This reference page provides the dimensional and installation context for a Blind Flange 6 Inch Class 2500. Use the listed values when checking piping layouts, flange connections, fabrication drawings, and procurement information, while treating the existing dimension list as the controlling local reference.
A blind flange closes a flanged connection without providing a flow passage. In practice, it can support isolation, maintenance access, equipment blanking, or a planned future connection. For related design work, connect this page with internal references covering pipe dimensions and schedules, flange terminology, gasket selection, and CAD/DWG piping resources.
Blind Flange 6″ Class 2500
Blind Flange 6″ 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 6″ Class 2500 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 6″
- DN Size: DN150
- Flange Thickness: 108mm
- Weight: 157kg
- Stud Bolt Size: 2″ UNC (or M52) x 345 Long
- Number of Bolts: 8
- 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 6″ 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 6″ 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 page’s dimension list identifies the nominal pipe size, metric DN designation, flange thickness, listed weight, stud bolt requirement, bolt count, and hole diameter. These values should be read together rather than treated as interchangeable specifications. For example, the stud bolt entry describes the threaded fastener designation and length, while the hole diameter describes the clearance opening through the flange. Both affect connection compatibility, but they are not the same measurement.
NPS and DN Designations
NPS 6 and DN150 are nominal size references used to identify the piping connection. They are not a direct statement of the flange’s measured outside diameter, bore, or bolt-circle geometry. Use the source dimension data and the accompanying CAD file when developing a detailed drawing or checking physical fit.
Weight and Handling
The listed weight is useful for estimating handling requirements, shipping information, and equipment or support coordination. Actual handling procedures should also consider the material, lifting method, packaging, and site requirements. Do not use the page weight alone to approve lifting equipment or installation procedures.
Connection and Installation Checks
Before ordering or installing the flange, compare the mating flange, gasket, fasteners, facing details, material specification, and pressure-temperature requirements. Confirm that the selected stud bolts provide the required engagement and that the hole pattern aligns with the mating component. The applicable project specification and the current governing standard should take precedence where requirements differ.
CAD and Related Reference Opportunities
The downloadable DWG is intended to support drafting, detailing, and piping layout coordination. A useful workflow is to review the dimension list first, open the CAD file for geometric coordination, and then verify the final connection against project documents. Internal links to the site’s blind flange size index, Class 2500 flange references, pipe schedule pages, and flange terminology guide can help readers compare related components without mixing data from different flange sizes or classes.
Blind Flange 6 Inch Class 2500 FAQ
What is a Blind Flange 6 Inch Class 2500?
It is a solid flange identified for a nominal six-inch pipe connection and Class 2500 service. Because it has no center bore, it is used to close a piping or equipment connection.
How many bolts are listed for this blind flange?
The source data lists eight bolts. Confirm the complete bolt arrangement and mating-flange compatibility from the project documents and the applicable flange reference.
What stud bolt size is listed?
The listed stud bolt is 2" UNC (or M52) x 345 Long. Do not substitute between inch and metric fasteners without confirming thread compatibility, material, engagement, and project requirements.
What is the listed flange weight?
The source lists a weight of 157kg. Use it as a reference for handling and logistics, not as the sole basis for lifting or support design.
Is the CAD file suitable for fabrication?
The DWG is provided for drafting, detailing, and layout coordination. Fabrication should proceed only after the drawing, material, gasket, fastener, inspection, and project requirements have been reviewed and approved.
What should be checked before installation?
Confirm the mating flange, gasket type, fastener specification, flange material, hole alignment, pressure-temperature requirements, and the applicable project standard before installation.