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- Steel Coupling 1/4" BSP Weldable
- Coupling 1/2'' steel for welding
- Washer metal rubber M10
- Washer metal rubber 1/4''
- Coupling 1 1/4'' steel for welding
- Washer metal rubber M12
- Copper washer 11x16x1mm
- Coupling 1 1/2'' steel for welding
- Washer metal rubber M14
- Washer metal rubber 1/2''
- Coupling 1'' steel for welding
- Washer metal rubber M8
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Connection Type 1
Connection Type 2
Socket Weld Union 1 1/2'' A105 Class 3000
Socket Weld Union 2" P355NH A350 LF2 Class 3000
Union 1 1/4" SW x BSPP MT A105 cl.3000 207bar
Union 1 1/4'' socket weld A105 cl.3000
Union 1'' socket weld A105 cl.3000
Union 1'' socket weld P355NH A350 LF2 cl.3000
Union 1'' SW × BSP Male A105 Class 3000
Union 1/2" SW x NPT A105 Class 3000
Union 1/2'' socket weld A105 cl.3000
Union 1/4" Socket Weld A105 Class 3000
Union 2'' socket weld A105 cl.3000
Union 3/4'' socket weld A105 cl.3000
Union 3/8" Socket Weld A105 Class 3000
Black Steel Weld Unions
Black Steel Weld Unions are high-quality pipe fittings designed to provide a secure, leak-tight, and easily detachable connection in welded piping systems. Their three-piece construction allows pipes, valves, and equipment to be connected or disconnected without cutting or rotating the pipeline, making maintenance and system modifications fast and efficient. Manufactured from premium black carbon steel, these weld unions offer excellent mechanical strength, high pressure resistance, and outstanding durability in demanding industrial environments. They are widely used in oil and gas, petrochemical, chemical processing, power generation, steam systems, hydraulic installations, compressed air networks, and general industrial piping applications.
Customers may also search for these products using the following names: black steel weld union, carbon steel weld union, butt weld union, BW union, pipe weld union, welding union, welded pipe union, three-piece weld union, carbon steel pipe union, industrial weld union, high-pressure weld union, weld-on union, pipe connector for welding, union fitting for welding, ASME weld union, steel welding fitting, pipeline weld connector, disconnect weld fitting, carbon steel union fitting, butt welding connector, welded pipe connector, and black steel pipe fitting.
Black Steel Weld Unions are available in a wide range of sizes, wall thicknesses, and pressure classes, making them suitable for medium- and high-pressure applications. Their precision-machined components and welded construction ensure excellent alignment, dependable sealing, and reliable long-term performance in critical industrial piping systems.
You can order these products from POLBERIS, where you will find a comprehensive selection of premium-quality Black Steel Weld Unions, industrial fittings, valves, and piping components at competitive prices.