This reference page covers the dimensional and identification information for a Blind Flange 10 Inch Class 2500. Use it when checking a piping drawing, coordinating a flange connection, reviewing a maintenance blank, or locating a CAD file for layout work.
The page separates the flange designation from the practical details needed for drafting and field coordination. The existing reference data identifies the nominal size, metric equivalent, thickness, weight, stud bolt requirement, bolt count, and hole diameter. Always compare those details with the project specification and the mating flange before release for fabrication or installation.
Blind Flange 10″ Class 2500
Blind Flange 10″ Class 2500 is used to seal the end of a piping system or close off a flange connection in Class 2500 service. It is a solid flange without a center bore and is commonly used in industrial piping systems, maintenance isolation points, and future pipeline expansion connections where an extremely high pressure rating is required.
This dimension data is based on ANSI / ASME B16.5-2020.
Blind Flange 10″ Class 2500 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 10″
- DN Size: DN250
- Flange Thickness: 165.1mm
- Weight: 470kg
- Stud Bolt Size: 2 1/2″ UNC (or M64) x 490 Long
- Number of Bolts: 12
- Hole Diameter: 2 5/8″ (66.675mm)
What Is a Blind Flange?
A blind flange is a blank flange used to close the end of a pipeline, vessel nozzle, or equipment connection. It provides a secure shutoff point and is often selected when future maintenance, inspection, or line extension may be required.
Common Applications
Blind Flange 10″ Class 2500 is commonly used for:
- Pipe end closure
- Equipment isolation
- Valve and nozzle blanking
- Maintenance shutdown work
- Process and utility piping systems
- Extremely high pressure piping applications
CAD Drawing Download
This page includes the CAD drawing file for Blind Flange 10″ Class 2500, which can be used for drafting, detailing, and piping layout coordination.
Available Blind Flange Class 2500 Sizes
This size is part of the Blind Flange Class 2500 series. Check other sizes in the same category to find matching dimension data and CAD files for your project.
Notes
Before fabrication or installation, always confirm the latest project requirements, flange material specification, gasket type, bolt length, and applicable pressure-temperature rating.
How to Use This Blind Flange Reference
A blind flange has no center opening, so its primary function is to close a flanged connection rather than provide a passage for fluid. In a drawing, it may represent a permanent end closure, a temporary maintenance blank, an equipment isolation point, or a connection reserved for future work.
The NPS designation identifies the nominal pipe size used in the piping system, while the listed DN designation provides the corresponding metric identification. These labels help with document coordination, but they should not be used alone to select a flange. Mating dimensions, facing details, material requirements, gasket selection, bolting, and the applicable pressure-temperature rating must also be checked.
Reference Data and Drafting Use
- Flange thickness: Use this when checking elevation, projection, and the overall stack-up at the connection.
- Weight: Consider it during handling, support, lifting, and equipment-access reviews.
- Stud bolt size and length: Confirm that the specified bolting matches the joint arrangement, flange materials, gasket, and installation requirements.
- Number of bolts and hole diameter: Use these details to coordinate the bolt circle pattern and verify compatibility with the mating flange.
- CAD drawing: Use the downloadable file as a drafting aid, then verify orientation, facing, tolerances, and project-specific requirements before fabrication.
Related Piping References
For broader design and drafting work, compare this page with references for pipe flange dimensions, flange bolt patterns, gasket selection, stud bolts, and piping isometric drawings. These related topics help explain how a blind flange fits into a complete piping connection rather than treating the flange as an isolated component.
The Class 2500 designation should be reviewed together with the material and operating conditions. It is not, by itself, a substitute for the project pressure-temperature rating review. The source notes on this page should be followed before fabrication or installation.
Blind Flange 10 Inch Class 2500 FAQ
What is a blind flange used for?
A blind flange closes the end of a pipe, vessel nozzle, valve connection, or other flanged opening. It can support isolation, maintenance work, equipment blanking, or a future connection, subject to the project design and safety procedures.
Does a blind flange have a center bore?
No. A blind flange is a solid flange without a center bore. Its face and bolt-hole arrangement allow it to close a compatible flanged connection.
What information is listed for this flange?
The reference identifies the standard, nominal pipe size, DN designation, flange thickness, weight, stud bolt size and length, number of bolts, and hole diameter. These values are provided in the source data on this page.
Is the listed stud bolt size interchangeable with any other bolting?
Do not assume interchangeability. The listed bolting must be checked against the mating flange, joint design, material specification, gasket, installation procedure, and applicable project requirements. The metric notation shown in the source should be treated as an identification detail, not an automatic substitution instruction.
Can the CAD file be used directly for fabrication?
The CAD file is intended to support drafting, detailing, and piping layout coordination. Before fabrication, verify the drawing against the governing project documents, the applicable flange requirements, mating components, and any required tolerances or facing details.
What should be checked before installation?
Confirm the flange material, gasket type, bolting, mating flange, pressure-temperature rating, joint condition, and current project requirements. Installation should follow the responsible engineer’s design and the applicable site procedure.