Blind Flange 6 Inch Class 150 reference data is useful when a piping connection must be closed without providing a flow passage. This page brings together the listed flange thickness, weight, bolt arrangement, hole diameter, and CAD drawing information for drafting and coordination.
Use the dimensional list below as the local reference for this flange size. For purchasing, fabrication, or installation, compare the listed details with the project flange specification, gasket requirements, bolting requirements, and applicable design conditions.
Blind Flange 6″ Class 150
Blind Flange 6″ 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 6″ Class 150 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 6″
- DN Size: DN150
- Flange Thickness: 23.9mm
- Weight: 11.8kg
- Stud Bolt Size: 3/4″ UNC (or M20) x 100 Long
- Number of Bolts: 8
- 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 6″ 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 6″ 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 Read This Blind Flange Reference
A blind flange has no center bore, so it closes a flanged connection rather than joining two open pipe ends. It may be installed at a pipe termination, equipment nozzle, valve connection, or planned future branch. Because the flange can be removed, it also provides a practical access point for isolation, inspection, maintenance, or later line extension.
Dimensions, Bolting, and Drafting Coordination
The source data identifies the nominal pipe size as NPS 6 and the corresponding DN designation as DN150. It also lists the flange thickness, component weight, stud bolt specification, bolt quantity, and hole diameter. These values should be coordinated with the mating flange, gasket seating arrangement, available bolt access, and the piping layout.
The listed hole diameter is the clearance opening in the flange. It should not be treated as the bolt diameter. Likewise, the stated stud bolt detail should be checked against the project bolting specification, thread convention, required engagement, washers, gasket thickness, and joint assembly procedure before procurement.
Class 150 Selection Checks
Class designation alone does not replace a complete pressure-temperature and materials review. Confirm the flange material, facing and gasket compatibility, service conditions, corrosion requirements, and the applicable project or fabrication specification. The mating flange must have compatible drilling and facing details so that the connection can be assembled correctly.
Related Reference Topics
For broader piping research, connect this page with the site references for flange dimensions, pipe schedules, flange facing types, stud bolt dimensions, gasket selection, and piping CAD or DWG details. Related blind flange sizes in the same class can help with comparison, but each size should be checked against its own local dimension data.
Frequently Asked Questions
What is a blind flange used for?
A blind flange closes the end of a pipeline or a flanged equipment connection. It is commonly used for isolation, maintenance access, valve or nozzle blanking, and future piping extensions.
Does a blind flange have a center bore?
No. A blind flange is a solid flange without a center bore. Its purpose is to block the connection rather than provide a passage for fluid.
What should be checked before ordering this flange?
Confirm the flange standard, material, facing, gasket type, bolt and thread requirements, mating flange details, and applicable pressure-temperature rating. Also verify that the CAD drawing and listed dimensions match the project specification.
Is the listed hole diameter the same as the bolt size?
No. The hole diameter describes the opening through the flange for the bolting assembly, while the bolt or stud size describes the fastener. Check both against the project bolting specification.