This reference page brings together the dimensional information, bolting details, weight, and CAD resource for a Blind Flange 1 1/2 Inch Class 600. Use it when checking a piping layout, preparing a fabrication drawing, or comparing this flange with other sizes in the same class.
A blind flange has no pipe-opening bore. Its purpose is to close a flanged connection while retaining the option of future access, inspection, maintenance, or line extension. Dimensional selection should always be coordinated with the mating flange, gasket, bolts, material specification, and project requirements.
Blind Flange 1 1/2″ Class 600
Blind Flange 1 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 1/2″ Class 600 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 1 1/2″
- DN Size: DN40
- Flange Thickness: 22.4mm
- Weight: 3.7kg
- Stud Bolt Size: 3/4″ UNC (or M20) x 110 Long
- Number of Bolts: 4
- Hole Diameter: 7/8″ (22.225mm)
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 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 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 Use This Blind Flange Reference
The dimension list below separates the information typically needed for drafting and procurement: nominal size, metric designation, flange thickness, mass, stud-bolt description, bolt quantity, and hole diameter. Keeping these items together helps reduce errors when a flange is transferred from a reference page into a piping arrangement, equipment layout, or fabrication detail.
Dimension and Bolting Checks
- Confirm that the nominal pipe size and DN designation match the project line list and mating flange.
- Use the flange thickness and hole diameter when checking clearances in a drawing or model.
- Verify the stud-bolt size, thread designation, length, and bolt quantity against the project bolting specification.
- Check gasket selection, facing details, materials, and tightening requirements before assembly.
- Do not treat the class designation alone as a complete allowable-pressure value; pressure-temperature limits depend on the applicable material and project requirements.
Drafting and CAD Coordination
The downloadable DWG can support preliminary drafting, piping layout coordination, and detail development. Before issuing a drawing for fabrication, compare the CAD geometry with the dimensional reference on this page and confirm that the selected facing, gasket, bolts, and mating component are compatible.
Finding Related References
For broader design research, compare this page with the Blind Flange Class 600 size index, related flange dimension references, piping terminology guides, and the site’s CAD and DWG resources. These related references are useful when checking adjacent nominal sizes or assembling a consistent piping component library.
Frequently Asked Questions
What is a Blind Flange 1 1/2 Inch Class 600 used for?
It is used to close the end of a piping system or a flanged connection. Typical uses include equipment isolation, maintenance blanking, valve or nozzle closure, and future piping extensions.
Does a blind flange have a center bore?
No. A blind flange is a solid flange without a center bore. It closes the connection rather than allowing pipe flow through the flange.
What bolt information is provided for this flange?
The reference provides the stud-bolt size, thread designation, length, required bolt quantity, and hole diameter. Confirm these details with the project bolting specification and the mating flange before installation.
Can the CAD file be used directly for fabrication?
The DWG is intended to assist drafting, detailing, and piping layout coordination. It should be checked against the listed dimensions, project specifications, mating components, gasket requirements, and fabrication controls before release.
Does Class 600 identify one universal pressure limit?
No. The applicable pressure-temperature rating must be confirmed using the relevant material, temperature, project specification, and governing requirements. The class designation should not be used by itself to approve a piping design.