Dielectric-Revised

Dielectric Insulated Unions

Dielectric Insulated Unions Dielectric insulated unions from HART Industrial Unions, LLC help prevent galvanic corrosion and provide tight seals in piping and plumbing applications. more >
HARTCopperSweat-Revised

Copper Sweat Tube Unions

Copper Sweat Tube Unions HART Industrial Unions, LLC provides customers with copper sweat tube unions for joining copper tubing through soldering for water flow applications. more >
FemaleThreaded-Revised

Female Threaded Unions

Female Threaded Unions HART Industrial Unions, LLC offers high-quality female threaded unions to meet customer demand for high-pressure, leak-proof seals. more >
Hammer-Revised

Hammer Lug Unions

Hammer Lug Unions Hammer lug unions from HART Industrial Unions, LLC are well suited for connecting flexible hose and pipeline assemblies in high-pressure applications. more >
Orifice-Revised2

Orifice Unions

Orifice Unions High-performance orifice unions from HART Industrial Unions, LLC regulate material flow and predetermined pressure drop in piping systems. more >
SocketWeld-Revised

Socketweld Unions

Socketweld Unions HART Industrial Unions, LLC has various socketweld union options available, including Class 3000 and 6000, copper sweat tube, and tube socketweld unions. more >
MaleThreaded-Revised

Male Threaded Unions

Male Threaded Unions At HART Industrial Unions, LLC, we offer our customers high-quality male threaded unions that provide Class 3000 and Class 6000 service. more >
ButtWeld-Revised

Buttweld Unions

Buttweld Unions Buttweld unions from HART Industrial Unions, LLC are strong, welded fittings that direct, stop, or split liquid or gas flow in a piping system. more >
TubeSocketWeld-Revised

Tube Socketweld Unions

Tube Socketweld Unions HART Industrial O-Ring Unions are engineered to provide Class 3000 Service and are the most popular union in the industry for general purpose applications. more >
Petroleum-Revised

Petroleum & Natural Gas Unions

Petroleum & Natural Gas Unions HART Industrial Unions, LLC manufactures durable, corrosion-resistant petroleum and natural gas carbon steel unions with dielectric insulation. more >
HighTemp

High Temperature / Steam Unions

High Temperature / Steam Unions High-temperature and steam unions from HART Industrial Unions, LLC are ideal for environments with extreme temperatures and pressure levels. more >
Orings-Revised

O-Rings

O-Rings At any pressure, HART O-Rings actually strengthen the seal rather than loosen it. more >

Best-In-Class Manufacturer of Speciality High Pressure O-Ring Pipe Unions

Proudly Made in the USA and Distributed Globally

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About Us
supplier
Leading Domestic Supplier of Sure Seal O-Ring Unions
turnaround
Rapid Turnaround of Difficult-to-Source Pipe and Tube Unions
support
Fully Support the Increased Demand for High Pressure Pipe Union Applications

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Did You Know - HART offers high-temp steam unions!

Did you know… ….that HART Industrial Unions now offers high-pressure / high-temperature resistant pipe unions that can withstand 1400°F for hydrocarbon and superheated steam service? Unions containing spiral wound gaskets can be supplied to meet national standards such as MSS-SP-83 and ASME B16.20. The pipe union design is similar in principle to flange joints but […]

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IMTS Chicago

HART attends IMTS - Chicago

The International Manufacturing Technology Show is the largest and longest-running industry trade show in the Western Hemisphere. IMTS is where the creators, the builders, the sellers, and the drivers of manufacturing technology come to connect and be inspired. Industry professionals from around the globe visit IMTS to discover the latest innovations in digital and traditional […]

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HART In-Plant / On-Site Training

At HART we offer in person hands-on training and customer product training workshops! Our one and a half hour, hands-on training workshop delivered by a HART Product Specialist,

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