DIN 28181 P235GH 16Mo3 P215NL X5CrNi18-10 X5CrNiMo17-12-2 Heat Exchanger Tube Welded Steel Tubes For Tubular Heat Exchangers

Dimensions, Material, Specification

DIN 28181 specifies the requirements for welded steel tubes used in tubular heat exchangers. These tubes are designed to withstand high pressures and temperatures, making them suitable for various industrial applications. The dimensions of these tubes typically conform to international standards, ensuring compatibility and reliability in heat exchanger systems.

Key Features

• High Strength: Designed to endure high pressure and temperature.
• Corrosion Resistance: Suitable for various corrosive environments.
• Weldability: Excellent welding characteristics for easy fabrication.
• Durability: Long service life under demanding conditions.

Chemical Composition

Mechanical Properties

Steel Grade

The steel grades specified in DIN 28181 include:

• P235GH: A non-alloy steel grade suitable for pressure vessels and heat exchangers.
• 16Mo3: A chromium-molybdenum alloy steel known for its high-temperature strength.
• P215NL: A low-alloy steel grade with good weldability and toughness.
• X5CrNi18-10: Austenitic stainless steel with excellent corrosion resistance.
• X5CrNiMo17-12-2: Austenitic stainless steel with added molybdenum for enhanced corrosion resistance.

Application

These welded steel tubes are primarily used in:

• Heat Exchangers: For transferring heat between fluids.
• Boilers: In power generation and industrial processes.
• Pressure Vessels: For storing gases and liquids under pressure.
• Chemical Processing: In environments where corrosion resistance is critical.

Possible Alternative Grades

Depending on specific application requirements, alternative grades may include:

• P265GH: Similar to P235GH but with higher strength.
• SAE 304: An alternative austenitic stainless steel with good corrosion resistance.
• SAE 316: Offers better corrosion resistance than 304, especially in chloride environments.
• P355GH: A higher strength alternative for pressure applications.

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