IMPA: 733701

Marine-Grade Brass Flared Union Couplings

Brass flared union couplings are essential components for joining flared tubes in marine piping systems. Manufactured from high-grade brass, these couplings offer excellent corrosion resistance, making them ideal for use in seawater environments and other demanding applications. Their precision-machined threads and flared seats ensure a secure, leak-proof connection that can be easily disassembled for maintenance or system modification.

These unions are widely used in fuel lines, hydraulic systems, cooling water circuits, and instrumentation piping aboard commercial vessels, boats, and offshore installations. The flared design provides a metal-to-metal seal that withstands high pressures and temperature fluctuations, ensuring long-term reliability in critical shipboard operations.

Key Features

Technical Specifications

MaterialHigh-Grade Brass
Connection TypeFlared Union
Nominal Sizes1/4", 3/8", 1/2", 3/4", 1" O.D.
Thread TypeBSPT / NPT
Maximum Working PressureUp to 2,000 psi (size-dependent)
Operating Temperature-20°C to +120°C
Media CompatibilityFuel, oil, hydraulic fluid, fresh & seawater

Frequently Asked Questions

What is a brass flared union coupling used for?

It is used to connect flared tubing in marine piping systems, providing a leak-tight seal that can be easily disconnected for maintenance.

Are these couplings suitable for seawater applications?

Yes, brass offers good corrosion resistance in marine environments, making them suitable for contact with seawater in various shipboard systems.

Can these unions be used with hydraulic systems?

Absolutely. They are designed to handle high pressures, making them ideal for hydraulic lines and other demanding applications.

What sizes are available?

We stock common sizes from 1/4" to 1" outside diameter, but custom sizes can be ordered upon request.

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