Service Metal
150# Black Malleable Caps
- SKU:
- SBCP
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Black Malleable Iron Cap
150# Black Malleable Iron Caps are designed to securely close the end of threaded piping systems, providing a dependable termination point for maintenance, temporary or permanent system isolation, and future piping expansion.
Manufactured from durable malleable iron, these Class 150 caps are suitable for a wide range of industrial, commercial, plumbing, and mechanical applications including water, gas, oil, and fire protection piping systems.
Product Highlights
- Threaded cap for terminating piping systems
- Designed to seal the end of male-threaded pipe
- Suitable for maintenance, system isolation, and future expansion
- Durable black malleable iron construction
- Class 150 fitting
- Malleable castings conform to ASTM A197
- Fitting dimensions conform to ASME B16.3
- 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 Pipe Cap |
|---|---|
| Material | Malleable Iron |
| Finish | Black |
| Pressure Class | 150# |
| Connection Type | Female NPT Threaded |
| Primary Function | Pipe End Closure / Termination |
| Casting Standard | ASTM A197 |
| Dimensional Standard | ASME B16.3 |
| 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.
Secure Pipe Termination
The female-threaded cap installs over a compatible male NPT pipe end to provide a compact and dependable piping closure.
Standard NPT Threads
NPT threads conform to ASME B1.20.1 for compatibility with properly sized threaded pipe and piping components.
Typical Uses
System Closure & Maintenance
- Closing unused pipe ends
- System isolation
- Maintenance access points
- Temporary or permanent piping termination
Common Services
- Water piping
- Gas piping
- Oil piping
- Fire protection systems
Useful for Future Expansion
A threaded cap can be used to close an unused branch or pipe end while preserving the option to remove the cap later for future system expansion, modification, or maintenance.
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 Service Metal specification sheet and Certificate of Conformance below.
Standards & Approvals
ASTM A197
Malleable iron castings conform to ASTM A197.
ASME Standards
Fitting dimensions conform to ASME B16.3, while NPT threads conform to ASME B1.20.1.
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 caps, plugs, tees, elbows, couplings, bushings, and other threaded fittings for industrial and commercial piping systems.
Frequently Asked Questions
What is a malleable iron cap used for?
A threaded cap is used to close the end of a male-threaded pipe, providing a removable termination point for a piping system.
Is a cap the same as a plug?
No. A cap typically has female threads and installs over a male-threaded pipe end, while a plug typically has male threads and installs into a female-threaded opening.
Can this cap be removed later?
Yes. Because it is threaded, it can be removed for future maintenance, modification, or piping expansion when installed using appropriate threaded piping practices.
What material is this fitting made from?
The cap is manufactured from malleable iron castings conforming to ASTM A197.
What type of threads does the cap use?
The cap uses female NPT threads conforming to ASME B1.20.1.
What dimensional standard applies?
Malleable fitting dimensions conform to ASME B16.3.
Is this a Class 150 fitting?
Yes. This is a 150# black malleable iron cap.
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.
Where can I confirm pipe sizing before ordering?
Use the Common Pipe Diameters and Wall Thickness chart in the Ask Willy section above to verify sizing before ordering.
Important Ordering & Installation Notes
- Confirm the nominal pipe size before ordering.
- This cap uses a female NPT threaded connection.
- Designed to close a compatible male-threaded pipe end.
- NPT threads conform to ASME B1.20.1.
- Use compatible thread sealant and accepted threaded piping installation practices.
- Verify system pressure, service, code, and approval requirements before installation.
- Refer to the Service Metal specification sheet and Certificate of Conformance for additional product information.
