This reference page provides the source dimensions and identification details for a Blind Flange 24 Inch Class 900. Use it when checking a piping layout, preparing fabrication drawings, coordinating a flange connection, or locating the associated DWG file.
The existing reference data identifies the nominal size, DN designation, flange thickness, weight, stud bolt information, bolt count, and hole diameter. Treat those listed values as the controlling local reference for this page, then confirm them against the project specification and the applicable flange details before procurement or installation.
Blind Flange 24″ Class 900
Blind Flange 24″ Class 900 is used to seal the end of a piping system or close off a flange connection in Class 900 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 a higher pressure rating is required.
This dimension data is based on ANSI / ASME B16.5-2020.
Blind Flange 24″ Class 900 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 24″
- DN Size: DN600
- Flange Thickness: 139.7mm
- Weight: 875kg
- Stud Bolt Size: 2 1/2″ UNC (or M64) x 440 Long
- Number of Bolts: 20
- Hole Diameter: 2 5/8″ (66.675mm)
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 24″ Class 900 is commonly used for:
- Pipe end closure
- Equipment isolation
- Valve and nozzle blanking
- Maintenance shutdown work
- Process and utility piping systems
- Higher pressure piping applications
CAD Drawing Download
This page includes the CAD drawing file for Blind Flange 24″ Class 900, which can be used for drafting, detailing, and piping layout coordination.
Available Blind Flange Class 900 Sizes
This size is part of the Blind Flange Class 900 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 piping connection with a solid plate rather than providing a passage for fluid. Because the flange has no center bore, it can isolate a line, blank an equipment connection, or reserve a connection for future work. In service, the blind flange works with the gasket and bolting system to form the joint; these components should therefore be checked together rather than selected independently.
Understanding the Listed Dimensions
The page separates the nominal pipe designation from the DN designation so that drawings, specifications, and supplier documents can be cross-checked using either convention. The thickness and weight are useful for detailing, handling, support coordination, and shipping review. The bolt size, bolt quantity, and hole diameter should be checked against the mating flange, gasket arrangement, washer requirements, and the project bolting specification.
A pressure class is a flange-rating designation, not a complete statement of allowable operating pressure for every service. Final suitability depends on material, temperature, gasket selection, joint assembly, corrosion allowance where applicable, and the governing project requirements. Do not use the flange class alone to approve a piping design.
CAD and Drafting Workflow
The downloadable DWG can support preliminary layout, drafting, and coordination. Before issuing a drawing for fabrication, compare the CAD geometry with the dimension list and confirm facing details, bolt-hole orientation, tolerances, and mating-component requirements. The CAD file should be treated as a drafting aid unless the project document-control process identifies it as an approved fabrication source.
For broader design work, link this page with the site’s flange dimensions, pipe schedules, flange facing types, gasket selection, stud bolt references, and piping CAD/DWG resources. These related references help readers move from a component lookup to a complete connection review.
Pre-Fabrication and Installation Checks
- Confirm the mating flange designation and facing arrangement.
- Verify the gasket type and material against the service specification.
- Check stud bolt dimensions, thread requirements, engagement, and assembly procedure.
- Confirm material, marking, inspection, and documentation requirements.
- Review pressure-temperature limitations with the responsible piping or mechanical engineer.
- Make sure the selected blind flange does not conflict with access, drainage, venting, or maintenance requirements.
Frequently Asked Questions
What is a blind flange used for?
A blind flange is used to close a pipe end, equipment nozzle, valve connection, or other flanged opening. It is also useful where future inspection, maintenance, isolation, or line extension is anticipated.
Does a blind flange have a center bore?
No. A blind flange is solid across the opening. Its purpose is to block the connection rather than allow flow through it.
What information is provided for this flange?
This page lists the reference standard, nominal pipe size, DN designation, flange thickness, weight, stud bolt description, number of bolts, and hole diameter for the referenced component.
Can the listed bolt information be used without checking the mating flange?
No. The bolting information should be checked against the mating flange, gasket arrangement, washers, thread requirements, assembly method, and project specification before ordering or installation.
Is the DWG file sufficient for fabrication?
The DWG is intended to assist drafting, detailing, and piping-layout coordination. Confirm its geometry against the page data, approved project drawings, tolerances, facing requirements, and the applicable quality documents before fabrication.
Does Class 900 alone determine allowable operating pressure?
No. Allowable service conditions depend on the complete flange specification, including material, temperature, gasket and bolting selection, and project design requirements. Engineering verification is required.