Forged Carbon Steel Threaded Union | Removable High Pressure Pipe Connection

The Forged Carbon Steel Threaded Union is a three-piece fitting that allows two threaded pipes to be connected and disconnected without unthreading the pipes from the fitting ends. The union consists of three components: two threaded ends (male or female, typically female) that screw onto the pipe ends, and a center nut that pulls the two ends together against a sealing surface. Unions are essential in systems that require occasional disassembly for maintenance, cleaning, or component replacement — because without a union, you would have to unthread the entire pipe run to disconnect a single point. The union is forged from ASTM A105 carbon steel for high pressure service (Class 3000 or 6000). Sealing can be either metal-to-metal (ground joint) or with a replaceable gasket (typically PTFE or elastomer).

Why Choose Us / Advantage

Removable Without Pipe Rotation: The center nut allows disconnection without turning pipes.

Replaceable Seat: Gasket type unions allow seat replacement without replacing the whole union.

Class 6000 Available: High pressure rating even in removable design.

Color Coded Nut: Identification marks for easy size recognition.

Full Traceability: Heat number on request.

Technical Data

★ Specification Class 3000 Class 6000

★ Material Forged Steel ASTM A105 Forged Steel ASTM A105

★ Type Threaded union (three-piece) Threaded union

★ Connection Female NPT / BSP (both ends) Female NPT / BSP

★ Seal Type Metal-to-metal or PTFE gasket Metal-to-metal

★ Pressure 3000 PSI 6000 PSI

★ Size Range 1/8″ – 4″ 1/8″ – 2″

★ Standard ASME B16.11 ASME B16.11

★ Reusability Yes (multiple times) Yes

Applications

● Pump suction and discharge connections (allows pump removal)

● Test connections (remove union to install test equipment)

● Instruments requiring periodic calibration removal

● Steam tracing lines (allow disconnection for maintenance)

● Hydraulic system components needing replacement