This reference page provides the listed dimensions, bolting information, weight, and CAD resource for a Blind Flange 12 Inch Class 2500. Use it when checking a piping layout, coordinating a flange connection, or preparing fabrication and drafting documentation.
The flange is identified by nominal pipe size and pressure class, while the dimension list provides the physical information needed for preliminary layout and component comparison. For procurement, fabrication, and installation, confirm the project specification and the complete flange assembly requirements.
Blind Flange 12″ Class 2500
Blind Flange 12″ 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 12″ Class 2500 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 12″
- DN Size: DN300
- Flange Thickness: 184.2mm
- Weight: 575kg
- Stud Bolt Size: 2 3/4″ UNC (or M72) x 540 Long
- Number of Bolts: 12
- Hole Diameter: 2 7/8″ (73.025mm)
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 12″ 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 12″ 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 closes a piping connection without providing a flow passage. Because it can be removed later, it is useful at equipment connections, isolation points, and locations reserved for inspection, maintenance, or future line work. The connection still depends on correct gasket selection, bolting, facing compatibility, and installation practice.
Understanding the Listed Data
- Nominal size: The NPS and DN designations identify the nominal connection size; they should not be treated as a direct measurement of every flange feature.
- Thickness and weight: These values support layout review, handling planning, and comparison with other flange references. They do not by themselves establish allowable service conditions.
- Stud bolt information: The listed thread designation, alternate metric designation, length, and bolt count should be checked against the selected gasket, flange facing, nuts, washers, and assembly procedure.
- Hole diameter: This is a flange detail for connection coordination. Confirm that the mating flange and bolting arrangement are compatible before fabrication or installation.
Design and Drafting Checks
When using the CAD drawing, check the flange outline, bolt-hole layout, facing details, and orientation against the project piping model. Pair this page with the site’s blind flange dimensions, flange bolt size, pipe schedule, and CAD/DWG piping resources to compare related components without assuming that another pressure class or flange standard has the same geometry.
The cited standard provides the basis for the listed dimension data, but project requirements may impose additional conditions. Confirm material specification, pressure-temperature limitations, gasket type, bolting, corrosion requirements, and any owner or fabricator requirements before release for manufacture.
Blind Flange 12 Inch Class 2500 FAQ
What is a Blind Flange 12 Inch Class 2500 used for?
It is used to close a piping end, equipment connection, valve connection, or other flanged opening where a removable closure is required. The source page also identifies maintenance isolation and future expansion as common uses.
Does a blind flange have a center bore?
No. A blind flange is a solid flange without a center bore, so it blocks the connected opening rather than providing a passage for fluid.
What bolt information is listed for this flange?
The source data lists the stud bolt designation, an alternate metric designation, the specified length, and the number of bolts. Verify the complete bolting arrangement with the mating flange and project specification.
Can the CAD file be used directly for fabrication?
The CAD file is intended for drafting, detailing, and piping layout coordination. Before fabrication, verify the drawing against the applicable standard, approved project documents, material requirements, gasket arrangement, and fabrication tolerances.
Does Class 2500 alone determine the allowable pressure?
No. A pressure class designation must be evaluated with the applicable standard, material, temperature, flange configuration, and project requirements. The listed dimensions should not be used as a substitute for pressure-temperature verification.