ASC
300# Extra Heavy Black Malleable Iron Coupling
- Availability:
- Usually in Stock – Ships Quickly
- Weight:
- 0.00 LBS
Description
300# Extra Heavy Black Malleable Iron Coupling
300# extra heavy black malleable iron couplings create a straight threaded connection between two male-threaded pipes, nipples, valves, or compatible fittings of the same nominal pipe size. The female NPT x female NPT configuration provides a durable Class 300 connection for demanding commercial and industrial piping systems.
Select the required nominal pipe size from the product options above. The selected variation determines the ASC item number, UPC, online selling price, weight, net cost, and other size-specific product information.
Product Highlights
- 300# / Class 300 extra heavy black malleable iron construction
- Female NPT x female NPT threaded connections
- Connects two male-threaded components of the same nominal pipe size
- Straight-through coupling design
- Manufactured to ASME B16.3 requirements
- Threads conform to ASME B1.20.1
- Malleable iron material conforms to ASTM A197
- UL/ULC Listed and FM Approved
- ASC Figure 3166
- Available in nominal pipe sizes from 1/4" through 3"
Technical Specifications
| Material | Black Malleable Iron |
|---|---|
| Pressure Class | 300# / Class 300 / Extra Heavy |
| Connection | Female NPT x Female NPT |
| Connection Sizes | Equal Nominal Pipe Size |
| Pattern | Straight Coupling |
| Thread Standard | ASME B1.20.1 |
| Dimensional Standard | ASME B16.3 |
| Material Standard | ASTM A197 |
| Finish | Black |
| Approvals | UL/ULC Listed and FM Approved |
| Manufacturer | ASC |
| Figure Number | 3166 |
| Available Sizes | 1/4" through 3" |
How a Threaded Coupling Works
A threaded coupling has female NPT threads on both ends and joins two male-threaded components in a straight line. Each end accepts a compatible male-threaded pipe, nipple, valve, or fitting of the same nominal size. The coupling provides a removable mechanical connection without welding, soldering, or grooving.
Common Applications
Commercial and Mechanical Systems
- Commercial plumbing systems
- Mechanical-room piping
- Equipment and valve connections
- Water and utility piping
- Compressed-air systems
- General repair and maintenance
Industrial and Fire-Protection Service
- Industrial process piping
- Fire-protection piping where approved
- Oil and petroleum piping
- Compatible gas service
- Approved low-pressure steam service
- Maintenance, repair, and operations applications
Product Resources
Review the ASC malleable iron threaded fittings catalog before installation.
Need Help Selecting a 300# Black Malleable Iron Coupling?
Our industrial PVF specialists can help confirm the required pipe size, pressure class, female x female thread configuration, material compatibility, service conditions, and product availability.
Frequently Asked Questions
What is a 300# black malleable iron coupling used for?
It joins two male-threaded pipes, nipples, valves, or compatible fittings of the same nominal pipe size in a straight line.
What connections does this coupling have?
It has female NPT threads on both ends, with both openings sized for the same nominal pipe size.
How is a coupling different from a union?
A coupling joins two male-threaded components by rotating the coupling or connected piping during assembly. A union includes a central nut that allows the piping connection to be separated without rotating the connected pipe.
What pressure class is this fitting?
This fitting is manufactured as a 300# / Class 300 extra heavy threaded malleable iron fitting.
What sizes are available?
Available product variations range from 1/4" through 3" nominal pipe size.
What standards and approvals apply?
The fitting conforms to ASME B16.3, ASTM A197, and ASME B1.20.1 requirements and is UL/ULC Listed and FM Approved.
Should thread sealant be used during installation?
Use an approved pipe-thread sealant or thread tape selected for the piping media, pressure, temperature, applicable codes, and manufacturer recommendations.
Important Ordering Notes
- Select the required nominal pipe size before adding the product to your cart.
- This coupling has female NPT threads on both openings.
- Both threaded openings are the same nominal pipe size.
- The selected variation determines the ASC item number, UPC, online selling price, weight, and net cost.
- Confirm the thread type and nominal size of both mating components before ordering.
- Confirm that a female x female straight coupling is appropriate for the piping layout.
- Confirm pressure, temperature, media compatibility, and application requirements before installation.
- Use an approved thread sealant suitable for the piping media and operating conditions.
- Support connected piping properly to avoid excessive mechanical stress on the fitting.
- Installation should be completed by qualified personnel and comply with applicable codes and standards.
