Service Metal
150# Galvanized Malleable Unions
- SKU:
- SGU
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Galvanized Malleable Iron Union
150# Galvanized Malleable Iron Unions are designed to connect two threaded pipe sections while allowing the joint to be disconnected for maintenance, repair, or equipment replacement without cutting the pipe.
Manufactured from durable malleable iron with a hot-dip galvanized finish, these Class 150 unions provide dependable strength and added corrosion resistance for industrial, commercial, plumbing, mechanical, water, and outdoor piping applications.
Product Highlights
- Three-piece threaded union design
- Allows piping sections to be disconnected without cutting pipe
- Female NPT threaded connections
- Designed for maintenance-friendly piping installations
- Useful near valves, pumps, equipment, and serviceable components
- Hot-dip galvanized finish for added corrosion resistance
- Durable malleable iron construction
- Class 150 fitting
- Malleable castings conform to ASTM A197
- Hot-dipped galvanized fittings conform to ASTM A153
- 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
- Galvanized fittings meet ANSI/NSF 61-4 Annex G and CA AB1953 (<0.25% lead)
- Manufactured in an ISO-certified facility
- Country of origin: Thailand & China
Technical Specifications
| Product Type | Threaded Union |
|---|---|
| Material | Malleable Iron |
| Finish | Hot-Dip Galvanized |
| Pressure Class | 150# |
| Connection Type | Female NPT x Female NPT |
| Configuration | Three-Piece Union |
| Primary Function | Removable Threaded Pipe Connection |
| Casting Standard | ASTM A197 |
| Galvanizing Standard | ASTM A153 |
| Union Standard | ASME B16.39 |
| Thread Standard | ASME B1.20.1 |
| Listings / Approvals | UL Listed & FM Approved at 300 PSI |
| Lead / Potable Water Compliance | ANSI/NSF 61-4 Annex G and CA AB1953 (<0.25% lead) |
| 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 systems.
Three-Piece Union Design
The union consists of two threaded ends joined by a central union nut, allowing the connection to be separated without rotating or cutting the adjoining pipe.
Hot-Dip Galvanized Finish
The galvanized coating conforms to ASTM A153 and provides additional protection against rust and corrosion in moisture-prone and outdoor installations.
Why Use a Pipe Union?
Easier Maintenance
A union provides a convenient disconnect point in a threaded piping system, making it easier to service or replace valves, pumps, equipment, and other components.
No Pipe Cutting Required
The center union nut allows the joint to be separated without cutting pipe or disassembling long sections of the surrounding piping system.
Typical Applications
Commercial & Mechanical Piping
- Commercial plumbing systems
- Mechanical piping
- Water distribution systems
- Pump connections
- Valve installations
- Serviceable equipment connections
Galvanized Applications
- Outdoor piping
- Moist environments
- Water-service applications
- Industrial installations
- General galvanized piping systems
Ask Willy: Need Pipe Size Help?
Use our common pipe diameters and wall thickness chart to confirm sizing before ordering galvanized malleable iron unions. You can also review the union specification sheet and Certificate of Conformance below.
Standards & Approvals
ASTM Standards
Malleable iron castings conform to ASTM A197, while hot-dipped galvanized fittings conform to ASTM A153.
ASME Standards
Malleable unions conform to ASME B16.39, while NPT threads conform to ASME B1.20.1.
UL, FM & Lead Compliance
Class 150 fittings are UL Listed and FM Approved at 300 PSI. Galvanized fittings meet ANSI/NSF 61-4 Annex G and CA AB1953 requirements listed in the supplied product information.
Related Malleable Iron Standards
- Malleable fitting dimensions conform to ASME B16.3 where applicable.
- Malleable bushings, plugs, and locknuts conform to ASME B16.14.
- Malleable unions conform to ASME B16.39.
- Class 300 fittings are UL Listed according to the supplied product information.
- NPT threads on applicable fittings conform to ASME B1.20.1.
Need More Galvanized Malleable Iron Fittings?
Shop our complete selection of 150# galvanized malleable iron fittings, including unions, tees, elbows, couplings, bushings, caps, plugs, and other threaded fittings.
Frequently Asked Questions
What is a pipe union used for?
A union connects two threaded pipe sections while providing a convenient point where the piping can later be disconnected for maintenance, repair, or equipment replacement.
How is a union different from a coupling?
A coupling creates a conventional threaded connection between two pipes. A union includes a central union nut that allows the connection to be separated without cutting or rotating the adjoining pipe sections.
What does three-piece union mean?
The union consists of two threaded end pieces and a central union nut that draws the two sides together to form the connection.
What type of pipe connections does this union use?
The fitting uses female NPT threaded connections on both ends.
Where are pipe unions commonly installed?
Unions are commonly installed near pumps, valves, meters, equipment, and other components that may require future removal or service.
Why choose a galvanized union?
The hot-dip galvanized finish provides additional resistance to rust and corrosion in piping systems exposed to moisture or outdoor conditions.
What standard applies specifically to malleable iron unions?
The supplied product information states that malleable unions conform to ASME B16.39.
What standard applies to the galvanized coating?
Hot-dipped galvanized fittings conform to ASTM A153 according to the supplied product information.
What thread standard applies?
NPT threads conform to ASME B1.20.1.
Is this fitting UL Listed and FM Approved?
The supplied product information states that Class 150 fittings are UL Listed and FM Approved at 300 PSI.
Important Ordering & Installation Notes
- Confirm the required nominal pipe size before ordering.
- This union uses female NPT threaded connections on both ends.
- Install the union where future disassembly or equipment access may be required.
- Make sure both union halves are properly aligned before tightening the union nut.
- Malleable unions conform to ASME B16.39 according to the supplied product information.
- NPT threads conform to ASME B1.20.1.
- Hot-dipped galvanized fittings conform to ASTM A153.
- Use compatible galvanized pipe, fittings, thread sealant, and accepted threaded installation practices.
- Avoid damaging the galvanized coating during handling and installation.
- Depressurize and isolate the piping system before loosening or separating an installed union.
- Verify system pressure, service, potable-water, code, and approval requirements before installation.
- Refer to the specification sheet and Certificate of Conformance for additional product information.
