This reference page provides the listed dimensions, weight, bolt information, and CAD resource for a Blind Flange 1 Inch Class 2500. Use it when checking a piping layout, preparing a fabrication drawing, or comparing related flange sizes. The existing data is presented as a practical reference; final selection should follow the project specification, material requirements, gasket arrangement, and applicable design checks.
For related research, compare this page with references covering flange dimensions, flange classes, pipe schedules, stud bolt selection, and piping CAD/DWG files.
Blind Flange 1″ Class 2500
Blind Flange 1″ 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 1″ Class 2500 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 1″
- DN Size: DN25
- Flange Thickness: 35.1mm
- Weight: 5kg
- Stud Bolt Size: 7/8″ UNC (or M24) x 140 Long
- Number of Bolts: 4
- Hole Diameter: 1″ (25.4mm)
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 1″ 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 1″ 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 flanged connection without providing a flow passage. In a piping layout, it can mark a permanent closure, an isolation point, an equipment connection, or a location reserved for future work. Because the flange is solid, the connected system and the closure arrangement must be evaluated together before installation.
The dimension list below should be read as a coordinated set rather than as isolated values. The nominal size identifies the associated piping connection, while the listed thickness, bolt pattern information, hole diameter, and weight support drafting, material takeoff, and preliminary component checks. Confirm how the flange is represented in the project’s piping specification and whether the selected gasket and bolting arrangement match the mating flange.
Drafting and CAD Coordination
The downloadable DWG can support layout work, detail development, and coordination with nearby valves, nozzles, and pipe assemblies. Before using the drawing for fabrication, check units, insertion orientation, connection references, and whether the drawing reflects the project’s required facing and material details. Related CAD resources for blind flanges, weld neck flanges, and piping fittings can help maintain consistent blocks and connection geometry across a project.
Selection and Installation Checks
- Match the flange class and nominal pipe size to the piping specification.
- Confirm the mating flange, gasket type, and facing arrangement before ordering.
- Verify material, temperature service, and pressure-temperature requirements with the responsible engineer.
- Check stud engagement, tightening procedure, access, and maintenance clearance during detailing.
- Use the listed weight for reference and confirm handling requirements for the actual supplied component.
Frequently Asked Questions
What is a Blind Flange 1 Inch Class 2500 used for?
It is used to close a flanged piping, equipment, valve, or nozzle connection. Typical purposes include isolation, maintenance shutdown work, pipe-end closure, and provision for future expansion.
Does a blind flange have a center bore?
No. A blind flange is a solid closure flange without a flow-through center bore. Its connection and bolting details must be checked against the mating component.
Where can I find the bolt information?
The source dimension list on this page identifies the stud bolt size, length, and number of bolts for this reference item. Confirm the final bolting arrangement against the project specification and installation procedure.
Can the DWG be used directly for fabrication?
The DWG is intended to assist drafting, detailing, and piping layout coordination. Review its units, project requirements, material specification, gasket details, and applicable engineering checks before releasing fabrication information.
What should be verified before installation?
Verify the flange material, gasket, mating connection, bolting, pressure-temperature requirements, and installation procedure. The responsible engineer or project specification should govern the final selection.