This reference page provides dimension and procurement information for a Blind Flange 10 Inch Class 1500, including the listed flange thickness, weight, stud bolt details, bolt quantity, and hole diameter. The page also includes a CAD drawing resource for drafting and piping layout work.
Use the dimensional values below when coordinating flange details with piping, equipment nozzles, valves, gaskets, and bolting. For fabrication or installation, compare the listed information with the approved project specification and the applicable flange, material, gasket, and pressure-temperature requirements.
Blind Flange 10″ Class 1500
Blind Flange 10″ Class 1500 is used to seal the end of a piping system or close off a flange connection in Class 1500 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 very high pressure rating is required.
This dimension data is based on ANSI / ASME B16.5-2020.
Blind Flange 10″ Class 1500 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 10″
- DN Size: DN250
- Flange Thickness: 108mm
- Weight: 232kg
- Stud Bolt Size: 1 7/8″ UNC (or M48) x 335 Long
- Number of Bolts: 12
- Hole Diameter: 2″ (50.8mm)
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 1500 is commonly used for:
- Pipe end closure
- Equipment isolation
- Valve and nozzle blanking
- Maintenance shutdown work
- Process and utility piping systems
- Very high pressure piping applications
CAD Drawing Download
This page includes the CAD drawing file for Blind Flange 10″ Class 1500, which can be used for drafting, detailing, and piping layout coordination.
Available Blind Flange Class 1500 Sizes
This size is part of the Blind Flange Class 1500 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
A blind flange has no central pipe opening. Unlike a weld neck or slip-on flange, it functions as a removable closure at a flanged connection. Removing the flange can provide access for maintenance, inspection, line isolation, or a future connection, subject to the system’s isolation and safety procedures.
The Class 1500 designation identifies the flange pressure class system used for selection and compatibility. It should not be treated as a standalone allowable pressure. The applicable pressure-temperature rating depends on factors such as flange material, temperature, gasket arrangement, bolting, joint condition, and the governing project requirements.
Key Coordination Checks
- Confirm that the nominal pipe size and DN designation match the connected piping and equipment nozzle.
- Check the flange facing and gasket arrangement against the mating flange and the piping specification.
- Verify stud material, thread form, length, tightening procedure, and projection requirements before ordering or installation.
- Use the listed bolt quantity and hole information when checking drilling, assembly access, and flange alignment.
- Review the flange weight when planning handling, temporary support, and installation activities.
- Confirm that the CAD drawing is used as a drafting reference and is checked against the approved dimensional data before fabrication.
Blind Flange Versus Other Flange Types
A blind flange is selected when the connection must be closed rather than connected to a pipe bore. A weld neck flange, slip-on flange, threaded flange, or socket weld flange serves a different connection purpose. Matching the flange type to the piping design helps prevent errors in nozzle detailing, gasket selection, bolt-up, and future maintenance planning.
For related design work, pair this reference with the site’s resources on flange dimensions, pipe schedules, gasket selection, stud bolt terminology, and piping isometric drawings.
Blind Flange 10 Inch Class 1500 FAQ
What is the primary purpose of this blind flange?
It closes a flanged piping, equipment, valve, or nozzle connection while retaining a removable bolted joint for isolation, maintenance, inspection, or a future connection.
Does a blind flange have a center bore?
No. A blind flange is a solid flange without a pipe-through opening. Its face and bolt arrangement are used to seal the mating connection with the specified gasket and bolting.
What information is provided for this flange?
The source data lists the nominal pipe size, DN designation, flange thickness, weight, stud bolt size and length, number of bolts, and hole diameter. It also identifies the referenced flange standard and provides a CAD download.
Can the listed stud bolt details be used without checking the project specification?
No. Confirm the bolting material, thread requirements, length, tightening method, gasket arrangement, and mating flange details before procurement or installation.
Is the Class 1500 designation the same as a universal pressure limit?
No. The applicable pressure-temperature rating must be verified for the selected material and service conditions. Project specifications and the governing standard should control the final selection.
Can the DWG file be used directly for fabrication?
Use the DWG as a drafting and coordination reference. Before fabrication, check it against the listed dimensional data, approved drawings, material requirements, gasket details, and the latest project revisions.