Steel Pipe Unions – Threaded, Socket-Weld & Butt-Weld Unions for Industrial, Water, Gas & Chemical Piping Systems
Unions are pipe fittings designed to connect two pipes while allowing easy disassembly and maintenance without cutting the pipe. They are commonly used in piping systems where frequent dismantling for inspection, repair, or replacement is required.
Manufactured from carbon steel, stainless steel, alloy steel, and galvanized steel, unions are widely used in oil & gas, chemical, petrochemical, water, and industrial piping systems. They are available in Threaded, Socket-Weld (SW), and Butt-Weld (BW) variants for versatile connection options.
- Description
Description
Product Range / Variants
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Threaded / Screwed Union (NPT/BSPT)
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Socket-Weld (SW) Union
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Butt-Weld (BW) Union
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Stainless Steel Union
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Carbon Steel Union
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Alloy Steel Union
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Galvanized Iron (GI) Union
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Heavy-Duty / High-Pressure Unions
Specifications
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Sizes: ½” to 48″ (DN15 to DN1200)
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Pressure Ratings: SCH 10, SCH 20, SCH 40, SCH 80, SCH 160, XXS
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Standards: ASME B16.11, ASTM A182, ASTM A105, DIN, ISO
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Connection Types: Threaded / SW / BW
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Material Options: Carbon Steel, Stainless Steel, Alloy Steel, GI
Key Features
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Easy assembly and disassembly without cutting pipes
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Leak-proof design for reliable operation
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Suitable for high-pressure and high-temperature applications
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Smooth internal surface ensures unobstructed flow
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Corrosion and chemical resistant depending on material grade
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Available in threaded, socket-weld, and butt-weld types
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Durable, long-lasting, and low maintenance
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Compatible with welded, forged, and threaded piping systems
Applications
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Oil & gas pipelines and refineries
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Water supply & distribution networks
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Chemical & petrochemical process lines
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Power plants & boiler systems
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HVAC and chilled water piping
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Food & pharmaceutical piping systems
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Firefighting & sprinkler systems
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Marine & offshore piping
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Industrial fluid & slurry transport systems
Material Grades Available
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Carbon Steel: ASTM A105, ASTM A182, ASTM A234 WPB / WPC
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Stainless Steel: SS 304, 304L, 316, 316L, 202
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Alloy Steel: ASTM A335 P11, P22, P91
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Mild Steel (MS)
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Galvanized Iron (GI)
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Duplex & Super Duplex Steel
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Nickel Alloys: Inconel, Monel, Hastelloy
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