This reference provides a practical overview of the Blind Flange 5 Inch Class 2500, including its listed dimensions, weight, bolting information, applications, and CAD drawing access. Use the technical list below as the local reference data for drafting and preliminary piping coordination.
For related work, compare this page with other blind flange dimensions, flange bolt references, pipe size terminology, and piping CAD resources to help coordinate connected components.
Blind Flange 5″ Class 2500
Blind Flange 5″ 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 5″ Class 2500 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 5″
- DN Size: DN125
- Flange Thickness: 91.9mm
- Weight: 102kg
- Stud Bolt Size: 1 3/4″ UNC (or M45) x 300 Long
- Number of Bolts: 8
- Hole Diameter: 1 7/8″ (47.625mm)
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 5″ 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 5″ 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 Read This Blind Flange Reference
The nominal pipe size and DN designation identify the flange size within the piping system. They are nominal designations, so they should be used together with the listed flange dimensions rather than treated as a direct measurement of every physical feature.
Flange thickness and weight are important for layout, handling, support review, and equipment-interface coordination. The bolt information identifies the stud size, length, bolt quantity, and hole diameter listed for this flange. These details should be checked against the mating flange, gasket arrangement, washer requirements, and the project bolting specification before procurement.
Connection and Installation Checks
- Confirm that the mating flange uses the compatible pressure class and facing arrangement.
- Verify the material specification and pressure-temperature requirements for the service.
- Check gasket selection, bolt engagement, tightening procedure, and access for installation.
- Coordinate the flange with connected pipe, valves, equipment nozzles, supports, and maintenance clearances.
- Use the CAD file for drafting reference, then verify fabrication details against the approved project documents.
Why the Class Designation Matters
The Class 2500 designation identifies the flange series, but it should not be treated as a standalone allowable pressure for every material or operating condition. Final selection depends on the applicable standard, material, temperature, gasketed joint, and project requirements. The source notes on this page should therefore be reviewed together with the governing design and procurement documents.
Frequently Asked Questions
What is a blind flange used for?
A blind flange closes a pipe end, vessel nozzle, valve connection, or other flanged opening. It can also provide an access point for future maintenance, inspection, isolation, or line extension.
Does this blind flange have a center bore?
No. A blind flange is a solid flange without a center bore, allowing the connected opening to be closed when the flange is correctly gasketed and bolted.
Where can I find the CAD drawing?
The downloadable DWG file is provided in the CAD Drawing Download section. Use it as a drafting and layout-coordination reference, and confirm final fabrication information with approved project documents.
Should the listed bolt length be used without checking?
No. Confirm bolt length and the complete bolting arrangement against the mating flange, gasket thickness, washers, facing details, and project specification before installation.
What should be verified before ordering?
Verify the nominal size, pressure class, material, facing, gasket type, bolt specification, pressure-temperature requirements, and applicable project or piping standard. The source notes also recommend confirming the latest requirements before fabrication or installation.