Service Metal
Carbon Steel Weld Stub Ends (ASA Length)
- SKU:
- SSE
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
Carbon Steel Weld Lap Joint Stub Ends
Carbon Steel Weld Lap Joint Stub Ends are designed for use with lap joint flanges, providing a practical flanged connection method while allowing the backing flange to rotate freely for easier bolt-hole alignment during installation.
Manufactured from durable carbon steel, these butt weld stub ends provide a permanent welded connection to the pipe while supporting removable lap joint flange assemblies. Available in Standard and Extra Heavy options, they are well suited for industrial, commercial, mechanical, and process piping systems requiring strength, weldability, alignment flexibility, and serviceability.
Product Highlights
- Carbon steel butt weld lap joint stub end
- Designed for use with compatible lap joint flanges
- Allows backing flange rotation for easier bolt-hole alignment
- Provides a permanent welded connection to the adjoining pipe
- Supports removable and serviceable flanged connections
- Available in Standard and Extra Heavy options
- Seamless butt weld fittings conform to ASTM A/SA234 WPB through 24"
- Weld fitting dimensions conform to ASME/ANSI B16.9, B16.11, and B16.28 through 24"
- Weld fitting dimensions larger than 24" conform to MSS-SP-48
- Carbon content not to exceed 0.25% maximum
- Manufacturing facilities are ISO certified
- Mill Test Reports available with every order
Technical Specifications
| Product Type | Lap Joint Stub End |
|---|---|
| Material | Carbon Steel |
| Connection Type | Butt Weld |
| Flange Compatibility | Lap Joint Flange |
| Primary Function | Provide a Welded Stub End for a Rotatable Flange Assembly |
| Available Wall Options | Standard, Extra Heavy |
| Material Specification | ASTM A/SA234 WPB through 24" |
| Dimensional Standards | ASME/ANSI B16.9, B16.11, and B16.28 through 24" |
| Dimensions Over 24" | MSS-SP-48 |
| Maximum Carbon Content | 0.25% |
| Manufacturing | ISO-Certified Facilities |
| Material Documentation | Mill Test Reports Available with Every Order |
Lap Joint Stub End Configuration
Butt Weld End
The weld end connects directly to compatible carbon steel pipe to create the permanent piping connection.
Stub End Face
The formed face provides the seating surface used with the lap joint flange assembly.
Rotatable Backing Flange
The lap joint flange remains free to rotate around the stub end, helping simplify bolt-hole alignment during assembly.
Construction Details
Carbon steel weld lap joint stub ends are designed to be butt welded directly to compatible pipe. The lap joint flange fits over the pipe and bears against the formed stub-end face rather than being welded directly to the pipe.
This configuration allows the backing flange to rotate independently, which can simplify alignment during installation and make flange positioning more flexible in fabricated piping systems.
Why Choose a Lap Joint Stub End?
Flexible Flange Alignment
- Designed for use with lap joint flanges
- Backing flange can rotate for bolt-hole alignment
- Helps simplify field assembly
- Useful where flange orientation may need adjustment
- Supports removable flanged piping connections
Permanent Welded Pipe Connection
- Stub end butt welds directly to compatible pipe
- No threaded connection required
- Suitable for industrial and mechanical piping systems
- Available in Standard and Extra Heavy wall options
- Supports fabricated piping assemblies
Stub End & Lap Joint Flange Relationship
Stub End
The stub end is welded directly to the pipe and provides the face against which the lap joint flange bears.
Lap Joint Flange
The lap joint flange slips over the pipe and remains free to rotate around the stub end, allowing bolt-hole alignment without rotating the welded piping assembly.
Typical Applications
Industrial & Mechanical Piping
- Industrial process piping
- Mechanical piping systems
- Plant utility piping
- Equipment connections
- Fabricated piping assemblies
Flanged Piping Systems
- Lap joint flange assemblies
- Systems requiring flange alignment flexibility
- Removable piping sections
- Maintenance-access connections
- Commercial mechanical systems
Wall Thickness Options
Standard
Standard wall stub ends are available for compatible piping systems requiring conventional wall construction.
Extra Heavy
Extra Heavy stub ends provide increased wall thickness for compatible applications requiring heavier-duty construction.
Ask Willy: Need Pipe Size Help?
Use our common pipe diameters and wall thickness chart to confirm pipe size and wall thickness before ordering carbon steel weld lap joint stub ends. You can also review the stub end dimensional sheet below.
Standards & Documentation
ASTM Material Standard
Seamless butt weld fittings conform to ASTM A/SA234 WPB through 24".
Dimensional Standards
Weld fitting dimensions conform to ASME/ANSI B16.9, B16.11, and B16.28 through 24". Dimensions larger than 24" conform to MSS-SP-48.
Material Traceability
Mill Test Reports are available with every order, providing supporting material documentation for applicable project requirements.
Need More Carbon Steel Weld Fittings?
Browse our complete selection of carbon steel weld fittings, including stub ends, elbows, tees, reducers, laterals, caps, return bends, and other butt weld fittings.
Frequently Asked Questions
What is a carbon steel lap joint stub end?
A lap joint stub end is a butt weld fitting that is welded to the pipe and used with a lap joint flange to create a removable flanged connection.
How does a lap joint stub end work with a flange?
The stub end is welded to the pipe while the lap joint flange slips over the pipe and bears against the stub-end face. The flange remains free to rotate for bolt-hole alignment.
Why use a lap joint flange and stub end?
The configuration allows the backing flange to rotate independently, which can simplify alignment during installation and make disassembly of the flanged joint more convenient.
Is the lap joint flange welded to the pipe?
No. In a typical lap joint assembly, the stub end is welded to the pipe while the backing flange remains loose and rotatable behind the stub-end face.
What type of connection does the stub end use?
The stub end uses a butt weld connection to compatible carbon steel pipe.
What wall thickness options are available?
The supplied product information lists Standard and Extra Heavy options.
What material specification applies?
Seamless butt weld fittings conform to ASTM A/SA234 WPB through 24".
What dimensional standards apply?
The supplied information states that weld fitting dimensions conform to ASME/ANSI B16.9, B16.11, and B16.28 through 24", with fittings larger than 24" conforming to MSS-SP-48.
Are Mill Test Reports available?
Yes. Mill Test Reports are available with every order according to the supplied product information.
What should I verify before ordering?
Confirm the nominal pipe size, wall thickness, stub-end dimensions, compatible lap joint flange requirements, material requirements, and applicable piping-system specifications before ordering.
Important Ordering & Installation Notes
- Confirm the required nominal pipe size before ordering.
- Confirm the required wall thickness: Standard or Extra Heavy.
- Confirm compatibility with the intended lap joint flange.
- This fitting uses a butt weld connection to the adjoining pipe.
- The backing lap joint flange is not welded directly to the stub end.
- Verify carbon steel compatibility with the intended piping service.
- Confirm applicable pressure, temperature, dimensional, flange, and project requirements.
- Use qualified welding procedures and personnel as required by the applicable piping code or project specification.
- Inspect fitting ends and adjoining pipe before fit-up and welding.
- Confirm the lap joint flange is installed over the pipe before completing the stub-end assembly where required by the installation sequence.
- Mill Test Reports are available with every order.
- Refer to the dimensional PDF for fitting-specific measurements before fabrication.
