Tube To Tube Fittings

Cupro-nickel tube fittings made from CuNi 90/10 (C70600) and CuNi 70/30 (C71500) are used in a variety of applications where resistance to corrosion, particularly in seawater and other harsh environments, is crucial. Here's a general overview of these materials and the types and specifications of fittings you might encounter:
Materials OverviewCuNi 90/10 (C70600):Composition: 90% copper, 10% nickel.Properties: Good resistance to seawater corrosion, moderate strength, and good machinability. It’s often used in marine environments and for heat exchangers.CuNi 70/30 (C71500):Composition: 70% copper, 30% nickel.Properties: Higher nickel content provides better strength and corrosion resistance compared to CuNi 90/10. It's used in more demanding applications like high-pressure systems and complex marine environments.Types of Tube FittingsCompression Fittings:
Types: Straight, elbow, tee, and cross.Features: Typically consist of a compression nut, a compression ring (or ferrule), and a body. These fittings are designed to create a tight seal and are ideal for applications involving vibrations or temperature fluctuations.Flare Fittings:
Types: Male and female flare, flare-to-tube.Features: These fittings use a conical seat to make a metal-to-metal seal, offering excellent resistance to high pressures and vibrations.Push-to-Connect Fittings:
Types: Straight, elbow, and tee.Features: Designed for quick and easy connections, these fittings rely on a collet and O-ring to secure the tube in place.Union Fittings:
Types: Straight, elbow, and tee unions.Features: Allow for easy disassembly of tubing without the need to remove the fitting from the connected pipes. They are useful for maintenance and repairs.Adapters:
Types: Male to female, reducing, and transition.Features: Used to connect different sizes or types of fittings or to adapt between different standards.SpecificationsDimensions:
OD (Outer Diameter): Standard tube diameters, commonly in inches or millimeters.Wall Thickness: Affects the strength and pressure rating of the fittings.Pressure Ratings:
Varies: Based on fitting type, size, and material. Always check the manufacturer’s specifications for maximum working pressures.Temperature Range:
Service Temperature: Typically up to around 400°F (204°C) for CuNi 90/10 and slightly higher for CuNi 70/30.Standards:
Common Standards: ASTM B171 (CuNi 90/10), ASTM B122 (CuNi 70/30), and various ISO standards. Always confirm with specific industry or application standards.Corrosion Resistance:
Seawater: Both alloys offer excellent resistance, with CuNi 70/30 providing superior performance in highly corrosive environments.ApplicationsMarine: Shipbuilding, offshore platforms, and desalination plants.Chemical Processing: Heat exchangers, coolers, and chemical handling systems.Industrial: Hydraulic systems, high-pressure applications, and general fluid handling.When selecting fittings, ensure they are compatible with your tubing and application requirements. Consult manufacturer data sheets and industry standards to ensure the fittings meet the necessary specifications for your application.

