This reference page covers the dimensions and identification details for a Blind Flange 8 Inch Class 2500. Use it to review the published flange thickness, weight, stud bolt information, bolt count, and hole diameter before coordinating piping drawings or related components.
The page also explains how a blind flange functions, where this type of flange is commonly applied, and how the available CAD file can support drafting and layout work. Always compare the reference data with the project specification and installation requirements before release for fabrication.
Blind Flange 8″ Class 2500
Blind Flange 8″ 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 8″ Class 2500 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 8″
- DN Size: DN200
- Flange Thickness: 127mm
- Weight: 241kg
- Stud Bolt Size: 2″ UNC (or M52) x 380 Long
- Number of Bolts: 12
- Hole Diameter: 2 1/8″ (53.975mm)
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 8″ 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 8″ 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
The source dimensions identify the flange through several complementary systems. NPS 8 and DN200 describe the nominal pipe size using U.S. customary and metric designations. The flange thickness and listed weight are useful for checking drawing annotations, material takeoffs, handling planning, and coordination with connected piping or equipment.
The fastening information should be read as a coordinated set. The page lists the stud bolt size and length, the number of bolts, and the hole diameter. These details help drafters and engineers check the flange connection arrangement, but they do not replace project-specific verification of the gasket, bolting specification, material, facing, or pressure-temperature requirements.
Blind Flange and Connection Planning
Unlike a weld neck, slip-on, or threaded flange, a blind flange has no center bore. Its solid face closes a flanged connection or pipe end. Because the connection can be opened later, blind flanges may be considered during maintenance isolation, equipment blanking, inspection planning, or future line-extension work.
When reviewing related piping components, compare the blind flange with the mating flange, gasket, studs, nuts, and any required spectacle blind or isolation arrangement. Internal references for pipe flange dimensions, flange bolt patterns, gasket terminology, and piping CAD blocks can help extend the design check without treating this page as a substitute for the governing project documents.
Using the CAD Drawing
The downloadable DWG is intended to support drafting, detailing, and piping layout coordination. Confirm drawing units, insertion scale, revision status, flange facing details, and project drafting conventions before incorporating the file into a production drawing. The CAD geometry should be checked against the published reference values and the applicable project requirements.
Frequently Asked Questions
What is an 8 Inch Class 2500 blind flange?
It is a solid flange used to close a pipe end, vessel nozzle, equipment connection, or other flanged connection identified as 8 inch Class 2500 in this reference.
Does this blind flange have a center bore?
No. A blind flange is a blank flange without a center bore, allowing it to close the connected piping or equipment opening.
What bolt information is listed for this flange?
The reference lists the stud bolt size as 2" UNC (or M52) x 380 Long, together with 12 bolts and a hole diameter of 2 1/8" (53.975mm). Confirm the complete bolting specification with the project requirements before installation.
What are the listed dimensions and weight?
The published data lists a flange thickness of 127mm and a weight of 241kg. These values should be coordinated with handling, support, and installation planning.
Can the DWG file be used directly for fabrication?
The DWG is provided for drafting, detailing, and piping layout coordination. Before fabrication, verify the drawing against the applicable standard, project specification, flange material, gasket, bolting, and pressure-temperature requirements.
Which standard is referenced for the dimension data?
The page identifies ANSI / ASME B16.5 as the reference standard and states that the dimension data is based on ANSI / ASME B16.5-2020. Confirm the required edition and project criteria before use.