This reference page provides the dimensional and bolting information for a Blind Flange 1/2 Inch Class 600, including thickness, weight, bolt arrangement, and hole diameter. The source data is presented for piping design, drafting, procurement review, and field identification.
A blind flange has no center bore. Unlike a weld neck or slip-on flange, it closes an existing flange connection rather than providing a passage for the pipe. This makes it useful where a line, nozzle, valve connection, or equipment opening must be isolated or left ready for future access.
Use the dimension list below together with the downloadable DWG CAD file when preparing layouts or checking flange clearances. For related reference work, compare this page with PipeSTD resources for flange dimensions, pipe schedules, flange terminology, and bolt and gasket selection.
Blind Flange 1/2″ Class 600
Blind Flange 1/2″ Class 600 is used to seal the end of a piping system or close off a flange connection in Class 600 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 1/2″ Class 600 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 1/2″
- DN Size: DN15
- Flange Thickness: 14.2mm
- Weight: 1.4kg
- Stud Bolt Size: 1/2″ UNC (or M14) x 75 Long
- Number of Bolts: 4
- Hole Diameter: 5/8″ (15.875mm)
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 1/2″ Class 600 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 1/2″ Class 600, which can be used for drafting, detailing, and piping layout coordination.
Available Blind Flange Class 600 Sizes
This size is part of the Blind Flange Class 600 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 source data identifies the flange by both nominal pipe size and pressure class. NPS is the customary U.S. designation, while DN provides the corresponding metric nominal designation. These labels identify the connection size; they should not be treated as a direct measurement of every flange feature or of the flange outside diameter.
The listed flange thickness and weight are useful for preliminary arrangement work, material handling, and checking whether a model or drawing uses the intended component. Weight can also matter when reviewing removable blanks, temporary closures, lifting access, and support requirements. Confirm the actual manufactured component against approved drawings and purchasing documents before fabrication.
Bolting and Hole Information
The page lists the stud bolt designation, bolt length, number of bolts, and hole diameter. These details should be reviewed together rather than independently. The bolt pattern must align with the mating flange, while the selected studs, nuts, washers, and tightening procedure must be compatible with the project specification and gasket arrangement.
Do not infer the required tightening torque, gasket dimensions, material grade, or allowable operating conditions from the flange size alone. Those items depend on the complete joint design, materials, temperature, service fluid, and applicable engineering requirements. The stated Class 600 designation is not by itself a substitute for a project pressure-temperature review.
Using the CAD Drawing
The included DWG file can support piping layout, equipment-interface coordination, fabrication detailing, and preliminary clash review. Check the drawing units, insertion scale, layer content, and orientation after download. CAD geometry is a drafting aid; it should be checked against the listed reference data and the approved project specification before it is used for fabrication.
Selection and Installation Checks
- Confirm the nominal size and Class 600 designation match the mating connection.
- Verify the flange material and facing requirements against the piping class or equipment specification.
- Confirm gasket type, bolt materials, bolt length, and tightening requirements before assembly.
- Check access for installation, inspection, removal, and future maintenance.
- Use the applicable project documents and current engineering review for pressure-temperature suitability.
For broader piping work, this page can be used alongside references for flange facing types, pipe identification, ASME flange terminology, and piping isometric drafting.
Frequently Asked Questions
What is a Blind Flange 1/2 Inch Class 600?
It is a solid flange identified for a 1/2-inch nominal pipe connection and Class 600 service designation. Its lack of a center bore allows it to close a flange connection, pipe end, equipment nozzle, or valve connection.
What information is included on this page?
The reference includes the nominal pipe size, DN designation, flange thickness, weight, stud bolt specification, bolt quantity, and hole diameter. It also provides access to a DWG file for drafting and layout coordination.
Can this blind flange be used as a pressure boundary without further review?
The listed dimensions should not be treated as a complete design approval. Confirm material, gasket, bolting, temperature, pressure, service conditions, and project requirements before fabrication or installation. A qualified engineer should review the complete joint and piping system.
Why should the mating flange be checked?
A blind flange must align with the mating flange bolt pattern and connection requirements. Checking both components helps prevent mismatched size, hole arrangement, facing, gasket, or bolting details.
What is the CAD file used for?
The DWG file is intended to support drafting, piping layout, equipment coordination, and detail development. Verify its units and geometry against the authoritative dimension information before using it for manufacturing.
Where can I find related flange information?
See related PipeSTD references for flange dimensions, pipe schedules, flange classes, gasket terminology, bolting, and CAD/DWG piping resources.