This reference provides the listed dimensions, weight, bolting information, and CAD resource for a Weld Neck Flange 14 Inch Class 1500. Use the dimensional data for piping layout, drafting, coordination, and preliminary fabrication reference.
Because weld neck flanges connect directly to pipe by welding, correct identification of the pipe schedule, bore, flange facing, material, gasket, and bolting is essential before the connection is detailed or fabricated.
Weld Neck Flange 14″ Class 1500
Weld Neck Flange 14″ Class 1500 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 14″ Class 1500 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS):14″
- DN Size: DN350
- Outside Diameter:749mm
- Flange Thickness:133.4mm
- Hub Diameter:495mm
- Bore Diameter: varies depending on pipe schedule and pipe wall thickness
- Raised Face Diameter:412.8mm
- Weight: 443kg
- Number of Bolts:16
- Stud Bolt Size: 2 1/4″ UNC (or M56) x 405 Long
- Hole Diameter: 2 3/8″ (60.325mm)
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 14″ Class 1500 is commonly used for:
- Process piping systems
- Oil and gas lines
- Refinery and petrochemical piping
- Extremely 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 14″ Class 1500, which can be used for drafting, detailing, piping layout coordination, and fabrication reference.
Available Weld Neck Flange Class 1500 Sizes
This size is part of the Weld Neck 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, pipe schedule, bore size, gasket type, bolt length, and applicable pressure-temperature rating.
How to Use This Weld Neck Flange Reference
The source data identifies the flange by nominal pipe size, DN designation, and pressure class. The outside diameter, thickness, hub diameter, raised face diameter, bolt-hole information, and listed weight describe the flange geometry and assembly requirements. These values should be read together rather than used as isolated dimensions.
Bore and Pipe Schedule Coordination
The bore is not treated as a single universal value in the reference because it varies with the pipe schedule and wall thickness. Confirm the mating pipe specification before preparing a fabrication drawing, checking alignment, or selecting a weld detail. Related pipe dimension and schedule references can help establish the required pipe outside diameter and wall condition.
Bolting and Facing Checks
Use the listed bolt count, stud bolt size, bolt length, and hole diameter when developing a flange assembly or checking a piping model. These details should be coordinated with the companion flange, gasket, nuts, washers, and available installation clearance. The raised face dimension should also be checked against the selected gasket and facing arrangement.
Weld Neck Geometry in Design Work
The tapered hub provides a gradual transition between the flange and pipe. This geometry is one reason weld neck flanges are selected for demanding piping connections, but the final choice still depends on the complete design basis, material specification, pressure-temperature requirements, welding procedure, and applicable project rules.
CAD and Related References
The downloadable DWG file can support drafting, layout coordination, equipment-interface review, and fabrication reference. Check the drawing against the dimensional list before using it as a controlled project deliverable. Useful companion references include pipe schedules, flange facing terminology, gasket selection guidance, stud bolt references, and other Class 1500 flange sizes.
Frequently Asked Questions
What is a weld neck flange?
A weld neck flange has a long tapered hub and is welded directly to the pipe. The hub provides a gradual transition that can help manage stress at the flange-to-pipe connection.
Why does the bore depend on the pipe schedule?
Pipe schedules correspond to different wall thicknesses. Since the flange bore must coordinate with the pipe inside diameter and weld preparation, the correct bore should be confirmed from the pipe specification rather than assumed from nominal size alone.
What bolting information is provided?
The reference lists the number of bolts, stud bolt size, bolt length, and hole diameter. Confirm these details with the mating flange, gasket arrangement, material requirements, and project bolting specification before installation.
Can the listed weight be used for lifting planning?
The listed weight is useful for reference and preliminary handling review. Final lifting, storage, and installation planning should account for the actual supplied component, coatings, accessories, lifting method, and site requirements.
What should be checked before fabrication?
Confirm the latest project requirements, flange material, pipe schedule, bore, gasket type, bolt length, and applicable pressure-temperature rating. Also verify the companion flange and the CAD drawing against the controlled project documents.