Paul Tube Fittings stands out as a top-notch manufacturer and supplier of high-quality copper hydraulic fittings, proudly based in Houston, USA. Known for their precision engineering and dependable performance, this company focuses on providing durable, corrosion-resistant fittings that meet the rigorous demands of hydraulic systems across a variety of industries. Each fitting is crafted with advanced techniques and premium materials, ensuring they are strong, leak-proof, and built to last. With a strong commitment to customer satisfaction, timely deliveries, and competitive pricing, Paul Tube Fittings has earned a reputation as a trusted source for reliable copper hydraulic fitting solutions throughout the United States.
When it comes to copper hydraulic fittings, they are typically made from 99.9% pure copper, like the C12200 or C11000 grades, which are celebrated for their outstanding thermal and electrical conductivity, as well as their natural resistance to corrosion. These fittings boast impressive tensile strength, reaching up to 300 MPa, along with good ductility, making them ideal for high-pressure systems. They also exhibit moderate yield strength and excellent fatigue resistance, allowing them to thrive under stress and vibration. Copper’s ability to handle temperature fluctuations and its compatibility with brazing or soldering ensure secure, long-lasting hydraulic connections.
| DESIGN STANDARD | DIN 2353/ ISO 8434-1 |
| MATERIAL | COPPER |
| SERIES | LL- LOW PRESSURE , L- MEDIUM PRESSURE, S- HIGH PRESSURE |
| WORKING PRESSURE | (LOW) LL SERIES – 100 BAR |
| (MEDIUM)L SERIES – 100 BAR TO 500 BAR | |
| (HEAVY)S SERIES – 200 BAR TO 800 BAR | |
| SIZE RANGE | LL SERIES – 4LL TO 12LL |
| L SERIES – 6L TO 42L | |
| S SERIES – 6S TO 38S | |
| CONNECTIONS | TUBE TO TUBE , TUBE TO MALE THREAD , TUBE TO FEMALE THREAD , TUBE TO BUTT WELD , TUBE TO SOCKET WELD , TUBE TO JIC 37* , TUBE TO 24* CONE, TUBE TO SWIVEL END , TUBE TO ADJUSTBALE STANDPIPE |
| WELD NIPPLE TO MALE THREAD , WELD NIPPLE TO FEMALE THREAD , WELD NIPPLE TO BUTT WELD , WELD NIPPLE TO SOCKET WELD , WELD NIPPLE TO 24* CONE , WELD NIPPLE TO 37* JIC , WELD NIPPLE TO SWIVEL | |
| BODY TYPE | FORGED, BAR STOCK |
| SURFACE | NATURAL FINISH |
| TEMPERATURE | COPPER – (-60*C TO 175*C) |
| STANDARD | WERKSTOFF NR. | UNS |
| Copper | 1786 | C12200 |
Chemical Requirements: | |||||
| Copper Pipe (Incl. Silver) | 99.85% Min. | ||||
| Phosphorus | 0.013 to 0.5% | ||||
| Total Impurities | 0.06% Max. | ||||
| Density | 8.89 g/cm3 |
| Melting Point | 1370 °C (2500 °F) |
| Tensile Strength | Psi – 1,15,000 , MPa – 790 |
| Yield Strength (0.2%Offset) | Psi – 52,000 , MPa – 355 |
| Elongation | 40 % |
| Condition | Tensile strength N/mm2 | % Elongation on 5.65 A Min. | ||||
| Annealed | 200-250 | 40 | ||||
| Half Hard | 250 Min | 30 | ||||
| As Manufactured | 280 Min | |||||
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You’ll find copper hydraulic fittings widely used across numerous industries, thanks to their strength, corrosion resistance, and durability. They play a crucial role in HVAC and refrigeration systems, where efficient thermal conductivity and leak-proof joints are vital. In the industrial and construction sectors, these fittings guarantee reliable fluid transfer in hydraulic machinery. They’re also essential in marine, aerospace, and automotive applications, delivering dependable performance in high-pressure settings. Their compatibility with various tubing systems and resilience against thermal and mechanical stress make them a go-to choice for precision fluid handling and control.
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