ASC
300# Extra Heavy Galvanized Malleable Iron Coupling
- Availability:
- Usually in Stock – Ships Quickly
- Weight:
- 0.00 LBS
Description
300# Extra Heavy Galvanized Malleable Iron Coupling
300# extra heavy galvanized malleable iron couplings join two same-size male NPT threaded pipes, pipe nipples, valves, or fittings in a straight-line connection. The two female NPT openings provide a durable inline connection for demanding commercial, industrial, mechanical, fire-protection, maintenance, and repair applications where corrosion resistance and a galvanized finish are required.
Select the required nominal pipe size from the product options above. The selected variation determines the ASC item number, online selling price, estimated weight, net cost, and other size-specific product information.
Product Highlights
- 300# / Class 300 extra heavy galvanized malleable iron construction
- Female NPT threaded connections on both ends
- Joins two same-size male-threaded components in a straight line
- Full coupling design for permanent threaded piping connections
- Galvanized finish provides added corrosion resistance
- Designed for demanding threaded piping applications
- Manufactured to ASME B16.3 requirements
- Threads conform to ASME B1.20.1
- Malleable iron material conforms to ASTM A197
- UL Listed
- ASC Figure 3166
- Available in nominal pipe sizes from 1/4" through 3"
Technical Specifications
| Material | Galvanized Malleable Iron |
|---|---|
| Pressure Class | 300# / Class 300 / Extra Heavy |
| Connection | Female NPT x Female NPT |
| Fitting Type | Full Coupling |
| Function | Straight Same-Size Pipe Connection |
| Thread Standard | ASME B1.20.1 |
| Dimensional Standard | ASME B16.3 |
| Material Standard | ASTM A197 |
| Finish | Galvanized |
| Listing | UL Listed |
| Manufacturer | ASC |
| Figure Number | 3166 |
| Available Sizes | 1/4" through 3" |
How a Threaded Coupling Works
A threaded coupling has two female NPT openings aligned in a straight line. Each opening threads onto a compatible male-threaded pipe, pipe nipple, valve, or fitting of the same nominal size, allowing two components to be joined securely while maintaining a continuous piping run.
Common Applications
Commercial and Mechanical Systems
- Mechanical-room piping
- Water and utility piping
- Compressed-air systems
- Equipment and valve connections
- Pipe-extension connections
- 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 steam service
- Galvanized piping installations
Product Resources
Review the ASC threaded fittings catalog for dimensions, weights, standards, and additional product information before installation.
Need Help Selecting a 300# Galvanized Malleable Iron Coupling?
Our industrial PVF specialists can help confirm the required pipe size, pressure class, thread type, material compatibility, service conditions, and product availability.
Frequently Asked Questions
What is a 300# galvanized malleable iron coupling used for?
It joins two compatible same-size male NPT threaded pipes, pipe nipples, valves, or fittings in a straight-line connection.
Does this coupling have female threads on both ends?
Yes. ASC Figure 3166 has female NPT threaded connections on both ends.
Is this a reducing coupling?
No. This is a straight full coupling designed to connect two male-threaded components of the same nominal pipe size.
What is the benefit of the galvanized finish?
The galvanized finish provides added corrosion resistance compared with an unfinished black malleable iron fitting.
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 listings apply?
The fitting conforms to ASME B16.3, ASTM A197, and ASME B1.20.1 requirements. ASC lists its Class 300 malleable iron fittings as UL Listed.
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 threaded connections on both ends.
- The selected variation determines the ASC item number, online selling price, estimated weight, and net cost.
- Confirm that both mating components have the same nominal pipe size and compatible male NPT threads.
- Confirm that a straight full coupling is appropriate for the required 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.
- Avoid overtightening, which may damage the coupling or mating threads.
- 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.
