This reference covers the dimensions, weight, bolt information, and drafting considerations for a Weld Neck Flange 2 Inch Class 600. Use the dimensional list below as the local reference data for checking flange layouts, fabrication drawings, and piping details.
The page is also useful when comparing related flange dimensions, pipe schedules, fittings, and CAD/DWG reference resources. Because the bore depends on the connected pipe wall thickness, dimensional review should include the selected pipe schedule rather than relying on nominal size alone.
Weld Neck Flange 2″ Class 600
Weld Neck Flange 2″ Class 600 is widely used in piping systems that require strong, leak-resistant flange connections under high-pressure service. It features a long tapered hub that provides excellent stress distribution and is commonly applied in process piping, utility lines, refineries, power plants, and industrial systems where welding strength and reliability are essential.
This dimension data is based on ANSI / ASME B16.5-2020.
Weld Neck Flange 2″ Class 600 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS):2″
- DN Size: DN50
- Outside Diameter:165mm
- Flange Thickness:25.4mm
- Hub Diameter:84mm
- Bore Diameter: varies depending on pipe schedule and pipe wall thickness
- Raised Face Diameter:92.1mm
- Weight: 4.6kg
- Number of Bolts:8
- Stud Bolt Size: 5/8″ UNC (or M16) x 110 Long
- Hole Diameter: 3/4″ (19.05mm)
What Is a Weld Neck Flange?
A weld neck flange is a type of pipe flange designed with a long tapered hub that is welded directly to the pipe. This design helps reduce stress concentration at the flange base and provides better strength under pressure, temperature fluctuation, and cyclic loading.
Common Applications
Weld Neck Flange 2″ Class 600 is commonly used for:
- Process piping systems
- Oil and gas lines
- Water and utility piping
- High-pressure service
- Pressure piping connections
- Industrial fabrication and maintenance work
CAD Drawing Download
This page includes the CAD drawing file for Weld Neck Flange 2″ Class 600, which can be used for drafting, detailing, piping layout coordination, and fabrication reference.
Available Weld Neck Flange Class 600 Sizes
This size is part of the Weld Neck 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, pipe schedule, bore size, gasket type, bolt length, and applicable pressure-temperature rating.
How to Read This Weld Neck Flange Reference
A weld neck flange is attached to the pipe through its tapered hub. When reviewing the dimensions, distinguish between the flange outside diameter, flange thickness, hub diameter, raised face diameter, and bore. These features serve different drafting and fabrication purposes and should not be treated as interchangeable dimensions.
Key Checks for Drawings and Fabrication
- Confirm the nominal pipe size and DN designation match the piping line or equipment connection.
- Check the flange face and bolt-hole information when coordinating mating flanges, gaskets, and bolting.
- Use the pipe schedule and wall thickness to determine the appropriate bore for the weld neck flange.
- Review the listed stud bolt size, bolt-hole diameter, and bolt count together when preparing a connection detail.
- Use the downloadable DWG as a drafting and coordination reference, then verify project-specific requirements before fabrication.
Related Reference Topics
For broader piping work, this page can be reviewed alongside references for pipe dimensions and schedules, flange types, pressure classes, gasket selection, stud bolts, and piping terminology. The available Class 600 size references can also help with comparison work when the same flange series is used elsewhere in a layout.
Why the Bore Requires Separate Review
The flange’s nominal size identifies the intended pipe connection, but the bore is affected by the pipe’s wall thickness. This is why the source data states that bore diameter varies with pipe schedule. Confirm the pipe specification before releasing a fabrication drawing or ordering the flange.
Frequently Asked Questions
What does a weld neck flange do?
A weld neck flange connects to the pipe through a long tapered hub. Its geometry is intended to support stress distribution at the flange-to-pipe connection and is used where a welded, pressure-resistant connection is required.
Why is the bore not listed as one fixed dimension?
The bore varies with the connected pipe schedule and wall thickness. Select or verify the bore using the actual pipe specification for the project.
What bolt information is provided for this flange?
The reference lists the number of bolts, stud bolt size, and hole diameter. These details should be checked together with the mating flange, gasket arrangement, and project bolting requirements.
Can the DWG file be used for fabrication?
The DWG is provided for drafting, detailing, piping layout coordination, and fabrication reference. Before fabrication, verify the drawing against the project specification, pipe schedule, material requirements, gasket details, and applicable pressure-temperature requirements.
Should the listed weight be used for lifting or structural design?
The listed weight is a reference value for this flange entry. Any lifting, support, handling, or structural design decision should be based on verified project data and engineering review.