ASME SA192 KL Type Finned Tube with Al1060 Fins For Heat Recovery Steam

Product Specification

ASME SA192 KL Type Finned Tube with Al1060 Fins For Heat Recovery Steam Generators

ASME SA192 KL Type Finned Tube with Al1060 Fins is a high-performance heat exchanger tube. It consists of a strong steel core tube (SA192) designed to handle high pressure, mechanically bonded to highly efficient aluminum fins (Al1060) that maximize heat transfer. The "KL Type" specifies the physical shape and attachment method of the fins.

It's essentially a best-of-both-worlds component: the pressure integrity of steel and the superior heat transfer of aluminum.

Here are some detailed breakdowns:

1. Base Tube: ASME SA192 Seamless Tube

It refers to Seamless Low-Carbon Steel Boiler and Superheater Tubes.

(1) Chemical Composition

(2) Mechanical Properties

The mechanical properties are the minimum requirements that the material must meet after being formed into a tube and heat-treated.

2. KL Type Finned Tube

How it's made: A base groove is machined or rolled into the wall of the steel core tube. An aluminum fin strip is then wound under tension into this groove. The fin material is forced into the groove, creating a tight mechanical bond.

Key Advantages:

• Excellent Contact & Low Resistance: The embedded fin provides very good metal-to-metal contact, minimizing the "contact resistance" that can hinder heat flow.
• Robust and Durable: The fins are mechanically locked in, making them highly resistant to loosening due to thermal expansion/contraction or vibration. This is crucial for long-term reliability.

3.Al1060 Fins

Key Property: High Thermal Conductivity. Al1060 has 99.6% minimum aluminum content, making it one of the purest and most thermally conductive aluminum alloys available (approx. 230 W/m·K). High thermal conductivity is the primary reason for choosing it, as it allows heat to spread rapidly across the fin surface.

4. Key Advantages Summary:

• High-Pressure Capability: The SA192 seamless steel core can handle internal steam/water pressure.
• Excellent Heat Transfer: The large surface area of the highly conductive Al1060 fins maximizes heat pickup from hot gases.
• Durable Bond: The KL-type embedded design ensures the fins stay firmly attached under thermal cycling.
• Corrosion Resistance: The aluminum fins provide good resistance to atmospheric corrosion on the gas side.
• Code Compliance: Manufactured to ASME standards, ensuring quality and reliability for critical applications.

Primary Application Categories

1. Heat Recovery Steam Generators (HRSGs)

This is the most classic and critical application.

How it's used: SA192 KL finned tubes are used in the economizer and evaporator sections of the HRSG.

Inside the Tubes: High-pressure water (economizer) or a water/steam mixture (evaporator) flows through the strong SA192 core tube.

Outside the Tubes: The hot, low-pressure exhaust gas from the gas turbine passes over the array of Al1060 fins.

The Result: Heat is efficiently transferred from the gas to the water, creating high-pressure steam without consuming additional fuel.

2. Waste Heat Boilers (WHBs)

Similar to HRSGs, but used in industrial processes beyond power generation.

Industries: Chemical Plants, Refineries, Petrochemical Facilities, Metal Smelters, Glass Manufacturing.

How it's used: These plants often have process streams of hot, dirty gases that would otherwise be wasted. Waste Heat Boilers use these finned tubes to capture that heat and generate steam for:

• Process Heating: Using steam in other parts of the plant.
• Power Generation: Driving a steam turbine for electricity.
• Cogeneration: Doing both.

3. Economizers

An economizer is a stand-alone unit or a section within a larger boiler.

Function: To pre-heat the boiler feedwater using the residual heat from the flue gas (the gas leaving the boiler stack). This improves the overall efficiency of the boiler system by reducing fuel consumption.

Why it's perfect: The feedwater is at high pressure, and the flue gas is at low pressure. The SA192 tube handles the pressure, while the Al1060 fins maximize heat recovery from the cooler flue gas.

4. Air Heaters

Function: To pre-heat the combustion air going into a boiler furnace using the hot flue gas leaving it.

Benefit: Hotter combustion air leads to more efficient fuel burning, higher flame temperature, and reduced fuel costs.