Key Features
- Manufactured from high-strength malleable cast iron for durability and long service life
- Threaded NPT ends ensure secure, leak-tight connections
- Available in black or galvanized (zinc-plated) finish for corrosion resistance
- Pressure ratings up to 300 psi, suitable for various marine applications
- Easy to install and disassemble, allowing quick pipe system maintenance
- Meets or exceeds ASTM A197 specifications for malleable iron fittings
Technical Specifications
| Specification | Details |
|---|---|
| Material | Malleable Cast Iron (ASTM A197) |
| Connection Type | Threaded (NPT per ASME B1.20.1) |
| Size Range | 1/4" - 4" (Nominal) |
| Pressure Rating | Class 150 (300 psi CWP) |
| Temperature Rating | -20°F to 400°F |
| Finish | Black or Galvanized (Zinc-Plated) |
| Standards | ASME B16.39 / ASTM A197 |
| Applications | Marine piping, cooling water lines, steam lines, compressed air systems |
Frequently Asked Questions
What are malleable cast iron unions used for?
Malleable cast iron unions are used in piping systems to connect two pipes while allowing for easy disassembly for maintenance or inspection. They are commonly found in marine engine rooms, cooling water lines, and general shipboard piping.
What is the maximum pressure rating?
These unions are rated for up to 300 psi (Class 150) depending on size and temperature. Always verify the specific pressure rating for your application.
Are these unions suitable for seawater use?
Galvanized (zinc-plated) malleable iron unions can be used in seawater systems, but the zinc coating may erode over time. For long-term seawater exposure, consider a more corrosion-resistant material or proper protective coating.
What pipe sizes are available?
We offer malleable cast iron unions in sizes from 1/4 inch to 4 inches, with standard NPT threads for compatibility with most pipe systems.
Inquire About This Product
Contact us for pricing, availability, and bulk orders:
📧 [Email protected by JavaScript]
📞 [Phone protected by JavaScript]