Merit Brass
150# Stainless Steel Union Socket Weld MSS SP114
- SKU:
- SWM487-SWM687
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Stainless Steel Union Socket Weld MSS SP114
150# Stainless Steel Socket Weld Unions MSS SP114 are heavy-pattern fittings designed to join two sections of compatible pipe while providing a serviceable connection that can be disassembled without cutting the adjoining piping. The socket weld ends create permanent welded pipe connections, while the union body provides a convenient break point for maintenance, inspection, or equipment replacement.
Available in 304 and 316 stainless steel, these fittings are manufactured as MSS SP-114 pattern fittings and are listed as low lead certified to NSF 61. Stainless steel construction helps resist corrosion, rust, scale, and contamination while maintaining strength at elevated temperatures.
Product Highlights
- 150# stainless steel socket weld union
- Socket weld connection on both ends
- Provides a serviceable in-line piping connection
- Allows connected piping sections to be separated at the union body
- Available in 304 and 316 stainless steel grades
- MSS SP-114 pattern fitting
- Low lead certified to NSF 61
- Corrosion-resistant stainless steel construction
- Useful near valves, pumps, filters, and equipment
- Helps prevent contamination from rust, scale, and small particles
- Resists corrosive attack from a wide range of industrial and chemical solutions and mixtures
- Maintains strength at elevated temperatures
- Designed for long service life in compatible applications
Technical Specifications
| Product Type | Socket Weld Union |
|---|---|
| Pressure Class | 150# |
| Material | Stainless Steel |
| Available Grades | 304 & 316 Stainless Steel |
| Pattern | MSS SP-114 |
| Connection Type | Socket Weld x Socket Weld |
| Configuration | Serviceable In-Line Union |
| Certification | Low Lead Certified NSF 61 |
| Primary Function | Joining Pipe While Allowing Future Disassembly |
| Primary Applications | Commercial, Industrial, Water and Process Piping Systems |
Socket Weld Union Construction
A socket weld union combines welded pipe connections with a removable union joint. Compatible pipe is inserted into the socket ends and welded in place, while the center union section allows the connected piping sections to be separated later.
This configuration is especially useful where a permanent welded connection is desired at the pipe ends, but future access is still needed for maintenance, equipment service, inspection, or system modification.
Manufactured from 304 or 316 stainless steel, these unions provide corrosion resistance and dependable performance in compatible commercial, industrial, water, and process piping systems.
Why Choose a Stainless Steel Socket Weld Union?
Serviceable Welded Connection
- Socket weld connection on both ends
- Provides permanent welded pipe attachment
- Union body allows future disassembly
- Useful near serviceable system components
- Reduces the need to cut piping during maintenance
Corrosion Resistance
- Resists rust and scale formation
- Suitable for demanding piping environments
- Resists attack from many industrial and chemical solutions and mixtures
- Helps maintain cleaner process media
- Provides long service life compared with many alternative metals
Socket Weld Union vs. Socket Weld Coupling
Socket Weld Union
- Socket weld connection on both ends
- Provides a removable center union joint
- Allows future piping disassembly
- Useful near equipment requiring service
- Designed for access and maintenance
Socket Weld Coupling
- Socket weld connection on both ends
- Creates a permanent straight in-line connection
- Does not provide a removable union joint
- Commonly used to extend or join pipe runs
- Different service function from a union
304 vs. 316 Stainless Steel
304 Stainless Steel
304 stainless steel provides corrosion resistance for a wide range of general-purpose water, commercial, and industrial piping applications. It is commonly selected where dependable stainless steel performance is required without the additional corrosion resistance provided by 316 stainless steel.
316 Stainless Steel
316 stainless steel provides enhanced corrosion resistance for more aggressive environments and is commonly selected for applications involving chemicals, chlorides, process fluids, marine exposure, and other demanding service conditions.
Common Applications
Commercial & General Piping
- Water piping systems
- Mechanical piping installations
- Valve connections
- Equipment service connections
- Stainless steel utility piping
Industrial & Process Applications
- Industrial process piping
- Chemical processing systems
- Water treatment applications
- Pump and filter connections
- Corrosion-resistant serviceable piping assemblies
Installation & Selection Guidance
- Confirm the required nominal pipe size before ordering.
- Select 304 or 316 stainless steel based on the operating environment and required corrosion resistance.
- Verify that the mating pipe outside diameter and socket dimensions are compatible with both ends of the fitting.
- Confirm system pressure and temperature requirements before installation.
- Verify compatibility between the stainless steel fitting and the system media.
- Use appropriate socket weld procedures for the stainless steel grade and piping system.
- Maintain proper pipe insertion and weld preparation according to applicable fabrication requirements.
- Install the union where adequate clearance is available for future disassembly and servicing.
- Inspect completed welds and the union joint before placing the system into service.
- Installation should be completed in accordance with applicable piping codes, welding procedures, and project specifications.
Product Documents
Merit Brass Heavy Pattern 150# Dimensions
Review dimensional information for Merit Brass stainless steel MSS pattern fittings, including applicable socket weld union dimensions.
Common Pipe Diameters & Wall Thicknesses
Reference common pipe outside diameters and wall thicknesses when selecting compatible piping and socket weld components.
Need Help Selecting a Stainless Steel Socket Weld Union?
Our industrial PVF specialists can help review your pipe size, stainless steel grade, pressure requirements, application, and socket weld connection requirements before you order.
Frequently Asked Questions
What is a socket weld union used for?
A socket weld union is used to join two sections of pipe with welded socket connections while providing a removable union joint for future maintenance or system access.
What pressure class is this fitting?
This fitting is listed as a 150# stainless steel socket weld union.
What stainless steel grades are available?
These unions are available in 304 and 316 stainless steel.
What pattern does this fitting conform to?
The fitting is identified as an MSS SP-114 pattern stainless steel fitting.
Is this fitting low lead certified?
Yes. The supplied product information identifies these fittings as low lead certified to NSF 61.
What connection style does this union use?
The fitting uses socket weld connections on both ends, with compatible pipe inserted into the sockets and welded in place.
How does the union come apart if the pipe ends are welded?
The pipe remains welded to the two end sections of the fitting. The union body provides a mechanical joint between those sections that can be separated for service.
How is a socket weld union different from a socket weld coupling?
A socket weld union provides a removable center joint for future disassembly, while a socket weld coupling creates a permanent in-line connection without a serviceable union joint.
What is the difference between 304 and 316 stainless steel?
Both grades provide strong corrosion resistance. 316 stainless steel generally provides additional resistance in more aggressive chemical, chloride, marine, and corrosive environments.
Where can I find fitting dimensions?
Use the Merit Brass Heavy Pattern 150# Dimensions document in the Product Documents section above.
Important Ordering Notes
- Product is a 150# stainless steel socket weld union.
- Available in 304 and 316 stainless steel grades.
- Manufactured as an MSS SP-114 pattern fitting.
- Low lead certified to NSF 61.
- Socket weld x socket weld connection configuration.
- Provides a serviceable in-line union connection.
- Confirm the nominal pipe size before ordering.
- Select the appropriate 304 or 316 stainless steel grade for the application.
- Verify pipe and socket dimensional compatibility before installation.
- Provide adequate clearance for future union disassembly and maintenance.
- Confirm system pressure, temperature, and media compatibility before use.
- Refer to the Merit Brass dimensional documentation for applicable fitting dimensions.
