Blind flanges are used across industrial piping systems to close the end of a line, isolate equipment, or allow future pipeline extensions. In industries where testing, maintenance, or temporary shutdowns are part of routine operations, blind flanges play a key role by providing a secure seal that can handle pressure and environmental stress. These flanges are commonly used in process plants, fabrication shops, oil and gas facilities, water treatment units and general industrial piping networks.
Many industrial users also pair blind flanges with weld neck flanges when creating termination points or test sections on high-pressure lines.
A blind flange does not have a center opening, which allows it to stop the flow in a pipeline. This makes it useful for pressure testing and inspection points. Industrial users often install blind flanges when a line may need to expand later, as they can be removed and replaced with other flange types without altering the main pipeline. Trupply offers blind flanges in various sizes and materials designed for commercial and industrial plumbing, mechanical and process applications.
Blind flanges are available in multiple size options, including commonly used 4 blind flange, 6 blind flange and 8 blind flange configurations. These sizes are widely used in industrial environments where different flow capacities and pipe diameters must be closed off securely.
Material selection is an important factor. Stainless steel blind flanges are often used in applications involving corrosive fluids, outdoor conditions, or sanitary requirements. Carbon steel blind flanges are typically used in high-pressure lines, mechanical pipeline systems and general industrial applications. Both materials support strong sealing performance when paired with the correct gasket and bolting setup.
Manufacturing standards such as ASME and ANSI dimensions help maintain compatibility with standard pipe flanges used in industrial piping. This makes it easier for maintenance teams and installers to match blind flanges with existing systems.
Blind flanges are used across industries such as refining, chemical processing, manufacturing, HVAC and structural piping. They serve several purposes:
Because blind flanges are simple to install and remove, they are frequently used in pipelines where system adjustments or future connections are expected.
Trupply offers a collection of blind flanges suitable for a wide range of industrial and commercial uses. Customers can select from different sizes, materials and pressure ratings to match their specific project needs. Blind flanges also work well alongside weld neck flanges, industrial gaskets and flange bolting hardware to maintain consistency across piping systems.
Size & Dimension table for Flanges
A105 - The standard forged carbon steel piping components for ambient and high temperature / pressure systems
SS304 - A common standard for stainless steel due to its malleability, high corrosive resistance weld-ability
SS316 - A molybdenum stainless steel that provides excellent tensile, creep and stress-rupture strengths at elevated temperatures
Material Description for Flanges
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I bought the wrong fittings and then ordered the correct ones. I have reached out multiple times and I see about how to return the wrong fittings and have gotten no response. I’m happy with what I got I’m just not happy you’re not responding and sticking me with the incorrect ones
Dresser Gasket | 365 Graphite Fiber | High Temp
I need the MTR, I did pass a mail respect
It would be easy for you to post photos of what you’re actually buying.
Who would purchase 1/2 of a Union? Especially knowing that they are all different and not interchangeable.
