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Stainless Steel Flange Specification

Views: 0     Author: Site Editor     Publish Time: 2023-12-20      Origin: Site


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Stainless Steel Flange Specification


Stainless steel flanges are essential components in various industrial applications, known for their strength, durability, and corrosion resistance. In this article, we will delve into the specifications of stainless steel flanges, the different connection types available, and important details about stainless steel and the ASME B16.5 standard for stainless steel pipe flanges.

Stainless Steel Flange

Stainless steel flanges are crucial components used to connect pipes, valves, and equipment in a wide range of industries, including oil and gas, chemical, petrochemical, and more. These flanges are designed to provide a secure and leak-free connection, ensuring the safe and efficient operation of pipelines and systems.

Connection Types for Stainless Steel Flanges

Stainless steel flanges come in several connection types, each suited for specific applications. The most common connection types include:

Weld Neck Flanges: Weld neck flanges are designed with a tapered neck that is welded to the pipe. They offer exceptional strength and are suitable for high-pressure and high-temperature applications.

Slip-On Flanges: Slip-on flanges slide over the pipe and are then welded in place. They are cost-effective and ideal for low-pressure systems or applications where frequent disassembly is not required.

Threaded Flanges: Threaded flanges have internal threads that allow them to be screwed onto the pipe. They are commonly used in smaller pipe sizes and low-pressure systems, providing ease of assembly and disassembly.

Blind Flanges: Blind flanges are solid discs used to seal the end of a pipe or vessel. They are essential for closing off unused pipelines or for pressure testing.

Socket Weld Flanges: Socket weld flanges have a socket that fits over the pipe's end, which is then fillet welded. They are primarily used for small-diameter, high-pressure applications.

Lap Joint Flanges: Lap joint flanges consist of two parts – a stub end and a backing flange. The stub end is welded to the pipe, while the backing flange is loose, allowing for easy alignment and quick disassembly.

About Stainless Steel

Stainless steel is a versatile and corrosion-resistant material that is a popular choice for flange construction. It contains chromium, which forms a passive oxide layer on the surface, preventing rust and corrosion. Stainless steel is available in various grades, with 304 and 316 being the most common for flange applications. These grades offer excellent corrosion resistance and durability in a wide range of environments.

ASME B16.5 - Popular Standard for Stainless Steel Pipe Flange

ASME B16.5 is a widely recognized standard that specifies the dimensions, tolerances, and materials for stainless steel pipe flanges. This standard provides guidance on flange sizes, pressure ratings, and facing types. It ensures compatibility and interchangeability between different manufacturers' flanges, making it easier for industries to source and use stainless steel flanges reliably.


Stainless steel flanges are essential components in industries where reliable and leak-free connections are critical. Understanding the various connection types, the properties of stainless steel, and the relevance of standards like ASME B16.5 is crucial when selecting the right stainless steel flanges for your specific applications. These specifications ensure that stainless steel flanges provide the strength, durability, and corrosion resistance required for a wide range of industrial needs.

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