This reference page summarizes the listed dimensions and connection details for a Blind Flange 2 Inch Class 150. Use the source data when checking a piping layout, reviewing a flange connection, or coordinating the associated CAD drawing.
For broader project research, compare this entry with related flange dimensions, pipe schedules, gasket selection, and piping terminology references. Those resources help connect the flange data to the surrounding piping design without treating a nominal size as a substitute for project verification.
Blind Flange 2″ Class 150
Blind Flange 2″ Class 150 is used to seal the end of a piping system or close off a flange connection in Class 150 service. It is a solid flange without a center bore and is commonly applied in industrial piping, maintenance isolation points, and future line expansion connections.
This dimension data is based on ANSI / ASME B16.5.
Blind Flange 2″ Class 150 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 2″
- DN Size: DN50
- Flange Thickness: 17.5mm
- Weight: 2.3kg
- Stud Bolt Size: 5/8″ UNC (or M16) x 85 Long
- Number of Bolts: 4
- Hole Diameter: 3/4″ (19.05mm)
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 2″ Class 150 is commonly used for:
- Pipe end closure
- Equipment isolation
- Valve and nozzle blanking
- Maintenance shutdown work
- Process and utility piping systems
CAD Drawing Download
This page includes the CAD drawing file for Blind Flange 2″ Class 150, which can be used for drafting, detailing, and piping layout coordination.
Available Blind Flange Class 150 Sizes
This size is part of the Blind Flange Class 150 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 because it has no center bore. In practice, the listed nominal pipe size identifies the connection category, while the flange thickness, bolt arrangement, hole diameter, and stud bolt specification support drafting and component matching.
Pay particular attention to the distinction between the stud bolt size and the hole diameter. The bolt specification identifies the fastener arrangement listed for this flange, while the hole diameter describes the clearance opening through the flange. These details should be checked together with the mating flange, gasket, washers, and installation requirements.
Design and Drafting Checks
- Confirm that the mating flange uses the same nominal size and Class 150 connection designation.
- Check the bolt count, bolt specification, and hole diameter against the mating component and project requirements.
- Coordinate the flange thickness and listed weight with the assembly model, support details, and handling plan where applicable.
- Use the available DWG file for layout and detailing, then verify dimensions against the approved project documentation before fabrication.
- Confirm material, gasket type, bolt length, and pressure-temperature requirements before installation or procurement.
Why the Class 150 Label Requires Verification
The Class 150 designation identifies the flange class used by the referenced dimensional standard, but it should not be treated as a complete design approval by itself. Material, temperature, gasket, bolting, service conditions, and the applicable project specification can affect the final connection assessment.
When comparing this item with other entries in the Blind Flange Class 150 series, use the individual size page and its associated CAD resource rather than assuming that dimensions or bolting details are interchangeable between sizes.
Frequently Asked Questions
What is a blind flange used for?
A blind flange is used to close the end of a pipe, vessel nozzle, valve connection, or other flanged opening. It can provide a closure point for isolation, maintenance, inspection, or a planned future connection.
What standard is referenced for this flange?
The source data identifies ANSI / ASME B16.5 as the reference standard. Project specifications should still be checked for material, facing, gasket, bolting, and service requirements.
What does NPS 2 correspond to in the source data?
The source lists the nominal pipe size as NPS 2 and the corresponding DN size as DN50. These are nominal identifiers, not a substitute for checking the complete flange and piping dimensions.
How many bolts are listed for this blind flange?
The source lists 4 bolts and identifies the stud bolt size as 5/8" UNC (or M16) x 85 Long. Confirm the required bolting arrangement with the mating flange and project requirements.
Is a blind flange suitable for every Class 150 application?
Not automatically. Confirm the flange material, pressure-temperature requirements, gasket, bolting, service conditions, and applicable project specification before selecting or installing the component.
Is a CAD drawing available?
Yes. The page includes a DWG download for the Blind Flange 2 Inch Class 150. Use it for drafting and coordination, then verify the drawing against the approved source data before fabrication.