Service Metal
316 Stainless Steel MSS SP-43 Type A Butt Weld Stub End – Sch 40
- Availability:
- Allow 1-2 Days to Ship
- Weight:
- 0.00 LBS
Description
316 Stainless Steel MSS SP-43 Type A Butt Weld Stub End – Sch 40
316/L Stainless Steel Schedule 40S Type A Butt Weld Stub Ends are manufactured from ASTM A/SA403 WP316/L stainless steel and designed for use with compatible lap joint flanges. These fittings provide excellent corrosion resistance, dependable weldability, and durable performance in demanding sanitary, chemical, food processing, marine, and industrial piping systems.
Manufactured to MSS SP-43 Type A dimensional standards, these stub ends feature butt weld connections for permanent attachment to Schedule 40S stainless steel pipe while allowing the accompanying lap joint flange to rotate independently for easier bolt-hole alignment.
Product Highlights
- ASTM A/SA403 WP316/L stainless steel construction
- Schedule 40S wall thickness
- MSS SP-43 Type A stub end configuration
- Butt weld pipe connection
- Designed for use with compatible lap joint flanges
- Excellent corrosion resistance
- Low-carbon 316/L construction supports dependable weldability
- Lap joint flange can rotate independently for easier alignment
- Suitable for sanitary, chemical, food processing, and industrial systems
- Available in multiple nominal pipe sizes
Technical Specifications
| Product Type | Butt Weld Stub End |
|---|---|
| Material | 316/L Stainless Steel |
| Material Specification | ASTM A/SA403 WP316/L |
| Pipe Schedule | Schedule 40S |
| Connection Type | Butt Weld (BW) |
| Stub End Type | MSS SP-43 Type A |
| Flange Compatibility | Designed for use with compatible lap joint flanges |
| Available Sizes | Multiple nominal pipe sizes |
| Applications | Sanitary, chemical, food processing, marine, commercial, industrial, and process piping systems |
Construction Details
316/L Stainless Steel
Manufactured from low-carbon 316/L stainless steel for excellent corrosion resistance and dependable weldability in demanding service environments.
Type A Lap Profile
The MSS SP-43 Type A configuration provides a formed lap and barrel profile designed for proper fit-up with compatible lap joint flanges.
Schedule 40S Fit-Up
Precision formed for butt weld installation with compatible Schedule 40S stainless steel pipe while maintaining reliable alignment and flange-facing geometry.
Material & Stub End Design
Material Construction
- 316/L stainless steel
- ASTM A/SA403 WP316/L specification
- Excellent corrosion resistance
- Low-carbon chemistry for dependable weldability
- Suitable for demanding process environments
Stub End Configuration
- MSS SP-43 Type A design
- Schedule 40S wall thickness
- Butt weld pipe connection
- Lap and barrel profile
- Designed for lap joint flange assemblies
- Allows independent flange rotation
Why Use a Stub End with a Lap Joint Flange?
A stub end is butt welded directly to the pipe while the lap joint flange remains loose behind the formed lap. Because the flange can rotate independently, bolt-hole alignment can be simplified during installation. This arrangement can also make flange disassembly and system maintenance more convenient.
Why Use 316/L Stainless Steel?
316/L stainless steel provides excellent resistance to corrosion, pitting, and many chloride-containing environments. Its low-carbon chemistry also helps reduce carbide precipitation during welding, supporting dependable performance in permanent stainless steel piping systems.
Schedule 40S Construction
Schedule 40S provides a heavier wall configuration than Schedule 10S and is commonly used where additional mechanical strength is required. The stub end should be matched with compatible Schedule 40S stainless steel pipe and the appropriate lap joint flange.
Available Sizes
These Schedule 40S 316/L stainless steel Type A butt weld stub ends are available in multiple nominal pipe sizes. Select the stub end size that matches the nominal diameter of the Schedule 40S stainless steel pipe and compatible lap joint flange being installed.
Typical Applications
Sanitary & Process
- Food processing systems
- Sanitary piping applications
- Chemical processing systems
- Process fluid handling
Industrial & Flanged Systems
- Marine piping systems
- Industrial process piping
- Lap joint flange assemblies
- Systems requiring easier flange alignment or disassembly
Pipe Size Reference
Need help confirming nominal pipe diameter or Schedule 40S wall thickness before ordering? Use our common pipe diameter and wall thickness reference chart to verify the correct pipe size for your installation.
Product Documents
Service Metal Schedule 40S Stub End Spec Sheet
Review the product specification sheet for dimensions and additional manufacturer information for Schedule 40S stainless steel butt weld stub ends.
Certificate of Conformance
Review the available Certificate of Conformance documentation for applicable product and material information.
Need Help Selecting the Correct 316 Stainless Steel Stub End?
Our industrial PVF specialists can help confirm your required pipe size, Schedule 40S wall thickness, material, stub end type, and compatible lap joint flange before you order.
Frequently Asked Questions
What is a butt weld stub end used for?
A butt weld stub end is welded to the end of a pipe and used with a lap joint flange to create a removable flanged piping connection.
What material are these stub ends made from?
These stub ends are manufactured from ASTM A/SA403 WP316/L stainless steel.
What pipe schedule are these stub ends designed for?
These fittings are designed for Schedule 40S stainless steel piping systems.
What standard do these stub ends follow?
These stub ends are manufactured to MSS SP-43 Type A dimensional requirements.
Why use a lap joint flange with a stub end?
The stub end provides the flange-facing surface while the lap joint flange remains free to rotate, which can simplify bolt-hole alignment during assembly.
Is the lap joint flange included?
The supplied product information does not state that a lap joint flange is included. Verify flange requirements separately before ordering.
Why choose 316/L stainless steel?
316/L stainless steel provides excellent corrosion resistance and is commonly used in sanitary, chemical, marine, food processing, and industrial piping applications.
What sizes are available?
The supplied product information identifies these Schedule 40S 316/L stainless steel Type A stub ends as being available in multiple nominal pipe sizes.
How do I select the correct stub end?
Select the nominal stub end size that matches the Schedule 40S stainless steel pipe and verify compatibility with the lap joint flange used in the assembly.
Important Ordering & Installation Notes
- Select the nominal stub end size that matches the Schedule 40S stainless steel pipe being installed.
- Available in multiple nominal pipe sizes.
- Material: ASTM A/SA403 WP316/L stainless steel.
- Pipe schedule: Schedule 40S.
- Configuration: MSS SP-43 Type A butt weld stub end.
- Connection: Butt weld (BW).
- Designed for use with compatible lap joint flanges.
- Verify pipe size, schedule, stub-end dimensions, flange compatibility, pressure requirements, and service conditions before installation.
- Professional stainless steel welding and installation practices should be followed for reliable system performance.
- See manufacturer specifications for dimensional tolerances, pressure information, and installation requirements.
