Service Metal
150# Black Malleable Unions
- SKU:
- SBU
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Black Malleable Iron Union
150# Black Malleable Iron Unions are designed to provide a secure, detachable connection between threaded pipe sections, making maintenance, equipment replacement, and piping modifications easier without cutting or permanently separating the pipe.
Manufactured from durable malleable iron, these Class 150 unions are suitable for industrial, commercial, plumbing, mechanical, water, gas, oil, and fire protection piping systems where serviceability and dependable threaded connections are important.
Product Highlights
- Detachable threaded union connection
- Allows piping sections to be separated without cutting pipe
- Useful for maintenance, repair, replacement, and equipment service
- Female NPT threaded end connections
- Durable black malleable iron construction
- Class 150 fitting
- Malleable castings conform to ASTM A197
- Malleable unions conform to ASME B16.39
- NPT threads conform to ASME B1.20.1
- Class 150 fittings are UL Listed and FM Approved at 300 PSI
- Manufactured in an ISO-certified facility
- Country of origin: Thailand & China
Technical Specifications
| Product Type | Threaded Union |
|---|---|
| Material | Malleable Iron |
| Finish | Black |
| Pressure Class | 150# |
| Connection Type | Female NPT Threaded |
| Configuration | Detachable Straight Union |
| Primary Function | Serviceable / Removable Pipe Connection |
| Casting Standard | ASTM A197 |
| Union Standard | ASME B16.39 |
| Thread Standard | ASME B1.20.1 |
| Listings / Approvals | UL Listed & FM Approved at 300 PSI |
| Manufacturing | ISO-Certified Facility |
| Country of Origin | Thailand & China |
Construction & Applications
Malleable Iron Construction
Manufactured from malleable iron castings conforming to ASTM A197 for dependable strength and durability in threaded piping installations.
Detachable Connection
The union design allows the piping connection to be separated at the union body without rotating long sections of pipe or cutting the piping system.
Standard NPT Threads
Female NPT threaded end connections conform to ASME B1.20.1 for compatibility with properly sized male-threaded pipe.
Why Use a Pipe Union?
Easier Maintenance
A union provides a convenient break point in the piping system, allowing equipment, valves, or pipe sections to be removed and serviced more easily.
No Pipe Cutting Required
Unlike a standard coupling, a union can be disconnected at the union nut, allowing the adjoining piping sections to separate without cutting the pipe.
Typical Applications
Industrial & Mechanical Piping
- Industrial piping systems
- Commercial piping
- Mechanical equipment connections
- Valve installations
- Serviceable piping assemblies
Common Services
- Water piping
- Gas piping
- Oil piping
- Fire protection systems
- General utility piping
Ask Willy: Need Pipe Size Help?
Use our common pipe diameters and wall thickness chart to confirm sizing before ordering malleable iron fittings. You can also review the union specification sheet and Certificate of Conformance below.
Standards & Approvals
ASTM A197
Malleable iron castings conform to ASTM A197.
ASME B16.39
Malleable unions conform to ASME B16.39.
UL & FM
Class 150 fittings are UL Listed and FM Approved at 300 PSI.
Need More Black Malleable Iron Fittings?
Shop our complete selection of 150# black malleable iron fittings, including unions, tees, elbows, couplings, bushings, caps, plugs, and other threaded fittings for industrial and commercial piping systems.
Frequently Asked Questions
What is a malleable iron union used for?
A union is used to join two threaded pipe sections while providing a connection that can later be disconnected for maintenance, repair, replacement, or system modification.
How is a union different from a coupling?
A coupling joins two threaded pipe ends but generally requires one pipe section to be rotated or otherwise removed for disassembly. A union can be separated at the union body, allowing the adjoining pipe sections to remain in position.
Why are unions commonly installed near equipment?
Installing a union near valves, pumps, regulators, or other equipment can make future removal and service easier because the piping can be disconnected without cutting the line.
What type of connections does this union use?
The union uses female NPT threaded end connections.
What material is this fitting made from?
The union is manufactured from malleable iron castings conforming to ASTM A197.
What standard applies specifically to malleable iron unions?
The supplied product information states that malleable unions conform to ASME B16.39.
What thread standard applies?
NPT threads conform to ASME B1.20.1.
Is this a Class 150 fitting?
Yes. This is a 150# black malleable iron union.
Is this fitting UL Listed and FM Approved?
Yes. The supplied product information states that Class 150 fittings are UL Listed and FM Approved at 300 PSI.
Where are these fittings manufactured?
The listed countries of origin are Thailand and China, and the manufacturing facility is ISO certified.
Important Ordering & Installation Notes
- Confirm the required nominal pipe size before ordering.
- This union uses female NPT threaded end connections.
- NPT threads conform to ASME B1.20.1.
- Malleable unions conform to ASME B16.39 according to the supplied product information.
- Position unions where future maintenance or equipment removal may be required.
- Use compatible pipe thread sealant and accepted threaded piping installation practices.
- Verify system pressure, service, code, and approval requirements before installation.
- Refer to the specification sheet and Certificate of Conformance for additional product information.
