A Blind Flange 6 Inch Class 600 is a solid end-closure component used where a flanged piping connection must be sealed without allowing flow through the flange. This reference brings together the published dimensions, bolt information, weight, and CAD resource for drafting and piping coordination.
Use the dimensional data below as the local reference for this page. For procurement, fabrication, or installation, compare the flange details with the mating flange, gasket, bolting specification, material requirements, and project design conditions.
Blind Flange 6″ Class 600
Blind Flange 6″ 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 6″ Class 600 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 6″
- DN Size: DN150
- Flange Thickness: 47.8mm
- Weight: 39kg
- Stud Bolt Size: 1″ UNC (or M27) x 170 Long
- Number of Bolts: 12
- 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 6″ 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 6″ 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 listed nominal size identifies the piping connection category, while the DN designation provides the corresponding metric size reference. The flange thickness and weight are useful for layout review, material planning, handling, and model coordination, but they should not be used as substitutes for a project-approved material or fabrication specification.
The bolt information identifies the specified stud bolt arrangement, bolt count, and clearance-hole diameter for this flange entry. Successful installation also depends on matching the mating flange, gasket, washers where required, thread condition, tightening procedure, and applicable project requirements. Bolt length should be checked against the complete assembled joint rather than selected from the flange entry alone.
Blind Flange Use in Piping Systems
Because a blind flange has no center bore, it closes the flow path at a pipe end, nozzle, valve connection, or other flanged joint. It can support planned isolation, maintenance access, equipment blanking, or a future connection point. Before removing or loosening a blind flange, the line should be isolated, depressurized, drained, and verified safe under the applicable site procedure.
CAD and Related Reference Work
The downloadable DWG can help with drafting, piping layout coordination, equipment-nozzle studies, and clearance checks. CAD geometry should still be reviewed against the dimensional list and the project’s approved flange, gasket, and bolting details before it is released for fabrication.
For related research, link this page to the site’s flange dimensions reference, Class 600 flange series, pipe schedules, gasket selection guidance, and piping terminology resources. These connections help readers move from a component dimension check to a complete flanged-joint review.
Frequently Asked Questions
What is a Blind Flange 6 Inch Class 600 used for?
It is used to close a flanged piping connection, pipe end, equipment nozzle, or valve connection where a solid closure is required. Typical uses include isolation, maintenance work, equipment blanking, and planned future extensions.
Does a blind flange have a center opening?
No. A blind flange is solid across its face and does not provide a flow passage. Its purpose is to block the connected piping path.
Can the listed stud bolts be used for every installation?
Not automatically. The listed bolt information belongs to this flange reference, but the final bolting selection must account for the mating flange, gasket, washers, joint thickness, material specification, tightening method, and project requirements.
Can the DWG be used directly for fabrication?
The DWG is intended to support drafting and coordination. Confirm its geometry against the published dimensional data and the approved project specification before using it for fabrication or construction documentation.
What should be checked before installing this flange?
Confirm the flange standard, material, mating connection, gasket, bolt arrangement, bolt length, pressure-temperature requirements, line condition, and site safety controls. Engineering or responsible piping personnel should approve the final installation details.