This reference provides the listed dimensions, weight, stud-bolt information, and CAD resource for a Blind Flange 5 Inch Class 600. Use it when checking a piping layout, preparing fabrication notes, or coordinating a flange connection with related equipment.
The original data identifies the nominal pipe size, DN designation, flange thickness, bolt arrangement, hole diameter, and reference standard. Treat these values as a dimensional reference and confirm the project specification, material, gasket arrangement, and pressure-temperature requirements before fabrication or installation.
Blind Flange 5″ Class 600
Blind Flange 5″ 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 5″ Class 600 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 5″
- DN Size: DN125
- Flange Thickness: 44.4mm
- Weight: 31kg
- Stud Bolt Size: 1″ UNC (or M27) x 165 Long
- Number of Bolts: 8
- Hole Diameter: 1 1/8″ (28.575mm)
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 5″ 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 5″ 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 the Blind Flange Reference
A blind flange has no center bore, so it closes a flanged connection rather than allowing pipe flow through the flange. This makes it useful for pipe-end closure, equipment isolation, maintenance access, and connections that may be opened or extended later.
Understanding the Listed Dimensions
NPS and DN: The NPS entry identifies the nominal pipe size in the inch-based system, while the DN entry provides the corresponding metric designation. These are nominal designations, not a direct statement of the flange’s measured outside diameter or bore.
Thickness and weight: The listed flange thickness supports dimensional checking and drawing review. The stated weight is useful for handling, shipping, and preliminary support coordination, but lifting and installation planning should account for the complete assembly and site conditions.
Bolting: The reference lists the stud-bolt designation, length, and number of bolts, along with the hole diameter. Confirm bolt material, thread details, tightening requirements, gasket selection, and the mating flange configuration against the governing project documents.
CAD and Drafting Use
The downloadable DWG can support piping layouts, equipment coordination, and detail drafting. Before issuing a drawing for fabrication, compare the CAD geometry with the listed reference data and verify the required flange facing, material specification, tolerances, and project standards.
Related Reference Topics
This page can be used alongside references for flange dimensions, pipe schedules, NPS and DN terminology, gasket selection, bolted-joint practices, and piping CAD blocks. Linking these topics helps readers move from a dimensional lookup to a complete connection review without treating a single flange entry as a full design approval.
Frequently Asked Questions
What is a blind flange used for?
A blind flange closes the end of a pipeline, vessel nozzle, valve connection, or other flanged opening. It can provide an isolation point and allow access for future maintenance or line extension.
Does this blind flange have a center bore?
No. A blind flange is a solid flange without a center bore, which distinguishes it from flanges intended to pass fluid through the connection.
What bolting information is provided?
The reference lists the stud-bolt size in inch UNC and metric notation, the specified bolt length, the number of bolts, and the hole diameter. Confirm the complete bolting and tightening requirements before installation.
Can the DWG file be used for fabrication?
The DWG is provided for drafting, detailing, and piping-layout coordination. It should be checked against the listed dimensions and the project’s material, gasket, facing, tolerance, and pressure-temperature requirements before fabrication.
Is Class 600 alone enough to select the flange?
No. Flange selection also requires confirmation of the applicable material specification, temperature and pressure conditions, gasket arrangement, mating components, and project requirements.