ASC
300# Extra Heavy Black Malleable Iron Cap
- Availability:
- Usually in Stock – Ships Quickly
- Weight:
- 0.00 LBS
Description
300# Extra Heavy Black Malleable Iron Cap
300# extra heavy black malleable iron caps close and seal the end of a male-threaded pipe, pipe nipple, valve outlet, or compatible fitting. The female NPT connection provides a secure threaded closure for demanding commercial, industrial, mechanical, fire-protection, maintenance, and repair applications.
Select the required nominal pipe size from the product options above. The selected variation determines the ASC item number, online selling price, weight, net cost, and other size-specific product information.
Product Highlights
- 300# / Class 300 extra heavy black malleable iron construction
- Single female NPT threaded connection
- Designed to close the end of a compatible male-threaded component
- Provides a removable threaded termination point
- Manufactured to ASME B16.3 requirements
- Threads conform to ASME B1.20.1
- Malleable iron material conforms to ASTM A197
- UL Listed
- ASC Figure 3163
- 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 |
| Function | Threaded Pipe-End Closure |
| Thread Standard | ASME B1.20.1 |
| Dimensional Standard | ASME B16.3 |
| Material Standard | ASTM A197 |
| Finish | Black |
| Listing | UL Listed |
| Manufacturer | ASC |
| Figure Number | 3163 |
| Available Sizes | 1/4" through 3" |
How a Threaded Pipe Cap Works
A threaded pipe cap has one female NPT opening and a closed end. The cap threads onto a compatible male-threaded pipe, pipe nipple, valve outlet, or fitting to terminate the line and provide a removable closure for future access, maintenance, testing, or system modification.
Common Applications
Commercial and Mechanical Systems
- Closing unused threaded pipe ends
- 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
- Temporary or permanent line termination
Product Resources
Review the ASC malleable iron threaded fittings catalog for dimensions, weights, standards, and additional product information before installation.
Need Help Selecting a 300# Black Malleable Iron Cap?
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# black malleable iron cap used for?
It closes and seals the end of a compatible male-threaded pipe, pipe nipple, valve outlet, or fitting.
Does this cap have female threads?
Yes. The cap has one female NPT threaded opening and a closed end.
Can the cap be removed later?
Yes. Because it is threaded, the cap can be removed for maintenance, inspection, testing, or future system changes when properly installed and accessible.
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 cap has one female NPT connection and a closed end.
- The selected variation determines the ASC item number, online selling price, weight, and net cost.
- Confirm the nominal size and thread type of the mating component before ordering.
- Confirm that a threaded cap is appropriate for the required permanent or removable closure.
- Confirm pressure, temperature, media compatibility, and application requirements before installation.
- Use an approved thread sealant suitable for the piping media and operating conditions.
- Depressurize and drain the piping system before removing an installed cap.
- 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.
