Description
Cast Iron 90° Elbow
ASC / SCI Fig. 3351 Cast Iron 90° Elbow provides a 90-degree directional change for compatible Class 125 threaded piping systems.
Manufactured from cast iron conforming to ASTM A126, the Fig. 3351 features female NPT threaded connections and is available with a black or hot-dip galvanized finish for industrial, commercial, water, and mechanical piping applications.
Product Highlights
- ASC / SCI Fig. 3351
- 90° elbow configuration
- ASTM A126 cast iron
- Class 125 fitting design
- Female NPT connections
- UL/ULC Listed and FM Approved on applicable sizes
Technical Specifications
| Product Type | Cast Iron 90° Elbow |
|---|---|
| Brand | ASC / SCI |
| Figure | 3351 |
| Configuration | 90° Elbow |
| Material | Cast Iron |
| Material Standard | ASTM A126 |
| Fitting Standard | ASME B16.4 Class 125 |
| Threads | NPT per ASME B1.20.1 |
| Finish | Black or Hot-Dip Galvanized per ASTM A153 Class A |
| Agency Approvals | UL/ULC Listed and FM Approved on Applicable Sizes |
Construction Details
The SCI Fig. 3351 90° Elbow is manufactured from cast iron conforming to ASTM A126 for use in compatible Class 125 threaded piping systems.
Fitting dimensions conform to ASME B16.4 Class 125, while the female threaded connections use NPT threads in accordance with ASME B1.20.1.
The elbow provides a standard 90-degree change in piping direction while maintaining threaded connections on both ends. Finish options include black or hot-dip galvanized per ASTM A153 Class A.
90° Elbow Design & Applications
Elbow Design
- 90° directional change
- Two female NPT ends
- Class 125 construction
- Cast iron body
- Threaded piping connection
Typical Applications
- Industrial piping systems
- Commercial piping systems
- Water piping applications
- Mechanical piping systems
- Threaded pipe routing
Installation & Selection Considerations
- Confirm Fig. 3351 is required.
- Verify both NPT connections.
- Confirm Class 125 compatibility.
- Use suitable thread sealant.
- Avoid excessive tightening.

Use the ASC / SCI Fig. 3351 product submittal to confirm cast iron construction, Class 125 requirements, NPT threads, finish options, applicable approvals, and 90° elbow specifications.
Need Help Selecting a Cast Iron 90° Elbow?
Need help confirming the threaded connections, Class 125 requirements, finish, or compatibility with your piping system? The GetPipe.com Team can help.
Frequently Asked Questions
What is the SCI Fig. 3351?
The Fig. 3351 is a cast iron threaded elbow designed to provide a 90-degree change in piping direction.
What material is the 90° elbow?
The Fig. 3351 is manufactured from cast iron conforming to ASTM A126.
What fitting class is the Fig. 3351?
The fitting dimensions conform to ASME B16.4 Class 125 requirements.
What type of threads does the elbow use?
The fitting uses female NPT threaded connections conforming to ASME B1.20.1.
What is a 90° elbow used for?
It provides a right-angle directional change between two compatible threaded pipe runs.
What finishes are available?
The Fig. 3351 is available in black or hot-dip galvanized finishes, with the galvanized finish conforming to ASTM A153 Class A.
Is the Fig. 3351 UL/ULC Listed and FM Approved?
Fig. 3351 sizes 1/2" through 2" are identified by ASC as UL/ULC Listed and FM Approved. Confirm current approval requirements for the specific installation.
What should I confirm before ordering?
Confirm the Fig. 3351 configuration, NPT connections, Class 125 requirements, required finish, and applicable approval requirements.
Important Ordering & Installation Notes
- Confirm Fig. 3351 configuration.
- Verify both NPT connections.
- Select the required finish.
- Apply suitable thread sealant.
- Avoid excessive installation torque.