Merit Brass
150# Stainless Steel Union MSS SP114
- SKU:
- M487-M687
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Stainless Steel Union MSS SP114
150# Stainless Steel Unions MSS SP114 are threaded fittings designed to join two sections of piping while allowing the connection to be disassembled without cutting or rotating the adjoining pipe. The union configuration provides a practical service connection for maintenance, equipment replacement, inspection, and other applications where future piping access may be required.
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 providing dependable performance in commercial, industrial, water, and process piping applications.
Product Highlights
- 150# stainless steel threaded union
- Designed to provide a removable in-line piping connection
- Allows piping to be disconnected without cutting adjoining pipe
- 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 for maintenance and equipment service connections
- 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 straightforward installation and servicing
- Long service-life potential in compatible applications
Technical Specifications
| Product Type | Threaded Union |
|---|---|
| Pressure Class | 150# |
| Material | Stainless Steel |
| Available Grades | 304 & 316 Stainless Steel |
| Pattern | MSS SP-114 |
| Connection Type | Threaded |
| 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 |
Threaded Union Construction
A threaded union creates an in-line pipe connection that can be separated later without cutting the piping or rotating long sections of adjoining pipe.
The union body provides a serviceable connection point that is especially useful near valves, pumps, filters, equipment, and other system components that may require future inspection, repair, or replacement.
Manufactured from 304 or 316 stainless steel, these unions provide corrosion resistance and dependable threaded performance in compatible commercial, industrial, water, and process piping systems.
Why Choose a Stainless Steel Union?
Serviceable Pipe Connection
- Allows piping sections to be disconnected
- Useful for maintenance and equipment replacement
- Reduces the need to cut existing pipe during service
- Provides a practical connection near valves and equipment
- Suitable for piping systems requiring future access
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
Union vs. Standard Coupling
Threaded Union
- Designed to be disassembled after installation
- Provides a serviceable in-line connection
- Useful near equipment requiring future maintenance
- Allows pipe separation without cutting the line
- Well suited for removable piping connections
Standard Coupling
- Designed to join two threaded pipe sections
- Typically used as a more permanent in-line connection
- Does not provide the same convenient disassembly point
- Commonly used for straight pipe extensions
- 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
- Commercial plumbing systems
- Mechanical piping installations
- Valve connections
- Equipment service connections
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 threaded pipe or fittings are compatible with the union.
- Confirm system pressure and temperature requirements before installation.
- Verify compatibility between the stainless steel fitting and the system media.
- Use appropriate thread sealant suitable for the piping material, media, pressure, and temperature.
- Install the union where adequate access is available for future disassembly and maintenance.
- Avoid over-tightening threaded stainless steel connections.
- Inspect the completed connection for leaks before placing the system into service.
- Installation should be completed in accordance with applicable piping codes and project specifications.
Product Documents
Merit Brass Heavy Pattern 150# Dimensions
Review dimensional information for Merit Brass stainless steel MSS pattern fittings, including applicable union dimensions.
Common Pipe Diameters & Wall Thicknesses
Reference common pipe outside diameters and wall thicknesses when selecting compatible piping and threaded connection components.
Need Help Selecting a Stainless Steel Union?
Our industrial PVF specialists can help review your pipe size, stainless steel grade, pressure requirements, application, and service connection requirements before you order.
Frequently Asked Questions
What is a stainless steel union used for?
A stainless steel union is used to join two sections of threaded piping while providing a connection point that can be disassembled later for maintenance, inspection, or equipment replacement.
What pressure class is this fitting?
This fitting is listed as a 150# stainless steel 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 union low lead certified?
Yes. The supplied product information identifies these fittings as low lead certified to NSF 61.
How is a union different from a standard coupling?
A union is designed to provide a connection that can be separated later without cutting the pipe, while a standard coupling is generally used as a more permanent straight in-line connection.
Where are unions commonly installed?
Unions are commonly installed near valves, pumps, filters, equipment, and other components that may require future maintenance, inspection, or replacement.
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.
Can stainless steel unions be used at elevated temperatures?
The supplied product information notes that stainless steel provides greater strength at elevated temperatures. Actual allowable pressure and temperature depend on the complete piping system and application requirements.
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 threaded union.
- Available in 304 and 316 stainless steel grades.
- Manufactured as an MSS SP-114 pattern fitting.
- Low lead certified to NSF 61.
- Designed to provide a serviceable in-line piping connection.
- Confirm the nominal pipe size before ordering.
- Select the appropriate 304 or 316 stainless steel grade for the application.
- Verify thread compatibility with mating pipe or fittings before installation.
- Provide adequate access 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.
