This reference page provides the listed dimensions, weight, stud bolt information, and CAD resource for a Blind Flange 10 Inch Class 900. Use the technical values below as the local reference data for drafting, procurement review, and piping coordination.
A blind flange has no center bore, so its primary function is to close a flanged connection. The surrounding piping arrangement, gasket selection, bolt assembly, material specification, and pressure-temperature requirements must still be checked against the project documentation before fabrication or installation.
Blind Flange 10″ Class 900
Blind Flange 10″ Class 900 is used to seal the end of a piping system or close off a flange connection in Class 900 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 10″ Class 900 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 10″
- DN Size: DN250
- Flange Thickness: 69.8mm
- Weight: 132kg
- Stud Bolt Size: 1 3/8″ UNC (or M36) x 235 Long
- Number of Bolts: 16
- Hole Diameter: 1 1/2″ (38.1mm)
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 10″ Class 900 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 10″ Class 900, which can be used for drafting, detailing, and piping layout coordination.
Available Blind Flange Class 900 Sizes
This size is part of the Blind Flange Class 900 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 identifies the nominal pipe size, DN designation, flange thickness, weight, stud bolt specification, bolt quantity, and hole diameter. These details support early layout work and help engineers, drafters, and procurement teams compare the flange with adjoining components.
NPS and DN Identification
NPS and DN are nominal size designations rather than a direct statement of the flange’s measured outside dimensions. Use the listed designations to match this flange with the correct piping class, gasket, fittings, valves, and mating flange information.
Understanding the Bolt Information
The listed stud bolt size includes an inch-based UNC designation and a metric designation, together with the specified length. Do not treat the bolt length as interchangeable with every gasket, flange facing, washer, or nut arrangement. Confirm the complete bolting assembly and tightening requirements in the project specification.
CAD and Drafting Workflow
The downloadable DWG file can support piping layouts, equipment connection details, and coordination drawings. Before issuing a drawing for fabrication, verify the flange facing, mating connection, gasket envelope, bolt access, orientation, and any clearance requirements against the approved project data.
Related Reference Topics
- Blind flange dimensions: compare other nominal sizes within the same flange class.
- ASME B16.5 flange references: review the applicable terminology and dimensional scope.
- Flange bolting and gasket selection: connect the flange dimensions with installation details.
- Pipe fittings and flange CAD files: coordinate adjoining components in drafting workflows.
- Pressure-temperature ratings: verify service conditions rather than relying on the class designation alone.
Frequently Asked Questions
What is a Blind Flange 10 Inch Class 900 used for?
It is used to close a pipe end, equipment nozzle, valve connection, or other flanged opening where a solid closure is required. The application still requires confirmation of the project service conditions and connection details.
Does a blind flange have a center bore?
No. A blind flange is a solid flange without a center bore, allowing it to blank off a flanged connection.
What standard is identified for the listed dimensions?
The source data identifies ANSI / ASME B16.5 as the reference standard. Confirm the applicable project edition, material requirements, facing details, and purchasing specification before use.
Can the listed stud bolt information be used without further checking?
No. Confirm the bolt material, nuts, washers where required, gasket thickness, flange arrangement, and required tightening procedure before installation.
Is the CAD file ready for fabrication without review?
No. The DWG is a drafting resource. Review it against the approved dimension data, mating components, flange facing, clearances, and project requirements before releasing fabrication drawings.