Merit Brass
Stainless Steel Weld Type "A" Stub End MSS
- SKU:
- SWSTASE
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
Stainless Steel Weld Type "A" Stub End
Stainless Steel Weld Type "A" Stub Ends are designed for use with standard lap joint flanges in compatible stainless steel piping systems. The stub end provides the sealing face and weld connection while the lap joint flange remains free to rotate around the piping assembly for easier bolt-hole alignment.
For Type "A" stub ends, the lap thickness is greater than or equal to the nominal thickness of the pipe wall. Available in Schedule 10 and Schedule 40, these fittings are manufactured from stainless steel raw material conforming to ASTM A312 and are produced and tested to recognized ASTM, ASME, ANSI, and MSS standards.
Product Highlights
- Stainless steel Type "A" butt weld stub end
- Designed for use with standard lap joint flanges
- Lap thickness is greater than or equal to the nominal pipe wall thickness
- Available in Schedule 10 and Schedule 40
- Manufactured and tested in accordance with ASTM A403 and ASME SA403/SA403M
- Raw material conforms to ASTM A312
- Wall thicknesses conform to ANSI B16.9, ANSI B16.28, and MSS SP-43
- Supports rotating lap joint flange alignment during installation
- Suitable for permanent welded stainless steel piping systems
- Designed for commercial, industrial, and process piping applications
Technical Specifications
| Product Type | Type "A" Butt Weld Stub End |
|---|---|
| Material | Stainless Steel |
| Available Schedules | Schedule 10 & Schedule 40 |
| Connection Type | Butt Weld |
| Stub End Type | Type "A" |
| Flange Compatibility | Standard Lap Joint Flanges |
| Lap Thickness | Greater Than or Equal to Nominal Pipe Wall Thickness |
| Raw Material Standard | ASTM A312 |
| Manufacturing / Testing Standard | ASTM A403 & ASME SA403/SA403M |
| Dimensional / Wall Thickness Standards | ANSI B16.9, ANSI B16.28 & MSS SP-43 |
Type "A" Stub End Design
A Type "A" stub end is designed to work with a standard lap joint flange. The stub end is welded to the pipe, while the lap joint flange remains loose around the pipe assembly.
This allows the flange to rotate independently, making bolt-hole alignment with the mating flange easier during installation.
Lap Thickness
For Type "A" stub ends, the lap thickness is greater than or equal to the nominal thickness of the connected pipe wall.
This distinguishes the Type "A" configuration and should be verified along with pipe schedule, nominal size, and lap joint flange compatibility before ordering.
Butt Weld Construction
The pipe end of the stub end is designed for butt weld installation into compatible stainless steel piping systems. Proper fit-up and welding create a permanent connection between the stub end and adjoining pipe.
Confirm pipe size, schedule, material requirements, and welding procedure before fabrication or installation.
Schedule 10 vs. Schedule 40
Schedule 10
- Lighter wall option for compatible piping systems
- Useful where lower wall thickness is appropriate
- Manufactured and tested to applicable ASTM and ASME requirements
- Confirm pipe schedule and lap thickness before ordering
Schedule 40
- Heavier wall than Schedule 10
- Suitable where greater wall thickness is required
- Manufactured and tested to applicable ASTM and ASME requirements
- Confirm pipe schedule and lap thickness before welding
Why Use a Lap Joint Stub End?
Installation Flexibility
- Lap joint flange can rotate around the stub end
- Simplifies bolt-hole alignment
- Useful where flange orientation must be adjusted during assembly
- Supports easier installation in field piping systems
Service & Maintenance
- Useful in systems requiring flange disassembly
- Provides a welded process connection at the stub end
- Allows the backing flange to remain mechanically independent
- Common in stainless steel process piping assemblies
Standards & Construction
These stainless steel Type "A" stub ends are manufactured from raw material conforming to ASTM A312. Manufacturing and testing are performed in accordance with ASTM A403 and ASME SA403/SA403M.
Applicable wall thicknesses and dimensions conform to ANSI B16.9, ANSI B16.28, and MSS SP-43 for compatibility with standard stainless steel butt weld piping systems.
Common Applications
Process Piping
- Industrial process piping
- Water treatment systems
- Commercial stainless steel piping
- Mechanical equipment connections
- General stainless steel fabrication
Lap Joint Flange Assemblies
- Standard lap joint flange connections
- Systems requiring easier flange alignment
- Food and beverage process systems
- Chemical processing applications
- Corrosion-resistant piping assemblies
Need Help With Butt Weld Fitting Selection?
Confirm the nominal pipe size, Schedule 10 or Schedule 40 wall thickness, Type "A" stub end requirement, lap thickness, stainless steel material requirements, and lap joint flange compatibility before ordering.
Use the product documents below to review butt weld fitting dimensions and certification information.
Product Documents
Stainless Steel Butt Weld Dimensions
Use this dimensional reference to verify stainless steel butt weld fitting dimensions before ordering, fabrication, or installation.
- Reference dimensions for stainless steel butt weld fittings
- Useful for confirming stub end dimensions
- Supports Schedule 10 and Schedule 40 fitting selection
- Recommended for checking lap and pipe compatibility before welding
Stainless Steel Certification Letter
Use this certification document for supporting information regarding the stainless steel butt weld fitting product line and applicable manufacturing requirements.
- Certification reference for stainless steel butt weld fittings
- Useful for project documentation and submittal review
- Supports verification of applicable product standards
- Recommended where certification documentation is required
Frequently Asked Questions
What is a Type "A" stub end?
A Type "A" stub end is designed for use with standard lap joint flanges and has a lap thickness greater than or equal to the nominal thickness of the pipe wall.
What type of flange is used with this stub end?
Type "A" stub ends are designed for use with standard lap joint flanges.
Why use a lap joint flange with a stub end?
The lap joint flange can rotate around the stub end, making bolt-hole alignment easier during piping assembly.
What schedules are available?
The supplied product information lists Schedule 10 and Schedule 40 material options.
What connection type is used?
The stub end uses a butt weld connection to the compatible stainless steel pipe.
What material standard applies to the raw material?
The raw stainless steel material conforms to ASTM A312.
What manufacturing and testing standards apply?
The fittings are manufactured and tested in accordance with ASTM A403 and ASME SA403/SA403M.
What dimensional standards apply?
Applicable wall thicknesses and dimensions conform to ANSI B16.9, ANSI B16.28, and MSS SP-43.
Where can I find stub end dimensions?
Use the Stainless Steel Butt Weld Dimensions PDF in the Product Documents section above.
Is certification documentation available?
Yes. The Stainless Steel Certification Letter PDF is available in the Product Documents section above.
Important Ordering Notes
- Product type: Stainless Steel Type "A" Butt Weld Stub End.
- Designed for use with standard lap joint flanges.
- Lap thickness is greater than or equal to the nominal pipe wall thickness.
- Available in Schedule 10 and Schedule 40.
- Raw material conforms to ASTM A312.
- Manufactured and tested to ASTM A403 and ASME SA403/SA403M.
- Applicable wall thicknesses and dimensions conform to ANSI B16.9, ANSI B16.28, and MSS SP-43.
- Confirm nominal pipe size, schedule, and lap dimensions before ordering.
- Verify compatibility with the intended lap joint flange before installation.
- Use welding procedures appropriate for the stainless steel material and piping system.
- Refer to both Product Documents for dimensional and certification information.