Hastelloy C-276 is a nickel-molybdenum-chromium superalloy known for its exceptional corrosion resistance and high-temperature stability. It is particularly well-suited for harsh environments, including chemical processing, marine applications, and high-temperature industrial processes.
Tube-to-Tube Fittings Made from Hastelloy C-276**1. Types of Tube-to-Tube Fittings:
Compression Fittings:
Types: Straight, elbow, tee, cross.Features: These fittings have a compression nut and ferrule (compression ring) that compresses around the tube to create a tight seal. They are commonly used in applications where a leak-tight connection is necessary and are suitable for handling high pressures.Flare Fittings:
Types: Male and female flare, flare-to-tube.Features: Utilize a conical seat to provide a metal-to-metal seal. These fittings are ideal for high-pressure applications and are also effective in environments prone to vibrations.Union Fittings:
Types: Straight unions, elbow unions, tee unions.Features: Allow for easy disassembly of tubing without removing the entire fitting assembly. Useful in maintenance and repair situations.Adapter Fittings:
Types: Male to female adapters, reducing adapters, transition adapters.Features: Facilitate connections between different sizes or types of tubing or adapt to different standards.Push-to-Connect Fittings:
Types: Straight, elbow, tee.Features: Designed for quick, tool-free connections. Utilize a collet and O-ring mechanism to secure the tube.**2. Specifications:
Material Properties:
Corrosion Resistance: Excellent resistance to oxidizing and reducing acids, including sulfuric, hydrochloric, and phosphoric acids.Temperature Range: Effective in temperatures up to approximately 1,800°F (982°C).Mechanical Properties: High strength and good ductility. Retains properties at high temperatures.Dimensions:
OD (Outer Diameter): Customarily specified in inches or millimeters.Wall Thickness: Depends on the pressure rating and fitting type.Pressure Ratings:
Varies by Fitting Type: The maximum allowable working pressure is dependent on the fitting type, size, and application conditions. Always consult specific manufacturer data for detailed pressure ratings.Standards:
Common Standards: ASTM B574, ASTM B622, and ASTM B626 are relevant for Hastelloy C-276 products. Check for industry-specific standards as required.**3. Applications:
Chemical Processing: Handling of aggressive chemicals and acids in reactors, pumps, and pipelines.Marine Environments: Parts in shipbuilding and offshore oil and gas applications.Aerospace: High-temperature and high-stress components.Industrial: High-performance systems needing exceptional corrosion and temperature resistance.**4. Considerations:
Compatibility: Ensure that Hastelloy C-276 fittings are compatible with the tubing material and the specific application conditions.Installation: Proper installation is crucial for ensuring leak-proof connections and maintaining the integrity of the system.When choosing Hastelloy C-276 tube-to-tube fittings, refer to manufacturer specifications for exact dimensions, pressure ratings, and temperature tolerances. This ensures that the fittings meet the necessary requirements for your application.

Overview of the types of tube fittings, focusing on typical specifications in Carbon steel grades such as A105, A105N.Types of Tube Fittings in Carbon Steel1. Socket Weld Pipe Connector2. Pipe Connector3. Union Connectoro Specifications: Available in NPT, BSP, and other thread types.4. Male Adaptoro Description: Connects a male-threaded pipe to a female-threaded fitting.o Specifications: Threads conform to standards like NPT or BSP.5. Female Adaptoro Description: Connects a female-threaded pipe to a male-threaded fitting.o Specifications: Threads conform to standards like NPT or BSP.6. Hex Nipple7. Reducing Nipple8. Reducing Adaptor9. Reducing Hex Nipple10. Hex Coupling11. Reducing Hex Coupling12. Bushing13. Reducing Bushing14. Flare 45 Degree Elbow Fittings15. Flare 90 Degree Elbow Fittings16. Barbed Fittings17. Quick Release Coupling18. Union Tee19. Union Cross20. Female Teeo Description: Tee fitting with female threads.21. Branch Tee22. Run Tee23. Male Connectoro Description: Connects two female-threaded components.o Features: Male threads on both ends.24. Female Connectoro Description: Connects two male-threaded components.o Features: Female threads on both ends.25. Elbowo Features: Available in various angles such as 45 degrees and 90 degrees.26. Bulk Head Union27. Male Elbowo Description: Elbow fitting with male threads on both ends.o Applications: Used to join female-threaded fittings at an angle.28. Female Elbowo Description: Elbow fitting with female threads on both ends.o Applications: Used to join male-threaded fittings at an angle.29. Union Elbowo Description: Combines the features of a union and elbow fitting.30. OD Cap31. OD Plugo Description: Plugs the end of an outer diameter tube.32. Equal Uniono Description: Joins two pipes or fittings of the same size.33. Reducing Union34. Condensate Poto Description: Collects and removes condensate from a line.35. Air Header Manifoldso Description: Distributes air from a single source to multiple lines.36. Needle Valveo Description: Provides precise control of fluid flow.37. Ball Valveo Description: Controls flow with a spherical ball that rotates.38. Check Valveo Description: Prevents backflow in a system.39. Manifolds Valveo Description: Combines multiple valves into a single manifold.40. Hose Connections41. Front FerruleSpecifications and Standards• Threading Standards: NPT (National Pipe Thread), BSP (British Standard Pipe), Metric.CARBON/ALLOY STEEL: ASTM/ASME A105/105N, ASTM / ASME A182, ASTM / ASME A335 GR F1, F5, F9, F11, F12, F22, F23, F91LTCS: ASTM/ASME A350 LF2, ASME/ASTM A694 F42, F46, F52, F60, F65, F70