This reference page brings together the dimensional data, connection details, and drafting resource for a Weld Neck Flange 14 Inch Class 150. Use the source values for layout checks, flange selection, and coordination with the mating pipe, gasket, and bolting.
For accurate piping work, distinguish the nominal pipe size from the flange’s measured features. The listed outside diameter, thickness, hub dimensions, raised face, bolt-hole information, and weight describe the flange reference, while the bore must be coordinated with the selected pipe schedule.
Weld Neck Flange 14″ Class 150
Weld Neck Flange 14″ Class 150 is widely used in piping systems that require strong, leak-resistant flange connections. It features a long tapered hub that provides excellent stress distribution and is commonly applied in process piping, utility lines, and industrial systems where welding strength and reliability are important.
This dimension data is based on ANSI / ASME B16.5-2020.
Weld Neck Flange 14″ Class 150 Dimensions
- Reference Standard: ANSI / ASME B16.5
- Nominal Pipe Size (NPS):14″
- DN Size: DN350
- Outside Diameter:533mm
- Flange Thickness:33.3mm
- Hub Diameter:400mm
- Bore Diameter: varies depending on pipe schedule and pipe wall thickness
- Raised Face Diameter:412.8mm
- Weight: 64kg
- Number of Bolts:12
- Stud Bolt Size: 1″ UNC (or M27) x 135 Long
- Hole Diameter: 1 1/8″ (28.575mm)
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 150 is commonly used for:
- Process piping systems
- Oil and gas lines
- Water and utility piping
- High-temperature 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 150, which can be used for drafting, detailing, piping layout coordination, and fabrication reference.
Available Weld Neck Flange Class 150 Sizes
This size is part of the Weld Neck Flange Class 150 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 Flange Reference
A weld neck flange is attached by welding the pipe to its tapered hub. The hub provides a gradual transition from the pipe into the flange, which is why this flange type is often selected when connection integrity, alignment, and resistance to service-related loading are important considerations.
Check the Bore Against the Pipe
The bore is not treated as one universal dimension in the source data. It varies with pipe schedule and wall thickness, so the flange bore should be checked against the actual pipe specification before fabrication or installation. This is an important coordination step alongside reviewing pipe dimensions and schedules.
Review Bolting and Mating Components
The source lists the bolt count, stud-bolt designation, bolt length, and hole diameter for this flange reference. Confirm that the selected studs, nuts, gasket, mating flange, and facing arrangement are compatible with the project requirements. A bolt designation shown in an inch-based or metric form should not be substituted without checking the applicable procurement and assembly requirements.
Use the CAD File Carefully
The downloadable DWG can support drafting, piping layout coordination, and fabrication reference. Treat the drawing as a dimensional aid rather than a replacement for the project specification, approved fabrication information, or an engineering review. Verify the bore and any connection details that depend on the selected pipe and mating components.
Related Reference Topics
- Pipe dimensions and schedules for checking the flange bore
- Flange dimensions and facing terminology for mating-component review
- Pipe fittings and piping terminology for layout and specification work
- CAD and DWG reference resources for drafting coordination
Frequently Asked Questions
What does NPS mean on this flange reference?
NPS identifies the nominal pipe size associated with the flange. It is a nominal designation, so it should be reviewed together with the stated DN designation and the actual pipe dimensions used on the project.
Is the bore fixed for every Weld Neck Flange 14 Inch Class 150?
No. The source data states that the bore varies with pipe schedule and pipe wall thickness. Confirm the required bore against the selected pipe before ordering or welding.
What should be checked before using the listed bolt size?
Check the mating flange, hole diameter, stud length, nut arrangement, gasket, materials, and project requirements. The listed stud-bolt designation is a reference for this flange data and should be confirmed before procurement.
Can the DWG file be used for fabrication?
The DWG is provided as a drafting, layout, coordination, and fabrication reference. Before fabrication, verify the drawing against the authoritative dimensional data, pipe schedule, project specification, and approved engineering documentation.
Where can I find related flange and pipe information?
Use the site’s related references for pipe dimensions and schedules, flange dimensions, fittings, piping terminology, and CAD/DWG resources to coordinate the complete connection.