ASTM A312 TP316L Seamless Tubes with ASTM A516 Gr.70 Carbon Steel Shell for Heat Exchanger

Yuhong Holding Group Co., Ltd is a globally renowned manufacturer and supplier of premium industrial equipment, including heat exchangers, fired heaters, air coolers, and their critical components. With decades of experience, cutting-edge technology, and a commitment to quality, we deliver high-performance solutions that meet the rigorous demands of industries worldwide. One of our top-tier products is the ASTM A312 TP316L Seamless Tubes with ASTM A516 Gr.70 Carbon Steel Shell for Heat Exchanger. These heat exchangers are designed for superior performance in high-temperature and corrosive environments, making them a reliable choice for diverse industrial applications.

1. ASTM A312 TP316L Chemical Composition and Mechanical Properties

ASTM A312 TP316L is an austenitic stainless steel known for its excellent corrosion resistance, high strength, and superior weldability. The "L" in TP316L indicates its low carbon content, which helps prevent carbide precipitation during welding, ensuring excellent resistance to intergranular corrosion.

Chemical Composition of ASTM A312 TP316L

The molybdenum content in TP316L improves its resistance to pitting and crevice corrosion in chloride environments, making it an ideal material for heat exchanger tubes used in harsh conditions.

Mechanical Properties of ASTM A312 TP316L

These properties ensure that TP316L seamless tubes offer superior strength and durability while maintaining excellent corrosion resistance under high-temperature operating conditions.

2. ASTM A516 Gr.70 Carbon Steel Shell

ASTM A516 Gr.70 is a carbon steel grade widely used for pressure vessels and heat exchanger shells. Its excellent mechanical properties, toughness, and weldability make it suitable for high-pressure and high-temperature applications.

Chemical Composition of ASTM A516 Gr.70

Mechanical Properties of ASTM A516 Gr.70

This carbon steel's ability to withstand extreme pressures and temperatures makes it an ideal material for heat exchanger shells.

3. Weld Overlay Process for Heat Exchanger Components

Weld overlay is a critical process used to enhance the durability and corrosion resistance of heat exchanger components. For ASTM A516 Gr.70 Carbon Steel Shells, overlaying with TP316L stainless steel provides additional protection against corrosion and wear, ensuring the heat exchanger's longevity and reliability.

Key Weld Overlay Parameters

1. Material Compatibility:

   • Base Material: ASTM A516 Gr.70
   • Cladding Material: TP316L Stainless Steel

2. Welding Process:

   • Submerged Arc Welding (SAW) or Gas Tungsten Arc Welding (GTAW) is typically used for high-quality overlay.

3. Thickness:

   • Overlay thickness: 3–5 mm (depending on application requirements).

4. Testing and Inspection:

   • 100% Ultrasonic Testing (UT) to ensure no subsurface defects.
   • Penetrant Testing (PT) to verify the weld surface is free of cracks or porosity.
   • Hydrostatic Testing to ensure the integrity of the shell and tubes.

The overlay process enhances the shell's corrosion resistance, making it suitable for handling aggressive fluids in heat exchangers.

4. Applications of Heat Exchangers with ASTM A312 TP316L Tubes and ASTM A516 Gr.70 Shells

The combination of TP316L seamless tubes and A516 Gr.70 shells makes these heat exchangers versatile, durable, and efficient. They are widely used in a variety of industries.

Key Applications

1. Chemical Processing:

   • For heat recovery, cooling, and heating processes in chemical plants.
   • Suitable for handling corrosive fluids and high-temperature operations.

2. Petrochemical Industry:

   • Used in refineries to transfer heat between hydrocarbons and other fluids.

3. Oil and Gas Industry:

   • For offshore platforms, gas processing plants, and pipelines.
   • Ideal for environments with high chloride content or sour gas.

4. Power Generation:

   • In steam condensers, feedwater heaters, and other heat exchangers in power plants.

5. Food and Beverage Industry:

   • In sanitary heat exchangers used for pasteurization and sterilization.

6. Pharmaceutical Industry:

   • For heat exchangers requiring high resistance to contamination and corrosion.

These heat exchangers' robust construction and high resistance to corrosion ensure long service life and reliable performance in demanding environments.