Union Fittings
Premium quality union fittings for easy disassembly and maintenance of piping systems
Premium Union Fittings
Starlight Tubes supplies high-quality union fittings designed for easy disassembly and reassembly of piping systems. Our unions allow for quick maintenance and repairs without cutting the pipe, making them essential for systems requiring frequent servicing.
Available in multiple connection types including threaded and socket weld, our union fittings are manufactured from premium materials and undergo rigorous quality testing to ensure reliable performance and compliance with industry standards.
Technical Specifications
ASTM / ASME CompliantTechnical Specifications — High-Pressure Pipe Unions (MSS-SP-83)
Material standards, pressure ratings, and seating designs for MSS-SP-83 forged pipe unions
| Component | Carbon Steel (3000#) | Stainless Steel (3000#) | Seating Design |
|---|---|---|---|
| Male & Female Ends | ASTM A105 | ASTM A182 F316L | Integral Ground Joint / Metal-to-Metal |
| Union Nut | ASTM A105 | ASTM A182 F316L | Heavy Forged Hexagon |
| Optional Seat | Bronze / Brass | Integral Stainless | Precision Spherical Ground |
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Your Trusted Union Fittings Supplier
Starlight Tubes delivers premium union fittings with unmatched quality and reliability for easy maintenance and repairs in piping systems.
Frequently Asked Questions on Union Fittings
Key engineering, tolerance, and international compliance answers from our metallurgical quality desk.
Pipe unions are three-piece fittings that allow easy disconnection and reconnection of pipes without cutting or welding. They consist of a female end, male end, and union nut, making them ideal for equipment maintenance, valve replacement, and system modifications.
Request Project Quotation for Union Fittings
Submit your required sizes, wall thicknesses, material grades, and total tonnage. Our technical sales engineers respond with complete mill pricing and lead times within 24 hours.