HALF COUPLING(1/2SPU)

HALF COUPLING (1/2SPU) – Compact Branch Connection for High-Pressure Piping Systems

The HALF COUPLING (1/2SPU) is a specialized pipe fitting designed to create a secure, threaded branch connection from a main pipeline to a smaller instrument, valve, or secondary line. Unlike full couplings that join two pipes end-to-end, this fitting features internal threads on one end and a weld-prep or plain end on the other, allowing it to be permanently welded onto a header pipe while providing a threaded outlet for easy attachment of components. Manufactured using the precision lost wax casting process, it ensures exceptional dimensional accuracy, smooth internal surfaces to minimize turbulence, and consistent mechanical strength—making it ideal for critical applications in oil & gas, chemical processing, power generation, and hydraulic systems.

Key Features & Benefits

• Hybrid Connection Design: Combines a welded base for permanent, leak-proof integration into the main pipeline with a threaded outlet for quick, tool-assisted attachment of instruments, gauges, or smaller pipes.

• Compact & Space-Saving: Its short, cylindrical profile minimizes footprint, making it perfect for tight spaces or complex piping layouts where full couplings or flanges would be impractical.

• High-Pressure Integrity: Engineered to withstand extreme pressures and temperatures, with a robust body that resists deformation, vibration, and thermal cycling—ensuring long-term reliability in demanding environments.

• Precision Casting for Consistency: The lost wax process guarantees uniform wall thickness, accurate thread engagement, and superior surface finish, reducing the risk of leaks or premature failure.

• Versatile Material Options: Available in stainless steel, carbon steel, alloy steel, and tool steel, allowing customization for corrosive, high-temperature, or high-stress applications.

• Global Compliance: Manufactured to meet international standards including ASTM, JIS, DIN, and BS NF, ensuring compatibility with global piping systems and regulatory requirements.

Technical Specifications

• Size Range: 1/8" to 4" (as shown in the dimension table, with 1/2" being a common size for instrument connections)

• Weight: 5g – 50kg (varies by size and material)

• Process: Lost wax casting for superior quality and consistency

• Surface Treatment: Customizable per customer requirements (e.g., passivation, coating, or plating)

• Inspection: Self-inspection and third-party inspection available, with full documentation including material composition, size measurement, and hardness test reports

Ideal Applications

• Instrumentation Branches: Connecting pressure gauges, thermocouples, or flow meters to main process lines.

• Hydraulic & Pneumatic Systems: Creating take-off points for control valves or actuators.

• Chemical & Petrochemical Plants: Handling corrosive fluids where leak-proof integrity is critical.

• Power Generation: High-temperature steam or coolant line connections.

• Marine & Offshore: Vibration-resistant connections in shipboard piping systems.

This fitting is a cornerstone of efficient, reliable piping design—offering the permanence of welding with the convenience of threading, all in a compact, high-performance package.