6) – Lesker

Delaware Manufacturing Industries Corp FLB6-1000SK BLANK FLANGE – Motion

16 Blank Flange Manufacturers in 2025 | Metoree

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Frequently Asked Questions (FAQs)

What is a blank flange and what is its purpose?

A blank flange is a solid disc used to seal off the end of a pipe or vessel. It serves to close off a piping system, preventing the flow of fluids or gases. Blank flanges are essential in maintenance and testing, allowing you to isolate sections of a system for repairs or inspections.

What materials are commonly used to manufacture blank flanges?

Blank flanges can be made from various materials, including carbon steel, stainless steel, and alloy steel. The choice of material depends on the application, environmental conditions, and required strength. Each material offers different benefits, such as corrosion resistance or durability.

How do I choose the right size blank flange for my project?

To choose the right size blank flange, you need to know the diameter and pressure rating of your piping system. Measure the pipe’s outer diameter and refer to industry standards to match the flange size. It’s crucial to ensure compatibility for a proper seal.

Can blank flanges be customized for specific applications?

Yes, many factories offer customization options for blank flanges. You can request specific dimensions, materials, and pressure ratings tailored to your needs. Custom flanges ensure a perfect fit and functionality for specialized applications.

What is the typical lead time for ordering blank flanges?

Lead times for blank flanges can vary based on factors like material availability and customization requirements. Generally, standard flanges may take a few days to a couple of weeks, while custom orders might take longer. It’s best to check with the manufacturer for precise timelines.