Socket Weld Union 3000LB A105

Keep small-bore piping systems ready for maintenance without ever needing to reach for a cutting torch. The Socket Weld Union 3000lb A105 joins two sections of pipe with a strong, leak resistant connection that can be taken apart in seconds when the job calls for it.

Each pipe end sits inside a recessed socket and is fillet welded externally, forming a joint that holds firm under pressure. A central threaded nut connects the two welded ends, so when it's time to inspect, repair, or swap out equipment, engineers can disconnect the union without cutting into the pipeline itself. It's a practical solution for small pipe diameters, where threaded fittings risk leaks and full butt-welding would leave you with no way to separate the joint later.

Forged from carbon steel to the A105 specification, this union is built for ambient and high-temperature service, handling pressures up to 3,000 PSI (approximately 206 bar) and temperatures up to 450°C. That makes it a dependable choice for chemical plants, oil and gas facilities, and fuel lines carrying non-corrosive or mildly corrosive fluids.

From offshore platforms to power stations, water treatment works to marine engine rooms, this union earns its place in pipework across oil and gas, chemical and petrochemical, power generation, water treatment, municipal engineering, and marine applications. Wherever pipelines need to come apart as easily as they went together, it's a fitting worth specifying.

Summary: 

• Used to join two sections of small-bore piping so they can be easily disconnected later without cutting the pipe
• The pipe end fits inside a recessed pocket (socket) of the fitting before being fillet-welded externally, creating a strong, leak-resistant joint
• A three-piece fitting (two welded ends and a central threaded nut) that allows you to take apart the pipeline for maintenance or equipment replacement
• A high-pressure rating meaning the fitting is designed to handle operating pressures up to 3,000 PSI (approx. 206 bar)
• A standard specification for forged carbon steel built for ambient- and high-temperature service in pressure systems
• Used in industrial settings handling high pressures and temperatures up to 450°C
  
  

Applications: 

• Commonly used in;
• Chemical
• Food & beverage
• Pharmaceutical low pressure pipelines
• Oil & gas lines
• Power generation, water treatment
• Municipal engineering and marine engineering