This reference page provides the source dimensions and identification details for a Blind Flange 16 Inch Class 900. Use the information below when checking a piping layout, preparing fabrication or drafting documents, or locating the associated CAD file.
Because a blind flange closes a connection rather than passing pipe through its center, accurate flange, gasket, and bolting coordination is important during design review and installation planning.
Blind Flange 16″ Class 900
Blind Flange 16″ 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 16″ Class 900 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS): 16″
- DN Size: DN400
- Flange Thickness: 88.9mm
- Weight: 273kg
- Stud Bolt Size: 1 5/8″ UNC (or M42) x 285 Long
- Number of Bolts: 20
- Hole Diameter: 1 3/4″ (44.45mm)
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 16″ 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 16″ 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 technical section identifies the nominal pipe size, DN designation, flange thickness, listed weight, stud bolt specification, bolt quantity, and hole diameter. These values should be read together when coordinating the flange with mating equipment, a valve, a pipe spool, or another flanged component.
The Class 900 designation identifies the flange pressure class used for reference and selection. It should not be treated as a standalone allowable pressure for every service condition. Final selection requires confirmation of the material specification, temperature and pressure requirements, gasket arrangement, bolting details, facing compatibility, and the governing project requirements.
Drafting and CAD Coordination
The downloadable DWG can support general arrangement drawings, piping layout work, equipment connection coordination, and detail development. Before using the drawing for fabrication, confirm that the project revision, flange facing, gasket arrangement, bolt orientation, and mating-component information agree with the approved design.
Related Reference Topics
Readers comparing this component may also need the related flange dimensions, pipe schedules, flange bolt sizing, gasket selection, and CAD/DWG piping references sections. Cross-linking those topics helps users move from a flange lookup to complete connection coordination without treating this page as a substitute for engineering verification.
Frequently Asked Questions
What is a Blind Flange 16 Inch Class 900 used for?
It is used to close the end of a piping system or blank a flanged connection, including locations requiring isolation, maintenance access, equipment blanking, or a future connection.
Does a blind flange have a center bore?
No. A blind flange is a solid flange without a center bore, so it closes the connected opening instead of allowing the pipe passage to continue through the flange.
What information is provided on this page?
The reference includes the nominal pipe size, DN designation, flange thickness, listed weight, stud bolt size and length, number of bolts, hole diameter, reference standard, and an associated CAD download.
Can the listed bolt details be used without checking the mating flange?
No. Confirm the mating flange, gasket, bolt material and condition, required tightening method, clearances, and project specifications before ordering or installation.
Is the Class 900 designation sufficient for pressure selection?
No. Pressure-temperature capability and suitability depend on the applicable material, service conditions, flange configuration, and project requirements. Verify the complete design basis before selection.