Description
Midland Aluminum Unions
Midland Aluminum Unions provide a convenient threaded connection that allows sections of piping to be disconnected and reassembled without cutting, rotating, or disturbing the surrounding pipe.
Manufactured from lightweight, corrosion-resistant aluminum, these unions provide dependable performance while helping reduce overall system weight. Precision-machined female NPT threaded connections and a three-piece union design make them well suited for compressed air, pneumatic, utility, industrial, and other compatible general-purpose piping systems.
Product Highlights
- Three-piece threaded union design
- Lightweight aluminum construction
- Female NPT x Female NPT threaded connections
- Allows piping sections to be disconnected without rotating the pipe
- Precision-machined NPT threads
- Corrosion-resistant aluminum material
- Available in multiple nominal pipe sizes
- Useful for maintenance, inspection, and equipment replacement
- Suitable for industrial, pneumatic, compressed air, and utility piping systems
- Manufactured by Midland Industries
Technical Specifications
| Product Type | Threaded Union |
|---|---|
| Brand | Midland |
| Material | Aluminum |
| Connection Type | Female NPT x Female NPT |
| Thread Type | NPT |
| Construction | Three-Piece Union |
| Available Sizes | Multiple Nominal Pipe Sizes |
| Primary Function | Creating a Removable Threaded Pipe Connection |
| Typical Applications | Industrial, Pneumatic, Compressed Air, Utility, Mechanical, and General-Purpose Piping Systems |
Union Configuration
Female NPT Connection
One side features a precision-machined female NPT connection for installation with a compatible male-threaded pipe, nipple, fitting, valve, or equipment connection.
Union Nut
The center union nut joins the two threaded halves and allows the connection to be separated without rotating the connected piping.
Female NPT Connection
The opposite side also features a female NPT connection for connection to another compatible male-threaded piping component.
Construction Details
Midland Aluminum Unions are manufactured from durable aluminum to provide dependable strength and corrosion resistance while minimizing overall system weight.
Precision-machined female NPT threads provide consistent engagement with compatible male-threaded piping components when installed using accepted threaded piping practices.
The three-piece union design allows connected sections to be separated for inspection, maintenance, equipment replacement, or system modification without cutting or rotating the surrounding piping.
Why Choose an Aluminum Union?
Service-Friendly Connection
- Allows piping to be disconnected without cutting
- No need to rotate surrounding pipe
- Useful for equipment replacement
- Simplifies inspection and maintenance
- Supports future system modifications
Lightweight Aluminum Construction
- Lower weight than many steel alternatives
- Corrosion-resistant material
- Easy handling during installation
- Useful in weight-sensitive piping systems
- Designed for compatible industrial service
NPT Threaded Connections
Female NPT x Female NPT
Both ends use female NPT threads for connection to compatible male NPT pipe, nipples, fittings, valves, or equipment connections.
Thread Sealing
Apply an approved thread sealant or PTFE tape to the mating male NPT connections according to the piping material, system media, and installation requirements.
Typical Applications
Pneumatic & Utility
- Compressed air systems
- Pneumatic piping
- Utility piping
- Equipment connections
- Removable service connections
Industrial & General Service
- Industrial piping systems
- Mechanical equipment
- Maintenance and repair
- Equipment replacement points
- Compatible general-purpose piping systems
Size Selection
Midland Aluminum Unions are available in multiple nominal pipe sizes.
Confirm the required nominal pipe size and verify that both mating components use compatible male NPT threads before ordering.
Our pipe and fitting specialists can help review your nominal pipe size, female NPT connections, service-access requirements, system media, pressure, temperature, and material compatibility before you order.
Email the GetPipe.com Team Visit Quick SupportFrequently Asked Questions
What material are these unions made from?
The fittings are manufactured from aluminum.
What type of connections do they use?
They use female NPT threaded connections on both ends.
What is a union fitting used for?
A union creates a removable threaded connection that allows piping sections to be disconnected without cutting or rotating the surrounding pipe.
How does the three-piece design work?
The two threaded ends connect to the piping while the center union nut joins the halves together and allows them to be separated when service is required.
Are multiple sizes available?
Yes. Midland Aluminum Unions are available in multiple nominal pipe sizes.
Why choose aluminum?
Aluminum provides a lightweight, corrosion-resistant option for compatible threaded piping systems.
Should thread sealant be used?
Apply an approved thread sealant or PTFE tape to the mating NPT connections according to the application requirements.
Can these unions be used in compressed air systems?
The supplied product information identifies compressed air and pneumatic systems among the intended applications.
Can aluminum be connected to dissimilar metals?
It may be used with compatible materials, but galvanic compatibility should be considered when aluminum is connected to dissimilar metals.
What should I verify before ordering?
Confirm the nominal pipe size, mating male NPT threads, system pressure, temperature, media compatibility, and installation requirements.
Important Ordering & Installation Notes
- This listing is for Midland Aluminum Unions.
- Available in multiple nominal pipe sizes.
- Both ends use female NPT threaded connections.
- Verify both mating components use compatible male NPT threads.
- Apply an approved thread sealant or PTFE tape to threaded connections where required.
- Ensure the union halves are properly aligned before tightening the union nut.
- Avoid using the union nut to force misaligned piping together.
- Verify aluminum is suitable for the intended media and operating environment.
- Confirm pressure and temperature requirements before installation.
- Consider galvanic compatibility when aluminum is connected to dissimilar metals.
- Avoid excessive tightening that could damage the fitting or mating threads.
- Support connected piping to avoid excessive mechanical loading on the union.
- Inspect all threaded and union mating surfaces before assembly.
- Check completed connections for leakage before placing the system into service.
- Install according to accepted piping practices and Midland manufacturer recommendations.
